summaryrefslogtreecommitdiffstats
path: root/src/mux_fcgi.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--src/mux_fcgi.c4268
1 files changed, 4268 insertions, 0 deletions
diff --git a/src/mux_fcgi.c b/src/mux_fcgi.c
new file mode 100644
index 0000000..0230e6b
--- /dev/null
+++ b/src/mux_fcgi.c
@@ -0,0 +1,4268 @@
+/*
+ * FastCGI mux-demux for connections
+ *
+ * Copyright (C) 2019 HAProxy Technologies, Christopher Faulet <cfaulet@haproxy.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ */
+
+#include <import/ist.h>
+#include <import/eb32tree.h>
+#include <import/ebmbtree.h>
+
+#include <haproxy/api.h>
+#include <haproxy/cfgparse.h>
+#include <haproxy/connection.h>
+#include <haproxy/dynbuf.h>
+#include <haproxy/errors.h>
+#include <haproxy/fcgi-app.h>
+#include <haproxy/fcgi.h>
+#include <haproxy/h1.h>
+#include <haproxy/h1_htx.h>
+#include <haproxy/http_htx.h>
+#include <haproxy/htx.h>
+#include <haproxy/list.h>
+#include <haproxy/log.h>
+#include <haproxy/mux_fcgi-t.h>
+#include <haproxy/net_helper.h>
+#include <haproxy/proxy.h>
+#include <haproxy/regex.h>
+#include <haproxy/sc_strm.h>
+#include <haproxy/server.h>
+#include <haproxy/session-t.h>
+#include <haproxy/stconn.h>
+#include <haproxy/stream.h>
+#include <haproxy/trace.h>
+#include <haproxy/version.h>
+
+/* 32 buffers: one for the ring's root, rest for the mbuf itself */
+#define FCGI_C_MBUF_CNT 32
+
+/* Size for a record header (also size of empty record) */
+#define FCGI_RECORD_HEADER_SZ 8
+
+/* FCGI connection descriptor */
+struct fcgi_conn {
+ struct connection *conn;
+
+ enum fcgi_conn_st state; /* FCGI connection state */
+ int16_t max_id; /* highest ID known on this connection, <0 before mgmt records */
+ uint32_t streams_limit; /* maximum number of concurrent streams the peer supports */
+ uint32_t flags; /* Connection flags: FCGI_CF_* */
+
+ int16_t dsi; /* dmux stream ID (<0 = idle ) */
+ uint16_t drl; /* demux record length (if dsi >= 0) */
+ uint8_t drt; /* demux record type (if dsi >= 0) */
+ uint8_t drp; /* demux record padding (if dsi >= 0) */
+
+ struct buffer dbuf; /* demux buffer */
+ struct buffer mbuf[FCGI_C_MBUF_CNT]; /* mux buffers (ring) */
+
+ int timeout; /* idle timeout duration in ticks */
+ int shut_timeout; /* idle timeout duration in ticks after shutdown */
+ unsigned int nb_streams; /* number of streams in the tree */
+ unsigned int nb_sc; /* number of attached stream connectors */
+ unsigned int nb_reserved; /* number of reserved streams */
+ unsigned int stream_cnt; /* total number of streams seen */
+
+ struct proxy *proxy; /* the proxy this connection was created for */
+ struct fcgi_app *app; /* FCGI application used by this mux */
+ struct task *task; /* timeout management task */
+ struct eb_root streams_by_id; /* all active streams by their ID */
+
+ struct list send_list; /* list of blocked streams requesting to send */
+
+ struct buffer_wait buf_wait; /* Wait list for buffer allocation */
+ struct wait_event wait_event; /* To be used if we're waiting for I/Os */
+};
+
+
+/* FCGI stream descriptor */
+struct fcgi_strm {
+ struct sedesc *sd;
+ struct session *sess;
+ struct fcgi_conn *fconn;
+
+ int32_t id; /* stream ID */
+
+ uint32_t flags; /* Connection flags: FCGI_SF_* */
+ enum fcgi_strm_st state; /* FCGI stream state */
+ int proto_status; /* FCGI_PS_* */
+
+ struct h1m h1m; /* response parser state for H1 */
+
+ struct buffer rxbuf; /* receive buffer, always valid (buf_empty or real buffer) */
+
+ struct eb32_node by_id; /* place in fcgi_conn's streams_by_id */
+ struct wait_event *subs; /* Address of the wait_event the stream connector associated is waiting on */
+ struct list send_list; /* To be used when adding in fcgi_conn->send_list */
+ struct tasklet *shut_tl; /* deferred shutdown tasklet, to retry to close after we failed to by lack of space */
+};
+
+/* Flags representing all default FCGI parameters */
+#define FCGI_SP_CGI_GATEWAY 0x00000001
+#define FCGI_SP_DOC_ROOT 0x00000002
+#define FCGI_SP_SCRIPT_NAME 0x00000004
+#define FCGI_SP_PATH_INFO 0x00000008
+#define FCGI_SP_REQ_URI 0x00000010
+#define FCGI_SP_REQ_METH 0x00000020
+#define FCGI_SP_REQ_QS 0x00000040
+#define FCGI_SP_SRV_PORT 0x00000080
+#define FCGI_SP_SRV_PROTO 0x00000100
+#define FCGI_SP_SRV_NAME 0x00000200
+#define FCGI_SP_REM_ADDR 0x00000400
+#define FCGI_SP_REM_PORT 0x00000800
+#define FCGI_SP_SCRIPT_FILE 0x00001000
+#define FCGI_SP_PATH_TRANS 0x00002000
+#define FCGI_SP_CONT_LEN 0x00004000
+#define FCGI_SP_HTTPS 0x00008000
+#define FCGI_SP_SRV_SOFT 0x00010000
+#define FCGI_SP_MASK 0x0001FFFF
+#define FCGI_SP_URI_MASK (FCGI_SP_SCRIPT_NAME|FCGI_SP_PATH_INFO|FCGI_SP_REQ_QS)
+
+/* FCGI parameters used when PARAMS record is sent */
+struct fcgi_strm_params {
+ uint32_t mask;
+ struct ist docroot;
+ struct ist scriptname;
+ struct ist pathinfo;
+ struct ist meth;
+ struct ist uri;
+ struct ist vsn;
+ struct ist qs;
+ struct ist srv_name;
+ struct ist srv_port;
+ struct ist rem_addr;
+ struct ist rem_port;
+ struct ist cont_len;
+ struct ist srv_soft;
+ int https;
+ struct buffer *p;
+};
+
+/* Maximum amount of data we're OK with re-aligning for buffer optimizations */
+#define MAX_DATA_REALIGN 1024
+
+/* trace source and events */
+static void fcgi_trace(enum trace_level level, uint64_t mask,
+ const struct trace_source *src,
+ const struct ist where, const struct ist func,
+ const void *a1, const void *a2, const void *a3, const void *a4);
+
+/* The event representation is split like this :
+ * fconn - internal FCGI connection
+ * fstrm - internal FCGI stream
+ * strm - application layer
+ * rx - data receipt
+ * tx - data transmission
+ * rsp - response parsing
+ */
+static const struct trace_event fcgi_trace_events[] = {
+#define FCGI_EV_FCONN_NEW (1ULL << 0)
+ { .mask = FCGI_EV_FCONN_NEW, .name = "fconn_new", .desc = "new FCGI connection" },
+#define FCGI_EV_FCONN_RECV (1ULL << 1)
+ { .mask = FCGI_EV_FCONN_RECV, .name = "fconn_recv", .desc = "Rx on FCGI connection" },
+#define FCGI_EV_FCONN_SEND (1ULL << 2)
+ { .mask = FCGI_EV_FCONN_SEND, .name = "fconn_send", .desc = "Tx on FCGI connection" },
+#define FCGI_EV_FCONN_BLK (1ULL << 3)
+ { .mask = FCGI_EV_FCONN_BLK, .name = "fconn_blk", .desc = "FCGI connection blocked" },
+#define FCGI_EV_FCONN_WAKE (1ULL << 4)
+ { .mask = FCGI_EV_FCONN_WAKE, .name = "fconn_wake", .desc = "FCGI connection woken up" },
+#define FCGI_EV_FCONN_END (1ULL << 5)
+ { .mask = FCGI_EV_FCONN_END, .name = "fconn_end", .desc = "FCGI connection terminated" },
+#define FCGI_EV_FCONN_ERR (1ULL << 6)
+ { .mask = FCGI_EV_FCONN_ERR, .name = "fconn_err", .desc = "error on FCGI connection" },
+
+#define FCGI_EV_RX_FHDR (1ULL << 7)
+ { .mask = FCGI_EV_RX_FHDR, .name = "rx_fhdr", .desc = "FCGI record header received" },
+#define FCGI_EV_RX_RECORD (1ULL << 8)
+ { .mask = FCGI_EV_RX_RECORD, .name = "rx_record", .desc = "receipt of any FCGI record" },
+#define FCGI_EV_RX_EOI (1ULL << 9)
+ { .mask = FCGI_EV_RX_EOI, .name = "rx_eoi", .desc = "receipt of end of FCGI input" },
+#define FCGI_EV_RX_GETVAL (1ULL << 10)
+ { .mask = FCGI_EV_RX_GETVAL, .name = "rx_get_values", .desc = "receipt of FCGI GET_VALUES_RESULT record" },
+#define FCGI_EV_RX_STDOUT (1ULL << 11)
+ { .mask = FCGI_EV_RX_STDOUT, .name = "rx_stdout", .desc = "receipt of FCGI STDOUT record" },
+#define FCGI_EV_RX_STDERR (1ULL << 12)
+ { .mask = FCGI_EV_RX_STDERR, .name = "rx_stderr", .desc = "receipt of FCGI STDERR record" },
+#define FCGI_EV_RX_ENDREQ (1ULL << 13)
+ { .mask = FCGI_EV_RX_ENDREQ, .name = "rx_end_req", .desc = "receipt of FCGI END_REQUEST record" },
+
+#define FCGI_EV_TX_RECORD (1ULL << 14)
+ { .mask = FCGI_EV_TX_RECORD, .name = "tx_record", .desc = "transmission of any FCGI record" },
+#define FCGI_EV_TX_EOI (1ULL << 15)
+ { .mask = FCGI_EV_TX_EOI, .name = "tx_eoi", .desc = "transmission of FCGI end of input" },
+#define FCGI_EV_TX_BEGREQ (1ULL << 16)
+ { .mask = FCGI_EV_TX_BEGREQ, .name = "tx_begin_request", .desc = "transmission of FCGI BEGIN_REQUEST record" },
+#define FCGI_EV_TX_GETVAL (1ULL << 17)
+ { .mask = FCGI_EV_TX_GETVAL, .name = "tx_get_values", .desc = "transmission of FCGI GET_VALUES record" },
+#define FCGI_EV_TX_PARAMS (1ULL << 18)
+ { .mask = FCGI_EV_TX_PARAMS, .name = "tx_params", .desc = "transmission of FCGI PARAMS record" },
+#define FCGI_EV_TX_STDIN (1ULL << 19)
+ { .mask = FCGI_EV_TX_STDIN, .name = "tx_stding", .desc = "transmission of FCGI STDIN record" },
+#define FCGI_EV_TX_ABORT (1ULL << 20)
+ { .mask = FCGI_EV_TX_ABORT, .name = "tx_abort", .desc = "transmission of FCGI ABORT record" },
+
+#define FCGI_EV_RSP_DATA (1ULL << 21)
+ { .mask = FCGI_EV_RSP_DATA, .name = "rsp_data", .desc = "parse any data of H1 response" },
+#define FCGI_EV_RSP_EOM (1ULL << 22)
+ { .mask = FCGI_EV_RSP_EOM, .name = "rsp_eom", .desc = "reach the end of message of H1 response" },
+#define FCGI_EV_RSP_HDRS (1ULL << 23)
+ { .mask = FCGI_EV_RSP_HDRS, .name = "rsp_headers", .desc = "parse headers of H1 response" },
+#define FCGI_EV_RSP_BODY (1ULL << 24)
+ { .mask = FCGI_EV_RSP_BODY, .name = "rsp_body", .desc = "parse body part of H1 response" },
+#define FCGI_EV_RSP_TLRS (1ULL << 25)
+ { .mask = FCGI_EV_RSP_TLRS, .name = "rsp_trailerus", .desc = "parse trailers of H1 response" },
+
+#define FCGI_EV_FSTRM_NEW (1ULL << 26)
+ { .mask = FCGI_EV_FSTRM_NEW, .name = "fstrm_new", .desc = "new FCGI stream" },
+#define FCGI_EV_FSTRM_BLK (1ULL << 27)
+ { .mask = FCGI_EV_FSTRM_BLK, .name = "fstrm_blk", .desc = "FCGI stream blocked" },
+#define FCGI_EV_FSTRM_END (1ULL << 28)
+ { .mask = FCGI_EV_FSTRM_END, .name = "fstrm_end", .desc = "FCGI stream terminated" },
+#define FCGI_EV_FSTRM_ERR (1ULL << 29)
+ { .mask = FCGI_EV_FSTRM_ERR, .name = "fstrm_err", .desc = "error on FCGI stream" },
+
+#define FCGI_EV_STRM_NEW (1ULL << 30)
+ { .mask = FCGI_EV_STRM_NEW, .name = "strm_new", .desc = "app-layer stream creation" },
+#define FCGI_EV_STRM_RECV (1ULL << 31)
+ { .mask = FCGI_EV_STRM_RECV, .name = "strm_recv", .desc = "receiving data for stream" },
+#define FCGI_EV_STRM_SEND (1ULL << 32)
+ { .mask = FCGI_EV_STRM_SEND, .name = "strm_send", .desc = "sending data for stream" },
+#define FCGI_EV_STRM_FULL (1ULL << 33)
+ { .mask = FCGI_EV_STRM_FULL, .name = "strm_full", .desc = "stream buffer full" },
+#define FCGI_EV_STRM_WAKE (1ULL << 34)
+ { .mask = FCGI_EV_STRM_WAKE, .name = "strm_wake", .desc = "stream woken up" },
+#define FCGI_EV_STRM_SHUT (1ULL << 35)
+ { .mask = FCGI_EV_STRM_SHUT, .name = "strm_shut", .desc = "stream shutdown" },
+#define FCGI_EV_STRM_END (1ULL << 36)
+ { .mask = FCGI_EV_STRM_END, .name = "strm_end", .desc = "detaching app-layer stream" },
+#define FCGI_EV_STRM_ERR (1ULL << 37)
+ { .mask = FCGI_EV_STRM_ERR, .name = "strm_err", .desc = "stream error" },
+
+ { }
+};
+
+static const struct name_desc fcgi_trace_lockon_args[4] = {
+ /* arg1 */ { /* already used by the connection */ },
+ /* arg2 */ { .name="fstrm", .desc="FCGI stream" },
+ /* arg3 */ { },
+ /* arg4 */ { }
+};
+
+
+static const struct name_desc fcgi_trace_decoding[] = {
+#define FCGI_VERB_CLEAN 1
+ { .name="clean", .desc="only user-friendly stuff, generally suitable for level \"user\"" },
+#define FCGI_VERB_MINIMAL 2
+ { .name="minimal", .desc="report only fconn/fstrm state and flags, no real decoding" },
+#define FCGI_VERB_SIMPLE 3
+ { .name="simple", .desc="add request/response status line or htx info when available" },
+#define FCGI_VERB_ADVANCED 4
+ { .name="advanced", .desc="add header fields or record decoding when available" },
+#define FCGI_VERB_COMPLETE 5
+ { .name="complete", .desc="add full data dump when available" },
+ { /* end */ }
+};
+
+static struct trace_source trace_fcgi __read_mostly = {
+ .name = IST("fcgi"),
+ .desc = "FastCGI multiplexer",
+ .arg_def = TRC_ARG1_CONN, // TRACE()'s first argument is always a connection
+ .default_cb = fcgi_trace,
+ .known_events = fcgi_trace_events,
+ .lockon_args = fcgi_trace_lockon_args,
+ .decoding = fcgi_trace_decoding,
+ .report_events = ~0, // report everything by default
+};
+
+#define TRACE_SOURCE &trace_fcgi
+INITCALL1(STG_REGISTER, trace_register_source, TRACE_SOURCE);
+
+/* FCGI connection and stream pools */
+DECLARE_STATIC_POOL(pool_head_fcgi_conn, "fcgi_conn", sizeof(struct fcgi_conn));
+DECLARE_STATIC_POOL(pool_head_fcgi_strm, "fcgi_strm", sizeof(struct fcgi_strm));
+
+struct task *fcgi_timeout_task(struct task *t, void *context, unsigned int state);
+static int fcgi_process(struct fcgi_conn *fconn);
+/* fcgi_io_cb is exported to see it resolved in "show fd" */
+struct task *fcgi_io_cb(struct task *t, void *ctx, unsigned int state);
+static inline struct fcgi_strm *fcgi_conn_st_by_id(struct fcgi_conn *fconn, int id);
+struct task *fcgi_deferred_shut(struct task *t, void *ctx, unsigned int state);
+static struct fcgi_strm *fcgi_stconn_new(struct fcgi_conn *fconn, struct stconn *sc, struct session *sess);
+static void fcgi_strm_notify_recv(struct fcgi_strm *fstrm);
+static void fcgi_strm_notify_send(struct fcgi_strm *fstrm);
+static void fcgi_strm_alert(struct fcgi_strm *fstrm);
+static int fcgi_strm_send_abort(struct fcgi_conn *fconn, struct fcgi_strm *fstrm);
+
+/* a dummy closed endpoint */
+static const struct sedesc closed_ep = {
+ .sc = NULL,
+ .flags = SE_FL_DETACHED,
+};
+
+/* a dmumy management stream */
+static const struct fcgi_strm *fcgi_mgmt_stream = &(const struct fcgi_strm){
+ .sd = (struct sedesc*)&closed_ep,
+ .fconn = NULL,
+ .state = FCGI_SS_CLOSED,
+ .flags = FCGI_SF_NONE,
+ .id = 0,
+};
+
+/* and a dummy idle stream for use with any unknown stream */
+static const struct fcgi_strm *fcgi_unknown_stream = &(const struct fcgi_strm){
+ .sd = (struct sedesc*)&closed_ep,
+ .fconn = NULL,
+ .state = FCGI_SS_IDLE,
+ .flags = FCGI_SF_NONE,
+ .id = 0,
+};
+
+/* returns the stconn associated to the FCGI stream */
+static forceinline struct stconn *fcgi_strm_sc(const struct fcgi_strm *fstrm)
+{
+ return fstrm->sd->sc;
+}
+
+
+/* the FCGI traces always expect that arg1, if non-null, is of type connection
+ * (from which we can derive fconn), that arg2, if non-null, is of type fstrm,
+ * and that arg3, if non-null, is a htx for rx/tx headers.
+ */
+static void fcgi_trace(enum trace_level level, uint64_t mask, const struct trace_source *src,
+ const struct ist where, const struct ist func,
+ const void *a1, const void *a2, const void *a3, const void *a4)
+{
+ const struct connection *conn = a1;
+ struct fcgi_conn *fconn = conn ? conn->ctx : NULL;
+ const struct fcgi_strm *fstrm = a2;
+ const struct htx *htx = a3;
+ const size_t *val = a4;
+
+ if (!fconn)
+ fconn = (fstrm ? fstrm->fconn : NULL);
+
+ if (!fconn || src->verbosity < FCGI_VERB_CLEAN)
+ return;
+
+ /* Display the response state if fstrm is defined */
+ if (fstrm)
+ chunk_appendf(&trace_buf, " [rsp:%s]", h1m_state_str(fstrm->h1m.state));
+
+ if (src->verbosity == FCGI_VERB_CLEAN)
+ return;
+
+ /* Display the value to the 4th argument (level > STATE) */
+ if (src->level > TRACE_LEVEL_STATE && val)
+ chunk_appendf(&trace_buf, " - VAL=%lu", (long)*val);
+
+ /* Display status-line if possible (verbosity > MINIMAL) */
+ if (src->verbosity > FCGI_VERB_MINIMAL && htx && htx_nbblks(htx)) {
+ const struct htx_blk *blk = __htx_get_head_blk(htx);
+ const struct htx_sl *sl = htx_get_blk_ptr(htx, blk);
+ enum htx_blk_type type = htx_get_blk_type(blk);
+
+ if (type == HTX_BLK_REQ_SL || type == HTX_BLK_RES_SL)
+ chunk_appendf(&trace_buf, " - \"%.*s %.*s %.*s\"",
+ HTX_SL_P1_LEN(sl), HTX_SL_P1_PTR(sl),
+ HTX_SL_P2_LEN(sl), HTX_SL_P2_PTR(sl),
+ HTX_SL_P3_LEN(sl), HTX_SL_P3_PTR(sl));
+ }
+
+ /* Display fconn info and, if defined, fstrm info */
+ chunk_appendf(&trace_buf, " - fconn=%p(%s,0x%08x)", fconn, fconn_st_to_str(fconn->state), fconn->flags);
+ if (fstrm)
+ chunk_appendf(&trace_buf, " fstrm=%p(%d,%s,0x%08x)", fstrm, fstrm->id, fstrm_st_to_str(fstrm->state), fstrm->flags);
+
+ if (!fstrm || fstrm->id <= 0)
+ chunk_appendf(&trace_buf, " dsi=%d", fconn->dsi);
+ if (fconn->dsi >= 0 && (mask & FCGI_EV_RX_FHDR))
+ chunk_appendf(&trace_buf, " drt=%s", fcgi_rt_str(fconn->drt));
+
+ if (src->verbosity == FCGI_VERB_MINIMAL)
+ return;
+
+ /* Display mbuf and dbuf info (level > USER & verbosity > SIMPLE) */
+ if (src->level > TRACE_LEVEL_USER) {
+ if (src->verbosity == FCGI_VERB_COMPLETE ||
+ (src->verbosity == FCGI_VERB_ADVANCED && (mask & (FCGI_EV_FCONN_RECV|FCGI_EV_RX_RECORD))))
+ chunk_appendf(&trace_buf, " dbuf=%u@%p+%u/%u",
+ (unsigned int)b_data(&fconn->dbuf), b_orig(&fconn->dbuf),
+ (unsigned int)b_head_ofs(&fconn->dbuf), (unsigned int)b_size(&fconn->dbuf));
+ if (src->verbosity == FCGI_VERB_COMPLETE ||
+ (src->verbosity == FCGI_VERB_ADVANCED && (mask & (FCGI_EV_FCONN_SEND|FCGI_EV_TX_RECORD)))) {
+ struct buffer *hmbuf = br_head(fconn->mbuf);
+ struct buffer *tmbuf = br_tail(fconn->mbuf);
+
+ chunk_appendf(&trace_buf, " .mbuf=[%u..%u|%u],h=[%u@%p+%u/%u],t=[%u@%p+%u/%u]",
+ br_head_idx(fconn->mbuf), br_tail_idx(fconn->mbuf), br_size(fconn->mbuf),
+ (unsigned int)b_data(hmbuf), b_orig(hmbuf),
+ (unsigned int)b_head_ofs(hmbuf), (unsigned int)b_size(hmbuf),
+ (unsigned int)b_data(tmbuf), b_orig(tmbuf),
+ (unsigned int)b_head_ofs(tmbuf), (unsigned int)b_size(tmbuf));
+ }
+
+ if (fstrm && (src->verbosity == FCGI_VERB_COMPLETE ||
+ (src->verbosity == FCGI_VERB_ADVANCED && (mask & (FCGI_EV_STRM_RECV|FCGI_EV_RSP_DATA)))))
+ chunk_appendf(&trace_buf, " rxbuf=%u@%p+%u/%u",
+ (unsigned int)b_data(&fstrm->rxbuf), b_orig(&fstrm->rxbuf),
+ (unsigned int)b_head_ofs(&fstrm->rxbuf), (unsigned int)b_size(&fstrm->rxbuf));
+ }
+
+ /* Display htx info if defined (level > USER) */
+ if (src->level > TRACE_LEVEL_USER && htx) {
+ int full = 0;
+
+ /* Full htx info (level > STATE && verbosity > SIMPLE) */
+ if (src->level > TRACE_LEVEL_STATE) {
+ if (src->verbosity == FCGI_VERB_COMPLETE)
+ full = 1;
+ else if (src->verbosity == FCGI_VERB_ADVANCED && (mask & (FCGI_EV_RSP_HDRS|FCGI_EV_TX_PARAMS)))
+ full = 1;
+ }
+
+ chunk_memcat(&trace_buf, "\n\t", 2);
+ htx_dump(&trace_buf, htx, full);
+ }
+}
+
+/*****************************************************/
+/* functions below are for dynamic buffer management */
+/*****************************************************/
+
+/* Indicates whether or not the we may call the fcgi_recv() function to attempt
+ * to receive data into the buffer and/or demux pending data. The condition is
+ * a bit complex due to some API limits for now. The rules are the following :
+ * - if an error or a shutdown was detected on the connection and the buffer
+ * is empty, we must not attempt to receive
+ * - if the demux buf failed to be allocated, we must not try to receive and
+ * we know there is nothing pending
+ * - if no flag indicates a blocking condition, we may attempt to receive,
+ * regardless of whether the demux buffer is full or not, so that only
+ * de demux part decides whether or not to block. This is needed because
+ * the connection API indeed prevents us from re-enabling receipt that is
+ * already enabled in a polled state, so we must always immediately stop
+ * as soon as the demux can't proceed so as never to hit an end of read
+ * with data pending in the buffers.
