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src/stream/ngx_stream_handler.c - nginx source code
Functions defined
Source code
- #include <ngx_config.h>
- #include <ngx_core.h>
- #include <ngx_event.h>
- #include <ngx_stream.h>
- static void ngx_stream_log_session(ngx_stream_session_t *s);
- static void ngx_stream_close_connection(ngx_connection_t *c);
- static u_char *ngx_stream_log_error(ngx_log_t *log, u_char *buf, size_t len);
- static void ngx_stream_proxy_protocol_handler(ngx_event_t *rev);
- void
- ngx_stream_init_connection(ngx_connection_t *c)
- {
- u_char text[NGX_SOCKADDR_STRLEN];
- size_t len;
- ngx_uint_t i;
- ngx_time_t *tp;
- ngx_event_t *rev;
- struct sockaddr *sa;
- ngx_stream_port_t *port;
- struct sockaddr_in *sin;
- ngx_stream_in_addr_t *addr;
- ngx_stream_session_t *s;
- ngx_stream_conf_ctx_t *ctx;
- ngx_stream_addr_conf_t *addr_conf;
- #if (NGX_HAVE_INET6)
- struct sockaddr_in6 *sin6;
- ngx_stream_in6_addr_t *addr6;
- #endif
- ngx_stream_core_srv_conf_t *cscf;
- ngx_stream_core_main_conf_t *cmcf;
-
- port = c->listening->servers;
- if (port->naddrs > 1) {
-
- if (ngx_connection_local_sockaddr(c, NULL, 0) != NGX_OK) {
- ngx_stream_close_connection(c);
- return;
- }
- sa = c->local_sockaddr;
- switch (sa->sa_family) {
- #if (NGX_HAVE_INET6)
- case AF_INET6:
- sin6 = (struct sockaddr_in6 *) sa;
- addr6 = port->addrs;
-
- for (i = 0; i < port->naddrs - 1; i++) {
- if (ngx_memcmp(&addr6[i].addr6, &sin6->sin6_addr, 16) == 0) {
- break;
- }
- }
- addr_conf = &addr6[i].conf;
- break;
- #endif
- default:
- sin = (struct sockaddr_in *) sa;
- addr = port->addrs;
-
- for (i = 0; i < port->naddrs - 1; i++) {
- if (addr[i].addr == sin->sin_addr.s_addr) {
- break;
- }
- }
- addr_conf = &addr[i].conf;
- break;
- }
- } else {
- switch (c->local_sockaddr->sa_family) {
- #if (NGX_HAVE_INET6)
- case AF_INET6:
- addr6 = port->addrs;
- addr_conf = &addr6[0].conf;
- break;
- #endif
- default:
- addr = port->addrs;
- addr_conf = &addr[0].conf;
- break;
- }
- }
- s = ngx_pcalloc(c->pool, sizeof(ngx_stream_session_t));
- if (s == NULL) {
- ngx_stream_close_connection(c);
- return;
- }
- ctx = addr_conf->default_server->ctx;
- s->signature = NGX_STREAM_MODULE;
- s->main_conf = ctx->main_conf;
- s->srv_conf = ctx->srv_conf;
- s->virtual_names = addr_conf->virtual_names;
- #if (NGX_STREAM_SSL)
- s->ssl = addr_conf->ssl;
- #endif
- if (c->buffer) {
- s->received += c->buffer->last - c->buffer->pos;
- }
- s->connection = c;
- c->data = s;
- cscf = ngx_stream_get_module_srv_conf(s, ngx_stream_core_module);
- ngx_set_connection_log(c, cscf->error_log);
- len = ngx_sock_ntop(c->sockaddr, c->socklen, text, NGX_SOCKADDR_STRLEN, 1);
- ngx_log_error(NGX_LOG_INFO, c->log, 0, "*%uA %sclient %*s connected to %V",
- c->number, c->type == SOCK_DGRAM ? "udp " : "",
- len, text, &c->listening->addr_text);
- c->log->connection = c->number;
- c->log->handler = ngx_stream_log_error;
- c->log->data = s;
- c->log->action = "initializing session";
- c->log_error = NGX_ERROR_INFO;
- s->ctx = ngx_pcalloc(c->pool, sizeof(void *) * ngx_stream_max_module);
- if (s->ctx == NULL) {
- ngx_stream_close_connection(c);
- return;
- }
- cmcf = ngx_stream_get_module_main_conf(s, ngx_stream_core_module);
- s->variables = ngx_pcalloc(s->connection->pool,
- cmcf->variables.nelts
- * sizeof(ngx_stream_variable_value_t));
- if (s->variables == NULL) {
- ngx_stream_close_connection(c);
- return;
