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-rw-r--r--src/iperf_tcp.c583
1 files changed, 583 insertions, 0 deletions
diff --git a/src/iperf_tcp.c b/src/iperf_tcp.c
new file mode 100644
index 0000000..ce6a522
--- /dev/null
+++ b/src/iperf_tcp.c
@@ -0,0 +1,583 @@
+/*
+ * iperf, Copyright (c) 2014-2022, The Regents of the University of
+ * California, through Lawrence Berkeley National Laboratory (subject
+ * to receipt of any required approvals from the U.S. Dept. of
+ * Energy). All rights reserved.
+ *
+ * If you have questions about your rights to use or distribute this
+ * software, please contact Berkeley Lab's Technology Transfer
+ * Department at TTD@lbl.gov.
+ *
+ * NOTICE. This software is owned by the U.S. Department of Energy.
+ * As such, the U.S. Government has been granted for itself and others
+ * acting on its behalf a paid-up, nonexclusive, irrevocable,
+ * worldwide license in the Software to reproduce, prepare derivative
+ * works, and perform publicly and display publicly. Beginning five
+ * (5) years after the date permission to assert copyright is obtained
+ * from the U.S. Department of Energy, and subject to any subsequent
+ * five (5) year renewals, the U.S. Government is granted for itself
+ * and others acting on its behalf a paid-up, nonexclusive,
+ * irrevocable, worldwide license in the Software to reproduce,
+ * prepare derivative works, distribute copies to the public, perform
+ * publicly and display publicly, and to permit others to do so.
+ *
+ * This code is distributed under a BSD style license, see the LICENSE
+ * file for complete information.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <arpa/inet.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <sys/time.h>
+#include <sys/select.h>
+#include <limits.h>
+
+#include "iperf.h"
+#include "iperf_api.h"
+#include "iperf_tcp.h"
+#include "net.h"
+#include "cjson.h"
+
+#if defined(HAVE_FLOWLABEL)
+#include "flowlabel.h"
+#endif /* HAVE_FLOWLABEL */
+
+/* iperf_tcp_recv
+ *
+ * receives the data for TCP
+ */
+int
+iperf_tcp_recv(struct iperf_stream *sp)
+{
+ int r;
+
+ r = Nread(sp->socket, sp->buffer, sp->settings->blksize, Ptcp);
+
+ if (r < 0)
+ return r;
+
+ /* Only count bytes received while we're in the correct state. */
+ if (sp->test->state == TEST_RUNNING) {
+ sp->result->bytes_received += r;
+ sp->result->bytes_received_this_interval += r;
+ }
+ else {
+ if (sp->test->debug)
+ printf("Late receive, state = %d\n", sp->test->state);
+ }
+
+ return r;
+}
+
+
+/* iperf_tcp_send
+ *
+ * sends the data for TCP
+ */
+int
+iperf_tcp_send(struct iperf_stream *sp)
+{
+ int r;
+
+ if (!sp->pending_size)
+ sp->pending_size = sp->settings->blksize;
+
+ if (sp->test->zerocopy)
+ r = Nsendfile(sp->buffer_fd, sp->socket, sp->buffer, sp->pending_size);
+ else
+ r = Nwrite(sp->socket, sp->buffer, sp->pending_size, Ptcp);
+
+ if (r < 0)
+ return r;
+
+ sp->pending_size -= r;
+ sp->result->bytes_sent += r;
+ sp->result->bytes_sent_this_interval += r;
+
+ if (sp->test->debug_level >= DEBUG_LEVEL_DEBUG)
+ printf("sent %d bytes of %d, pending %d, total %" PRIu64 "\n",
+ r, sp->settings->blksize, sp->pending_size, sp->result->bytes_sent);
+
+ return r;
+}
+
+
+/* iperf_tcp_accept
+ *
+ * accept a new TCP stream connection
+ */
+int
+iperf_tcp_accept(struct iperf_test * test)
+{
+ int s;
+ signed char rbuf = ACCESS_DENIED;
+ char cookie[COOKIE_SIZE];
+ socklen_t len;
+ struct sockaddr_storage addr;
+
+ len = sizeof(addr);
+ if ((s = accept(test->listener, (struct sockaddr *) &addr, &len)) < 0) {
+ i_errno = IESTREAMCONNECT;
+ return -1;
+ }
+
+ if (Nread(s, cookie, COOKIE_SIZE, Ptcp) < 0) {
+ i_errno = IERECVCOOKIE;
+ return -1;
+ }
+
+ if (strcmp(test->cookie, cookie) != 0) {
+ if (Nwrite(s, (char*) &rbuf, sizeof(rbuf), Ptcp) < 0) {
+ iperf_err(test, "failed to send access denied from busy server to new connecting client, errno = %d\n", errno);
+ }
+ close(s);
+ }
+
+ return s;
+}
+
+
+/* iperf_tcp_listen
+ *
+ * start up a listener for TCP stream connections
+ */
+int
+iperf_tcp_listen(struct iperf_test *test)
+{
+ int s, opt;
+ socklen_t optlen;
+ int saved_errno;
+ int rcvbuf_actual, sndbuf_actual;
+
+ s = test->listener;
+
+ /*
+ * If certain parameters are specified (such as socket buffer
+ * size), then throw away the listening socket (the one for which
+ * we just accepted the control connection) and recreate it with
+ * those parameters. That way, when new data connections are
+ * set, they'll have all the correct parameters in place.
