1 files changed, 244 insertions, 0 deletions
diff --git a/src/collectors/plugins.d/pluginsd_parser.h b/src/collectors/plugins.d/pluginsd_parser.h
new file mode 100644
index 000000000..d317a77be
--- /dev/null
+++ b/src/collectors/plugins.d/pluginsd_parser.h
@@ -0,0 +1,244 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef NETDATA_PLUGINSD_PARSER_H
+#define NETDATA_PLUGINSD_PARSER_H
+
+#include "daemon/common.h"
+
+#define WORKER_PARSER_FIRST_JOB 3
+
+// this has to be in-sync with the same at receiver.c
+#define WORKER_RECEIVER_JOB_REPLICATION_COMPLETION (WORKER_PARSER_FIRST_JOB - 3)
+
+// this controls the max response size of a function
+#define PLUGINSD_MAX_DEFERRED_SIZE (100 * 1024 * 1024)
+
+#define PLUGINSD_MIN_RRDSET_POINTERS_CACHE 1024
+
+#define HOST_LABEL_IS_EPHEMERAL "_is_ephemeral"
+// PARSER return codes
+typedef enum __attribute__ ((__packed__)) parser_rc {
+    PARSER_RC_OK,       // Callback was successful, go on
+    PARSER_RC_STOP,     // Callback says STOP
+    PARSER_RC_ERROR     // Callback failed (abort rest of callbacks)
+} PARSER_RC;
+
+typedef enum __attribute__ ((__packed__)) parser_input_type {
+    PARSER_INPUT_SPLIT          = (1 << 1),
+    PARSER_DEFER_UNTIL_KEYWORD  = (1 << 2),
+} PARSER_INPUT_TYPE;
+
+typedef enum __attribute__ ((__packed__)) {
+    PARSER_INIT_PLUGINSD        = (1 << 1),
+    PARSER_INIT_STREAMING       = (1 << 2),
+    PARSER_REP_METADATA         = (1 << 3),
+} PARSER_REPERTOIRE;
+
+struct parser;
+typedef PARSER_RC (*keyword_function)(char **words, size_t num_words, struct parser *parser);
+
+typedef struct parser_keyword {
+    char *keyword;
+    size_t id;
+    PARSER_REPERTOIRE repertoire;
+    size_t worker_job_id;
+} PARSER_KEYWORD;
+
+typedef struct parser_user_object {
+    bool cleanup_slots;
+    RRDSET *st;
+    RRDHOST *host;
+    void    *opaque;
+    struct plugind *cd;
+    int trust_durations;
+    RRDLABELS *new_host_labels;
+    RRDLABELS *chart_rrdlabels_linked_temporarily;
+    size_t data_collections_count;
+    int enabled;
+
+#ifdef NETDATA_LOG_STREAM_RECEIVE
+    FILE *stream_log_fp;
+    PARSER_REPERTOIRE stream_log_repertoire;
+#endif
+
+    STREAM_CAPABILITIES capabilities; // receiver capabilities
+
+    struct {
+        bool parsing_host;
+        uuid_t machine_guid;
+        char machine_guid_str[UUID_STR_LEN];
+        STRING *hostname;
+        RRDLABELS *rrdlabels;
+    } host_define;
+
+    struct parser_user_object_replay {
+        time_t start_time;
+        time_t end_time;
+
+        usec_t start_time_ut;
+        usec_t end_time_ut;
+
+        time_t wall_clock_time;
+
+        bool rset_enabled;
+    } replay;
+
+    struct parser_user_object_v2 {
+        bool locked_data_collection;
+        RRDSET_STREAM_BUFFER stream_buffer; // sender capabilities in this
+        time_t update_every;
+        time_t end_time;
+        time_t wall_clock_time;
+        bool ml_locked;
+    } v2;
+} PARSER_USER_OBJECT;
+
+typedef struct parser {
+    uint8_t version;                // Parser version
+    PARSER_REPERTOIRE repertoire;
+    uint32_t flags;
+    int fd;                         // Socket
+    FILE *fp_input;                 // Input source e.g. stream
+    FILE *fp_output;                // Stream to send commands to plugin
+
+#ifdef ENABLE_HTTPS
+    NETDATA_SSL *ssl_output;
+#endif
+#ifdef ENABLE_H2O
+    void *h2o_ctx;                  // if set we use h2o_stream functions to send data
+#endif
+
+    PARSER_USER_OBJECT user;        // User defined structure to hold extra state between calls
+
+    struct buffered_reader reader;
+    struct line_splitter line;
+    const PARSER_KEYWORD *keyword;
+
+    struct {
+        const char *end_keyword;
+        BUFFER *response;
+        void (*action)(struct parser *parser, void *action_data);
+        void *action_data;
+    } defer;
+
+    struct {
+        DICTIONARY *functions;
+        usec_t smaller_monotonic_timeout_ut;
+    } inflight;
+
+    struct {
+        SPINLOCK spinlock;
+    } writer;
+
+} PARSER;
+
+PARSER *parser_init(struct parser_user_object *user, FILE *fp_input, FILE *fp_output, int fd, PARSER_INPUT_TYPE flags, void *ssl);
+void parser_init_repertoire(PARSER *parser, PARSER_REPERTOIRE repertoire);