+ * - otherwise must may not attempt
+ */
+static inline int fcgi_recv_allowed(const struct fcgi_conn *fconn)
+{
+ if (fconn->flags & (FCGI_CF_EOS|FCGI_CF_ERROR))
+ return 0;
+
+ if (b_data(&fconn->dbuf) == 0 && fconn->state == FCGI_CS_CLOSED)
+ return 0;
+
+ if (!(fconn->flags & FCGI_CF_DEM_DALLOC) &&
+ !(fconn->flags & FCGI_CF_DEM_BLOCK_ANY))
+ return 1;
+
+ return 0;
+}
+
+/* Restarts reading on the connection if it was not enabled */
+static inline void fcgi_conn_restart_reading(const struct fcgi_conn *fconn, int consider_buffer)
+{
+ if (!fcgi_recv_allowed(fconn))
+ return;
+ if ((!consider_buffer || !b_data(&fconn->dbuf)) &&
+ (fconn->wait_event.events & SUB_RETRY_RECV))
+ return;
+ tasklet_wakeup(fconn->wait_event.tasklet);
+}
+
+
+/* Tries to grab a buffer and to re-enable processing on mux <target>. The
+ * fcgi_conn flags are used to figure what buffer was requested. It returns 1 if
+ * the allocation succeeds, in which case the connection is woken up, or 0 if
+ * it's impossible to wake up and we prefer to be woken up later.
+ */
+static int fcgi_buf_available(void *target)
+{
+ struct fcgi_conn *fconn = target;
+ struct fcgi_strm *fstrm;
+
+ if ((fconn->flags & FCGI_CF_DEM_DALLOC) && b_alloc(&fconn->dbuf)) {
+ TRACE_STATE("unblocking fconn, dbuf allocated", FCGI_EV_FCONN_RECV|FCGI_EV_FCONN_BLK|FCGI_EV_FCONN_WAKE, fconn->conn);
+ fconn->flags &= ~FCGI_CF_DEM_DALLOC;
+ fcgi_conn_restart_reading(fconn, 1);
+ return 1;
+ }
+
+ if ((fconn->flags & FCGI_CF_MUX_MALLOC) && b_alloc(br_tail(fconn->mbuf))) {
+ TRACE_STATE("unblocking fconn, mbuf allocated", FCGI_EV_FCONN_SEND|FCGI_EV_FCONN_BLK|FCGI_EV_FCONN_WAKE, fconn->conn);
+ fconn->flags &= ~FCGI_CF_MUX_MALLOC;
+ if (fconn->flags & FCGI_CF_DEM_MROOM) {
+ fconn->flags &= ~FCGI_CF_DEM_MROOM;
+ fcgi_conn_restart_reading(fconn, 1);
+ }
+ return 1;
+ }
+
+ if ((fconn->flags & FCGI_CF_DEM_SALLOC) &&
+ (fstrm = fcgi_conn_st_by_id(fconn, fconn->dsi)) && fcgi_strm_sc(fstrm) &&
+ b_alloc(&fstrm->rxbuf)) {
+ TRACE_STATE("unblocking fstrm, rxbuf allocated", FCGI_EV_STRM_RECV|FCGI_EV_FSTRM_BLK|FCGI_EV_STRM_WAKE, fconn->conn, fstrm);
+ fconn->flags &= ~FCGI_CF_DEM_SALLOC;
+ fcgi_conn_restart_reading(fconn, 1);
+ fcgi_strm_notify_recv(fstrm);
+ return 1;
+ }
+
+ return 0;
+}
+
+static inline struct buffer *fcgi_get_buf(struct fcgi_conn *fconn, struct buffer *bptr)
+{
+ struct buffer *buf = NULL;
+
+ if (likely(!LIST_INLIST(&fconn->buf_wait.list)) &&
+ unlikely((buf = b_alloc(bptr)) == NULL)) {
+ fconn->buf_wait.target = fconn;
+ fconn->buf_wait.wakeup_cb = fcgi_buf_available;
+ LIST_APPEND(&th_ctx->buffer_wq, &fconn->buf_wait.list);
+ }
+ return buf;
+}
+
+static inline void fcgi_release_buf(struct fcgi_conn *fconn, struct buffer *bptr)
+{
+ if (bptr->size) {
+ b_free(bptr);
+ offer_buffers(NULL, 1);
+ }
+}
+
+static inline void fcgi_release_mbuf(struct fcgi_conn *fconn)
+{
+ struct buffer *buf;
+ unsigned int count = 0;
+
+ while (b_size(buf = br_head_pick(fconn->mbuf))) {
+ b_free(buf);
+ count++;
+ }
+ if (count)
+ offer_buffers(NULL, count);
+}
+
+/* Returns the number of allocatable outgoing streams for the connection taking
+ * the number reserved streams into account.
+ */
+static inline int fcgi_streams_left(const struct fcgi_conn *fconn)
+{
+ int ret;
+
+ ret = (unsigned int)(0x7FFF - fconn->max_id) - fconn->nb_reserved - 1;
+ if (ret < 0)
+ ret = 0;
+ return ret;
+}
+
+/* Returns the number of streams in use on a connection to figure if it's
+ * idle or not. We check nb_sc and not nb_streams as the caller will want
+ * to know if it was the last one after a detach().
+ */
+static int fcgi_used_streams(struct connection *conn)
+{
+ struct fcgi_conn *fconn = conn->ctx;
+
+ return fconn->nb_sc;
+}
+
+/* Returns the number of concurrent streams available on the connection */
+static int fcgi_avail_streams(struct connection *conn)
+{
+ struct server *srv = objt_server(conn->target);
+ struct fcgi_conn *fconn = conn->ctx;
+ int ret1, ret2;
+
+ /* Don't open new stream if the connection is closed */
+ if (fconn->state == FCGI_CS_CLOSED)
+ return 0;
+
+ /* May be negative if this setting has changed */
+ ret1 = (fconn->streams_limit - fconn->nb_streams);
+
+ /* we must also consider the limit imposed by stream IDs */
+ ret2 = fcgi_streams_left(fconn);
+ ret1 = MIN(ret1, ret2);
+ if (ret1 > 0 && srv && srv->max_reuse >= 0) {
+ ret2 = ((fconn->stream_cnt <= srv->max_reuse) ? srv->max_reuse - fconn->stream_cnt + 1: 0);
+ ret1 = MIN(ret1, ret2);
+ }
+ return ret1;
+}
+
+/*****************************************************************/
+/* functions below are dedicated to the mux setup and management */
+/*****************************************************************/
+
+/* Initializes the mux once it's attached. Only outgoing connections are
+ * supported. So the context is already initialized before installing the
+ * mux. <input> is always used as Input buffer and may contain data. It is the
+ * caller responsibility to not reuse it anymore. Returns < 0 on error.
+ */
+static int fcgi_init(struct connection *conn, struct proxy *px, struct session *sess,
+ struct buffer *input)
+{
+ struct fcgi_conn *fconn;
+ struct fcgi_strm *fstrm;
+ struct fcgi_app *app = get_px_fcgi_app(px);
+ struct task *t = NULL;
+ void *conn_ctx = conn->ctx;
+
+ TRACE_ENTER(FCGI_EV_FSTRM_NEW);
+
+ if (!app) {
+ TRACE_ERROR("No FCGI app found, don't create fconn", FCGI_EV_FCONN_NEW|FCGI_EV_FCONN_END|FCGI_EV_FCONN_ERR);
+ goto fail_conn;
+ }
+
+ fconn = pool_alloc(pool_head_fcgi_conn);
+ if (!fconn) {
+ TRACE_ERROR("fconn allocation failure", FCGI_EV_FCONN_NEW|FCGI_EV_FCONN_END|FCGI_EV_FCONN_ERR);
+ goto fail_conn;
+ }
+
+ fconn->shut_timeout = fconn->timeout = px->timeout.server;
+ if (tick_isset(px->timeout.serverfin))
+ fconn->shut_timeout = px->timeout.serverfin;
+
+ fconn->flags = FCGI_CF_NONE;
+
+ /* Retrieve useful info from the FCGI app */
+ if (app->flags & FCGI_APP_FL_KEEP_CONN)
+ fconn->flags |= FCGI_CF_KEEP_CONN;
+ if (app->flags & FCGI_APP_FL_GET_VALUES)
+ fconn->flags |= FCGI_CF_GET_VALUES;
+ if (app->flags & FCGI_APP_FL_MPXS_CONNS)
+ fconn->flags |= FCGI_CF_MPXS_CONNS;
+
+ fconn->proxy = px;
+ fconn->app = app;
+ fconn->task = NULL;
+ if (tick_isset(fconn->timeout)) {
+ t = task_new_here();
+ if (!t) {
+ TRACE_ERROR("fconn task allocation failure", FCGI_EV_FCONN_NEW|FCGI_EV_FCONN_END|FCGI_EV_FCONN_ERR);
+ goto fail;
+ }
+
+ fconn->task = t;
+ t->process = fcgi_timeout_task;
+ t->context = fconn;
+ t->expire = tick_add(now_ms, fconn->timeout);
+ }
+
+ fconn->wait_event.tasklet = tasklet_new();
+ if (!fconn->wait_event.tasklet)
+ goto fail;
+ fconn->wait_event.tasklet->process = fcgi_io_cb;
+ fconn->wait_event.tasklet->context = fconn;
+ fconn->wait_event.events = 0;
+
+ /* Initialise the context. */
+ fconn->state = FCGI_CS_INIT;
+ fconn->conn = conn;
+ fconn->streams_limit = app->maxreqs;
+ fconn->max_id = -1;
+ fconn->nb_streams = 0;
+ fconn->nb_sc = 0;
+ fconn->nb_reserved = 0;
+ fconn->stream_cnt = 0;
+
+ fconn->dbuf = *input;
+ fconn->dsi = -1;
+
+ br_init(fconn->mbuf, sizeof(fconn->mbuf) / sizeof(fconn->mbuf[0]));
+ fconn->streams_by_id = EB_ROOT;
+ LIST_INIT(&fconn->send_list);
+ LIST_INIT(&fconn->buf_wait.list);
+
+ conn->ctx = fconn;
+
+ if (t)
+ task_queue(t);
+
+ /* FIXME: this is temporary, for outgoing connections we need to
+ * immediately allocate a stream until the code is modified so that the
+ * caller calls ->attach(). For now the outgoing sc is stored as
+ * conn->ctx by the caller and saved in conn_ctx.
+ */
+ fstrm = fcgi_stconn_new(fconn, conn_ctx, sess);
+ if (!fstrm)
+ goto fail;
+
+
+ /* Repare to read something */
+ fcgi_conn_restart_reading(fconn, 1);
+ TRACE_LEAVE(FCGI_EV_FCONN_NEW, conn);
+ return 0;
+
+ fail:
+ task_destroy(t);
+ tasklet_free(fconn->wait_event.tasklet);
+ pool_free(pool_head_fcgi_conn, fconn);
+ fail_conn:
+ conn->ctx = conn_ctx; // restore saved ctx
+ TRACE_DEVEL("leaving in error", FCGI_EV_FCONN_NEW|FCGI_EV_FCONN_END|FCGI_EV_FCONN_ERR);
+ return -1;
+}
+
+/* Returns the next allocatable outgoing stream ID for the FCGI connection, or
+ * -1 if no more is allocatable.
+ */
+static inline int32_t fcgi_conn_get_next_sid(const struct fcgi_conn *fconn)
+{
+ int32_t id = (fconn->max_id + 1) | 1;
+
+ if ((id & 0x80000000U))
+ id = -1;
+ return id;
+}
+
+/* Returns the stream associated with id <id> or NULL if not found */
+static inline struct fcgi_strm *fcgi_conn_st_by_id(struct fcgi_conn *fconn, int id)
+{
+ struct eb32_node *node;
+
+ if (id == 0)
+ return (struct fcgi_strm *)fcgi_mgmt_stream;
+
+ if (id > fconn->max_id)
+ return (struct fcgi_strm *)fcgi_unknown_stream;
+
+ node = eb32_lookup(&fconn->streams_by_id, id);
+ if (!node)
+ return (struct fcgi_strm *)fcgi_unknown_stream;
+ return container_of(node, struct fcgi_strm, by_id);
+}
+
+
+/* Release function. This one should be called to free all resources allocated
+ * to the mux.
+ */
+static void fcgi_release(struct fcgi_conn *fconn)
+{
+ struct connection *conn = fconn->conn;
+
+ TRACE_POINT(FCGI_EV_FCONN_END);
+
+ if (LIST_INLIST(&fconn->buf_wait.list))
+ LIST_DEL_INIT(&fconn->buf_wait.list);
+
+ fcgi_release_buf(fconn, &fconn->dbuf);
+ fcgi_release_mbuf(fconn);
+
+ if (fconn->task) {
+ fconn->task->context = NULL;
+ task_wakeup(fconn->task, TASK_WOKEN_OTHER);
+ fconn->task = NULL;
+ }
+ tasklet_free(fconn->wait_event.tasklet);
+ if (conn && fconn->wait_event.events != 0)
+ conn->xprt->unsubscribe(conn, conn->xprt_ctx, fconn->wait_event.events,
+ &fconn->wait_event);
+
+ pool_free(pool_head_fcgi_conn, fconn);
+
+ if (conn) {
+ conn->mux = NULL;
+ conn->ctx = NULL;
+ TRACE_DEVEL("freeing conn", FCGI_EV_FCONN_END, conn);
+
+ conn_stop_tracking(conn);
+ conn_full_close(conn);
+ if (conn->destroy_cb)
+ conn->destroy_cb(conn);
+ conn_free(conn);
+ }
+}
+
+/* Detect a pending read0 for a FCGI connection. It happens if a read0 is
+ * pending on the connection AND if there is no more data in the demux
+ * buffer. The function returns 1 to report a read0 or 0 otherwise.
+ */
+static int fcgi_conn_read0_pending(struct fcgi_conn *fconn)
+{
+ if ((fconn->flags & FCGI_CF_EOS) && !b_data(&fconn->dbuf))
+ return 1;
+ return 0;
+}
+
+
+/* Returns true if the FCGI connection must be release */
+static inline int fcgi_conn_is_dead(struct fcgi_conn *fconn)
+{
+ if (eb_is_empty(&fconn->streams_by_id) && /* don't close if streams exist */
+ (!(fconn->flags & FCGI_CF_KEEP_CONN) || /* don't keep the connection alive */
+ (fconn->flags & FCGI_CF_ERROR) || /* errors close immediately */
+ (fconn->state == FCGI_CS_CLOSED && !fconn->task) ||/* a timeout stroke earlier */
+ (!(fconn->conn->owner)) || /* Nobody's left to take care of the connection, drop it now */
+ (!br_data(fconn->mbuf) && /* mux buffer empty, also process clean events below */
+ (fconn->flags & FCGI_CF_EOS))))
+ return 1;
+ return 0;
+}
+
+
+/********************************************************/
+/* functions below are for the FCGI protocol processing */
+/********************************************************/
+
+/* Marks an error on the stream. */
+static inline void fcgi_strm_error(struct fcgi_strm *fstrm)
+{
+ if (fstrm->id && fstrm->state != FCGI_SS_ERROR) {
+ TRACE_POINT(FCGI_EV_FSTRM_ERR, fstrm->fconn->conn, fstrm);
+ if (fstrm->state < FCGI_SS_ERROR) {
+ fstrm->state = FCGI_SS_ERROR;
+ TRACE_STATE("switching to ERROR", FCGI_EV_FSTRM_ERR, fstrm->fconn->conn, fstrm);
+ }
+ se_fl_set_error(fstrm->sd);
+ }
+}
+
+/* Attempts to notify the data layer of recv availability */
+static void fcgi_strm_notify_recv(struct fcgi_strm *fstrm)
+{
+ if (fstrm->subs && (fstrm->subs->events & SUB_RETRY_RECV)) {
+ TRACE_POINT(FCGI_EV_STRM_WAKE, fstrm->fconn->conn, fstrm);
+ tasklet_wakeup(fstrm->subs->tasklet);
+ fstrm->subs->events &= ~SUB_RETRY_RECV;
+ if (!fstrm->subs->events)
+ fstrm->subs = NULL;
+ }
+}
+
+/* Attempts to notify the data layer of send availability */
+static void fcgi_strm_notify_send(struct fcgi_strm *fstrm)
+{
+ if (fstrm->subs && (fstrm->subs->events & SUB_RETRY_SEND)) {
+ TRACE_POINT(FCGI_EV_STRM_WAKE, fstrm->fconn->conn, fstrm);
+ fstrm->flags |= FCGI_SF_NOTIFIED;
+ tasklet_wakeup(fstrm->subs->tasklet);
+ fstrm->subs->events &= ~SUB_RETRY_SEND;
+ if (!fstrm->subs->events)
+ fstrm->subs = NULL;
+ }
+ else if (fstrm->flags & (FCGI_SF_WANT_SHUTR | FCGI_SF_WANT_SHUTW)) {
+ TRACE_POINT(FCGI_EV_STRM_WAKE, fstrm->fconn->conn, fstrm);
+ tasklet_wakeup(fstrm->shut_tl);
+ }
+}
+
+/* Alerts the data layer, trying to wake it up by all means, following
+ * this sequence :
+ * - if the fcgi stream' data layer is subscribed to recv, then it's woken up
+ * for recv
+ * - if its subscribed to send, then it's woken up for send
+ * - if it was subscribed to neither, its ->wake() callback is called
+ * It is safe to call this function with a closed stream which doesn't have a
+ * stream connector anymore.
+ */
+static void fcgi_strm_alert(struct fcgi_strm *fstrm)
+{
+ TRACE_POINT(FCGI_EV_STRM_WAKE, fstrm->fconn->conn, fstrm);
+ if (fstrm->subs ||
+ (fstrm->flags & (FCGI_SF_WANT_SHUTR|FCGI_SF_WANT_SHUTW))) {
+ fcgi_strm_notify_recv(fstrm);
+ fcgi_strm_notify_send(fstrm);
+ }
+ else if (fcgi_strm_sc(fstrm) && fcgi_strm_sc(fstrm)->app_ops->wake != NULL) {
+ TRACE_POINT(FCGI_EV_STRM_WAKE, fstrm->fconn->conn, fstrm);
+ fcgi_strm_sc(fstrm)->app_ops->wake(fcgi_strm_sc(fstrm));
+ }
+}
+
+/* Writes the 16-bit record size <len> at address <record> */
+static inline void fcgi_set_record_size(void *record, uint16_t len)
+{
+ uint8_t *out = (record + 4);
+
+ *out = (len >> 8);
+ *(out + 1) = (len & 0xff);
+}
+
+/* Writes the 16-bit stream id <id> at address <record> */
+static inline void fcgi_set_record_id(void *record, uint16_t id)
+{
+ uint8_t *out = (record + 2);
+
+ *out = (id >> 8);
+ *(out + 1) = (id & 0xff);
+}
+
+/* Marks a FCGI stream as CLOSED and decrement the number of active streams for
+ * its connection if the stream was not yet closed. Please use this exclusively
+ * before closing a stream to ensure stream count is well maintained.
+ */
+static inline void fcgi_strm_close(struct fcgi_strm *fstrm)
+{
+ if (fstrm->state != FCGI_SS_CLOSED) {
+ TRACE_ENTER(FCGI_EV_FSTRM_END, fstrm->fconn->conn, fstrm);
+ fstrm->fconn->nb_streams--;
+ if (!fstrm->id)
+ fstrm->fconn->nb_reserved--;
+ if (fcgi_strm_sc(fstrm)) {
+ if (!se_fl_test(fstrm->sd, SE_FL_EOS) && !b_data(&fstrm->rxbuf))
+ fcgi_strm_notify_recv(fstrm);
+ }
+ fstrm->state = FCGI_SS_CLOSED;
+ TRACE_STATE("switching to CLOSED", FCGI_EV_FSTRM_END, fstrm->fconn->conn, fstrm);
+ TRACE_LEAVE(FCGI_EV_FSTRM_END, fstrm->fconn->conn, fstrm);
+ }
+}
+
+/* Detaches a FCGI stream from its FCGI connection and releases it to the
+ * fcgi_strm pool.
+ */
+static void fcgi_strm_destroy(struct fcgi_strm *fstrm)
+{
+ struct connection *conn = fstrm->fconn->conn;
+
+ TRACE_ENTER(FCGI_EV_FSTRM_END, conn, fstrm);
+
+ fcgi_strm_close(fstrm);
+ eb32_delete(&fstrm->by_id);
+ if (b_size(&fstrm->rxbuf)) {
+ b_free(&fstrm->rxbuf);
+ offer_buffers(NULL, 1);
+ }
+ if (fstrm->subs)
+ fstrm->subs->events = 0;
+ /* There's no need to explicitly call unsubscribe here, the only
+ * reference left would be in the fconn send_list/fctl_list, and if
+ * we're in it, we're getting out anyway
+ */
+ LIST_DEL_INIT(&fstrm->send_list);
+ tasklet_free(fstrm->shut_tl);
+ BUG_ON(fstrm->sd && !se_fl_test(fstrm->sd, SE_FL_ORPHAN));
+ sedesc_free(fstrm->sd);
+ pool_free(pool_head_fcgi_strm, fstrm);
+
+ TRACE_LEAVE(FCGI_EV_FSTRM_END, conn);
+}
+
+/* Allocates a new stream <id> for connection <fconn> and adds it into fconn's
+ * stream tree. In case of error, nothing is added and NULL is returned. The
+ * causes of errors can be any failed memory allocation. The caller is
+ * responsible for checking if the connection may support an extra stream prior
+ * to calling this function.
+ */
+static struct fcgi_strm *fcgi_strm_new(struct fcgi_conn *fconn, int id)
+{
+ struct fcgi_strm *fstrm;
+
+ TRACE_ENTER(FCGI_EV_FSTRM_NEW, fconn->conn);
+
+ fstrm = pool_alloc(pool_head_fcgi_strm);
+ if (!fstrm) {
+ TRACE_ERROR("fstrm allocation failure", FCGI_EV_FSTRM_NEW|FCGI_EV_FSTRM_ERR|FCGI_EV_FSTRM_END, fconn->conn);
+ goto out;
+ }
+
+ fstrm->shut_tl = tasklet_new();
+ if (!fstrm->shut_tl) {
+ TRACE_ERROR("fstrm shut tasklet allocation failure", FCGI_EV_FSTRM_NEW|FCGI_EV_FSTRM_ERR|FCGI_EV_FSTRM_END, fconn->conn);
+ pool_free(pool_head_fcgi_strm, fstrm);
+ goto out;
+ }
+ fstrm->subs = NULL;
+ fstrm->shut_tl->process = fcgi_deferred_shut;
+ fstrm->shut_tl->context = fstrm;
+ LIST_INIT(&fstrm->send_list);
+ fstrm->fconn = fconn;
+ fstrm->sd = NULL;
+ fstrm->flags = FCGI_SF_NONE;
+ fstrm->proto_status = 0;
+ fstrm->state = FCGI_SS_IDLE;
+ fstrm->rxbuf = BUF_NULL;
+
+ h1m_init_res(&fstrm->h1m);
+ fstrm->h1m.err_pos = -1; // don't care about errors on the request path
+ fstrm->h1m.flags |= (H1_MF_NO_PHDR|H1_MF_CLEAN_CONN_HDR);
+
+ fstrm->by_id.key = fstrm->id = id;
+ if (id > 0)
+ fconn->max_id = id;
+ else
+ fconn->nb_reserved++;
+
+ eb32_insert(&fconn->streams_by_id, &fstrm->by_id);
+ fconn->nb_streams++;
+ fconn->stream_cnt++;
+
+ TRACE_LEAVE(FCGI_EV_FSTRM_NEW, fconn->conn, fstrm);
+ return fstrm;
+
+ out:
+ TRACE_DEVEL("leaving in error", FCGI_EV_FSTRM_NEW|FCGI_EV_FSTRM_ERR|FCGI_EV_FSTRM_END, fconn->conn);
+ return NULL;
+}
+
+/* Allocates a new stream associated to stream connector <sc> on the FCGI connection
+ * <fconn> and returns it, or NULL in case of memory allocation error or if the
+ * highest possible stream ID was reached.
+ */
+static struct fcgi_strm *fcgi_stconn_new(struct fcgi_conn *fconn, struct stconn *sc,
+ struct session *sess)
+{
+ struct fcgi_strm *fstrm = NULL;
+
+ TRACE_ENTER(FCGI_EV_FSTRM_NEW, fconn->conn);
+ if (fconn->nb_streams >= fconn->streams_limit) {
+ TRACE_ERROR("streams_limit reached", FCGI_EV_FSTRM_NEW|FCGI_EV_FSTRM_END|FCGI_EV_FSTRM_ERR, fconn->conn);
+ goto out;
+ }
+
+ if (fcgi_streams_left(fconn) < 1) {
+ TRACE_ERROR("!streams_left", FCGI_EV_FSTRM_NEW|FCGI_EV_FSTRM_END|FCGI_EV_FSTRM_ERR, fconn->conn);
+ goto out;
+ }
+
+ /* Defer choosing the ID until we send the first message to create the stream */
+ fstrm = fcgi_strm_new(fconn, 0);
+ if (!fstrm) {
+ TRACE_ERROR("fstream allocation failure", FCGI_EV_FSTRM_NEW|FCGI_EV_FSTRM_END|FCGI_EV_FSTRM_ERR, fconn->conn);
+ goto out;
+ }
+ if (sc_attach_mux(sc, fstrm, fconn->conn) < 0)
+ goto out;
+ fstrm->sd = sc->sedesc;
+ fstrm->sess = sess;
+ fconn->nb_sc++;
+
+ TRACE_LEAVE(FCGI_EV_FSTRM_NEW, fconn->conn, fstrm);
+ return fstrm;
+
+ out:
+ TRACE_DEVEL("leaving on error", FCGI_EV_FSTRM_NEW|FCGI_EV_FSTRM_END|FCGI_EV_FSTRM_ERR, fconn->conn);
+ fcgi_strm_destroy(fstrm);
+ return NULL;
+}
+
+/* Wakes a specific stream and assign its stream connector some SE_FL_* flags among
+ * SE_FL_ERR_PENDING and SE_FL_ERROR if needed. The stream's state is
+ * automatically updated accordingly. If the stream is orphaned, it is
+ * destroyed.