+ *
+ * It's not clear whether this is a requirement or a convenience.
+ */
+ if (test->no_delay || test->settings->mss || test->settings->socket_bufsize) {
+ struct addrinfo hints, *res;
+ char portstr[6];
+
+ FD_CLR(s, &test->read_set);
+ close(s);
+
+ snprintf(portstr, 6, "%d", test->server_port);
+ memset(&hints, 0, sizeof(hints));
+
+ /*
+ * If binding to the wildcard address with no explicit address
+ * family specified, then force us to get an AF_INET6 socket.
+ * More details in the comments in netanounce().
+ */
+ if (test->settings->domain == AF_UNSPEC && !test->bind_address) {
+ hints.ai_family = AF_INET6;
+ }
+ else {
+ hints.ai_family = test->settings->domain;
+ }
+ hints.ai_socktype = SOCK_STREAM;
+ hints.ai_flags = AI_PASSIVE;
+ if ((gerror = getaddrinfo(test->bind_address, portstr, &hints, &res)) != 0) {
+ i_errno = IESTREAMLISTEN;
+ return -1;
+ }
+
+ if ((s = socket(res->ai_family, SOCK_STREAM, 0)) < 0) {
+ freeaddrinfo(res);
+ i_errno = IESTREAMLISTEN;
+ return -1;
+ }
+
+ if (test->no_delay) {
+ opt = 1;
+ if (setsockopt(s, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof(opt)) < 0) {
+ saved_errno = errno;
+ close(s);
+ freeaddrinfo(res);
+ errno = saved_errno;
+ i_errno = IESETNODELAY;
+ return -1;
+ }
+ }
+ // XXX: Setting MSS is very buggy!
+ if ((opt = test->settings->mss)) {
+ if (setsockopt(s, IPPROTO_TCP, TCP_MAXSEG, &opt, sizeof(opt)) < 0) {
+ saved_errno = errno;
+ close(s);
+ freeaddrinfo(res);
+ errno = saved_errno;
+ i_errno = IESETMSS;
+ return -1;
+ }
+ }
+ if ((opt = test->settings->socket_bufsize)) {
+ if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &opt, sizeof(opt)) < 0) {
+ saved_errno = errno;
+ close(s);
+ freeaddrinfo(res);
+ errno = saved_errno;
+ i_errno = IESETBUF;
+ return -1;
+ }
+ if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &opt, sizeof(opt)) < 0) {
+ saved_errno = errno;
+ close(s);
+ freeaddrinfo(res);
+ errno = saved_errno;
+ i_errno = IESETBUF;
+ return -1;
+ }
+ }
+#if defined(HAVE_SO_MAX_PACING_RATE)
+ /* If fq socket pacing is specified, enable it. */
+ if (test->settings->fqrate) {
+ /* Convert bits per second to bytes per second */
+ unsigned int fqrate = test->settings->fqrate / 8;
+ if (fqrate > 0) {
+ if (test->debug) {
+ printf("Setting fair-queue socket pacing to %u\n", fqrate);
+ }
+ if (setsockopt(s, SOL_SOCKET, SO_MAX_PACING_RATE, &fqrate, sizeof(fqrate)) < 0) {
+ warning("Unable to set socket pacing");
+ }
+ }
+ }
+#endif /* HAVE_SO_MAX_PACING_RATE */
+ {
+ unsigned int rate = test->settings->rate / 8;
+ if (rate > 0) {
+ if (test->debug) {
+ printf("Setting application pacing to %u\n", rate);
+ }
+ }
+ }
+ opt = 1;
+ if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0) {
+ saved_errno = errno;
+ close(s);
+ freeaddrinfo(res);
+ errno = saved_errno;
+ i_errno = IEREUSEADDR;
+ return -1;
+ }
+
+ /*
+ * If we got an IPv6 socket, figure out if it should accept IPv4
+ * connections as well. See documentation in netannounce() for
+ * more details.