+void parser_destroy(PARSER *working_parser);
+void pluginsd_cleanup_v2(PARSER *parser);
+void pluginsd_keywords_init(PARSER *parser, PARSER_REPERTOIRE repertoire);
+PARSER_RC parser_execute(PARSER *parser, const PARSER_KEYWORD *keyword, char **words, size_t num_words);
+
+static inline int find_first_keyword(const char *src, char *dst, int dst_size, bool *isspace_map) {
+    const char *s = src, *keyword_start;
+
+    while (unlikely(isspace_map[(uint8_t)*s])) s++;
+    keyword_start = s;
+
+    while (likely(*s && !isspace_map[(uint8_t)*s]) && dst_size > 1) {
+        *dst++ = *s++;
+        dst_size--;
+    }
+    *dst = '\0';
+    return dst_size == 0 ? 0 : (int) (s - keyword_start);
+}
+
+const PARSER_KEYWORD *gperf_lookup_keyword(register const char *str, register size_t len);
+
+static inline const PARSER_KEYWORD *parser_find_keyword(PARSER *parser, const char *command) {
+    const PARSER_KEYWORD *t = gperf_lookup_keyword(command, strlen(command));
+    if(t && (t->repertoire & parser->repertoire))
+        return t;
+
+    return NULL;
+}
+
+bool parser_reconstruct_node(BUFFER *wb, void *ptr);
+bool parser_reconstruct_instance(BUFFER *wb, void *ptr);
+bool parser_reconstruct_context(BUFFER *wb, void *ptr);
+
+static inline int parser_action(PARSER *parser, char *input) {
+#ifdef NETDATA_LOG_STREAM_RECEIVE
+    static __thread char line[PLUGINSD_LINE_MAX + 1];
+    strncpyz(line, input, sizeof(line) - 1);
+#endif
+
+    parser->line.count++;
+
+    if(unlikely(parser->flags & PARSER_DEFER_UNTIL_KEYWORD)) {
+        char command[100 + 1];
+        bool has_keyword = find_first_keyword(input, command, 100, isspace_map_pluginsd);
+
+        if(!has_keyword || strcmp(command, parser->defer.end_keyword) != 0) {
+            if(parser->defer.response) {
+                buffer_strcat(parser->defer.response, input);
+                if(buffer_strlen(parser->defer.response) > PLUGINSD_MAX_DEFERRED_SIZE) {
+                    // more than PLUGINSD_MAX_DEFERRED_SIZE of data,
+                    // or a bad plugin that did not send the end_keyword
+                    nd_log(NDLS_DAEMON, NDLP_ERR, "PLUGINSD: deferred response is too big (%zu bytes). Stopping this plugin.", buffer_strlen(parser->defer.response));
+                    return 1;
+                }
+            }
+            return 0;
+        }
+        else {
+            // call the action
+            parser->defer.action(parser, parser->defer.action_data);
+
+            // empty everything
+            parser->defer.action = NULL;
+            parser->defer.action_data = NULL;
+            parser->defer.end_keyword = NULL;
+            parser->defer.response = NULL;
+            parser->flags &= ~PARSER_DEFER_UNTIL_KEYWORD;
+        }
+        return 0;
+    }
+
+    parser->line.num_words = quoted_strings_splitter_pluginsd(input, parser->line.words, PLUGINSD_MAX_WORDS);
+    const char *command = get_word(parser->line.words, parser->line.num_words, 0);
+
+    if(unlikely(!command)) {
+        line_splitter_reset(&parser->line);
+        return 0;
+    }
+
+    PARSER_RC rc;
+    parser->keyword = parser_find_keyword(parser, command);
+    if(likely(parser->keyword)) {
+        worker_is_busy(parser->keyword->worker_job_id);
+
+#ifdef NETDATA_LOG_STREAM_RECEIVE
+        if(parser->user.stream_log_fp && parser->keyword->repertoire & parser->user.stream_log_repertoire)
+            fprintf(parser->user.stream_log_fp, "%s", line);
+#endif
+
+        rc = parser_execute(parser, parser->keyword, parser->line.words, parser->line.num_words);
+        // rc = (*t->func)(words, num_words, parser);
+        worker_is_idle();
+    }
+    else
+        rc = PARSER_RC_ERROR;
+
+    if(rc == PARSER_RC_ERROR) {
+        CLEAN_BUFFER *wb = buffer_create(1024, NULL);
+        line_splitter_reconstruct_line(wb, &parser->line);
+        netdata_log_error("PLUGINSD: parser_action('%s') failed on line %zu: { %s } (quotes added to show parsing)",
+                command, parser->line.count, buffer_tostring(wb));
+    }
+
+    line_splitter_reset(&parser->line);
+    return (rc == PARSER_RC_ERROR || rc == PARSER_RC_STOP);
+}
+
+#endif //NETDATA_PLUGINSD_PARSER_H