+ */
+static void fcgi_strm_wake_one_stream(struct fcgi_strm *fstrm)
+{
+ struct fcgi_conn *fconn = fstrm->fconn;
+
+ TRACE_ENTER(FCGI_EV_STRM_WAKE, fconn->conn, fstrm);
+
+ if (!fcgi_strm_sc(fstrm)) {
+ /* this stream was already orphaned */
+ fcgi_strm_destroy(fstrm);
+ TRACE_DEVEL("leaving with no fstrm", FCGI_EV_STRM_WAKE, fconn->conn);
+ return;
+ }
+
+ if (fcgi_conn_read0_pending(fconn)) {
+ if (fstrm->state == FCGI_SS_OPEN) {
+ fstrm->state = FCGI_SS_HREM;
+ TRACE_STATE("switching to HREM", FCGI_EV_STRM_WAKE|FCGI_EV_FSTRM_END, fconn->conn, fstrm);
+ }
+ else if (fstrm->state == FCGI_SS_HLOC)
+ fcgi_strm_close(fstrm);
+ }
+
+ if (fconn->state == FCGI_CS_CLOSED || (fconn->flags & (FCGI_CF_ERR_PENDING|FCGI_CF_ERROR))) {
+ se_fl_set_error(fstrm->sd);
+
+ if (fstrm->state < FCGI_SS_ERROR) {
+ fstrm->state = FCGI_SS_ERROR;
+ TRACE_STATE("switching to ERROR", FCGI_EV_STRM_WAKE|FCGI_EV_FSTRM_END, fconn->conn, fstrm);
+ }
+ }
+
+ fcgi_strm_alert(fstrm);
+
+ TRACE_LEAVE(FCGI_EV_STRM_WAKE, fconn->conn, fstrm);
+}
+
+/* Wakes unassigned streams (ID == 0) attached to the connection. */
+static void fcgi_wake_unassigned_streams(struct fcgi_conn *fconn)
+{
+ struct eb32_node *node;
+ struct fcgi_strm *fstrm;
+
+ node = eb32_lookup(&fconn->streams_by_id, 0);
+ while (node) {
+ fstrm = container_of(node, struct fcgi_strm, by_id);
+ if (fstrm->id > 0)
+ break;
+ node = eb32_next(node);
+ fcgi_strm_wake_one_stream(fstrm);
+ }
+}
+
+/* Wakes the streams attached to the connection, whose id is greater than <last>
+ * or unassigned.
+ */
+static void fcgi_wake_some_streams(struct fcgi_conn *fconn, int last)
+{
+ struct eb32_node *node;
+ struct fcgi_strm *fstrm;
+
+ TRACE_ENTER(FCGI_EV_STRM_WAKE, fconn->conn);
+
+ /* Wake all streams with ID > last */
+ node = eb32_lookup_ge(&fconn->streams_by_id, last + 1);
+ while (node) {
+ fstrm = container_of(node, struct fcgi_strm, by_id);
+ node = eb32_next(node);
+ fcgi_strm_wake_one_stream(fstrm);
+ }
+ fcgi_wake_unassigned_streams(fconn);
+
+ TRACE_LEAVE(FCGI_EV_STRM_WAKE, fconn->conn);
+}
+
+static int fcgi_set_default_param(struct fcgi_conn *fconn, struct fcgi_strm *fstrm,
+ struct htx *htx, struct htx_sl *sl,
+ struct fcgi_strm_params *params)
+{
+ struct connection *cli_conn = objt_conn(fstrm->sess->origin);
+ const struct sockaddr_storage *src = (sc_check(fcgi_strm_sc(fstrm)) ? conn_src(fconn->conn) : sc_src(sc_opposite(fcgi_strm_sc(fstrm))));
+ const struct sockaddr_storage *dst = (sc_check(fcgi_strm_sc(fstrm)) ? conn_dst(fconn->conn) : sc_dst(sc_opposite(fcgi_strm_sc(fstrm))));
+ struct ist p;
+
+ if (!sl)
+ goto error;
+
+ if (!(params->mask & FCGI_SP_DOC_ROOT))
+ params->docroot = fconn->app->docroot;
+
+ if (!(params->mask & FCGI_SP_REQ_METH)) {
+ p = htx_sl_req_meth(sl);
+ params->meth = ist2(b_tail(params->p), p.len);
+ chunk_istcat(params->p, p);
+ }
+ if (!(params->mask & FCGI_SP_REQ_URI)) {
+ p = h1_get_uri(sl);
+ params->uri = ist2(b_tail(params->p), p.len);
+ chunk_istcat(params->p, p);
+ }
+ if (!(params->mask & FCGI_SP_SRV_PROTO)) {
+ p = htx_sl_req_vsn(sl);
+ params->vsn = ist2(b_tail(params->p), p.len);
+ chunk_istcat(params->p, p);
+ }
+ if (!(params->mask & FCGI_SP_SRV_PORT)) {
+ char *end;
+ int port = 0;
+ if (dst)
+ port = get_host_port(dst);
+ end = ultoa_o(port, b_tail(params->p), b_room(params->p));
+ if (!end)
+ goto error;
+ params->srv_port = ist2(b_tail(params->p), end - b_tail(params->p));
+ params->p->data += params->srv_port.len;
+ }
+ if (!(params->mask & FCGI_SP_SRV_NAME)) {
+ /* If no Host header found, use the server address to fill
+ * srv_name */
+ if (!istlen(params->srv_name)) {
+ char *ptr = NULL;
+
+ if (dst)
+ if (addr_to_str(dst, b_tail(params->p), b_room(params->p)) != -1)
+ ptr = b_tail(params->p);
+ if (ptr) {
+ params->srv_name = ist(ptr);
+ params->p->data += params->srv_name.len;
+ }
+ }
+ }
+ if (!(params->mask & FCGI_SP_REM_ADDR)) {
+ char *ptr = NULL;
+
+ if (src)
+ if (addr_to_str(src, b_tail(params->p), b_room(params->p)) != -1)
+ ptr = b_tail(params->p);
+ if (ptr) {
+ params->rem_addr = ist(ptr);
+ params->p->data += params->rem_addr.len;
+ }
+ }
+ if (!(params->mask & FCGI_SP_REM_PORT)) {
+ char *end;
+ int port = 0;
+ if (src)
+ port = get_host_port(src);
+ end = ultoa_o(port, b_tail(params->p), b_room(params->p));
+ if (!end)
+ goto error;
+ params->rem_port = ist2(b_tail(params->p), end - b_tail(params->p));
+ params->p->data += params->rem_port.len;
+ }
+ if (!(params->mask & FCGI_SP_CONT_LEN)) {
+ struct htx_blk *blk;
+ enum htx_blk_type type;
+ char *end;
+ size_t len = 0;
+
+ for (blk = htx_get_head_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
+ type = htx_get_blk_type(blk);
+
+ if (type == HTX_BLK_TLR || type == HTX_BLK_EOT)
+ break;
+ if (type == HTX_BLK_DATA)
+ len += htx_get_blksz(blk);
+ }
+ end = ultoa_o(len, b_tail(params->p), b_room(params->p));
+ if (!end)
+ goto error;
+ params->cont_len = ist2(b_tail(params->p), end - b_tail(params->p));
+ params->p->data += params->cont_len.len;
+ }
+
+ if (!(params->mask & FCGI_SP_HTTPS)) {
+ if (cli_conn)
+ params->https = conn_is_ssl(cli_conn);
+ }
+
+ if ((params->mask & FCGI_SP_URI_MASK) != FCGI_SP_URI_MASK) {
+ /* one of scriptname, pathinfo or query_string is no set */
+ struct http_uri_parser parser = http_uri_parser_init(params->uri);
+ struct ist path = http_parse_path(&parser);
+ int len;
+
+ /* No scrit_name set but no valid path ==> error */
+ if (!(params->mask & FCGI_SP_SCRIPT_NAME) && !istlen(path))
+ goto error;
+
+ /* If there is a query-string, Set it if not already set */
+ if (!(params->mask & FCGI_SP_REQ_QS)) {
+ struct ist qs = istfind(path, '?');
+
+ /* Update the path length */
+ path.len -= qs.len;
+
+ /* Set the query-string skipping the '?', if any */
+ if (istlen(qs))
+ params->qs = istnext(qs);
+ }
+
+ /* If the script_name is set, don't try to deduce the path_info
+ * too. The opposite is not true.
+ */
+ if (params->mask & FCGI_SP_SCRIPT_NAME) {
+ params->mask |= FCGI_SP_PATH_INFO;
+ goto end;
+ }
+
+ /* Decode the path. it must first be copied to keep the URI
+ * untouched.
+ */
+ chunk_istcat(params->p, path);
+ path.ptr = b_tail(params->p) - path.len;
+ len = url_decode(ist0(path), 0);
+ if (len < 0)
+ goto error;
+ path.len = len;
+
+ /* script_name not set, preset it with the path for now */
+ params->scriptname = path;
+
+ /* If there is no regex to match the pathinfo, just to the last
+ * part and see if the index must be used.
+ */
+ if (!fconn->app->pathinfo_re)
+ goto check_index;
+
+ /* If some special characters are found in the decoded path (\n
+ * or \0), the PATH_INFO regex cannot match. This is theoretically
+ * valid, but probably unexpected, to have such characters. So,
+ * to avoid any surprises, an error is triggered in this
+ * case.
+ */
+ if (istchr(path, '\n') || istchr(path, '\0'))
+ goto error;
+
+ /* The regex does not match, just to the last part and see if
+ * the index must be used.
+ */
+ if (!regex_exec_match2(fconn->app->pathinfo_re, path.ptr, len, MAX_MATCH, pmatch, 0))
+ goto check_index;
+
+ /* We must have at least 1 capture for the script name,
+ * otherwise we do nothing and jump to the last part.
+ */
+ if (pmatch[1].rm_so == -1 || pmatch[1].rm_eo == -1)
+ goto check_index;
+
+ /* Finally we can set the script_name and the path_info. The
+ * path_info is set if not already defined, and if it was
+ * captured
+ */
+ params->scriptname = ist2(path.ptr + pmatch[1].rm_so, pmatch[1].rm_eo - pmatch[1].rm_so);
+ if (!(params->mask & FCGI_SP_PATH_INFO) && !(pmatch[2].rm_so == -1 || pmatch[2].rm_eo == -1))
+ params->pathinfo = ist2(path.ptr + pmatch[2].rm_so, pmatch[2].rm_eo - pmatch[2].rm_so);
+
+ check_index:
+ len = params->scriptname.len;
+ /* the script_name if finished by a '/' so we can add the index
+ * part, if any.
+ */
+ if (istlen(fconn->app->index) && params->scriptname.ptr[len-1] == '/') {
+ struct ist sn = params->scriptname;
+
+ params->scriptname = ist2(b_tail(params->p), len+fconn->app->index.len);
+ chunk_istcat(params->p, sn);
+ chunk_istcat(params->p, fconn->app->index);
+ }
+ }
+
+ if (!(params->mask & FCGI_SP_SRV_SOFT)) {
+ params->srv_soft = ist2(b_tail(params->p), 0);
+ chunk_appendf(params->p, "HAProxy %s", haproxy_version);
+ params->srv_soft.len = b_tail(params->p) - params->srv_soft.ptr;
+ }
+
+ end:
+ return 1;
+ error:
+ return 0;
+}
+
+static int fcgi_encode_default_param(struct fcgi_conn *fconn, struct fcgi_strm *fstrm,
+ struct fcgi_strm_params *params, struct buffer *outbuf, int flag)
+{
+ struct fcgi_param p;
+
+ if (params->mask & flag)
+ return 1;
+
+ chunk_reset(&trash);
+
+ switch (flag) {
+ case FCGI_SP_CGI_GATEWAY:
+ p.n = ist("GATEWAY_INTERFACE");
+ p.v = ist("CGI/1.1");
+ goto encode;
+ case FCGI_SP_DOC_ROOT:
+ p.n = ist("DOCUMENT_ROOT");
+ p.v = params->docroot;
+ goto encode;
+ case FCGI_SP_SCRIPT_NAME:
+ p.n = ist("SCRIPT_NAME");
+ p.v = params->scriptname;
+ goto encode;
+ case FCGI_SP_PATH_INFO:
+ p.n = ist("PATH_INFO");
+ p.v = params->pathinfo;
+ goto encode;
+ case FCGI_SP_REQ_URI:
+ p.n = ist("REQUEST_URI");
+ p.v = params->uri;
+ goto encode;
+ case FCGI_SP_REQ_METH:
+ p.n = ist("REQUEST_METHOD");
+ p.v = params->meth;
+ goto encode;
+ case FCGI_SP_REQ_QS:
+ p.n = ist("QUERY_STRING");
+ p.v = params->qs;
+ goto encode;
+ case FCGI_SP_SRV_NAME:
+ p.n = ist("SERVER_NAME");
+ p.v = params->srv_name;
+ goto encode;
+ case FCGI_SP_SRV_PORT:
+ p.n = ist("SERVER_PORT");
+ p.v = params->srv_port;
+ goto encode;
+ case FCGI_SP_SRV_PROTO:
+ p.n = ist("SERVER_PROTOCOL");
+ p.v = params->vsn;
+ goto encode;
+ case FCGI_SP_REM_ADDR:
+ p.n = ist("REMOTE_ADDR");
+ p.v = params->rem_addr;
+ goto encode;
+ case FCGI_SP_REM_PORT:
+ p.n = ist("REMOTE_PORT");
+ p.v = params->rem_port;
+ goto encode;
+ case FCGI_SP_SCRIPT_FILE:
+ p.n = ist("SCRIPT_FILENAME");
+ chunk_istcat(&trash, params->docroot);
+ chunk_istcat(&trash, params->scriptname);
+ p.v = ist2(b_head(&trash), b_data(&trash));
+ goto encode;
+ case FCGI_SP_PATH_TRANS:
+ if (!istlen(params->pathinfo))
+ goto skip;
+ p.n = ist("PATH_TRANSLATED");
+ chunk_istcat(&trash, params->docroot);
+ chunk_istcat(&trash, params->pathinfo);
+ p.v = ist2(b_head(&trash), b_data(&trash));
+ goto encode;
+ case FCGI_SP_CONT_LEN:
+ p.n = ist("CONTENT_LENGTH");
+ p.v = params->cont_len;
+ goto encode;
+ case FCGI_SP_HTTPS:
+ if (!params->https)
+ goto skip;
+ p.n = ist("HTTPS");
+ p.v = ist("on");
+ goto encode;
+ case FCGI_SP_SRV_SOFT:
+ p.n = ist("SERVER_SOFTWARE");
+ p.v = params->srv_soft;
+ goto encode;
+ default:
+ goto skip;
+ }
+
+ encode:
+ if (!istlen(p.v))
+ goto skip;
+ if (!fcgi_encode_param(outbuf, &p))
+ return 0;
+ skip:
+ params->mask |= flag;
+ return 1;
+}
+
+/* Sends a GET_VALUES record. Returns > 0 on success, 0 if it couldn't do
+ * anything. It is highly unexpected, but if the record is larger than a buffer
+ * and cannot be encoded in one time, an error is triggered and the connection is
+ * closed. GET_VALUES record cannot be split.
+ */
+static int fcgi_conn_send_get_values(struct fcgi_conn *fconn)
+{
+ struct buffer outbuf;
+ struct buffer *mbuf;
+ struct fcgi_param max_reqs = { .n = ist("FCGI_MAX_REQS"), .v = ist("")};
+ struct fcgi_param mpxs_conns = { .n = ist("FCGI_MPXS_CONNS"), .v = ist("")};
+ int ret = 0;
+
+ TRACE_ENTER(FCGI_EV_TX_RECORD|FCGI_EV_TX_GETVAL, fconn->conn);
+
+ mbuf = br_tail(fconn->mbuf);
+ retry:
+ if (!fcgi_get_buf(fconn, mbuf)) {
+ fconn->flags |= FCGI_CF_MUX_MALLOC;
+ fconn->flags |= FCGI_CF_DEM_MROOM;
+ TRACE_STATE("waiting for fconn mbuf ring allocation", FCGI_EV_TX_RECORD|FCGI_EV_FCONN_BLK, fconn->conn);
+ ret = 0;
+ goto end;
+ }
+
+ while (1) {
+ outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
+ if (outbuf.size >= FCGI_RECORD_HEADER_SZ || !b_space_wraps(mbuf))
+ break;
+ realign_again:
+ b_slow_realign(mbuf, trash.area, b_data(mbuf));
+ }
+
+ if (outbuf.size < FCGI_RECORD_HEADER_SZ)
+ goto full;
+
+ /* vsn: 1(FCGI_VERSION), type: (9)FCGI_GET_VALUES, id: 0x0000,
+ * len: 0x0000 (fill later), padding: 0x00, rsv: 0x00 */
+ memcpy(outbuf.area, "\x01\x09\x00\x00\x00\x00\x00\x00", FCGI_RECORD_HEADER_SZ);
+ outbuf.data = FCGI_RECORD_HEADER_SZ;
+
+ /* Note: Don't send the param FCGI_MAX_CONNS because its value cannot be
+ * handled by HAProxy.
+ */
+ if (!fcgi_encode_param(&outbuf, &max_reqs) || !fcgi_encode_param(&outbuf, &mpxs_conns))
+ goto full;
+
+ /* update the record's size now */
+ TRACE_PROTO("FCGI GET_VALUES record xferred", FCGI_EV_TX_RECORD|FCGI_EV_TX_GETVAL, fconn->conn, 0, 0, (size_t[]){outbuf.data-8});
+ fcgi_set_record_size(outbuf.area, outbuf.data - FCGI_RECORD_HEADER_SZ);
+ b_add(mbuf, outbuf.data);
+ ret = 1;
+
+ end:
+ TRACE_LEAVE(FCGI_EV_TX_RECORD|FCGI_EV_TX_GETVAL, fconn->conn);
+ return ret;
+ full:
+ /* Too large to be encoded. For GET_VALUES records, it is an error */
+ if (!b_data(mbuf)) {
+ TRACE_ERROR("GET_VALUES record too large", FCGI_EV_TX_RECORD|FCGI_EV_TX_GETVAL|FCGI_EV_FCONN_ERR, fconn->conn);
+ goto fail;
+ }
+
+ if ((mbuf = br_tail_add(fconn->mbuf)) != NULL)
+ goto retry;
+ fconn->flags |= FCGI_CF_MUX_MFULL;
+ fconn->flags |= FCGI_CF_DEM_MROOM;
+ TRACE_STATE("mbuf ring full", FCGI_EV_TX_RECORD|FCGI_EV_FCONN_BLK, fconn->conn);
+ ret = 0;
+ goto end;
+ fail:
+ fconn->state = FCGI_CS_CLOSED;
+ TRACE_STATE("switching to CLOSED", FCGI_EV_TX_RECORD|FCGI_EV_TX_GETVAL|FCGI_EV_FCONN_END, fconn->conn);
+ TRACE_DEVEL("leaving on error", FCGI_EV_TX_RECORD|FCGI_EV_TX_GETVAL|FCGI_EV_FCONN_ERR, fconn->conn);
+ return 0;
+}
+
+/* Processes a GET_VALUES_RESULT record. Returns > 0 on success, 0 if it
+ * couldn't do anything. It is highly unexpected, but if the record is larger
+ * than a buffer and cannot be decoded in one time, an error is triggered and
+ * the connection is closed. GET_VALUES_RESULT record cannot be split.
+ */
+static int fcgi_conn_handle_values_result(struct fcgi_conn *fconn)
+{
+ struct buffer inbuf;
+ struct buffer *dbuf;
+ size_t offset;
+
+ TRACE_ENTER(FCGI_EV_RX_RECORD|FCGI_EV_RX_GETVAL, fconn->conn);
+
+ dbuf = &fconn->dbuf;
+
+ /* Record too large to be fully decoded */
+ if (b_size(dbuf) < (fconn->drl + fconn->drp))
+ goto fail;
+
+ /* process full record only */
+ if (b_data(dbuf) < (fconn->drl + fconn->drp)) {
+ TRACE_DEVEL("leaving on missing data", FCGI_EV_RX_RECORD|FCGI_EV_RX_GETVAL, fconn->conn);
+ return 0;
+ }
+
+ if (unlikely(b_contig_data(dbuf, b_head_ofs(dbuf)) < fconn->drl)) {
+ /* Realign the dmux buffer if the record wraps. It is unexpected
+ * at this stage because it should be the first record received
+ * from the FCGI application.
+ */
+ b_slow_realign_ofs(dbuf, trash.area, 0);
+ }
+
+ inbuf = b_make(b_head(dbuf), b_data(dbuf), 0, fconn->drl);
+
+ for (offset = 0; offset < b_data(&inbuf); ) {
+ struct fcgi_param p;
+ size_t ret;
+
+ ret = fcgi_aligned_decode_param(&inbuf, offset, &p);
+ if (!ret) {
+ /* name or value too large to be decoded at once */
+ TRACE_ERROR("error decoding GET_VALUES_RESULT param", FCGI_EV_RX_RECORD|FCGI_EV_RX_GETVAL|FCGI_EV_FCONN_ERR, fconn->conn);
+ goto fail;
+ }
+ offset += ret;
+
+ if (isteqi(p.n, ist("FCGI_MPXS_CONNS"))) {
+ if (isteq(p.v, ist("1"))) {
+ TRACE_STATE("set mpxs param", FCGI_EV_RX_RECORD|FCGI_EV_RX_GETVAL, fconn->conn, 0, 0, (size_t[]){1});
+ fconn->flags |= FCGI_CF_MPXS_CONNS;
+ }
+ else {
+ TRACE_STATE("set mpxs param", FCGI_EV_RX_RECORD|FCGI_EV_RX_GETVAL, fconn->conn, 0, 0, (size_t[]){0});
+ fconn->flags &= ~FCGI_CF_MPXS_CONNS;
+ }
+ }
+ else if (isteqi(p.n, ist("FCGI_MAX_REQS"))) {
+ fconn->streams_limit = strl2ui(p.v.ptr, p.v.len);
+ TRACE_STATE("set streams_limit", FCGI_EV_RX_RECORD|FCGI_EV_RX_GETVAL, fconn->conn, 0, 0, (size_t[]){fconn->streams_limit});
+ }
+ /*
+ * Ignore all other params
+ */
+ }
+
+ /* Reset the number of concurrent streams supported if the FCGI
+ * application does not support connection multiplexing
+ */
+ if (!(fconn->flags & FCGI_CF_MPXS_CONNS)) {
+ fconn->streams_limit = 1;
+ TRACE_STATE("no mpxs for streams_limit to 1", FCGI_EV_RX_RECORD|FCGI_EV_RX_GETVAL, fconn->conn);
+ }
+
+ /* We must be sure to have read exactly the announced record length, no
+ * more no less
+ */
+ if (offset != fconn->drl) {
+ TRACE_ERROR("invalid GET_VALUES_RESULT record length", FCGI_EV_RX_RECORD|FCGI_EV_RX_GETVAL|FCGI_EV_FCONN_ERR, fconn->conn);
+ goto fail;
+ }
+
+ TRACE_PROTO("FCGI GET_VALUES_RESULT record rcvd", FCGI_EV_RX_RECORD|FCGI_EV_RX_GETVAL, fconn->conn, 0, 0, (size_t[]){fconn->drl});
+ b_del(&fconn->dbuf, fconn->drl + fconn->drp);
+ fconn->drl = 0;
+ fconn->drp = 0;
+ fconn->state = FCGI_CS_RECORD_H;
+ fcgi_wake_unassigned_streams(fconn);
+ TRACE_STATE("switching to RECORD_H", FCGI_EV_RX_RECORD|FCGI_EV_RX_FHDR, fconn->conn);
+ TRACE_LEAVE(FCGI_EV_RX_RECORD|FCGI_EV_RX_GETVAL, fconn->conn);
+ return 1;
+ fail:
+ fconn->state = FCGI_CS_CLOSED;
+ TRACE_STATE("switching to CLOSED", FCGI_EV_RX_RECORD|FCGI_EV_RX_GETVAL, fconn->conn);
+ TRACE_DEVEL("leaving on error", FCGI_EV_RX_RECORD|FCGI_EV_RX_GETVAL|FCGI_EV_FCONN_ERR, fconn->conn);
+ return 0;
+}
+
+/* Sends an ABORT_REQUEST record for each active streams. Closed streams are
+ * excluded, as the streams which already received the end-of-stream. It returns
+ * > 0 if the record was sent tp all streams. Otherwise it returns 0.