+ */
+#if defined(IPV6_V6ONLY) && !defined(__OpenBSD__)
+ if (res->ai_family == AF_INET6 && (test->settings->domain == AF_UNSPEC || test->settings->domain == AF_INET)) {
+ if (test->settings->domain == AF_UNSPEC)
+ opt = 0;
+ else
+ opt = 1;
+ if (setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY,
+ (char *) &opt, sizeof(opt)) < 0) {
+ saved_errno = errno;
+ close(s);
+ freeaddrinfo(res);
+ errno = saved_errno;
+ i_errno = IEV6ONLY;
+ return -1;
+ }
+ }
+#endif /* IPV6_V6ONLY */
+
+ if (bind(s, (struct sockaddr *) res->ai_addr, res->ai_addrlen) < 0) {
+ saved_errno = errno;
+ close(s);
+ freeaddrinfo(res);
+ errno = saved_errno;
+ i_errno = IESTREAMLISTEN;
+ return -1;
+ }
+
+ freeaddrinfo(res);
+
+ if (listen(s, INT_MAX) < 0) {
+ i_errno = IESTREAMLISTEN;
+ return -1;
+ }
+
+ test->listener = s;
+ }
+
+ /* Read back and verify the sender socket buffer size */
+ optlen = sizeof(sndbuf_actual);
+ if (getsockopt(s, SOL_SOCKET, SO_SNDBUF, &sndbuf_actual, &optlen) < 0) {
+ saved_errno = errno;
+ close(s);
+ errno = saved_errno;
+ i_errno = IESETBUF;
+ return -1;
+ }
+ if (test->debug) {
+ printf("SNDBUF is %u, expecting %u\n", sndbuf_actual, test->settings->socket_bufsize);
+ }
+ if (test->settings->socket_bufsize && test->settings->socket_bufsize > sndbuf_actual) {
+ i_errno = IESETBUF2;
+ return -1;
+ }
+
+ /* Read back and verify the receiver socket buffer size */
+ optlen = sizeof(rcvbuf_actual);
+ if (getsockopt(s, SOL_SOCKET, SO_RCVBUF, &rcvbuf_actual, &optlen) < 0) {
+ saved_errno = errno;
+ close(s);
+ errno = saved_errno;
+ i_errno = IESETBUF;
+ return -1;
+ }
+ if (test->debug) {
+ printf("RCVBUF is %u, expecting %u\n", rcvbuf_actual, test->settings->socket_bufsize);
+ }
+ if (test->settings->socket_bufsize && test->settings->socket_bufsize > rcvbuf_actual) {
+ i_errno = IESETBUF2;
+ return -1;
+ }
+
+ if (test->json_output) {
+ cJSON_AddNumberToObject(test->json_start, "sock_bufsize", test->settings->socket_bufsize);
+ cJSON_AddNumberToObject(test->json_start, "sndbuf_actual", sndbuf_actual);
+ cJSON_AddNumberToObject(test->json_start, "rcvbuf_actual", rcvbuf_actual);
+ }
+
+ return s;
+}
+
+
+/* iperf_tcp_connect
+ *
+ * connect to a TCP stream listener
+ * This function is roughly similar to netdial(), and may indeed have
+ * been derived from it at some point, but it sets many TCP-specific
+ * options between socket creation and connection.