+ */
+static int fcgi_conn_send_aborts(struct fcgi_conn *fconn)
+{
+ struct eb32_node *node;
+ struct fcgi_strm *fstrm;
+
+ TRACE_ENTER(FCGI_EV_TX_RECORD, fconn->conn);
+
+ node = eb32_lookup_ge(&fconn->streams_by_id, 1);
+ while (node) {
+ fstrm = container_of(node, struct fcgi_strm, by_id);
+ node = eb32_next(node);
+ if (fstrm->state != FCGI_SS_CLOSED &&
+ !(fstrm->flags & (FCGI_SF_ES_RCVD|FCGI_SF_ABRT_SENT)) &&
+ !fcgi_strm_send_abort(fconn, fstrm))
+ return 0;
+ }
+ fconn->flags |= FCGI_CF_ABRTS_SENT;
+ TRACE_STATE("aborts sent to all fstrms", FCGI_EV_TX_RECORD, fconn->conn);
+ TRACE_LEAVE(FCGI_EV_TX_RECORD, fconn->conn);
+ return 1;
+}
+
+/* Sends a BEGIN_REQUEST record. It returns > 0 on success, 0 if it couldn't do
+ * anything. BEGIN_REQUEST record cannot be split. So we wait to have enough
+ * space to proceed. It is small enough to be encoded in an empty buffer.
+ */
+static int fcgi_strm_send_begin_request(struct fcgi_conn *fconn, struct fcgi_strm *fstrm)
+{
+ struct buffer outbuf;
+ struct buffer *mbuf;
+ struct fcgi_begin_request rec = { .role = FCGI_RESPONDER, .flags = 0};
+ int ret;
+
+ TRACE_ENTER(FCGI_EV_TX_RECORD|FCGI_EV_TX_BEGREQ, fconn->conn, fstrm);
+
+ mbuf = br_tail(fconn->mbuf);
+ retry:
+ if (!fcgi_get_buf(fconn, mbuf)) {
+ fconn->flags |= FCGI_CF_MUX_MALLOC;
+ fstrm->flags |= FCGI_SF_BLK_MROOM;
+ TRACE_STATE("waiting for fconn mbuf ring allocation", FCGI_EV_TX_RECORD|FCGI_EV_FSTRM_BLK|FCGI_EV_FCONN_BLK, fconn->conn, fstrm);
+ ret = 0;
+ goto end;
+ }
+
+ while (1) {
+ outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
+ if (outbuf.size >= FCGI_RECORD_HEADER_SZ || !b_space_wraps(mbuf))
+ break;
+ realign_again:
+ b_slow_realign(mbuf, trash.area, b_data(mbuf));
+ }
+
+ if (outbuf.size < FCGI_RECORD_HEADER_SZ)
+ goto full;
+
+ /* vsn: 1(FCGI_VERSION), type: (1)FCGI_BEGIN_REQUEST, id: fstrm->id,
+ * len: 0x0008, padding: 0x00, rsv: 0x00 */
+ memcpy(outbuf.area, "\x01\x01\x00\x00\x00\x08\x00\x00", FCGI_RECORD_HEADER_SZ);
+ fcgi_set_record_id(outbuf.area, fstrm->id);
+ outbuf.data = FCGI_RECORD_HEADER_SZ;
+
+ if (fconn->flags & FCGI_CF_KEEP_CONN) {
+ TRACE_STATE("keep connection opened", FCGI_EV_TX_RECORD|FCGI_EV_TX_BEGREQ, fconn->conn, fstrm);
+ rec.flags |= FCGI_KEEP_CONN;
+ }
+ if (!fcgi_encode_begin_request(&outbuf, &rec))
+ goto full;
+
+ /* commit the record */
+ TRACE_PROTO("FCGI BEGIN_REQUEST record xferred", FCGI_EV_TX_RECORD|FCGI_EV_TX_BEGREQ, fconn->conn, fstrm, 0, (size_t[]){0});
+ b_add(mbuf, outbuf.data);
+ fstrm->flags |= FCGI_SF_BEGIN_SENT;
+ fstrm->state = FCGI_SS_OPEN;
+ TRACE_STATE("switching to OPEN", FCGI_EV_TX_RECORD|FCGI_EV_TX_BEGREQ, fconn->conn, fstrm);
+ ret = 1;
+
+ end:
+ TRACE_LEAVE(FCGI_EV_TX_RECORD|FCGI_EV_TX_BEGREQ, fconn->conn, fstrm);
+ return ret;
+ full:
+ if ((mbuf = br_tail_add(fconn->mbuf)) != NULL)
+ goto retry;
+ fconn->flags |= FCGI_CF_MUX_MFULL;
+ fstrm->flags |= FCGI_SF_BLK_MROOM;
+ TRACE_STATE("mbuf ring full", FCGI_EV_TX_RECORD|FCGI_EV_FSTRM_BLK|FCGI_EV_FCONN_BLK, fconn->conn);
+ ret = 0;
+ goto end;
+}
+
+/* Sends an empty record of type <rtype>. It returns > 0 on success, 0 if it
+ * couldn't do anything. Empty record cannot be split. So we wait to have enough
+ * space to proceed. It is small enough to be encoded in an empty buffer.
+ */
+static int fcgi_strm_send_empty_record(struct fcgi_conn *fconn, struct fcgi_strm *fstrm,
+ enum fcgi_record_type rtype)
+{
+ struct buffer outbuf;
+ struct buffer *mbuf;
+ int ret;
+
+ TRACE_ENTER(FCGI_EV_TX_RECORD, fconn->conn, fstrm);
+ mbuf = br_tail(fconn->mbuf);
+ retry:
+ if (!fcgi_get_buf(fconn, mbuf)) {
+ fconn->flags |= FCGI_CF_MUX_MALLOC;
+ fstrm->flags |= FCGI_SF_BLK_MROOM;
+ TRACE_STATE("waiting for fconn mbuf ring allocation", FCGI_EV_TX_RECORD|FCGI_EV_FSTRM_BLK|FCGI_EV_FCONN_BLK, fconn->conn, fstrm);
+ ret = 0;
+ goto end;
+ }
+
+ while (1) {
+ outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
+ if (outbuf.size >= FCGI_RECORD_HEADER_SZ || !b_space_wraps(mbuf))
+ break;
+ realign_again:
+ b_slow_realign(mbuf, trash.area, b_data(mbuf));
+ }
+
+ if (outbuf.size < FCGI_RECORD_HEADER_SZ)
+ goto full;
+
+ /* vsn: 1(FCGI_VERSION), type: rtype, id: fstrm->id,
+ * len: 0x0000, padding: 0x00, rsv: 0x00 */
+ memcpy(outbuf.area, "\x01\x05\x00\x00\x00\x00\x00\x00", FCGI_RECORD_HEADER_SZ);
+ outbuf.area[1] = rtype;
+ fcgi_set_record_id(outbuf.area, fstrm->id);
+ outbuf.data = FCGI_RECORD_HEADER_SZ;
+
+ /* commit the record */
+ b_add(mbuf, outbuf.data);
+ ret = 1;
+
+ end:
+ TRACE_LEAVE(FCGI_EV_TX_RECORD, fconn->conn, fstrm);
+ return ret;
+ full:
+ if ((mbuf = br_tail_add(fconn->mbuf)) != NULL)
+ goto retry;
+ fconn->flags |= FCGI_CF_MUX_MFULL;
+ fstrm->flags |= FCGI_SF_BLK_MROOM;
+ TRACE_STATE("mbuf ring full", FCGI_EV_TX_RECORD|FCGI_EV_FSTRM_BLK|FCGI_EV_FCONN_BLK, fconn->conn, fstrm);
+ ret = 0;
+ goto end;
+}
+
+
+/* Sends an empty PARAMS record. It relies on fcgi_strm_send_empty_record(). It
+ * marks the end of params.
+ */
+static int fcgi_strm_send_empty_params(struct fcgi_conn *fconn, struct fcgi_strm *fstrm)
+{
+ int ret;
+
+ TRACE_POINT(FCGI_EV_TX_RECORD|FCGI_EV_TX_PARAMS, fconn->conn, fstrm);
+ ret = fcgi_strm_send_empty_record(fconn, fstrm, FCGI_PARAMS);
+ if (ret) {
+ fstrm->flags |= FCGI_SF_EP_SENT;
+ TRACE_PROTO("FCGI PARAMS record xferred", FCGI_EV_TX_RECORD|FCGI_EV_TX_STDIN, fconn->conn, fstrm, 0, (size_t[]){0});
+ }
+ return ret;
+}
+
+/* Sends an empty STDIN record. It relies on fcgi_strm_send_empty_record(). It
+ * marks the end of input. On success, all the request was successfully sent.
+ */
+static int fcgi_strm_send_empty_stdin(struct fcgi_conn *fconn, struct fcgi_strm *fstrm)
+{
+ int ret;
+
+ TRACE_POINT(FCGI_EV_TX_RECORD|FCGI_EV_TX_STDIN|FCGI_EV_TX_EOI, fconn->conn, fstrm);
+ ret = fcgi_strm_send_empty_record(fconn, fstrm, FCGI_STDIN);
+ if (ret) {
+ fstrm->flags |= FCGI_SF_ES_SENT;
+ TRACE_PROTO("FCGI STDIN record xferred", FCGI_EV_TX_RECORD|FCGI_EV_TX_STDIN, fconn->conn, fstrm, 0, (size_t[]){0});
+ TRACE_USER("FCGI request fully xferred", FCGI_EV_TX_RECORD|FCGI_EV_TX_STDIN|FCGI_EV_TX_EOI, fconn->conn, fstrm);
+ TRACE_STATE("stdin data fully sent", FCGI_EV_TX_RECORD|FCGI_EV_TX_STDIN|FCGI_EV_TX_EOI, fconn->conn, fstrm);
+ }
+ return ret;
+}
+
+/* Sends an ABORT_REQUEST record. It relies on fcgi_strm_send_empty_record(). It
+ * stops the request processing.
+ */
+static int fcgi_strm_send_abort(struct fcgi_conn *fconn, struct fcgi_strm *fstrm)
+{
+ int ret;
+
+ TRACE_POINT(FCGI_EV_TX_RECORD|FCGI_EV_TX_ABORT, fconn->conn, fstrm);
+ ret = fcgi_strm_send_empty_record(fconn, fstrm, FCGI_ABORT_REQUEST);
+ if (ret) {
+ fstrm->flags |= FCGI_SF_ABRT_SENT;
+ TRACE_PROTO("FCGI ABORT record xferred", FCGI_EV_TX_RECORD|FCGI_EV_TX_ABORT, fconn->conn, fstrm, 0, (size_t[]){0});
+ TRACE_USER("FCGI request aborted", FCGI_EV_TX_RECORD|FCGI_EV_TX_ABORT, fconn->conn, fstrm);
+ TRACE_STATE("abort sent", FCGI_EV_TX_RECORD|FCGI_EV_TX_ABORT, fconn->conn, fstrm);
+ }
+ return ret;
+}
+
+/* Sends a PARAMS record. Returns > 0 on success, 0 if it couldn't do
+ * anything. If there are too much K/V params to be encoded in a PARAMS record,
+ * several records are sent. However, a K/V param cannot be split between 2
+ * records.
+ */
+static size_t fcgi_strm_send_params(struct fcgi_conn *fconn, struct fcgi_strm *fstrm,
+ struct htx *htx)
+{
+ struct buffer outbuf;
+ struct buffer *mbuf;
+ struct htx_blk *blk;
+ struct htx_sl *sl = NULL;
+ struct fcgi_strm_params params;
+ size_t total = 0;
+
+ TRACE_ENTER(FCGI_EV_TX_RECORD|FCGI_EV_TX_PARAMS, fconn->conn, fstrm, htx);
+
+ memset(&params, 0, sizeof(params));
+ params.p = get_trash_chunk();
+
+ mbuf = br_tail(fconn->mbuf);
+ retry:
+ if (!fcgi_get_buf(fconn, mbuf)) {
+ fconn->flags |= FCGI_CF_MUX_MALLOC;
+ fstrm->flags |= FCGI_SF_BLK_MROOM;
+ TRACE_STATE("waiting for fconn mbuf ring allocation", FCGI_EV_TX_RECORD|FCGI_EV_FSTRM_BLK|FCGI_EV_FCONN_BLK, fconn->conn, fstrm);
+ goto end;
+ }
+
+ while (1) {
+ outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
+ if (outbuf.size >= FCGI_RECORD_HEADER_SZ || !b_space_wraps(mbuf))
+ break;
+ realign_again:
+ b_slow_realign(mbuf, trash.area, b_data(mbuf));
+ }
+
+ if (outbuf.size < FCGI_RECORD_HEADER_SZ)
+ goto full;
+
+ /* vsn: 1(FCGI_VERSION), type: (4)FCGI_PARAMS, id: fstrm->id,
+ * len: 0x0000 (fill later), padding: 0x00, rsv: 0x00 */
+ memcpy(outbuf.area, "\x01\x04\x00\x00\x00\x00\x00\x00", FCGI_RECORD_HEADER_SZ);
+ fcgi_set_record_id(outbuf.area, fstrm->id);
+ outbuf.data = FCGI_RECORD_HEADER_SZ;
+
+ blk = htx_get_head_blk(htx);
+ while (blk) {
+ enum htx_blk_type type;
+ uint32_t size = htx_get_blksz(blk);
+ struct fcgi_param p;
+
+ type = htx_get_blk_type(blk);
+ switch (type) {
+ case HTX_BLK_REQ_SL:
+ sl = htx_get_blk_ptr(htx, blk);
+ if (sl->info.req.meth == HTTP_METH_HEAD)
+ fstrm->h1m.flags |= H1_MF_METH_HEAD;
+ if (sl->flags & HTX_SL_F_VER_11)
+ fstrm->h1m.flags |= H1_MF_VER_11;
+ break;
+
+ case HTX_BLK_HDR:
+ p.n = htx_get_blk_name(htx, blk);
+ p.v = htx_get_blk_value(htx, blk);
+
+ if (istmatch(p.n, ist(":fcgi-"))) {
+ p.n = istadv(p.n, 6);
+ if (isteq(p.n, ist("gateway_interface")))
+ params.mask |= FCGI_SP_CGI_GATEWAY;
+ else if (isteq(p.n, ist("document_root"))) {
+ params.mask |= FCGI_SP_DOC_ROOT;
+ params.docroot = p.v;
+ }
+ else if (isteq(p.n, ist("script_name"))) {
+ params.mask |= FCGI_SP_SCRIPT_NAME;
+ params.scriptname = p.v;
+ }
+ else if (isteq(p.n, ist("path_info"))) {
+ params.mask |= FCGI_SP_PATH_INFO;
+ params.pathinfo = p.v;
+ }
+ else if (isteq(p.n, ist("request_uri"))) {
+ params.mask |= FCGI_SP_REQ_URI;
+ params.uri = p.v;
+ }
+ else if (isteq(p.n, ist("request_meth")))
+ params.mask |= FCGI_SP_REQ_METH;
+ else if (isteq(p.n, ist("query_string")))
+ params.mask |= FCGI_SP_REQ_QS;
+ else if (isteq(p.n, ist("server_name")))
+ params.mask |= FCGI_SP_SRV_NAME;
+ else if (isteq(p.n, ist("server_port")))
+ params.mask |= FCGI_SP_SRV_PORT;
+ else if (isteq(p.n, ist("server_protocol")))
+ params.mask |= FCGI_SP_SRV_PROTO;
+ else if (isteq(p.n, ist("remote_addr")))
+ params.mask |= FCGI_SP_REM_ADDR;
+ else if (isteq(p.n, ist("remote_port")))
+ params.mask |= FCGI_SP_REM_PORT;
+ else if (isteq(p.n, ist("script_filename")))
+ params.mask |= FCGI_SP_SCRIPT_FILE;
+ else if (isteq(p.n, ist("path_translated")))
+ params.mask |= FCGI_SP_PATH_TRANS;
+ else if (isteq(p.n, ist("https")))
+ params.mask |= FCGI_SP_HTTPS;
+ else if (isteq(p.n, ist("server_software")))
+ params.mask |= FCGI_SP_SRV_SOFT;
+ }
+ else if (isteq(p.n, ist("content-length"))) {
+ p.n = ist("CONTENT_LENGTH");
+ params.mask |= FCGI_SP_CONT_LEN;
+ }
+ else if (isteq(p.n, ist("content-type")))
+ p.n = ist("CONTENT_TYPE");
+ else {
+ struct ist n;
+
+ if (isteq(p.n, ist("host")))
+ params.srv_name = p.v;
+ else if (isteq(p.n, ist("te"))) {
+ /* "te" may only be sent with "trailers" if this value
+ * is present, otherwise it must be deleted.
+ */
+ p.v = istist(p.v, ist("trailers"));
+ if (!isttest(p.v) || (p.v.len > 8 && p.v.ptr[8] != ','))
+ break;
+ p.v = ist("trailers");
+ }
+
+ /* Skip header if same name is used to add the server name */
+ if (isttest(fconn->proxy->server_id_hdr_name) && isteq(p.n, fconn->proxy->server_id_hdr_name))
+ break;
+
+ n = ist2(trash.area, 0);
+ istcat(&n, ist("http_"), trash.size);
+ istcat(&n, p.n, trash.size);
+ p.n = n;
+ }
+
+ if (!fcgi_encode_param(&outbuf, &p)) {
+ if (b_space_wraps(mbuf))
+ goto realign_again;
+ if (outbuf.data == FCGI_RECORD_HEADER_SZ)
+ goto full;
+ goto done;
+ }
+ break;
+
+ case HTX_BLK_EOH:
+ if (isttest(fconn->proxy->server_id_hdr_name)) {
+ struct server *srv = objt_server(fconn->conn->target);
+
+ if (!srv)
+ goto done;
+
+ p.n = ist2(trash.area, 0);
+ istcat(&p.n, ist("http_"), trash.size);
+ istcat(&p.n, fconn->proxy->server_id_hdr_name, trash.size);
+ p.v = ist(srv->id);
+
+ if (!fcgi_encode_param(&outbuf, &p)) {
+ if (b_space_wraps(mbuf))
+ goto realign_again;
+ if (outbuf.data == FCGI_RECORD_HEADER_SZ)
+ goto full;
+ }
+ TRACE_STATE("add server name header", FCGI_EV_TX_RECORD|FCGI_EV_TX_PARAMS, fconn->conn, fstrm);
+ }
+ goto done;
+
+ default:
+ break;
+ }
+ total += size;
+ blk = htx_remove_blk(htx, blk);
+ }
+
+ done:
+ if (!fcgi_set_default_param(fconn, fstrm, htx, sl, &params)) {
+ TRACE_ERROR("error setting default params", FCGI_EV_TX_RECORD|FCGI_EV_STRM_ERR, fconn->conn, fstrm);
+ goto error;
+ }
+
+ if (!fcgi_encode_default_param(fconn, fstrm, &params, &outbuf, FCGI_SP_CGI_GATEWAY) ||
+ !fcgi_encode_default_param(fconn, fstrm, &params, &outbuf, FCGI_SP_DOC_ROOT) ||
+ !fcgi_encode_default_param(fconn, fstrm, &params, &outbuf, FCGI_SP_SCRIPT_NAME) ||
+ !fcgi_encode_default_param(fconn, fstrm, &params, &outbuf, FCGI_SP_PATH_INFO) ||
+ !fcgi_encode_default_param(fconn, fstrm, &params, &outbuf, FCGI_SP_REQ_URI) ||
+ !fcgi_encode_default_param(fconn, fstrm, &params, &outbuf, FCGI_SP_REQ_METH) ||
+ !fcgi_encode_default_param(fconn, fstrm, &params, &outbuf, FCGI_SP_REQ_QS) ||
+ !fcgi_encode_default_param(fconn, fstrm, &params, &outbuf, FCGI_SP_SRV_NAME) ||
+ !fcgi_encode_default_param(fconn, fstrm, &params, &outbuf, FCGI_SP_SRV_PORT) ||
+ !fcgi_encode_default_param(fconn, fstrm, &params, &outbuf, FCGI_SP_SRV_PROTO) ||
+ !fcgi_encode_default_param(fconn, fstrm, &params, &outbuf, FCGI_SP_REM_ADDR) ||
+ !fcgi_encode_default_param(fconn, fstrm, &params, &outbuf, FCGI_SP_REM_PORT) ||
+ !fcgi_encode_default_param(fconn, fstrm, &params, &outbuf, FCGI_SP_SCRIPT_FILE) ||
+ !fcgi_encode_default_param(fconn, fstrm, &params, &outbuf, FCGI_SP_PATH_TRANS) ||
+ !fcgi_encode_default_param(fconn, fstrm, &params, &outbuf, FCGI_SP_CONT_LEN) ||
+ !fcgi_encode_default_param(fconn, fstrm, &params, &outbuf, FCGI_SP_SRV_SOFT) ||
+ !fcgi_encode_default_param(fconn, fstrm, &params, &outbuf, FCGI_SP_HTTPS)) {
+ TRACE_ERROR("error encoding default params", FCGI_EV_TX_RECORD|FCGI_EV_STRM_ERR, fconn->conn, fstrm);
+ goto error;
+ }
+
+ /* update the record's size */
+ TRACE_PROTO("FCGI PARAMS record xferred", FCGI_EV_TX_RECORD|FCGI_EV_TX_PARAMS, fconn->conn, fstrm, 0, (size_t[]){outbuf.data - FCGI_RECORD_HEADER_SZ});
+ fcgi_set_record_size(outbuf.area, outbuf.data - FCGI_RECORD_HEADER_SZ);
+ b_add(mbuf, outbuf.data);
+
+ end:
+ TRACE_LEAVE(FCGI_EV_TX_RECORD|FCGI_EV_TX_PARAMS, fconn->conn, fstrm, htx, (size_t[]){total});
+ return total;
+ full:
+ if ((mbuf = br_tail_add(fconn->mbuf)) != NULL)
+ goto retry;
+ fconn->flags |= FCGI_CF_MUX_MFULL;
+ fstrm->flags |= FCGI_SF_BLK_MROOM;
+ TRACE_STATE("mbuf ring full", FCGI_EV_TX_RECORD|FCGI_EV_FSTRM_BLK|FCGI_EV_FCONN_BLK, fconn->conn, fstrm);
+ if (total)
+ goto error;
+ goto end;
+
+ error:
+ htx->flags |= HTX_FL_PROCESSING_ERROR;
+ TRACE_ERROR("processing error sending PARAMS record", FCGI_EV_TX_RECORD|FCGI_EV_STRM_ERR, fconn->conn, fstrm);
+ fcgi_strm_error(fstrm);
+ goto end;
+}
+
+/* Sends a STDIN record. Returns > 0 on success, 0 if it couldn't do
+ * anything. STDIN records contain the request body.
+ */
+static size_t fcgi_strm_send_stdin(struct fcgi_conn *fconn, struct fcgi_strm *fstrm,
+ struct htx *htx, size_t count, struct buffer *buf)
+{
+ struct buffer outbuf;
+ struct buffer *mbuf;
+ struct htx_blk *blk;
+ enum htx_blk_type type;
+ uint32_t size, extra_bytes;
+ size_t total = 0;
+
+ extra_bytes = 0;
+
+ TRACE_ENTER(FCGI_EV_TX_RECORD|FCGI_EV_TX_STDIN, fconn->conn, fstrm, htx, (size_t[]){count});
+ if (!count)
+ goto end;
+
+ mbuf = br_tail(fconn->mbuf);
+ retry:
+ if (!fcgi_get_buf(fconn, mbuf)) {
+ fconn->flags |= FCGI_CF_MUX_MALLOC;
+ fstrm->flags |= FCGI_SF_BLK_MROOM;
+ TRACE_STATE("waiting for fconn mbuf ring allocation", FCGI_EV_TX_RECORD|FCGI_EV_FSTRM_BLK|FCGI_EV_FCONN_BLK, fconn->conn, fstrm);
+ goto end;
+ }
+
+ /* Perform some optimizations to reduce the number of buffer copies.
+ * First, if the mux's buffer is empty and the htx area contains exactly
+ * one data block of the same size as the requested count, and this
+ * count fits within the record size, then it's possible to simply swap
+ * the caller's buffer with the mux's output buffer and adjust offsets
+ * and length to match the entire DATA HTX block in the middle. In this
+ * case we perform a true zero-copy operation from end-to-end. This is
+ * the situation that happens all the time with large files. Second, if
+ * this is not possible, but the mux's output buffer is empty, we still
+ * have an opportunity to avoid the copy to the intermediary buffer, by
+ * making the intermediary buffer's area point to the output buffer's
+ * area. In this case we want to skip the HTX header to make sure that
+ * copies remain aligned and that this operation remains possible all
+ * the time. This goes for headers, data blocks and any data extracted
+ * from the HTX blocks.
+ */
+ blk = htx_get_head_blk(htx);
+ if (!blk)
+ goto end;
+ type = htx_get_blk_type(blk);
+ size = htx_get_blksz(blk);
+ if (unlikely(size == count && htx_nbblks(htx) == 1 && type == HTX_BLK_DATA)) {
+ void *old_area = mbuf->area;
+ int eom = (htx->flags & HTX_FL_EOM);
+
+ /* Last block of the message: Reserve the size for the empty stdin record */
+ if (eom)
+ extra_bytes = FCGI_RECORD_HEADER_SZ;
+
+ if (b_data(mbuf)) {
+ /* Too bad there are data left there. We're willing to memcpy/memmove
+ * up to 1/4 of the buffer, which means that it's OK to copy a large
+ * record into a buffer containing few data if it needs to be realigned,
+ * and that it's also OK to copy few data without realigning. Otherwise
+ * we'll pretend the mbuf is full and wait for it to become empty.
+ */
+ if (size + FCGI_RECORD_HEADER_SZ + extra_bytes <= b_room(mbuf) &&
+ (b_data(mbuf) <= b_size(mbuf) / 4 ||
+ (size <= b_size(mbuf) / 4 && size + FCGI_RECORD_HEADER_SZ + extra_bytes <= b_contig_space(mbuf))))
+ goto copy;
+ goto full;
+ }
+
+ TRACE_PROTO("sending stding data (zero-copy)", FCGI_EV_TX_RECORD|FCGI_EV_TX_STDIN, fconn->conn, fstrm, htx, (size_t[]){size});
+ /* map a FCGI record to the HTX block so that we can put the
+ * record header there.
+ */
+ *mbuf = b_make(buf->area, buf->size, sizeof(struct htx) + blk->addr - FCGI_RECORD_HEADER_SZ, size + FCGI_RECORD_HEADER_SZ);
+ outbuf.area = b_head(mbuf);
+
+ /* prepend a FCGI record header just before the DATA block */
+ memcpy(outbuf.area, "\x01\x05\x00\x00\x00\x00\x00\x00", FCGI_RECORD_HEADER_SZ);
+ fcgi_set_record_id(outbuf.area, fstrm->id);
+ fcgi_set_record_size(outbuf.area, size);
+
+ /* and exchange with our old area */
+ buf->area = old_area;
+ buf->data = buf->head = 0;
+ total += size;
+
+ htx = (struct htx *)buf->area;
+ htx_reset(htx);
+ if (eom)
+ goto empty_stdin;
+ goto end;
+ }
+
+ copy:
+ while (1) {
+ outbuf = b_make(b_tail(mbuf), b_contig_space(mbuf), 0, 0);
+ if (outbuf.size >= FCGI_RECORD_HEADER_SZ + extra_bytes || !b_space_wraps(mbuf))
+ break;
+ realign_again:
+ b_slow_realign(mbuf, trash.area, b_data(mbuf));
+ }
+
+ if (outbuf.size < FCGI_RECORD_HEADER_SZ + extra_bytes)
+ goto full;
+
+ /* vsn: 1(FCGI_VERSION), type: (5)FCGI_STDIN, id: fstrm->id,
+ * len: 0x0000 (fill later), padding: 0x00, rsv: 0x00 */
+ memcpy(outbuf.area, "\x01\x05\x00\x00\x00\x00\x00\x00", FCGI_RECORD_HEADER_SZ);
+ fcgi_set_record_id(outbuf.area, fstrm->id);
+ outbuf.data = FCGI_RECORD_HEADER_SZ;
+
+ blk = htx_get_head_blk(htx);
+ while (blk && count) {
+ enum htx_blk_type type = htx_get_blk_type(blk);
+ uint32_t size = htx_get_blksz(blk);
+ struct ist v;
+
+ switch (type) {
+ case HTX_BLK_DATA:
+ TRACE_PROTO("sending stding data", FCGI_EV_TX_RECORD|FCGI_EV_TX_STDIN, fconn->conn, fstrm, htx, (size_t[]){size});
+ v = htx_get_blk_value(htx, blk);
+
+ if (htx_is_unique_blk(htx, blk) && (htx->flags & HTX_FL_EOM))
+ extra_bytes = FCGI_RECORD_HEADER_SZ; /* Last block of the message */
+
+ if (v.len > count) {
+ v.len = count;
+ extra_bytes = 0;
+ }
+
+ if (v.len + FCGI_RECORD_HEADER_SZ + extra_bytes > b_room(&outbuf)) {
+ /* It doesn't fit at once. If it at least fits once split and
+ * the amount of data to move is low, let's defragment the
+ * buffer now.
+ */
+ if (b_space_wraps(mbuf) &&
+ b_data(&outbuf) + v.len + extra_bytes <= b_room(mbuf) &&
+ b_data(mbuf) <= MAX_DATA_REALIGN)
+ goto realign_again;
+ v.len = (FCGI_RECORD_HEADER_SZ + extra_bytes > b_room(&outbuf)
+ ? 0
+ : b_room(&outbuf) - FCGI_RECORD_HEADER_SZ - extra_bytes);
+ }
+ if (!v.len || !chunk_memcat(&outbuf, v.ptr, v.len)) {
+ if (outbuf.data == FCGI_RECORD_HEADER_SZ)
+ goto full;
+ goto done;
+ }
+ if (v.len != size) {
+ total += v.len;
+ count -= v.len;
+ htx_cut_data_blk(htx, blk, v.len);
+ goto done;
+ }
+ break;
+
+ default:
+ break;
+ }
+ total += size;
+ count -= size;
+ blk = htx_remove_blk(htx, blk);
+ }
+
+ done:
+ /* update the record's size */
+ TRACE_PROTO("FCGI STDIN record xferred", FCGI_EV_TX_RECORD|FCGI_EV_TX_STDIN, fconn->conn, fstrm, 0, (size_t[]){outbuf.data - FCGI_RECORD_HEADER_SZ});
+ fcgi_set_record_size(outbuf.area, outbuf.data - FCGI_RECORD_HEADER_SZ);
+ b_add(mbuf, outbuf.data);
+
+ /* Send the empty stding here to finish the message */
+ if (htx_is_empty(htx) && (htx->flags & HTX_FL_EOM)) {
+ empty_stdin:
+ TRACE_PROTO("sending FCGI STDIN record", FCGI_EV_TX_RECORD|FCGI_EV_TX_STDIN, fconn->conn, fstrm, htx);
+ if (!fcgi_strm_send_empty_stdin(fconn, fstrm)) {
+ /* bytes already reserved for this record. It should not fail */
+ htx->flags |= HTX_FL_PROCESSING_ERROR;
+ TRACE_ERROR("processing error sending empty STDIN record", FCGI_EV_TX_RECORD|FCGI_EV_STRM_ERR, fconn->conn, fstrm);
+ fcgi_strm_error(fstrm);
+ }
+ }
+
+ end:
+ TRACE_LEAVE(FCGI_EV_TX_RECORD|FCGI_EV_TX_STDIN, fconn->conn, fstrm, htx, (size_t[]){total});
+ return total;
+ full:
+ if ((mbuf = br_tail_add(fconn->mbuf)) != NULL)
+ goto retry;
+ fconn->flags |= FCGI_CF_MUX_MFULL;
+ fstrm->flags |= FCGI_SF_BLK_MROOM;
+ TRACE_STATE("mbuf ring full", FCGI_EV_TX_RECORD|FCGI_EV_FSTRM_BLK|FCGI_EV_FCONN_BLK, fconn->conn, fstrm);
+ goto end;
+}
+
+/* Processes a STDOUT record. Returns > 0 on success, 0 if it couldn't do
+ * anything. STDOUT records contain the entire response. All the content is
+ * copied in the stream's rxbuf. The parsing will be handled in fcgi_rcv_buf().
+ */
+static int fcgi_strm_handle_stdout(struct fcgi_conn *fconn, struct fcgi_strm *fstrm)
+{
+ struct buffer *dbuf;
+ size_t ret;
+ size_t max;
+
+ TRACE_ENTER(FCGI_EV_RX_RECORD|FCGI_EV_RX_STDOUT, fconn->conn, fstrm);
+
+ dbuf = &fconn->dbuf;
+
+ /* Only padding remains */
+ if (fconn->state == FCGI_CS_RECORD_P)
+ goto end_transfer;
+
+ if (b_data(dbuf) < (fconn->drl + fconn->drp) &&
+ b_size(dbuf) > (fconn->drl + fconn->drp) &&
+ buf_room_for_htx_data(dbuf))
+ goto fail; // incomplete record
+
+ if (!fcgi_get_buf(fconn, &fstrm->rxbuf)) {
+ fconn->flags |= FCGI_CF_DEM_SALLOC;
+ TRACE_STATE("waiting for fstrm rxbuf allocation", FCGI_EV_RX_RECORD|FCGI_EV_FSTRM_BLK, fconn->conn, fstrm);
+ goto fail;
+ }
+
+ /*max = MIN(b_room(&fstrm->rxbuf), fconn->drl);*/
+ max = buf_room_for_htx_data(&fstrm->rxbuf);
+ if (!b_data(&fstrm->rxbuf))
+ fstrm->rxbuf.head = sizeof(struct htx);
+ if (max > fconn->drl)
+ max = fconn->drl;
+
+ ret = b_xfer(&fstrm->rxbuf, dbuf, max);
+ if (!ret)
+ goto fail;
+ fconn->drl -= ret;
+ TRACE_DATA("move some data to fstrm rxbuf", FCGI_EV_RX_RECORD|FCGI_EV_RX_STDOUT, fconn->conn, fstrm, 0, (size_t[]){ret});
+ TRACE_PROTO("FCGI STDOUT record rcvd", FCGI_EV_RX_RECORD|FCGI_EV_RX_STDOUT, fconn->conn, fstrm, 0, (size_t[]){ret});
+
+ if (!buf_room_for_htx_data(&fstrm->rxbuf)) {
+ fconn->flags |= FCGI_CF_DEM_SFULL;
+ TRACE_STATE("fstrm rxbuf full", FCGI_EV_RX_RECORD|FCGI_EV_FSTRM_BLK, fconn->conn, fstrm);
+ }
+
+ if (fconn->drl)
+ goto fail;
+
+ end_transfer:
+ fconn->state = FCGI_CS_RECORD_P;
+ fconn->drl += fconn->drp;
+ fconn->drp = 0;
+ ret = MIN(b_data(&fconn->dbuf), fconn->drl);
+ b_del(&fconn->dbuf, ret);
+ fconn->drl -= ret;
+ if (fconn->drl)
+ goto fail;
+
+ fconn->state = FCGI_CS_RECORD_H;
+ TRACE_STATE("switching to RECORD_H", FCGI_EV_RX_RECORD|FCGI_EV_RX_FHDR, fconn->conn, fstrm);
+ TRACE_LEAVE(FCGI_EV_RX_RECORD|FCGI_EV_RX_STDOUT, fconn->conn, fstrm);
+ return 1;
+ fail:
+ TRACE_DEVEL("leaving on missing data or error", FCGI_EV_RX_RECORD|FCGI_EV_RX_STDOUT, fconn->conn, fstrm);
+ return 0;
+}
+
+
+/* Processes an empty STDOUT. Returns > 0 on success, 0 if it couldn't do
+ * anything. It only skip the padding in fact, there is no payload for such
+ * records. It marks the end of the response.
+ */
+static int fcgi_strm_handle_empty_stdout(struct fcgi_conn *fconn, struct fcgi_strm *fstrm)
+{
+ int ret;
+
+ TRACE_ENTER(FCGI_EV_RX_RECORD|FCGI_EV_RX_STDOUT, fconn->conn, fstrm);
+
+ fconn->state = FCGI_CS_RECORD_P;
+ TRACE_STATE("switching to RECORD_P", FCGI_EV_RX_RECORD|FCGI_EV_RX_STDOUT, fconn->conn, fstrm);
+ fconn->drl += fconn->drp;
+ fconn->drp = 0;
+ ret = MIN(b_data(&fconn->dbuf), fconn->drl);
+ b_del(&fconn->dbuf, ret);
+ fconn->drl -= ret;
+ if (fconn->drl) {
+ TRACE_DEVEL("leaving on missing data or error", FCGI_EV_RX_RECORD|FCGI_EV_RX_STDOUT, fconn->conn, fstrm);
+ return 0;
+ }
+ fconn->state = FCGI_CS_RECORD_H;
+ fstrm->flags |= FCGI_SF_ES_RCVD;
+ TRACE_PROTO("FCGI STDOUT record rcvd", FCGI_EV_RX_RECORD|FCGI_EV_RX_STDOUT, fconn->conn, fstrm, 0, (size_t[]){0});
+ TRACE_STATE("stdout data fully send, switching to RECORD_H", FCGI_EV_RX_RECORD|FCGI_EV_RX_FHDR|FCGI_EV_RX_EOI, fconn->conn, fstrm);
+ TRACE_LEAVE(FCGI_EV_RX_RECORD|FCGI_EV_RX_STDOUT, fconn->conn, fstrm);
+ return 1;
+}
+
+/* Processes a STDERR record. Returns > 0 on success, 0 if it couldn't do
+ * anything.
+ */
+static int fcgi_strm_handle_stderr(struct fcgi_conn *fconn, struct fcgi_strm *fstrm)
+{
+ struct buffer *dbuf;
+ struct buffer tag;
+ size_t ret;
+
+ TRACE_ENTER(FCGI_EV_RX_RECORD|FCGI_EV_RX_STDERR, fconn->conn, fstrm);
+ dbuf = &fconn->dbuf;
+
+ /* Only padding remains */
+ if (fconn->state == FCGI_CS_RECORD_P || !fconn->drl)
+ goto end_transfer;
+
+ if (b_data(dbuf) < (fconn->drl + fconn->drp) &&
+ b_size(dbuf) > (fconn->drl + fconn->drp) &&
+ buf_room_for_htx_data(dbuf))
+ goto fail; // incomplete record
+
+ chunk_reset(&trash);
+ ret = b_force_xfer(&trash, dbuf, MIN(b_room(&trash), fconn->drl));
+ if (!ret)
+ goto fail;
+ fconn->drl -= ret;
+ TRACE_PROTO("FCGI STDERR record rcvd", FCGI_EV_RX_RECORD|FCGI_EV_RX_STDERR, fconn->conn, fstrm, 0, (size_t[]){ret});
+
+ trash.area[ret] = '\n';
+ trash.area[ret+1] = '\0';
+ tag.area = fconn->app->name; tag.data = strlen(fconn->app->name);
+ app_log(&fconn->app->loggers, &tag, LOG_ERR, "%s", trash.area);
+
+ if (fconn->drl)
+ goto fail;
+
+ end_transfer:
+ fconn->state = FCGI_CS_RECORD_P;
+ fconn->drl += fconn->drp;
+ fconn->drp = 0;
+ ret = MIN(b_data(&fconn->dbuf), fconn->drl);
+ b_del(&fconn->dbuf, ret);
+ fconn->drl -= ret;
+ if (fconn->drl)
+ goto fail;
+ fconn->state = FCGI_CS_RECORD_H;
+ TRACE_STATE("switching to RECORD_H", FCGI_EV_RX_RECORD|FCGI_EV_RX_FHDR, fconn->conn, fstrm);
+ TRACE_LEAVE(FCGI_EV_RX_RECORD|FCGI_EV_RX_STDERR, fconn->conn, fstrm);
+ return 1;
+ fail:
+ TRACE_DEVEL("leaving on missing data or error", FCGI_EV_RX_RECORD|FCGI_EV_RX_STDERR, fconn->conn, fstrm);
+ return 0;
+}
+
+/* Processes an END_REQUEST record. Returns > 0 on success, 0 if it couldn't do
+ * anything. If the empty STDOUT record is not already received, this one marks
+ * the end of the response. It is highly unexpected, but if the record is larger
+ * than a buffer and cannot be decoded in one time, an error is triggered and
+ * the connection is closed. END_REQUEST record cannot be split.
+ */
+static int fcgi_strm_handle_end_request(struct fcgi_conn *fconn, struct fcgi_strm *fstrm)
+{
+ struct buffer inbuf;
+ struct buffer *dbuf;
+ struct fcgi_end_request endreq;
+
+ TRACE_ENTER(FCGI_EV_RX_RECORD|FCGI_EV_RX_ENDREQ, fconn->conn, fstrm);
+ dbuf = &fconn->dbuf;
+
+ /* Record too large to be fully decoded */
+ if (b_size(dbuf) < (fconn->drl + fconn->drp)) {
+ TRACE_ERROR("END_REQUEST record too large", FCGI_EV_RX_RECORD|FCGI_EV_RX_ENDREQ|FCGI_EV_FSTRM_ERR, fconn->conn, fstrm);
+ goto fail;
+ }
+
+ /* process full record only */
+ if (b_data(dbuf) < (fconn->drl + fconn->drp)) {
+ TRACE_DEVEL("leaving on missing data", FCGI_EV_RX_RECORD|FCGI_EV_RX_ENDREQ, fconn->conn);
+ return 0;
+ }
+
+ if (unlikely(b_contig_data(dbuf, b_head_ofs(dbuf)) < fconn->drl)) {
+ /* Realign the dmux buffer if the record wraps. It is unexpected
+ * at this stage because it should be the first record received
+ * from the FCGI application.
+ */
+ b_slow_realign_ofs(dbuf, trash.area, 0);
+ }
+
+ inbuf = b_make(b_head(dbuf), b_data(dbuf), 0, fconn->drl);
+
+ if (!fcgi_decode_end_request(&inbuf, 0, &endreq)) {
+ TRACE_ERROR("END_REQUEST record decoding failure", FCGI_EV_RX_RECORD|FCGI_EV_RX_ENDREQ|FCGI_EV_FSTRM_ERR, fconn->conn, fstrm);
+ goto fail;
+ }
+
+ fstrm->flags |= FCGI_SF_ES_RCVD;
+ TRACE_STATE("end of script reported", FCGI_EV_RX_RECORD|FCGI_EV_RX_ENDREQ|FCGI_EV_RX_EOI, fconn->conn, fstrm);
+ TRACE_PROTO("FCGI END_REQUEST record rcvd", FCGI_EV_RX_RECORD|FCGI_EV_RX_ENDREQ, fconn->conn, fstrm, 0, (size_t[]){fconn->drl});
+ fstrm->proto_status = endreq.errcode;
+ fcgi_strm_close(fstrm);
+
+ b_del(&fconn->dbuf, fconn->drl + fconn->drp);
+ fconn->drl = 0;
+ fconn->drp = 0;
+ fconn->state = FCGI_CS_RECORD_H;
+ TRACE_STATE("switching to RECORD_H", FCGI_EV_RX_RECORD|FCGI_EV_RX_FHDR, fconn->conn, fstrm);
+ TRACE_LEAVE(FCGI_EV_RX_RECORD|FCGI_EV_RX_ENDREQ, fconn->conn, fstrm);
+ return 1;
+
+ fail:
+ fcgi_strm_error(fstrm);
+ TRACE_DEVEL("leaving on error", FCGI_EV_RX_RECORD|FCGI_EV_RX_ENDREQ|FCGI_EV_FSTRM_ERR, fconn->conn, fstrm);
+ return 0;
+}
+
+/* process Rx records to be demultiplexed */
+static void fcgi_process_demux(struct fcgi_conn *fconn)
+{
+ struct fcgi_strm *fstrm = NULL, *tmp_fstrm;
+ struct fcgi_header hdr;
+ int ret;
+
+ TRACE_ENTER(FCGI_EV_FCONN_WAKE, fconn->conn);
+
+ if (fconn->state == FCGI_CS_CLOSED)
+ return;
+
+ if (unlikely(fconn->state < FCGI_CS_RECORD_H)) {
+ if (fconn->state == FCGI_CS_INIT) {
+ TRACE_STATE("waiting FCGI GET_VALUES to be sent", FCGI_EV_RX_RECORD|FCGI_EV_RX_FHDR|FCGI_EV_RX_GETVAL, fconn->conn);
+ return;
+ }
+ if (fconn->state == FCGI_CS_SETTINGS) {
+ /* ensure that what is pending is a valid GET_VALUES_RESULT record. */
+ TRACE_STATE("receiving FCGI record header", FCGI_EV_RX_RECORD|FCGI_EV_RX_FHDR, fconn->conn);
+ ret = fcgi_decode_record_hdr(&fconn->dbuf, 0, &hdr);
+ if (!ret) {
+ TRACE_ERROR("header record decoding failure", FCGI_EV_RX_RECORD|FCGI_EV_RX_ENDREQ|FCGI_EV_FSTRM_ERR, fconn->conn, fstrm);
+ goto fail;
+ }
+ b_del(&fconn->dbuf, ret);
+
+ if (hdr.id || (hdr.type != FCGI_GET_VALUES_RESULT && hdr.type != FCGI_UNKNOWN_TYPE)) {
+ fconn->state = FCGI_CS_CLOSED;
+ TRACE_ERROR("unexpected record type or flags", FCGI_EV_RX_RECORD|FCGI_EV_RX_FHDR|FCGI_EV_RX_GETVAL|FCGI_EV_FCONN_ERR, fconn->conn);
+ TRACE_STATE("switching to CLOSED", FCGI_EV_RX_RECORD|FCGI_EV_RX_FHDR|FCGI_EV_RX_GETVAL|FCGI_EV_FCONN_ERR, fconn->conn);
+ goto fail;
+ }
+ goto new_record;
+ }
+ }
+
+ /* process as many incoming records as possible below */
+ while (1) {
+ if (!b_data(&fconn->dbuf)) {
+ TRACE_DEVEL("no more Rx data", FCGI_EV_RX_RECORD, fconn->conn);
+ break;
+ }
+
+ if (fconn->state == FCGI_CS_CLOSED) {
+ TRACE_STATE("end of connection reported", FCGI_EV_RX_RECORD|FCGI_EV_RX_EOI, fconn->conn);
+ break;
+ }
+
+ if (fconn->state == FCGI_CS_RECORD_H) {
+ TRACE_PROTO("receiving FCGI record header", FCGI_EV_RX_RECORD|FCGI_EV_RX_FHDR, fconn->conn);
+ ret = fcgi_decode_record_hdr(&fconn->dbuf, 0, &hdr);
+ if (!ret)
+ break;
+ b_del(&fconn->dbuf, ret);
+
+ new_record:
+ fconn->dsi = hdr.id;
+ fconn->drt = hdr.type;
+ fconn->drl = hdr.len;
+ fconn->drp = hdr.padding;
+ fconn->state = FCGI_CS_RECORD_D;
+ TRACE_STATE("FCGI record header rcvd, switching to RECORD_D", FCGI_EV_RX_RECORD|FCGI_EV_RX_FHDR, fconn->conn);
+ }
+
+ /* Only FCGI_CS_RECORD_D or FCGI_CS_RECORD_P */
+ tmp_fstrm = fcgi_conn_st_by_id(fconn, fconn->dsi);
+
+ if (tmp_fstrm != fstrm && fstrm && fcgi_strm_sc(fstrm) &&
+ (b_data(&fstrm->rxbuf) ||
+ fcgi_conn_read0_pending(fconn) ||
+ fstrm->state == FCGI_SS_CLOSED ||
+ (fstrm->flags & FCGI_SF_ES_RCVD) ||
+ se_fl_test(fstrm->sd, SE_FL_ERROR | SE_FL_ERR_PENDING | SE_FL_EOS))) {
+ /* we may have to signal the upper layers */
+ TRACE_DEVEL("notifying stream before switching SID", FCGI_EV_RX_RECORD|FCGI_EV_STRM_WAKE, fconn->conn, fstrm);
+ se_fl_set(fstrm->sd, SE_FL_RCV_MORE);
+ fcgi_strm_notify_recv(fstrm);
+ }
+ fstrm = tmp_fstrm;
+
+ if (fstrm->state == FCGI_SS_CLOSED && fconn->dsi != 0) {
+ /* ignore all record for closed streams */
+ goto ignore_record;
+ }
+ if (fstrm->state == FCGI_SS_IDLE) {
+ /* ignore all record for unknown streams */
+ goto ignore_record;
+ }
+
+ switch (fconn->drt) {
+ case FCGI_GET_VALUES_RESULT:
+ TRACE_PROTO("receiving FCGI GET_VALUES_RESULT record", FCGI_EV_RX_RECORD|FCGI_EV_RX_GETVAL, fconn->conn);
+ ret = fcgi_conn_handle_values_result(fconn);
+ break;
+
+ case FCGI_STDOUT:
+ if (fstrm->flags & FCGI_SF_ES_RCVD)
+ goto ignore_record;
+
+ TRACE_PROTO("receiving FCGI STDOUT record", FCGI_EV_RX_RECORD|FCGI_EV_RX_STDOUT, fconn->conn, fstrm);
+ if (fconn->drl)
+ ret = fcgi_strm_handle_stdout(fconn, fstrm);
+ else
+ ret = fcgi_strm_handle_empty_stdout(fconn, fstrm);
+ break;
+
+ case FCGI_STDERR:
+ TRACE_PROTO("receiving FCGI STDERR record", FCGI_EV_RX_RECORD|FCGI_EV_RX_STDERR, fconn->conn, fstrm);
+ ret = fcgi_strm_handle_stderr(fconn, fstrm);
+ break;
+
+ case FCGI_END_REQUEST:
+ TRACE_PROTO("receiving FCGI END_REQUEST record", FCGI_EV_RX_RECORD|FCGI_EV_RX_ENDREQ, fconn->conn, fstrm);
+ ret = fcgi_strm_handle_end_request(fconn, fstrm);
+ break;
+
+ /* implement all extra record types here */
+ default:
+ ignore_record:
+ /* drop records that we ignore. They may be
+ * larger than the buffer so we drain all of
+ * their contents until we reach the end.