+ */
+int
+iperf_tcp_connect(struct iperf_test *test)
+{
+ struct addrinfo *server_res;
+ int s, opt;
+ socklen_t optlen;
+ int saved_errno;
+ int rcvbuf_actual, sndbuf_actual;
+
+ s = create_socket(test->settings->domain, SOCK_STREAM, test->bind_address, test->bind_dev, test->bind_port, test->server_hostname, test->server_port, &server_res);
+ if (s < 0) {
+ i_errno = IESTREAMCONNECT;
+ return -1;
+ }
+
+ /* Set socket options */
+ if (test->no_delay) {
+ opt = 1;
+ if (setsockopt(s, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof(opt)) < 0) {
+ saved_errno = errno;
+ close(s);
+ freeaddrinfo(server_res);
+ errno = saved_errno;
+ i_errno = IESETNODELAY;
+ return -1;
+ }
+ }
+ if ((opt = test->settings->mss)) {
+ if (setsockopt(s, IPPROTO_TCP, TCP_MAXSEG, &opt, sizeof(opt)) < 0) {
+ saved_errno = errno;
+ close(s);
+ freeaddrinfo(server_res);
+ errno = saved_errno;
+ i_errno = IESETMSS;
+ return -1;
+ }
+ }
+ if ((opt = test->settings->socket_bufsize)) {
+ if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &opt, sizeof(opt)) < 0) {
+ saved_errno = errno;
+ close(s);
+ freeaddrinfo(server_res);
+ errno = saved_errno;
+ i_errno = IESETBUF;
+ return -1;
+ }
+ if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &opt, sizeof(opt)) < 0) {
+ saved_errno = errno;
+ close(s);
+ freeaddrinfo(server_res);
+ errno = saved_errno;
+ i_errno = IESETBUF;
+ return -1;
+ }
+ }
+#if defined(HAVE_TCP_USER_TIMEOUT)
+ if ((opt = test->settings->snd_timeout)) {
+ if (setsockopt(s, IPPROTO_TCP, TCP_USER_TIMEOUT, &opt, sizeof(opt)) < 0) {
+ saved_errno = errno;
+ close(s);
+ freeaddrinfo(server_res);
+ errno = saved_errno;
+ i_errno = IESETUSERTIMEOUT;
+ return -1;
+ }
+ }
+#endif /* HAVE_TCP_USER_TIMEOUT */
+
+ /* Read back and verify the sender socket buffer size */
+ optlen = sizeof(sndbuf_actual);
+ if (getsockopt(s, SOL_SOCKET, SO_SNDBUF, &sndbuf_actual, &optlen) < 0) {
+ saved_errno = errno;
+ close(s);
+ freeaddrinfo(server_res);
+ errno = saved_errno;
+ i_errno = IESETBUF;
+ return -1;
+ }
+ if (test->debug) {
+ printf("SNDBUF is %u, expecting %u\n", sndbuf_actual, test->settings->socket_bufsize);
+ }
+ if (test->settings->socket_bufsize && test->settings->socket_bufsize > sndbuf_actual) {
+ i_errno = IESETBUF2;
+ return -1;
+ }
+
+ /* Read back and verify the receiver socket buffer size */
+ optlen = sizeof(rcvbuf_actual);
+ if (getsockopt(s, SOL_SOCKET, SO_RCVBUF, &rcvbuf_actual, &optlen) < 0) {
+ saved_errno = errno;
+ close(s);
+ freeaddrinfo(server_res);
+ errno = saved_errno;
+ i_errno = IESETBUF;
+ return -1;
+ }
+ if (test->debug) {
+ printf("RCVBUF is %u, expecting %u\n", rcvbuf_actual, test->settings->socket_bufsize);
+ }
+ if (test->settings->socket_bufsize && test->settings->socket_bufsize > rcvbuf_actual) {
+ i_errno = IESETBUF2;
+ return -1;
+ }
+
+ if (test->json_output) {
+ cJSON *sock_bufsize_item = cJSON_GetObjectItem(test->json_start, "sock_bufsize");
+ if (sock_bufsize_item == NULL) {
+ cJSON_AddNumberToObject(test->json_start, "sock_bufsize", test->settings->socket_bufsize);