+ */
+ fconn->state = FCGI_CS_RECORD_P;
+ fconn->drl += fconn->drp;
+ fconn->drp = 0;
+ ret = MIN(b_data(&fconn->dbuf), fconn->drl);
+ TRACE_PROTO("receiving FCGI ignored record", FCGI_EV_RX_RECORD, fconn->conn, fstrm, 0, (size_t[]){ret});
+ TRACE_STATE("switching to RECORD_P", FCGI_EV_RX_RECORD, fconn->conn, fstrm);
+ b_del(&fconn->dbuf, ret);
+ fconn->drl -= ret;
+ ret = (fconn->drl == 0);
+ }
+
+ /* error or missing data condition met above ? */
+ if (ret <= 0) {
+ TRACE_DEVEL("insufficient data to proceed", FCGI_EV_RX_RECORD, fconn->conn, fstrm);
+ break;
+ }
+
+ if (fconn->state != FCGI_CS_RECORD_H && !(fconn->drl+fconn->drp)) {
+ fconn->state = FCGI_CS_RECORD_H;
+ TRACE_STATE("switching to RECORD_H", FCGI_EV_RX_RECORD|FCGI_EV_RX_FHDR, fconn->conn);
+ }
+ }
+
+ fail:
+ /* we can go here on missing data, blocked response or error */
+ if (fstrm && fcgi_strm_sc(fstrm) &&
+ (b_data(&fstrm->rxbuf) ||
+ fcgi_conn_read0_pending(fconn) ||
+ fstrm->state == FCGI_SS_CLOSED ||
+ (fstrm->flags & FCGI_SF_ES_RCVD) ||
+ se_fl_test(fstrm->sd, SE_FL_ERROR | SE_FL_ERR_PENDING | SE_FL_EOS))) {
+ /* we may have to signal the upper layers */
+ TRACE_DEVEL("notifying stream before switching SID", FCGI_EV_RX_RECORD|FCGI_EV_STRM_WAKE, fconn->conn, fstrm);
+ se_fl_set(fstrm->sd, SE_FL_RCV_MORE);
+ fcgi_strm_notify_recv(fstrm);
+ }
+
+ fcgi_conn_restart_reading(fconn, 0);
+}
+
+/* process Tx records from streams to be multiplexed. Returns > 0 if it reached
+ * the end.
+ */
+static int fcgi_process_mux(struct fcgi_conn *fconn)
+{
+ struct fcgi_strm *fstrm, *fstrm_back;
+
+ TRACE_ENTER(FCGI_EV_FCONN_WAKE, fconn->conn);
+
+ if (unlikely(fconn->state < FCGI_CS_RECORD_H)) {
+ if (unlikely(fconn->state == FCGI_CS_INIT)) {
+ if (!(fconn->flags & FCGI_CF_GET_VALUES)) {
+ fconn->state = FCGI_CS_RECORD_H;
+ TRACE_STATE("switching to RECORD_H", FCGI_EV_TX_RECORD|FCGI_EV_RX_RECORD|FCGI_EV_RX_FHDR, fconn->conn);
+ fcgi_wake_unassigned_streams(fconn);
+ goto mux;
+ }
+ TRACE_PROTO("sending FCGI GET_VALUES record", FCGI_EV_TX_RECORD|FCGI_EV_TX_GETVAL, fconn->conn);
+ if (unlikely(!fcgi_conn_send_get_values(fconn)))
+ goto fail;
+ fconn->state = FCGI_CS_SETTINGS;
+ TRACE_STATE("switching to SETTINGS", FCGI_EV_TX_RECORD|FCGI_EV_RX_RECORD|FCGI_EV_RX_GETVAL, fconn->conn);
+ }
+ /* need to wait for the other side */
+ if (fconn->state < FCGI_CS_RECORD_H)
+ goto done;
+ }
+
+ mux:
+ list_for_each_entry_safe(fstrm, fstrm_back, &fconn->send_list, send_list) {
+ if (fconn->state == FCGI_CS_CLOSED || fconn->flags & FCGI_CF_MUX_BLOCK_ANY)
+ break;
+
+ if (fstrm->flags & FCGI_SF_NOTIFIED)
+ continue;
+
+ /* If the sender changed his mind and unsubscribed, let's just
+ * remove the stream from the send_list.
+ */
+ if (!(fstrm->flags & (FCGI_SF_WANT_SHUTR|FCGI_SF_WANT_SHUTW)) &&
+ (!fstrm->subs || !(fstrm->subs->events & SUB_RETRY_SEND))) {
+ LIST_DEL_INIT(&fstrm->send_list);
+ continue;
+ }
+
+ if (fstrm->subs && fstrm->subs->events & SUB_RETRY_SEND) {
+ TRACE_POINT(FCGI_EV_STRM_WAKE, fconn->conn, fstrm);
+ fstrm->flags &= ~FCGI_SF_BLK_ANY;
+ fstrm->flags |= FCGI_SF_NOTIFIED;
+ tasklet_wakeup(fstrm->subs->tasklet);
+ fstrm->subs->events &= ~SUB_RETRY_SEND;
+ if (!fstrm->subs->events)
+ fstrm->subs = NULL;
+ } else {
+ /* it's the shut request that was queued */
+ TRACE_POINT(FCGI_EV_STRM_WAKE, fconn->conn, fstrm);
+ tasklet_wakeup(fstrm->shut_tl);
+ }
+ }
+
+ fail:
+ if (fconn->state == FCGI_CS_CLOSED) {
+ if (fconn->stream_cnt - fconn->nb_reserved > 0) {
+ fcgi_conn_send_aborts(fconn);
+ if (fconn->flags & FCGI_CF_MUX_BLOCK_ANY) {
+ TRACE_DEVEL("leaving in blocked situation", FCGI_EV_FCONN_WAKE|FCGI_EV_FCONN_BLK, fconn->conn);
+ return 0;
+ }
+ }
+ }
+
+ done:
+ TRACE_LEAVE(FCGI_EV_FCONN_WAKE, fconn->conn);
+ return 1;
+}
+
+
+/* Attempt to read data, and subscribe if none available.
+ * The function returns 1 if data has been received, otherwise zero.
+ */
+static int fcgi_recv(struct fcgi_conn *fconn)
+{
+ struct connection *conn = fconn->conn;
+ struct buffer *buf;
+ int max;
+ size_t ret;
+
+ TRACE_ENTER(FCGI_EV_FCONN_RECV, conn);
+
+ if (fconn->wait_event.events & SUB_RETRY_RECV) {
+ TRACE_DEVEL("leaving on sub_recv", FCGI_EV_FCONN_RECV, conn);
+ return (b_data(&fconn->dbuf));
+ }
+
+ if (!fcgi_recv_allowed(fconn)) {
+ TRACE_DEVEL("leaving on !recv_allowed", FCGI_EV_FCONN_RECV, conn);
+ return 1;
+ }
+
+ buf = fcgi_get_buf(fconn, &fconn->dbuf);
+ if (!buf) {
+ TRACE_DEVEL("waiting for fconn dbuf allocation", FCGI_EV_FCONN_RECV|FCGI_EV_FCONN_BLK, conn);
+ fconn->flags |= FCGI_CF_DEM_DALLOC;
+ return 0;
+ }
+
+ if (!b_data(buf)) {
+ /* try to pre-align the buffer like the
+ * rxbufs will be to optimize memory copies. We'll make
+ * sure that the record header lands at the end of the
+ * HTX block to alias it upon recv. We cannot use the
+ * head because rcv_buf() will realign the buffer if
+ * it's empty. Thus we cheat and pretend we already
+ * have a few bytes there.
+ */
+ max = buf_room_for_htx_data(buf) + (fconn->state == FCGI_CS_RECORD_H ? FCGI_RECORD_HEADER_SZ : 0);
+ buf->head = sizeof(struct htx) - (fconn->state == FCGI_CS_RECORD_H ? FCGI_RECORD_HEADER_SZ : 0);
+ }
+ else
+ max = buf_room_for_htx_data(buf);
+
+ ret = max ? conn->xprt->rcv_buf(conn, conn->xprt_ctx, buf, max, 0) : 0;
+
+ if (max && !ret && fcgi_recv_allowed(fconn)) {
+ TRACE_DATA("failed to receive data, subscribing", FCGI_EV_FCONN_RECV, conn);
+ conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_RECV, &fconn->wait_event);
+ }
+ else
+ TRACE_DATA("recv data", FCGI_EV_FCONN_RECV, conn, 0, 0, (size_t[]){ret});
+
+ if (conn_xprt_read0_pending(conn)) {
+ TRACE_DATA("received read0", FCGI_EV_FCONN_RECV, conn);
+ fconn->flags |= FCGI_CF_EOS;
+ }
+ if (conn->flags & CO_FL_ERROR) {
+ TRACE_DATA("connection error", FCGI_EV_FCONN_RECV, conn);
+ fconn->flags |= FCGI_CF_ERROR;
+ }
+
+ if (!b_data(buf)) {
+ fcgi_release_buf(fconn, &fconn->dbuf);
+ goto end;
+ }
+
+ if (ret == max) {
+ TRACE_DEVEL("fconn dbuf full", FCGI_EV_FCONN_RECV|FCGI_EV_FCONN_BLK, conn);
+ fconn->flags |= FCGI_CF_DEM_DFULL;
+ }
+
+end:
+ TRACE_LEAVE(FCGI_EV_FCONN_RECV, conn);
+ return !!ret || (fconn->flags & (FCGI_CF_EOS|FCGI_CF_ERROR));
+}
+
+
+/* Try to send data if possible.
+ * The function returns 1 if data have been sent, otherwise zero.
+ */
+static int fcgi_send(struct fcgi_conn *fconn)
+{
+ struct connection *conn = fconn->conn;
+ int done;
+ int sent = 0;
+
+ TRACE_ENTER(FCGI_EV_FCONN_SEND, conn);
+
+ if (fconn->flags & (FCGI_CF_ERROR|FCGI_CF_ERR_PENDING)) {
+ TRACE_DEVEL("leaving on connection error", FCGI_EV_FCONN_SEND, conn);
+ if (fconn->flags & FCGI_CF_EOS)
+ fconn->flags |= FCGI_CF_ERROR;
+ b_reset(br_tail(fconn->mbuf));
+ return 1;
+ }
+
+
+ if (conn->flags & CO_FL_WAIT_XPRT) {
+ /* a handshake was requested */
+ goto schedule;
+ }
+
+ /* This loop is quite simple : it tries to fill as much as it can from
+ * pending streams into the existing buffer until it's reportedly full
+ * or the end of send requests is reached. Then it tries to send this
+ * buffer's contents out, marks it not full if at least one byte could
+ * be sent, and tries again.
+ *
+ * The snd_buf() function normally takes a "flags" argument which may
+ * be made of a combination of CO_SFL_MSG_MORE to indicate that more
+ * data immediately comes and CO_SFL_STREAMER to indicate that the
+ * connection is streaming lots of data (used to increase TLS record
+ * size at the expense of latency). The former can be sent any time
+ * there's a buffer full flag, as it indicates at least one stream
+ * attempted to send and failed so there are pending data. An
+ * alternative would be to set it as long as there's an active stream
+ * but that would be problematic for ACKs until we have an absolute
+ * guarantee that all waiters have at least one byte to send. The
+ * latter should possibly not be set for now.
+ */
+
+ done = 0;
+ while (!done) {
+ unsigned int flags = 0;
+ unsigned int released = 0;
+ struct buffer *buf;
+
+ /* fill as much as we can into the current buffer */
+ while (((fconn->flags & (FCGI_CF_MUX_MFULL|FCGI_CF_MUX_MALLOC)) == 0) && !done)
+ done = fcgi_process_mux(fconn);
+
+ if (fconn->flags & FCGI_CF_MUX_MALLOC)
+ done = 1; // we won't go further without extra buffers
+
+ if (conn->flags & CO_FL_ERROR)
+ break;
+
+ if (fconn->flags & (FCGI_CF_MUX_MFULL | FCGI_CF_DEM_MROOM))
+ flags |= CO_SFL_MSG_MORE;
+
+ for (buf = br_head(fconn->mbuf); b_size(buf); buf = br_del_head(fconn->mbuf)) {
+ if (b_data(buf)) {
+ int ret;
+
+ ret = conn->xprt->snd_buf(conn, conn->xprt_ctx, buf, b_data(buf), flags);
+ if (!ret) {
+ done = 1;
+ break;
+ }
+ sent = 1;
+ TRACE_DATA("send data", FCGI_EV_FCONN_SEND, conn, 0, 0, (size_t[]){ret});
+ b_del(buf, ret);
+ if (b_data(buf)) {
+ done = 1;
+ break;
+ }
+ }
+ b_free(buf);
+ released++;
+ }
+
+ if (released)
+ offer_buffers(NULL, released);
+
+ /* wrote at least one byte, the buffer is not full anymore */
+ if (fconn->flags & (FCGI_CF_MUX_MFULL | FCGI_CF_DEM_MROOM))
+ TRACE_STATE("fconn mbuf ring not fill anymore", FCGI_EV_FCONN_SEND|FCGI_EV_FCONN_BLK, conn);
+ fconn->flags &= ~(FCGI_CF_MUX_MFULL | FCGI_CF_DEM_MROOM);
+ }
+
+ if (conn->flags & CO_FL_ERROR) {
+ fconn->flags |= FCGI_CF_ERR_PENDING;
+ if (fconn->flags & FCGI_CF_EOS)
+ fconn->flags |= FCGI_CF_ERROR;
+ b_reset(br_tail(fconn->mbuf));
+ }
+
+ /* We're not full anymore, so we can wake any task that are waiting
+ * for us.
+ */
+ if (!(fconn->flags & (FCGI_CF_MUX_MFULL | FCGI_CF_DEM_MROOM)) && fconn->state >= FCGI_CS_RECORD_H) {
+ struct fcgi_strm *fstrm;
+
+ list_for_each_entry(fstrm, &fconn->send_list, send_list) {
+ if (fconn->state == FCGI_CS_CLOSED || fconn->flags & FCGI_CF_MUX_BLOCK_ANY)
+ break;
+
+ if (fstrm->flags & FCGI_SF_NOTIFIED)
+ continue;
+
+ /* If the sender changed his mind and unsubscribed, let's just
+ * remove the stream from the send_list.
+ */
+ if (!(fstrm->flags & (FCGI_SF_WANT_SHUTR|FCGI_SF_WANT_SHUTW)) &&
+ (!fstrm->subs || !(fstrm->subs->events & SUB_RETRY_SEND))) {
+ LIST_DEL_INIT(&fstrm->send_list);
+ continue;
+ }
+
+ if (fstrm->subs && fstrm->subs->events & SUB_RETRY_SEND) {
+ TRACE_DEVEL("waking up pending stream", FCGI_EV_FCONN_SEND|FCGI_EV_STRM_WAKE, conn, fstrm);
+ fstrm->flags &= ~FCGI_SF_BLK_ANY;
+ fstrm->flags |= FCGI_SF_NOTIFIED;
+ tasklet_wakeup(fstrm->subs->tasklet);
+ fstrm->subs->events &= ~SUB_RETRY_SEND;
+ if (!fstrm->subs->events)
+ fstrm->subs = NULL;
+ } else {
+ /* it's the shut request that was queued */
+ TRACE_POINT(FCGI_EV_STRM_WAKE, fconn->conn, fstrm);
+ tasklet_wakeup(fstrm->shut_tl);
+ }
+ }
+ }
+ /* We're done, no more to send */
+ if (!br_data(fconn->mbuf)) {
+ TRACE_DEVEL("leaving with everything sent", FCGI_EV_FCONN_SEND, conn);
+ goto end;
+ }
+schedule:
+ if (!(conn->flags & CO_FL_ERROR) && !(fconn->wait_event.events & SUB_RETRY_SEND)) {
+ TRACE_STATE("more data to send, subscribing", FCGI_EV_FCONN_SEND, conn);
+ conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_SEND, &fconn->wait_event);
+ }
+
+ TRACE_DEVEL("leaving with some data left to send", FCGI_EV_FCONN_SEND, conn);
+end:
+ return sent || (fconn->flags & (FCGI_CF_ERR_PENDING|FCGI_CF_ERROR));
+}
+
+/* this is the tasklet referenced in fconn->wait_event.tasklet */
+struct task *fcgi_io_cb(struct task *t, void *ctx, unsigned int state)
+{
+ struct connection *conn;
+ struct fcgi_conn *fconn = ctx;
+ struct tasklet *tl = (struct tasklet *)t;
+ int conn_in_list;
+ int ret = 0;
+
+ if (state & TASK_F_USR1) {
+ /* the tasklet was idling on an idle connection, it might have
+ * been stolen, let's be careful!
+ */
+ HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
+ if (tl->context == NULL) {
+ /* The connection has been taken over by another thread,
+ * we're no longer responsible for it, so just free the
+ * tasklet, and do nothing.
+ */
+ HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
+ tasklet_free(tl);
+ return NULL;
+ }
+ conn = fconn->conn;
+ TRACE_POINT(FCGI_EV_FCONN_WAKE, conn);
+
+ conn_in_list = conn->flags & CO_FL_LIST_MASK;
+ if (conn_in_list)
+ conn_delete_from_tree(conn);
+
+ HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
+ } else {
+ /* we're certain the connection was not in an idle list */
+ conn = fconn->conn;
+ TRACE_ENTER(FCGI_EV_FCONN_WAKE, conn);
+ conn_in_list = 0;
+ }
+
+ if (!(fconn->wait_event.events & SUB_RETRY_SEND))
+ ret = fcgi_send(fconn);
+ if (!(fconn->wait_event.events & SUB_RETRY_RECV))
+ ret |= fcgi_recv(fconn);
+ if (ret || b_data(&fconn->dbuf))
+ ret = fcgi_process(fconn);
+
+ /* If we were in an idle list, we want to add it back into it,
+ * unless fcgi_process() returned -1, which mean it has destroyed
+ * the connection (testing !ret is enough, if fcgi_process() wasn't
+ * called then ret will be 0 anyway.
+ */
+ if (ret < 0)
+ t = NULL;
+
+ if (!ret && conn_in_list) {
+ struct server *srv = objt_server(conn->target);
+
+ HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
+ _srv_add_idle(srv, conn, conn_in_list == CO_FL_SAFE_LIST);
+ HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
+ }
+ return t;
+}
+
+/* callback called on any event by the connection handler.
+ * It applies changes and returns zero, or < 0 if it wants immediate
+ * destruction of the connection (which normally doesn not happen in FCGI).
+ */
+static int fcgi_process(struct fcgi_conn *fconn)
+{
+ struct connection *conn = fconn->conn;
+
+ TRACE_POINT(FCGI_EV_FCONN_WAKE, conn);
+
+ if (b_data(&fconn->dbuf) && !(fconn->flags & FCGI_CF_DEM_BLOCK_ANY)) {
+ fcgi_process_demux(fconn);
+
+ if (fconn->state == FCGI_CS_CLOSED || (fconn->flags & FCGI_CF_ERROR))
+ b_reset(&fconn->dbuf);
+
+ if (buf_room_for_htx_data(&fconn->dbuf))
+ fconn->flags &= ~FCGI_CF_DEM_DFULL;
+ }
+ fcgi_send(fconn);
+
+ if (unlikely(fconn->proxy->flags & (PR_FL_DISABLED|PR_FL_STOPPED))) {
+ /* frontend is stopping, reload likely in progress, let's try
+ * to announce a graceful shutdown if not yet done. We don't
+ * care if it fails, it will be tried again later.
+ */
+ TRACE_STATE("proxy stopped, sending ABORT to all streams", FCGI_EV_FCONN_WAKE|FCGI_EV_TX_RECORD, conn);
+ if (!(fconn->flags & (FCGI_CF_ABRTS_SENT|FCGI_CF_ABRTS_FAILED))) {
+ if (fconn->stream_cnt - fconn->nb_reserved > 0)
+ fcgi_conn_send_aborts(fconn);
+ }
+ }
+
+ /*
+ * If we received early data, and the handshake is done, wake
+ * any stream that was waiting for it.
+ */
+ if (!(fconn->flags & FCGI_CF_WAIT_FOR_HS) &&
+ (conn->flags & (CO_FL_EARLY_SSL_HS | CO_FL_WAIT_XPRT | CO_FL_EARLY_DATA)) == CO_FL_EARLY_DATA) {
+ struct eb32_node *node;
+ struct fcgi_strm *fstrm;
+
+ fconn->flags |= FCGI_CF_WAIT_FOR_HS;
+ node = eb32_lookup_ge(&fconn->streams_by_id, 1);
+
+ while (node) {
+ fstrm = container_of(node, struct fcgi_strm, by_id);
+ if (fcgi_strm_sc(fstrm) && se_fl_test(fstrm->sd, SE_FL_WAIT_FOR_HS))
+ fcgi_strm_notify_recv(fstrm);
+ node = eb32_next(node);
+ }
+ }
+
+ if ((fconn->flags & FCGI_CF_ERROR) || fcgi_conn_read0_pending(fconn) ||
+ fconn->state == FCGI_CS_CLOSED || (fconn->flags & FCGI_CF_ABRTS_FAILED) ||
+ eb_is_empty(&fconn->streams_by_id)) {
+ fcgi_wake_some_streams(fconn, 0);
+
+ if (eb_is_empty(&fconn->streams_by_id)) {
+ /* no more stream, kill the connection now */
+ fcgi_release(fconn);
+ TRACE_DEVEL("leaving after releasing the connection", FCGI_EV_FCONN_WAKE);
+ return -1;
+ }
+ }
+
+ if (!b_data(&fconn->dbuf))
+ fcgi_release_buf(fconn, &fconn->dbuf);
+
+ if (fconn->state == FCGI_CS_CLOSED || (fconn->flags & FCGI_CF_ABRTS_FAILED) ||
+ (!br_data(fconn->mbuf) && ((fconn->flags & FCGI_CF_MUX_BLOCK_ANY) || LIST_ISEMPTY(&fconn->send_list))))
+ fcgi_release_mbuf(fconn);
+
+ if (fconn->task) {
+ fconn->task->expire = tick_add(now_ms, (fconn->state == FCGI_CS_CLOSED ? fconn->shut_timeout : fconn->timeout));
+ task_queue(fconn->task);
+ }
+
+ fcgi_send(fconn);
+ TRACE_LEAVE(FCGI_EV_FCONN_WAKE, conn);
+ return 0;
+}
+
+
+/* wake-up function called by the connection layer (mux_ops.wake) */
+static int fcgi_wake(struct connection *conn)
+{
+ struct fcgi_conn *fconn = conn->ctx;
+
+ TRACE_POINT(FCGI_EV_FCONN_WAKE, conn);
+ return (fcgi_process(fconn));
+}
+
+
+static int fcgi_ctl(struct connection *conn, enum mux_ctl_type mux_ctl, void *output)
+{
+ int ret = 0;
+ switch (mux_ctl) {
+ case MUX_CTL_STATUS:
+ if (!(conn->flags & CO_FL_WAIT_XPRT))
+ ret |= MUX_STATUS_READY;
+ return ret;
+ case MUX_CTL_EXIT_STATUS:
+ return MUX_ES_UNKNOWN;
+ default:
+ return -1;
+ }
+}
+
+static int fcgi_sctl(struct stconn *sc, enum mux_sctl_type mux_sctl, void *output)
+{
+ int ret = 0;
+ struct fcgi_strm *fstrm = __sc_mux_strm(sc);
+
+ switch (mux_sctl) {
+ case MUX_SCTL_SID:
+ if (output)
+ *((int64_t *)output) = fstrm->id;
+ return ret;
+
+ default:
+ return -1;
+ }
+}
+
+/* Connection timeout management. The principle is that if there's no receipt
+ * nor sending for a certain amount of time, the connection is closed. If the
+ * MUX buffer still has lying data or is not allocatable, the connection is
+ * immediately killed. If it's allocatable and empty, we attempt to send a
+ * ABORT records.
+ */
+struct task *fcgi_timeout_task(struct task *t, void *context, unsigned int state)
+{
+ struct fcgi_conn *fconn = context;
+ int expired = tick_is_expired(t->expire, now_ms);
+
+ TRACE_ENTER(FCGI_EV_FCONN_WAKE, (fconn ? fconn->conn : NULL));
+
+ if (fconn) {
+ HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
+
+ /* Somebody already stole the connection from us, so we should not
+ * free it, we just have to free the task.
+ */
+ if (!t->context) {
+ HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
+ fconn = NULL;
+ goto do_leave;
+ }
+
+ if (!expired) {
+ HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
+ TRACE_DEVEL("leaving (not expired)", FCGI_EV_FCONN_WAKE, fconn->conn);
+ return t;
+ }
+
+ /* We're about to destroy the connection, so make sure nobody attempts
+ * to steal it from us.
+ */
+ if (fconn->conn->flags & CO_FL_LIST_MASK)
+ conn_delete_from_tree(fconn->conn);
+
+ HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
+ }
+
+do_leave:
+ task_destroy(t);
+
+ if (!fconn) {
+ /* resources were already deleted */
+ TRACE_DEVEL("leaving (not more fconn)", FCGI_EV_FCONN_WAKE);
+ return NULL;
+ }
+
+ fconn->task = NULL;
+ fconn->state = FCGI_CS_CLOSED;
+ fcgi_wake_some_streams(fconn, 0);
+
+ if (br_data(fconn->mbuf)) {
+ /* don't even try to send aborts, the buffer is stuck */
+ fconn->flags |= FCGI_CF_ABRTS_FAILED;
+ goto end;
+ }
+
+ /* try to send but no need to insist */
+ if (!fcgi_conn_send_aborts(fconn))
+ fconn->flags |= FCGI_CF_ABRTS_FAILED;
+
+ if (br_data(fconn->mbuf) && !(fconn->flags & FCGI_CF_ABRTS_FAILED) &&
+ conn_xprt_ready(fconn->conn)) {
+ unsigned int released = 0;
+ struct buffer *buf;
+
+ for (buf = br_head(fconn->mbuf); b_size(buf); buf = br_del_head(fconn->mbuf)) {
+ if (b_data(buf)) {
+ int ret = fconn->conn->xprt->snd_buf(fconn->conn, fconn->conn->xprt_ctx,
+ buf, b_data(buf), 0);
+ if (!ret)
+ break;
+ b_del(buf, ret);
+ if (b_data(buf))
+ break;
+ b_free(buf);
+ released++;
+ }
+ }
+
+ if (released)
+ offer_buffers(NULL, released);
+ }
+
+ end:
+ /* either we can release everything now or it will be done later once
+ * the last stream closes.
+ */
+ if (eb_is_empty(&fconn->streams_by_id))
+ fcgi_release(fconn);
+
+ TRACE_LEAVE(FCGI_EV_FCONN_WAKE);
+ return NULL;
+}
+
+
+/*******************************************/
+/* functions below are used by the streams */
+/*******************************************/
+
+/* Append the description of what is present in error snapshot <es> into <out>.
+ * The description must be small enough to always fit in a buffer. The output
+ * buffer may be the trash so the trash must not be used inside this function.
+ */
+static void fcgi_show_error_snapshot(struct buffer *out, const struct error_snapshot *es)
+{
+ chunk_appendf(out,
+ " FCGI connection flags 0x%08x, FCGI stream flags 0x%08x\n"
+ " H1 msg state %s(%d), H1 msg flags 0x%08x\n"
+ " H1 chunk len %lld bytes, H1 body len %lld bytes :\n",
+ es->ctx.h1.c_flags, es->ctx.h1.s_flags,
+ h1m_state_str(es->ctx.h1.state), es->ctx.h1.state,
+ es->ctx.h1.m_flags, es->ctx.h1.m_clen, es->ctx.h1.m_blen);
+}
+/*
+ * Capture a bad response and archive it in the proxy's structure. By default
+ * it tries to report the error position as h1m->err_pos. However if this one is
+ * not set, it will then report h1m->next, which is the last known parsing
+ * point. The function is able to deal with wrapping buffers. It always displays
+ * buffers as a contiguous area starting at buf->p. The direction is determined
+ * thanks to the h1m's flags.
+ */
+static void fcgi_strm_capture_bad_message(struct fcgi_conn *fconn, struct fcgi_strm *fstrm,
+ struct h1m *h1m, struct buffer *buf)
+{
+ struct session *sess = fstrm->sess;
+ struct proxy *proxy = fconn->proxy;
+ struct proxy *other_end;
+ union error_snapshot_ctx ctx;
+
+ if (fcgi_strm_sc(fstrm) && sc_strm(fcgi_strm_sc(fstrm))) {
+ if (sess == NULL)
+ sess = __sc_strm(fcgi_strm_sc(fstrm))->sess;
+ if (!(h1m->flags & H1_MF_RESP))
+ other_end = __sc_strm(fcgi_strm_sc(fstrm))->be;
+ else
+ other_end = sess->fe;
+ } else
+ other_end = NULL;
+ /* http-specific part now */
+ ctx.h1.state = h1m->state;
+ ctx.h1.c_flags = fconn->flags;
+ ctx.h1.s_flags = fstrm->flags;
+ ctx.h1.m_flags = h1m->flags;
+ ctx.h1.m_clen = h1m->curr_len;
+ ctx.h1.m_blen = h1m->body_len;
+
+ proxy_capture_error(proxy, 1, other_end, fconn->conn->target, sess, buf, 0, 0,
+ (h1m->err_pos >= 0) ? h1m->err_pos : h1m->next,
+ &ctx, fcgi_show_error_snapshot);
+}
+
+static size_t fcgi_strm_parse_headers(struct fcgi_strm *fstrm, struct h1m *h1m, struct htx *htx,
+ struct buffer *buf, size_t *ofs, size_t max)
+{
+ int ret;
+
+ TRACE_ENTER(FCGI_EV_RSP_DATA|FCGI_EV_RSP_HDRS, fstrm->fconn->conn, fstrm, 0, (size_t[]){max});
+ ret = h1_parse_msg_hdrs(h1m, NULL, htx, buf, *ofs, max);
+ if (ret <= 0) {
+ TRACE_DEVEL("leaving on missing data or error", FCGI_EV_RSP_DATA|FCGI_EV_RSP_HDRS, fstrm->fconn->conn, fstrm);
+ if (htx->flags & HTX_FL_PARSING_ERROR) {
+ TRACE_ERROR("parsing error, reject H1 response", FCGI_EV_RSP_DATA|FCGI_EV_RSP_HDRS|FCGI_EV_FSTRM_ERR, fstrm->fconn->conn, fstrm);
+ fcgi_strm_error(fstrm);
+ fcgi_strm_capture_bad_message(fstrm->fconn, fstrm, h1m, buf);
+ }
+ ret = 0;
+ goto end;
+ }
+
+ /* Reject any message with an unknown transfer-encoding. In fact if any
+ * encoding other than "chunked". A 422-Unprocessable-Content is
+ * returned for an invalid request, a 502-Bad-Gateway for an invalid
+ * response.
+ */
+ if (h1m->flags & H1_MF_TE_OTHER) {
+ htx->flags |= HTX_FL_PARSING_ERROR;
+ TRACE_ERROR("Unknown transfer-encoding", FCGI_EV_RSP_DATA|FCGI_EV_RSP_HDRS|FCGI_EV_FSTRM_ERR, fstrm->fconn->conn, fstrm);
+ fcgi_strm_error(fstrm);
+ fcgi_strm_capture_bad_message(fstrm->fconn, fstrm, h1m, buf);
+ ret = 0;
+ goto end;
+ }
+
+ *ofs += ret;
+ end:
+ TRACE_LEAVE(FCGI_EV_RSP_DATA|FCGI_EV_RSP_HDRS, fstrm->fconn->conn, fstrm, 0, (size_t[]){ret});
+ return ret;
+
+}
+
+static size_t fcgi_strm_parse_data(struct fcgi_strm *fstrm, struct h1m *h1m, struct htx **htx,
+ struct buffer *buf, size_t *ofs, size_t max, struct buffer *htxbuf)
+{
+ size_t ret;
+
+ TRACE_ENTER(FCGI_EV_RSP_DATA|FCGI_EV_RSP_BODY, fstrm->fconn->conn, fstrm, 0, (size_t[]){max});
+ ret = h1_parse_msg_data(h1m, htx, buf, *ofs, max, htxbuf);
+ if (!ret) {
+ TRACE_DEVEL("leaving on missing data or error", FCGI_EV_RSP_DATA|FCGI_EV_RSP_BODY, fstrm->fconn->conn, fstrm);
+ if ((*htx)->flags & HTX_FL_PARSING_ERROR) {
+ TRACE_ERROR("parsing error, reject H1 response", FCGI_EV_RSP_DATA|FCGI_EV_RSP_BODY|FCGI_EV_FSTRM_ERR, fstrm->fconn->conn, fstrm);
+ fcgi_strm_error(fstrm);
+ fcgi_strm_capture_bad_message(fstrm->fconn, fstrm, h1m, buf);
+ }
+ goto end;
+ }
+ *ofs += ret;
+ end:
+ TRACE_LEAVE(FCGI_EV_RSP_DATA|FCGI_EV_RSP_BODY, fstrm->fconn->conn, fstrm, 0, (size_t[]){ret});
+ return ret;
+}
+
+static size_t fcgi_strm_parse_trailers(struct fcgi_strm *fstrm, struct h1m *h1m, struct htx *htx,
+ struct buffer *buf, size_t *ofs, size_t max)
+{
+ int ret;
+
+ TRACE_ENTER(FCGI_EV_RSP_DATA|FCGI_EV_RSP_TLRS, fstrm->fconn->conn, fstrm, 0, (size_t[]){max});
+ ret = h1_parse_msg_tlrs(h1m, htx, buf, *ofs, max);
+ if (ret <= 0) {
+ TRACE_DEVEL("leaving on missing data or error", FCGI_EV_RSP_DATA|FCGI_EV_RSP_TLRS, fstrm->fconn->conn, fstrm);
+ if (htx->flags & HTX_FL_PARSING_ERROR) {
+ TRACE_ERROR("parsing error, reject H1 response", FCGI_EV_RSP_DATA|FCGI_EV_RSP_TLRS|FCGI_EV_FSTRM_ERR, fstrm->fconn->conn, fstrm);
+ fcgi_strm_error(fstrm);
+ fcgi_strm_capture_bad_message(fstrm->fconn, fstrm, h1m, buf);
+ }
+ ret = 0;
+ goto end;
+ }
+ *ofs += ret;
+ end:
+ TRACE_LEAVE(FCGI_EV_RSP_DATA|FCGI_EV_RSP_TLRS, fstrm->fconn->conn, fstrm, 0, (size_t[]){ret});
+ return ret;
+}
+
+static size_t fcgi_strm_parse_response(struct fcgi_strm *fstrm, struct buffer *buf, size_t count)
+{
+ struct fcgi_conn *fconn = fstrm->fconn;
+ struct htx *htx;
+ struct h1m *h1m = &fstrm->h1m;
+ size_t ret, data, total = 0;
+
+ htx = htx_from_buf(buf);
+ TRACE_ENTER(FCGI_EV_RSP_DATA, fconn->conn, fstrm, htx, (size_t[]){count});
+
+ data = htx->data;
+ if (fstrm->state == FCGI_SS_ERROR)
+ goto end;
+
+ do {
+ size_t used = htx_used_space(htx);
+
+ if (h1m->state <= H1_MSG_LAST_LF) {
+ TRACE_PROTO("parsing response headers", FCGI_EV_RSP_DATA|FCGI_EV_RSP_HDRS, fconn->conn, fstrm);
+ ret = fcgi_strm_parse_headers(fstrm, h1m, htx, &fstrm->rxbuf, &total, count);
+ if (!ret)
+ break;
+
+ TRACE_USER("rcvd H1 response headers", FCGI_EV_RSP_DATA|FCGI_EV_RSP_HDRS, fconn->conn, fstrm, htx);
+
+ if ((h1m->flags & (H1_MF_VER_11|H1_MF_XFER_LEN)) == H1_MF_VER_11) {
+ struct htx_blk *blk = htx_get_head_blk(htx);
+ struct htx_sl *sl;
+
+ if (!blk)
+ break;
+ sl = htx_get_blk_ptr(htx, blk);
+ sl->flags |= HTX_SL_F_XFER_LEN;
+ htx->extra = 0;
+ }
+ }
+ else if (h1m->state < H1_MSG_TRAILERS) {
+ TRACE_PROTO("parsing response payload", FCGI_EV_RSP_DATA|FCGI_EV_RSP_BODY, fconn->conn, fstrm);
+ fcgi_strm_parse_data(fstrm, h1m, &htx, &fstrm->rxbuf, &total, count, buf);
+
+ if (!(h1m->flags & H1_MF_XFER_LEN) && fstrm->state != FCGI_SS_ERROR &&
+ (fstrm->flags & FCGI_SF_ES_RCVD) && b_data(&fstrm->rxbuf) == total) {
+ TRACE_DEVEL("end of data", FCGI_EV_RSP_DATA, fconn->conn, fstrm);
+ if (htx_is_empty(htx) && !htx_add_endof(htx, HTX_BLK_EOT))
+ break;
+ htx->flags |= HTX_FL_EOM;
+ h1m->state = H1_MSG_DONE;
+ TRACE_USER("H1 response fully rcvd", FCGI_EV_RSP_DATA|FCGI_EV_RSP_EOM, fconn->conn, fstrm, htx);
+ }
+
+ if (h1m->state < H1_MSG_TRAILERS)
+ break;
+
+ TRACE_PROTO("rcvd response payload data", FCGI_EV_RSP_DATA|FCGI_EV_RSP_BODY, fconn->conn, fstrm, htx);
+ }
+ else if (h1m->state == H1_MSG_TRAILERS) {
+ TRACE_PROTO("parsing response trailers", FCGI_EV_RSP_DATA|FCGI_EV_RSP_TLRS, fconn->conn, fstrm);
+ fcgi_strm_parse_trailers(fstrm, h1m, htx, &fstrm->rxbuf, &total, count);
+ if (h1m->state != H1_MSG_DONE)
+ break;
+
+ TRACE_PROTO("rcvd H1 response trailers", FCGI_EV_RSP_DATA|FCGI_EV_RSP_TLRS, fconn->conn, fstrm, htx);
+ }
+ else if (h1m->state == H1_MSG_DONE) {
+ TRACE_USER("H1 response fully rcvd", FCGI_EV_RSP_DATA|FCGI_EV_RSP_EOM, fconn->conn, fstrm, htx);
+ if (b_data(&fstrm->rxbuf) > total) {
+ htx->flags |= HTX_FL_PARSING_ERROR;
+ TRACE_PROTO("too much data, parsing error", FCGI_EV_RSP_DATA, fconn->conn, fstrm);
+ fcgi_strm_error(fstrm);
+ }
+ break;
+ }
+ else {
+ htx->flags |= HTX_FL_PROCESSING_ERROR;
+ TRACE_ERROR("unexpected processing error", FCGI_EV_RSP_DATA|FCGI_EV_STRM_ERR, fconn->conn, fstrm);
+ fcgi_strm_error(fstrm);
+ break;
+ }
+
+ count -= htx_used_space(htx) - used;
+ } while (fstrm->state != FCGI_SS_ERROR);
+
+ if (fstrm->state == FCGI_SS_ERROR) {
+ b_reset(&fstrm->rxbuf);
+ htx_to_buf(htx, buf);
+ TRACE_DEVEL("leaving on error", FCGI_EV_RSP_DATA|FCGI_EV_STRM_ERR, fconn->conn, fstrm);
+ return 0;
+ }
+
+ b_del(&fstrm->rxbuf, total);
+
+ end:
+ htx_to_buf(htx, buf);
+ ret = htx->data - data;
+ TRACE_LEAVE(FCGI_EV_RSP_DATA, fconn->conn, fstrm, htx, (size_t[]){ret});
+ return ret;
+}
+
+/*
+ * Attach a new stream to a connection
+ * (Used for outgoing connections)
+ */
+static int fcgi_attach(struct connection *conn, struct sedesc *sd, struct session *sess)
+{
+ struct fcgi_strm *fstrm;
+ struct fcgi_conn *fconn = conn->ctx;
+
+ TRACE_ENTER(FCGI_EV_FSTRM_NEW, conn);
+ fstrm = fcgi_stconn_new(fconn, sd->sc, sess);
+ if (!fstrm)
+ goto err;
+
+ /* the connection is not idle anymore, let's mark this */
+ HA_ATOMIC_AND(&fconn->wait_event.tasklet->state, ~TASK_F_USR1);
+ xprt_set_used(conn, conn->xprt, conn->xprt_ctx);
+
+ TRACE_LEAVE(FCGI_EV_FSTRM_NEW, conn, fstrm);
+ return 0;
+
+ err:
+ TRACE_DEVEL("leaving on error", FCGI_EV_FSTRM_NEW|FCGI_EV_FSTRM_ERR, conn);
+ return -1;
+}
+
+/* Retrieves the first valid stream connector from this connection, or returns NULL.
+ * We have to scan because we may have some orphan streams. It might be
+ * beneficial to scan backwards from the end to reduce the likeliness to find
+ * orphans.
+ */
+static struct stconn *fcgi_get_first_sc(const struct connection *conn)
+{
+ struct fcgi_conn *fconn = conn->ctx;
+ struct fcgi_strm *fstrm;
+ struct eb32_node *node;
+
+ node = eb32_first(&fconn->streams_by_id);
+ while (node) {
+ fstrm = container_of(node, struct fcgi_strm, by_id);
+ if (fcgi_strm_sc(fstrm))
+ return fcgi_strm_sc(fstrm);
+ node = eb32_next(node);
+ }
+ return NULL;
+}
+
+/*
+ * Destroy the mux and the associated connection, if it is no longer used
+ */
+static void fcgi_destroy(void *ctx)
+{
+ struct fcgi_conn *fconn = ctx;
+
+ TRACE_POINT(FCGI_EV_FCONN_END, fconn->conn);
+ if (eb_is_empty(&fconn->streams_by_id)) {
+ BUG_ON(fconn->conn->ctx != fconn);
+ fcgi_release(fconn);
+ }
+}
+
+/*
+ * Detach the stream from the connection and possibly release the connection.
+ */
+static void fcgi_detach(struct sedesc *sd)
+{
+ struct fcgi_strm *fstrm = sd->se;
+ struct fcgi_conn *fconn;
+ struct session *sess;
+
+ TRACE_ENTER(FCGI_EV_STRM_END, (fstrm ? fstrm->fconn->conn : NULL), fstrm);
+
+ if (!fstrm) {
+ TRACE_LEAVE(FCGI_EV_STRM_END);
+ return;
+ }
+
+ /* there's no txbuf so we're certain no to be able to send anything */
+ fstrm->flags &= ~FCGI_SF_NOTIFIED;
+
+ sess = fstrm->sess;
+ fconn = fstrm->fconn;
+ fconn->nb_sc--;
+
+ if (fstrm->proto_status == FCGI_PS_CANT_MPX_CONN) {
+ fconn->flags &= ~FCGI_CF_MPXS_CONNS;
+ fconn->streams_limit = 1;
+ }
+ else if (fstrm->proto_status == FCGI_PS_OVERLOADED ||
+ fstrm->proto_status == FCGI_PS_UNKNOWN_ROLE) {
+ fconn->flags &= ~FCGI_CF_KEEP_CONN;
+ fconn->state = FCGI_CS_CLOSED;
+ }
+
+ /* this stream may be blocked waiting for some data to leave, so orphan
+ * it in this case.
+ */
+ if (!(fconn->flags & (FCGI_CF_ERR_PENDING|FCGI_CF_ERROR)) && // FIXME: Be sure for ERR_PENDING
+ (fconn->state != FCGI_CS_CLOSED) &&
+ (fstrm->flags & (FCGI_SF_BLK_MBUSY|FCGI_SF_BLK_MROOM)) &&
+ (fstrm->subs || (fstrm->flags & (FCGI_SF_WANT_SHUTR|FCGI_SF_WANT_SHUTW)))) {
+ TRACE_DEVEL("leaving on stream blocked", FCGI_EV_STRM_END|FCGI_EV_FSTRM_BLK, fconn->conn, fstrm);
+ return;
+ }
+
+ if ((fconn->flags & FCGI_CF_DEM_BLOCK_ANY && fstrm->id == fconn->dsi)) {
+ /* unblock the connection if it was blocked on this stream. */
+ fconn->flags &= ~FCGI_CF_DEM_BLOCK_ANY;
+ fcgi_conn_restart_reading(fconn, 1);
+ }
+
+ fcgi_strm_destroy(fstrm);
+
+ if (!(fconn->flags & (FCGI_CF_EOS|FCGI_CF_ERR_PENDING|FCGI_CF_ERROR)) &&
+ (fconn->flags & FCGI_CF_KEEP_CONN)) {
+ if (fconn->conn->flags & CO_FL_PRIVATE) {
+ /* Add the connection in the session serverlist, if not already done */
+ if (!session_add_conn(sess, fconn->conn, fconn->conn->target)) {
+ fconn->conn->owner = NULL;
+ if (eb_is_empty(&fconn->streams_by_id)) {
+ /* let's kill the connection right away */
+ fconn->conn->mux->destroy(fconn);
+ TRACE_DEVEL("outgoing connection killed", FCGI_EV_STRM_END|FCGI_EV_FCONN_ERR);
+ return;
+ }
+ }
+ if (eb_is_empty(&fconn->streams_by_id)) {
+ if (session_check_idle_conn(fconn->conn->owner, fconn->conn) != 0) {
+ /* The connection is destroyed, let's leave */
+ TRACE_DEVEL("outgoing connection killed", FCGI_EV_STRM_END|FCGI_EV_FCONN_ERR);
+ return;
+ }
+ }
+ }
+ else {
+ if (eb_is_empty(&fconn->streams_by_id)) {
+ /* If the connection is owned by the session, first remove it
+ * from its list
+ */
+ if (fconn->conn->owner) {
+ session_unown_conn(fconn->conn->owner, fconn->conn);
+ fconn->conn->owner = NULL;
+ }
+
+ /* mark that the tasklet may lose its context to another thread and
+ * that the handler needs to check it under the idle conns lock.
+ */
+ HA_ATOMIC_OR(&fconn->wait_event.tasklet->state, TASK_F_USR1);
+ xprt_set_idle(fconn->conn, fconn->conn->xprt, fconn->conn->xprt_ctx);
+
+ if (!srv_add_to_idle_list(objt_server(fconn->conn->target), fconn->conn, 1)) {
+ /* The server doesn't want it, let's kill the connection right away */
+ fconn->conn->mux->destroy(fconn);
+ TRACE_DEVEL("outgoing connection killed", FCGI_EV_STRM_END|FCGI_EV_FCONN_ERR);
+ return;
+ }
+ /* At this point, the connection has been added to the
+ * server idle list, so another thread may already have
+ * hijacked it, so we can't do anything with it.
+ */
+ TRACE_DEVEL("reusable idle connection", FCGI_EV_STRM_END, fconn->conn);
+ return;
+ }
+ else if (!fconn->conn->hash_node->node.node.leaf_p &&
+ fcgi_avail_streams(fconn->conn) > 0 && objt_server(fconn->conn->target) &&
+ !LIST_INLIST(&fconn->conn->session_list)) {
+ srv_add_to_avail_list(__objt_server(fconn->conn->target), fconn->conn);
+ }
+ }
+ }
+
+ /* We don't want to close right now unless we're removing the last
+ * stream and the connection is in error.
+ */
+ if (fcgi_conn_is_dead(fconn)) {
+ /* no more stream will come, kill it now */
+ TRACE_DEVEL("leaving, killing dead connection", FCGI_EV_STRM_END, fconn->conn);
+ fcgi_release(fconn);
+ }
+ else if (fconn->task) {
+ fconn->task->expire = tick_add(now_ms, (fconn->state == FCGI_CS_CLOSED ? fconn->shut_timeout : fconn->timeout));
+ task_queue(fconn->task);
+ TRACE_DEVEL("leaving, refreshing connection's timeout", FCGI_EV_STRM_END, fconn->conn);
+ }
+ else
+ TRACE_DEVEL("leaving", FCGI_EV_STRM_END, fconn->conn);
+}
+
+
+/* Performs a synchronous or asynchronous shutr(). */
+static void fcgi_do_shutr(struct fcgi_strm *fstrm)
+{
+ struct fcgi_conn *fconn = fstrm->fconn;
+
+ TRACE_ENTER(FCGI_EV_STRM_SHUT, fconn->conn, fstrm);
+
+ if (fstrm->state == FCGI_SS_CLOSED)
+ goto done;
+
+ /* a connstream may require us to immediately kill the whole connection
+ * for example because of a "tcp-request content reject" rule that is
+ * normally used to limit abuse.
+ */
+ if (se_fl_test(fstrm->sd, SE_FL_KILL_CONN) &&
+ !(fconn->flags & (FCGI_CF_ABRTS_SENT|FCGI_CF_ABRTS_FAILED))) {
+ TRACE_STATE("stream wants to kill the connection", FCGI_EV_STRM_SHUT, fconn->conn, fstrm);
+ fconn->state = FCGI_CS_CLOSED;
+ }
+ else if (fstrm->flags & FCGI_SF_BEGIN_SENT) {
+ TRACE_STATE("no headers sent yet, trying a retryable abort", FCGI_EV_STRM_SHUT, fconn->conn, fstrm);
+ if (!(fstrm->flags & (FCGI_SF_ES_SENT|FCGI_SF_ABRT_SENT)) &&
+ !fcgi_strm_send_abort(fconn, fstrm))
+ goto add_to_list;
+ }
+
+ fcgi_strm_close(fstrm);
+
+ if (!(fconn->wait_event.events & SUB_RETRY_SEND))
+ tasklet_wakeup(fconn->wait_event.tasklet);
+ done:
+ fstrm->flags &= ~FCGI_SF_WANT_SHUTR;
+ TRACE_LEAVE(FCGI_EV_STRM_SHUT, fconn->conn, fstrm);
+ return;
+
+ add_to_list:
+ /* Let the handler know we want to shutr, and add ourselves to the
+ * send list if not yet done. fcgi_deferred_shut() will be
+ * automatically called via the shut_tl tasklet when there's room
+ * again.
+ */
+ if (!LIST_INLIST(&fstrm->send_list)) {
+ if (fstrm->flags & (FCGI_SF_BLK_MBUSY|FCGI_SF_BLK_MROOM)) {
+ LIST_APPEND(&fconn->send_list, &fstrm->send_list);
+ }
+ }
+ fstrm->flags |= FCGI_SF_WANT_SHUTR;
+ TRACE_LEAVE(FCGI_EV_STRM_SHUT, fconn->conn, fstrm);
+ return;
+}
+
+/* Performs a synchronous or asynchronous shutw(). */
+static void fcgi_do_shutw(struct fcgi_strm *fstrm)
+{
+ struct fcgi_conn *fconn = fstrm->fconn;
+
+ TRACE_ENTER(FCGI_EV_STRM_SHUT, fconn->conn, fstrm);
+
+ if (fstrm->state != FCGI_SS_HLOC || fstrm->state == FCGI_SS_CLOSED)
+ goto done;
+
+ if (fstrm->state != FCGI_SS_ERROR && (fstrm->flags & FCGI_SF_BEGIN_SENT)) {
+ if (!(fstrm->flags & (FCGI_SF_ES_SENT|FCGI_SF_ABRT_SENT)) &&
+ !fcgi_strm_send_abort(fconn, fstrm))
+ goto add_to_list;
+
+ if (fstrm->state == FCGI_SS_HREM)
+ fcgi_strm_close(fstrm);
+ else
+ fstrm->state = FCGI_SS_HLOC;
+ } else {
+ /* a connstream may require us to immediately kill the whole connection
+ * for example because of a "tcp-request content reject" rule that is
+ * normally used to limit abuse.