+ }
+
+ cJSON *sndbuf_actual_item = cJSON_GetObjectItem(test->json_start, "sndbuf_actual");
+ if (sndbuf_actual_item == NULL) {
+ cJSON_AddNumberToObject(test->json_start, "sndbuf_actual", sndbuf_actual);
+ }
+
+ cJSON *rcvbuf_actual_item = cJSON_GetObjectItem(test->json_start, "rcvbuf_actual");
+ if (rcvbuf_actual_item == NULL) {
+ cJSON_AddNumberToObject(test->json_start, "rcvbuf_actual", rcvbuf_actual);
+ }
+ }
+
+#if defined(HAVE_FLOWLABEL)
+ if (test->settings->flowlabel) {
+ if (server_res->ai_addr->sa_family != AF_INET6) {
+ saved_errno = errno;
+ close(s);
+ freeaddrinfo(server_res);
+ errno = saved_errno;
+ i_errno = IESETFLOW;
+ return -1;
+ } else {
+ struct sockaddr_in6* sa6P = (struct sockaddr_in6*) server_res->ai_addr;
+ char freq_buf[sizeof(struct in6_flowlabel_req)];
+ struct in6_flowlabel_req *freq = (struct in6_flowlabel_req *)freq_buf;
+ int freq_len = sizeof(*freq);
+
+ memset(freq, 0, sizeof(*freq));
+ freq->flr_label = htonl(test->settings->flowlabel & IPV6_FLOWINFO_FLOWLABEL);
+ freq->flr_action = IPV6_FL_A_GET;
+ freq->flr_flags = IPV6_FL_F_CREATE;
+ freq->flr_share = IPV6_FL_S_ANY;
+ memcpy(&freq->flr_dst, &sa6P->sin6_addr, 16);
+
+ if (setsockopt(s, IPPROTO_IPV6, IPV6_FLOWLABEL_MGR, freq, freq_len) < 0) {
+ saved_errno = errno;
+ close(s);
+ freeaddrinfo(server_res);
+ errno = saved_errno;
+ i_errno = IESETFLOW;
+ return -1;
+ }
+ sa6P->sin6_flowinfo = freq->flr_label;
+
+ opt = 1;
+ if (setsockopt(s, IPPROTO_IPV6, IPV6_FLOWINFO_SEND, &opt, sizeof(opt)) < 0) {
+ saved_errno = errno;
+ close(s);
+ freeaddrinfo(server_res);
+ errno = saved_errno;
+ i_errno = IESETFLOW;
+ return -1;
+ }
+ }
+ }
+#endif /* HAVE_FLOWLABEL */
+
+#if defined(HAVE_SO_MAX_PACING_RATE)
+ /* If socket pacing is specified try to enable it. */
+ if (test->settings->fqrate) {
+ /* Convert bits per second to bytes per second */
+ unsigned int fqrate = test->settings->fqrate / 8;
+ if (fqrate > 0) {
+ if (test->debug) {
+ printf("Setting fair-queue socket pacing to %u\n", fqrate);
+ }
+ if (setsockopt(s, SOL_SOCKET, SO_MAX_PACING_RATE, &fqrate, sizeof(fqrate)) < 0) {
+ warning("Unable to set socket pacing");
+ }
+ }
+ }
+#endif /* HAVE_SO_MAX_PACING_RATE */
+ {
+ unsigned int rate = test->settings->rate / 8;
+ if (rate > 0) {
+ if (test->debug) {
+ printf("Setting application pacing to %u\n", rate);
+ }
+ }
+ }
+
+ /* Set common socket options */
+ iperf_common_sockopts(test, s);
+
+ if (connect(s, (struct sockaddr *) server_res->ai_addr, server_res->ai_addrlen) < 0 && errno != EINPROGRESS) {
+ saved_errno = errno;
+ close(s);
+ freeaddrinfo(server_res);
+ errno = saved_errno;
+ i_errno = IESTREAMCONNECT;
+ return -1;
+ }
+
+ freeaddrinfo(server_res);
+
+ /* Send cookie for verification */
+ if (Nwrite(s, test->cookie, COOKIE_SIZE, Ptcp) < 0) {
+ saved_errno = errno;
+ close(s);
+ errno = saved_errno;
+ i_errno = IESENDCOOKIE;
+ return -1;
+ }
+
+ return s;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-11 23:56:03 +0000