+ */
+ if (se_fl_test(fstrm->sd, SE_FL_KILL_CONN) &&
+ !(fconn->flags & (FCGI_CF_ABRTS_SENT|FCGI_CF_ABRTS_FAILED))) {
+ TRACE_STATE("stream wants to kill the connection", FCGI_EV_STRM_SHUT, fconn->conn, fstrm);
+ fconn->state = FCGI_CS_CLOSED;
+ }
+
+ fcgi_strm_close(fstrm);
+ }
+
+ if (!(fconn->wait_event.events & SUB_RETRY_SEND))
+ tasklet_wakeup(fconn->wait_event.tasklet);
+ done:
+ fstrm->flags &= ~FCGI_SF_WANT_SHUTW;
+ TRACE_LEAVE(FCGI_EV_STRM_SHUT, fconn->conn, fstrm);
+ return;
+
+ add_to_list:
+ /* Let the handler know we want to shutr, and add ourselves to the
+ * send list if not yet done. fcgi_deferred_shut() will be
+ * automatically called via the shut_tl tasklet when there's room
+ * again.
+ */
+ if (!LIST_INLIST(&fstrm->send_list)) {
+ if (fstrm->flags & (FCGI_SF_BLK_MBUSY|FCGI_SF_BLK_MROOM)) {
+ LIST_APPEND(&fconn->send_list, &fstrm->send_list);
+ }
+ }
+ fstrm->flags |= FCGI_SF_WANT_SHUTW;
+ TRACE_LEAVE(FCGI_EV_STRM_SHUT, fconn->conn, fstrm);
+ return;
+}
+
+/* This is the tasklet referenced in fstrm->shut_tl, it is used for
+ * deferred shutdowns when the fcgi_detach() was done but the mux buffer was full
+ * and prevented the last record from being emitted.
+ */
+struct task *fcgi_deferred_shut(struct task *t, void *ctx, unsigned int state)
+{
+ struct fcgi_strm *fstrm = ctx;
+ struct fcgi_conn *fconn = fstrm->fconn;
+
+ TRACE_ENTER(FCGI_EV_STRM_SHUT, fconn->conn, fstrm);
+
+ if (fstrm->flags & FCGI_SF_NOTIFIED) {
+ /* some data processing remains to be done first */
+ goto end;
+ }
+
+ if (fstrm->flags & FCGI_SF_WANT_SHUTW)
+ fcgi_do_shutw(fstrm);
+
+ if (fstrm->flags & FCGI_SF_WANT_SHUTR)
+ fcgi_do_shutr(fstrm);
+
+ if (!(fstrm->flags & (FCGI_SF_WANT_SHUTR|FCGI_SF_WANT_SHUTW))) {
+ /* We're done trying to send, remove ourself from the send_list */
+ LIST_DEL_INIT(&fstrm->send_list);
+
+ if (!fcgi_strm_sc(fstrm)) {
+ fcgi_strm_destroy(fstrm);
+ if (fcgi_conn_is_dead(fconn))
+ fcgi_release(fconn);
+ }
+ }
+ end:
+ TRACE_LEAVE(FCGI_EV_STRM_SHUT);
+ return NULL;
+}
+
+/* shutr() called by the stream connector (mux_ops.shutr) */
+static void fcgi_shutr(struct stconn *sc, enum co_shr_mode mode)
+{
+ struct fcgi_strm *fstrm = __sc_mux_strm(sc);
+
+ TRACE_POINT(FCGI_EV_STRM_SHUT, fstrm->fconn->conn, fstrm);
+ if (!mode)
+ return;
+ fcgi_do_shutr(fstrm);
+}
+
+/* shutw() called by the stream connector (mux_ops.shutw) */
+static void fcgi_shutw(struct stconn *sc, enum co_shw_mode mode)
+{
+ struct fcgi_strm *fstrm = __sc_mux_strm(sc);
+
+ TRACE_POINT(FCGI_EV_STRM_SHUT, fstrm->fconn->conn, fstrm);
+ fcgi_do_shutw(fstrm);
+}
+
+/* Called from the upper layer, to subscribe <es> to events <event_type>. The
+ * event subscriber <es> is not allowed to change from a previous call as long
+ * as at least one event is still subscribed. The <event_type> must only be a
+ * combination of SUB_RETRY_RECV and SUB_RETRY_SEND. It always returns 0.
+ */
+static int fcgi_subscribe(struct stconn *sc, int event_type, struct wait_event *es)
+{
+ struct fcgi_strm *fstrm = __sc_mux_strm(sc);
+ struct fcgi_conn *fconn = fstrm->fconn;
+
+ BUG_ON(event_type & ~(SUB_RETRY_SEND|SUB_RETRY_RECV));
+ BUG_ON(fstrm->subs && fstrm->subs != es);
+
+ es->events |= event_type;
+ fstrm->subs = es;
+
+ if (event_type & SUB_RETRY_RECV)
+ TRACE_DEVEL("unsubscribe(recv)", FCGI_EV_STRM_RECV, fconn->conn, fstrm);
+
+ if (event_type & SUB_RETRY_SEND) {
+ TRACE_DEVEL("unsubscribe(send)", FCGI_EV_STRM_SEND, fconn->conn, fstrm);
+ if (!LIST_INLIST(&fstrm->send_list))
+ LIST_APPEND(&fconn->send_list, &fstrm->send_list);
+ }
+ return 0;
+}
+
+/* Called from the upper layer, to unsubscribe <es> from events <event_type>
+ * (undo fcgi_subscribe). The <es> pointer is not allowed to differ from the one
+ * passed to the subscribe() call. It always returns zero.
+ */
+static int fcgi_unsubscribe(struct stconn *sc, int event_type, struct wait_event *es)
+{
+ struct fcgi_strm *fstrm = __sc_mux_strm(sc);
+ struct fcgi_conn *fconn = fstrm->fconn;
+
+ BUG_ON(event_type & ~(SUB_RETRY_SEND|SUB_RETRY_RECV));
+ BUG_ON(fstrm->subs && fstrm->subs != es);
+
+ es->events &= ~event_type;
+ if (!es->events)
+ fstrm->subs = NULL;
+
+ if (event_type & SUB_RETRY_RECV)
+ TRACE_DEVEL("subscribe(recv)", FCGI_EV_STRM_RECV, fconn->conn, fstrm);
+
+ if (event_type & SUB_RETRY_SEND) {
+ TRACE_DEVEL("subscribe(send)", FCGI_EV_STRM_SEND, fconn->conn, fstrm);
+ fstrm->flags &= ~FCGI_SF_NOTIFIED;
+ if (!(fstrm->flags & (FCGI_SF_WANT_SHUTR|FCGI_SF_WANT_SHUTW)))
+ LIST_DEL_INIT(&fstrm->send_list);
+ }
+ return 0;
+}
+
+/* Called from the upper layer, to receive data
+ *
+ * The caller is responsible for defragmenting <buf> if necessary. But <flags>
+ * must be tested to know the calling context. If CO_RFL_BUF_FLUSH is set, it
+ * means the caller wants to flush input data (from the mux buffer and the
+ * channel buffer) to be able to use kernel splicing or any kind of mux-to-mux
+ * xfer. If CO_RFL_KEEP_RECV is set, the mux must always subscribe for read
+ * events before giving back. CO_RFL_BUF_WET is set if <buf> is congested with
+ * data scheduled for leaving soon. CO_RFL_BUF_NOT_STUCK is set to instruct the
+ * mux it may optimize the data copy to <buf> if necessary. Otherwise, it should
+ * copy as much data as possible.
+ */
+static size_t fcgi_rcv_buf(struct stconn *sc, struct buffer *buf, size_t count, int flags)
+{
+ struct fcgi_strm *fstrm = __sc_mux_strm(sc);
+ struct fcgi_conn *fconn = fstrm->fconn;
+ size_t ret = 0;
+
+ TRACE_ENTER(FCGI_EV_STRM_RECV, fconn->conn, fstrm);
+
+ if (!(fconn->flags & FCGI_CF_DEM_SALLOC))
+ ret = fcgi_strm_parse_response(fstrm, buf, count);
+ else
+ TRACE_STATE("fstrm rxbuf not allocated", FCGI_EV_STRM_RECV|FCGI_EV_FSTRM_BLK, fconn->conn, fstrm);
+
+ if (b_data(&fstrm->rxbuf)) {
+ /* If the channel buffer is not empty, consider the mux is
+ * blocked because it needs more room. But if the channel buffer
+ * is empty, it means partial data were received and the mux
+ * needs to receive more data to be able to parse it.
+ */
+ if (b_data(buf))
+ se_fl_set(fstrm->sd, SE_FL_RCV_MORE | SE_FL_WANT_ROOM);
+ }
+ else {
+ se_fl_clr(fstrm->sd, SE_FL_RCV_MORE | SE_FL_WANT_ROOM);
+ if (fstrm->state == FCGI_SS_ERROR || (fstrm->h1m.state == H1_MSG_DONE)) {
+ se_fl_set(fstrm->sd, SE_FL_EOI);
+ if (!(fstrm->h1m.flags & (H1_MF_VER_11|H1_MF_XFER_LEN)))
+ se_fl_set(fstrm->sd, SE_FL_EOS);
+ }
+ if (fcgi_conn_read0_pending(fconn)) {
+ se_fl_set(fstrm->sd, SE_FL_EOS);
+ if (!se_fl_test(fstrm->sd, SE_FL_EOI))
+ se_fl_set(fstrm->sd, SE_FL_ERROR);
+ }
+ if (se_fl_test(fstrm->sd, SE_FL_ERR_PENDING))
+ se_fl_set(fstrm->sd, SE_FL_ERROR);
+ fcgi_release_buf(fconn, &fstrm->rxbuf);
+ }
+
+ if (ret && fconn->dsi == fstrm->id) {
+ /* demux is blocking on this stream's buffer */
+ fconn->flags &= ~FCGI_CF_DEM_SFULL;
+ fcgi_conn_restart_reading(fconn, 1);
+ }
+
+ TRACE_LEAVE(FCGI_EV_STRM_RECV, fconn->conn, fstrm);
+ return ret;
+}
+
+
+/* Called from the upper layer, to send data from buffer <buf> for no more than
+ * <count> bytes. Returns the number of bytes effectively sent. Some status
+ * flags may be updated on the stream connector.
+ */
+static size_t fcgi_snd_buf(struct stconn *sc, struct buffer *buf, size_t count, int flags)
+{
+ struct fcgi_strm *fstrm = __sc_mux_strm(sc);
+ struct fcgi_conn *fconn = fstrm->fconn;
+ size_t total = 0;
+ size_t ret;
+ struct htx *htx = NULL;
+ struct htx_sl *sl;
+ struct htx_blk *blk;
+ uint32_t bsize;
+
+ TRACE_ENTER(FCGI_EV_STRM_SEND, fconn->conn, fstrm, 0, (size_t[]){count});
+
+ /* If we were not just woken because we wanted to send but couldn't,
+ * and there's somebody else that is waiting to send, do nothing,
+ * we will subscribe later and be put at the end of the list
+ */
+ if (!(fstrm->flags & FCGI_SF_NOTIFIED) && !LIST_ISEMPTY(&fconn->send_list)) {
+ TRACE_STATE("other streams already waiting, going to the queue and leaving", FCGI_EV_STRM_SEND|FCGI_EV_FSTRM_BLK, fconn->conn, fstrm);
+ return 0;
+ }
+ fstrm->flags &= ~FCGI_SF_NOTIFIED;
+
+ if (fconn->state < FCGI_CS_RECORD_H) {
+ TRACE_STATE("connection not ready, leaving", FCGI_EV_STRM_SEND|FCGI_EV_FSTRM_BLK, fconn->conn, fstrm);
+ return 0;
+ }
+
+ htx = htxbuf(buf);
+ if (fstrm->id == 0) {
+ int32_t id = fcgi_conn_get_next_sid(fconn);
+
+ if (id < 0) {
+ fcgi_strm_close(fstrm);
+ se_fl_set(fstrm->sd, SE_FL_ERROR);
+ TRACE_DEVEL("couldn't get a stream ID, leaving in error", FCGI_EV_STRM_SEND|FCGI_EV_FSTRM_ERR|FCGI_EV_STRM_ERR, fconn->conn, fstrm);
+ return 0;
+ }
+
+ eb32_delete(&fstrm->by_id);
+ fstrm->by_id.key = fstrm->id = id;
+ fconn->max_id = id;
+ fconn->nb_reserved--;
+ eb32_insert(&fconn->streams_by_id, &fstrm->by_id);
+
+
+ /* Check if length of the body is known or if the message is
+ * full. Otherwise, the request is invalid.
+ */
+ sl = http_get_stline(htx);
+ if (!sl || (!(sl->flags & HTX_SL_F_CLEN) && !(htx->flags & HTX_FL_EOM))) {
+ htx->flags |= HTX_FL_PARSING_ERROR;
+ fcgi_strm_error(fstrm);
+ goto done;
+ }
+ }
+
+ if (!(fstrm->flags & FCGI_SF_BEGIN_SENT)) {
+ TRACE_PROTO("sending FCGI BEGIN_REQUEST record", FCGI_EV_TX_RECORD|FCGI_EV_TX_BEGREQ, fconn->conn, fstrm);
+ if (!fcgi_strm_send_begin_request(fconn, fstrm))
+ goto done;
+ }
+
+ if (!(fstrm->flags & FCGI_SF_OUTGOING_DATA) && count)
+ fstrm->flags |= FCGI_SF_OUTGOING_DATA;
+
+ while (fstrm->state < FCGI_SS_HLOC && !(fstrm->flags & FCGI_SF_BLK_ANY) &&
+ count && !htx_is_empty(htx)) {
+ blk = htx_get_head_blk(htx);
+ ALREADY_CHECKED(blk);
+ bsize = htx_get_blksz(blk);
+
+ switch (htx_get_blk_type(blk)) {
+ case HTX_BLK_REQ_SL:
+ case HTX_BLK_HDR:
+ TRACE_USER("sending FCGI PARAMS record", FCGI_EV_TX_RECORD|FCGI_EV_TX_PARAMS, fconn->conn, fstrm, htx);
+ ret = fcgi_strm_send_params(fconn, fstrm, htx);
+ if (!ret) {
+ goto done;
+ }
+ total += ret;
+ count -= ret;
+ break;
+
+ case HTX_BLK_EOH:
+ if (!(fstrm->flags & FCGI_SF_EP_SENT)) {
+ TRACE_PROTO("sending FCGI PARAMS record", FCGI_EV_TX_RECORD|FCGI_EV_TX_PARAMS, fconn->conn, fstrm, htx);
+ ret = fcgi_strm_send_empty_params(fconn, fstrm);
+ if (!ret)
+ goto done;
+ }
+ if (htx_is_unique_blk(htx, blk) && (htx->flags & HTX_FL_EOM)) {
+ TRACE_PROTO("sending FCGI STDIN record", FCGI_EV_TX_RECORD|FCGI_EV_TX_STDIN, fconn->conn, fstrm, htx);
+ ret = fcgi_strm_send_empty_stdin(fconn, fstrm);
+ if (!ret)
+ goto done;
+ }
+ goto remove_blk;
+
+ case HTX_BLK_DATA:
+ TRACE_PROTO("sending FCGI STDIN record", FCGI_EV_TX_RECORD|FCGI_EV_TX_STDIN, fconn->conn, fstrm, htx);
+ ret = fcgi_strm_send_stdin(fconn, fstrm, htx, count, buf);
+ if (ret > 0) {
+ htx = htx_from_buf(buf);
+ total += ret;
+ count -= ret;
+ if (ret < bsize)
+ goto done;
+ }
+ break;
+
+ default:
+ remove_blk:
+ htx_remove_blk(htx, blk);
+ total += bsize;
+ count -= bsize;
+ break;
+ }
+ }
+
+ done:
+ if (fstrm->state >= FCGI_SS_HLOC) {
+ /* trim any possibly pending data after we close (extra CR-LF,
+ * unprocessed trailers, abnormal extra data, ...)
+ */
+ total += count;
+ count = 0;
+ }
+
+ if (fstrm->state == FCGI_SS_ERROR) {
+ TRACE_DEVEL("reporting error to the app-layer stream", FCGI_EV_STRM_SEND|FCGI_EV_FSTRM_ERR|FCGI_EV_STRM_ERR, fconn->conn, fstrm);
+ se_fl_set_error(fstrm->sd);
+ if (!(fstrm->flags & FCGI_SF_BEGIN_SENT) || fcgi_strm_send_abort(fconn, fstrm))
+ fcgi_strm_close(fstrm);
+ }
+
+ if (htx)
+ htx_to_buf(htx, buf);
+
+ if (total > 0) {
+ if (!(fconn->wait_event.events & SUB_RETRY_SEND)) {
+ TRACE_DEVEL("data queued, waking up fconn sender", FCGI_EV_STRM_SEND|FCGI_EV_FCONN_SEND|FCGI_EV_FCONN_WAKE, fconn->conn, fstrm);
+ tasklet_wakeup(fconn->wait_event.tasklet);
+ }
+
+ /* Ok we managed to send something, leave the send_list */
+ if (!(fstrm->flags & (FCGI_SF_WANT_SHUTR|FCGI_SF_WANT_SHUTW)))
+ LIST_DEL_INIT(&fstrm->send_list);
+ }
+
+ TRACE_LEAVE(FCGI_EV_STRM_SEND, fconn->conn, fstrm, htx, (size_t[]){total});
+ return total;
+}
+
+/* for debugging with CLI's "show fd" command */
+static int fcgi_show_fd(struct buffer *msg, struct connection *conn)
+{
+ struct fcgi_conn *fconn = conn->ctx;
+ struct fcgi_strm *fstrm = NULL;
+ struct eb32_node *node;
+ int send_cnt = 0;
+ int tree_cnt = 0;
+ int orph_cnt = 0;
+ struct buffer *hmbuf, *tmbuf;
+
+ if (!fconn)
+ return 0;
+
+ list_for_each_entry(fstrm, &fconn->send_list, send_list)
+ send_cnt++;
+
+ fstrm = NULL;
+ node = eb32_first(&fconn->streams_by_id);
+ while (node) {
+ fstrm = container_of(node, struct fcgi_strm, by_id);
+ tree_cnt++;
+ if (!fcgi_strm_sc(fstrm))
+ orph_cnt++;
+ node = eb32_next(node);
+ }
+
+ hmbuf = br_head(fconn->mbuf);
+ tmbuf = br_tail(fconn->mbuf);
+ chunk_appendf(msg, " fconn.st0=%d .maxid=%d .flg=0x%04x .nbst=%u"
+ " .nbcs=%u .send_cnt=%d .tree_cnt=%d .orph_cnt=%d .sub=%d "
+ ".dsi=%d .dbuf=%u@%p+%u/%u .mbuf=[%u..%u|%u],h=[%u@%p+%u/%u],t=[%u@%p+%u/%u]",
+ fconn->state, fconn->max_id, fconn->flags,
+ fconn->nb_streams, fconn->nb_sc, send_cnt, tree_cnt, orph_cnt,
+ fconn->wait_event.events, fconn->dsi,
+ (unsigned int)b_data(&fconn->dbuf), b_orig(&fconn->dbuf),
+ (unsigned int)b_head_ofs(&fconn->dbuf), (unsigned int)b_size(&fconn->dbuf),
+ br_head_idx(fconn->mbuf), br_tail_idx(fconn->mbuf), br_size(fconn->mbuf),
+ (unsigned int)b_data(hmbuf), b_orig(hmbuf),
+ (unsigned int)b_head_ofs(hmbuf), (unsigned int)b_size(hmbuf),
+ (unsigned int)b_data(tmbuf), b_orig(tmbuf),
+ (unsigned int)b_head_ofs(tmbuf), (unsigned int)b_size(tmbuf));
+
+ if (fstrm) {
+ chunk_appendf(msg, " last_fstrm=%p .id=%d .flg=0x%04x .rxbuf=%u@%p+%u/%u .sc=%p",
+ fstrm, fstrm->id, fstrm->flags,
+ (unsigned int)b_data(&fstrm->rxbuf), b_orig(&fstrm->rxbuf),
+ (unsigned int)b_head_ofs(&fstrm->rxbuf), (unsigned int)b_size(&fstrm->rxbuf),
+ fcgi_strm_sc(fstrm));
+
+ chunk_appendf(msg, " .sd.flg=0x%08x", se_fl_get(fstrm->sd));
+ if (!se_fl_test(fstrm->sd, SE_FL_ORPHAN))
+ chunk_appendf(msg, " .sc.flg=0x%08x .sc.app=%p",
+ fcgi_strm_sc(fstrm)->flags, fcgi_strm_sc(fstrm)->app);
+
+ chunk_appendf(msg, " .subs=%p", fstrm->subs);
+ if (fstrm->subs) {
+ chunk_appendf(msg, "(ev=%d tl=%p", fstrm->subs->events, fstrm->subs->tasklet);
+ chunk_appendf(msg, " tl.calls=%d tl.ctx=%p tl.fct=",
+ fstrm->subs->tasklet->calls,
+ fstrm->subs->tasklet->context);
+ resolve_sym_name(msg, NULL, fstrm->subs->tasklet->process);
+ chunk_appendf(msg, ")");
+ }
+ }
+ return 0;
+}
+
+/* Migrate the the connection to the current thread.
+ * Return 0 if successful, non-zero otherwise.
+ * Expected to be called with the old thread lock held.
+ */
+static int fcgi_takeover(struct connection *conn, int orig_tid)
+{
+ struct fcgi_conn *fcgi = conn->ctx;
+ struct task *task;
+ struct task *new_task;
+ struct tasklet *new_tasklet;
+
+ /* Pre-allocate tasks so that we don't have to roll back after the xprt
+ * has been migrated.
+ */
+ new_task = task_new_here();
+ new_tasklet = tasklet_new();
+ if (!new_task || !new_tasklet)
+ goto fail;
+
+ if (fd_takeover(conn->handle.fd, conn) != 0)
+ goto fail;
+
+ if (conn->xprt->takeover && conn->xprt->takeover(conn, conn->xprt_ctx, orig_tid) != 0) {
+ /* We failed to takeover the xprt, even if the connection may
+ * still be valid, flag it as error'd, as we have already
+ * taken over the fd, and wake the tasklet, so that it will
+ * destroy it.
+ */
+ conn->flags |= CO_FL_ERROR;
+ tasklet_wakeup_on(fcgi->wait_event.tasklet, orig_tid);
+ goto fail;
+ }
+
+ if (fcgi->wait_event.events)
+ fcgi->conn->xprt->unsubscribe(fcgi->conn, fcgi->conn->xprt_ctx,
+ fcgi->wait_event.events, &fcgi->wait_event);
+
+ task = fcgi->task;
+ if (task) {
+ /* only assign a task if there was already one, otherwise
+ * the preallocated new task will be released.
+ */
+ task->context = NULL;
+ fcgi->task = NULL;
+ __ha_barrier_store();
+ task_kill(task);
+
+ fcgi->task = new_task;
+ new_task = NULL;
+ fcgi->task->process = fcgi_timeout_task;
+ fcgi->task->context = fcgi;
+ }
+
+ /* To let the tasklet know it should free itself, and do nothing else,
+ * set its context to NULL;
+ */
+ fcgi->wait_event.tasklet->context = NULL;
+ tasklet_wakeup_on(fcgi->wait_event.tasklet, orig_tid);
+
+ fcgi->wait_event.tasklet = new_tasklet;
+ fcgi->wait_event.tasklet->process = fcgi_io_cb;
+ fcgi->wait_event.tasklet->context = fcgi;
+ fcgi->conn->xprt->subscribe(fcgi->conn, fcgi->conn->xprt_ctx,
+ SUB_RETRY_RECV, &fcgi->wait_event);
+
+ if (new_task)
+ __task_free(new_task);
+ return 0;
+ fail:
+ if (new_task)
+ __task_free(new_task);
+ tasklet_free(new_tasklet);
+ return -1;
+}
+
+/****************************************/
+/* MUX initialization and instantiation */
+/****************************************/
+
+/* The mux operations */
+static const struct mux_ops mux_fcgi_ops = {
+ .init = fcgi_init,
+ .wake = fcgi_wake,
+ .attach = fcgi_attach,
+ .get_first_sc = fcgi_get_first_sc,
+ .detach = fcgi_detach,
+ .destroy = fcgi_destroy,
+ .avail_streams = fcgi_avail_streams,
+ .used_streams = fcgi_used_streams,
+ .rcv_buf = fcgi_rcv_buf,
+ .snd_buf = fcgi_snd_buf,
+ .subscribe = fcgi_subscribe,
+ .unsubscribe = fcgi_unsubscribe,
+ .shutr = fcgi_shutr,
+ .shutw = fcgi_shutw,
+ .ctl = fcgi_ctl,
+ .sctl = fcgi_sctl,
+ .show_fd = fcgi_show_fd,
+ .takeover = fcgi_takeover,
+ .flags = MX_FL_HTX|MX_FL_HOL_RISK|MX_FL_NO_UPG,
+ .name = "FCGI",
+};
+
+
+/* this mux registers FCGI proto */
+static struct mux_proto_list mux_proto_fcgi =
+{ .token = IST("fcgi"), .mode = PROTO_MODE_HTTP, .side = PROTO_SIDE_BE, .mux = &mux_fcgi_ops };
+
+INITCALL1(STG_REGISTER, register_mux_proto, &mux_proto_fcgi);
+
+/*
+ * Local variables:
+ * c-indent-level: 8
+ * c-basic-offset: 8
+ * End:
+ */