- }
- tp = ngx_timeofday();
- s->start_sec = tp->sec;
- s->start_msec = tp->msec;
- rev = c->read;
- rev->handler = ngx_stream_session_handler;
- if (addr_conf->proxy_protocol) {
- c->log->action = "reading PROXY protocol";
- rev->handler = ngx_stream_proxy_protocol_handler;
- if (!rev->ready) {
- ngx_add_timer(rev, cscf->proxy_protocol_timeout);
- if (ngx_handle_read_event(rev, 0) != NGX_OK) {
- ngx_stream_finalize_session(s,
- NGX_STREAM_INTERNAL_SERVER_ERROR);
- }
- return;
- }
- }
- if (ngx_use_accept_mutex) {
- ngx_post_event(rev, &ngx_posted_events);
- return;
- }
- rev->handler(rev);
- }
- static void
- ngx_stream_proxy_protocol_handler(ngx_event_t *rev)
- {
- u_char *p, buf[NGX_PROXY_PROTOCOL_MAX_HEADER];
- size_t size;
- ssize_t n;
- ngx_err_t err;
- ngx_connection_t *c;
- ngx_stream_session_t *s;
- ngx_stream_core_srv_conf_t *cscf;
- c = rev->data;
- s = c->data;
- ngx_log_debug0(NGX_LOG_DEBUG_STREAM, c->log, 0,
- "stream PROXY protocol handler");
- if (rev->timedout) {
- ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out");
- ngx_stream_finalize_session(s, NGX_STREAM_OK);
- return;
- }
- n = recv(c->fd, (char *) buf, sizeof(buf), MSG_PEEK);
- err = ngx_socket_errno;
- ngx_log_debug1(NGX_LOG_DEBUG_STREAM, c->log, 0, "recv(): %z", n);
- if (n == -1) {
- if (err == NGX_EAGAIN) {
- rev->ready = 0;
- if (!rev->timer_set) {
- cscf = ngx_stream_get_module_srv_conf(s,
- ngx_stream_core_module);
- ngx_add_timer(rev, cscf->proxy_protocol_timeout);
- }
- if (ngx_handle_read_event(rev, 0) != NGX_OK) {
- ngx_stream_finalize_session(s,
- NGX_STREAM_INTERNAL_SERVER_ERROR);
- }
- return;
- }
- ngx_connection_error(c, err, "recv() failed");
- ngx_stream_finalize_session(s, NGX_STREAM_OK);
- return;
- }
- if (rev->timer_set) {
- ngx_del_timer(rev);
- }
- p = ngx_proxy_protocol_read(c, buf, buf + n);
- if (p == NULL) {
- ngx_stream_finalize_session(s, NGX_STREAM_BAD_REQUEST);
- return;
- }
- size = p - buf;
- if (c->recv(c, buf, size) != (ssize_t) size) {
- ngx_stream_finalize_session(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
- return;
- }
- c->log->action = "initializing session";
- ngx_stream_session_handler(rev);
- }
- void
- ngx_stream_session_handler(ngx_event_t *rev)
- {
- ngx_connection_t *c;
- ngx_stream_session_t *s;
- c = rev->data;
- s = c->data;
- ngx_stream_core_run_phases(s);
- }
- void
- ngx_stream_finalize_session(ngx_stream_session_t *s, ngx_uint_t rc)
- {
- ngx_log_debug1(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
- "finalize stream session: %i", rc);
- s->status = rc;
- ngx_stream_log_session(s);
- ngx_stream_close_connection(s->connection);
- }
- static void
- ngx_stream_log_session(ngx_stream_session_t *s)
- {
- ngx_uint_t i, n;
- ngx_stream_handler_pt *log_handler;
- ngx_stream_core_main_conf_t *cmcf;
- cmcf = ngx_stream_get_module_main_conf(s, ngx_stream_core_module);
- log_handler = cmcf->phases[NGX_STREAM_LOG_PHASE].handlers.elts;
- n = cmcf->phases[NGX_STREAM_LOG_PHASE].handlers.nelts;
- for (i = 0; i < n; i++) {
- log_handler[i](s);
- }
- }
- static void
- ngx_stream_close_connection(ngx_connection_t *c)
- {
- ngx_pool_t *pool;
- ngx_log_debug1(NGX_LOG_DEBUG_STREAM, c->log, 0,
- "close stream connection: %d", c->fd);
- #if (NGX_STREAM_SSL)
- if (c->ssl) {
- if (ngx_ssl_shutdown(c) == NGX_AGAIN) {
- c->ssl->handler = ngx_stream_close_connection;
- return;
- }
- }
- #endif
- #if (NGX_STAT_STUB)
- (void) ngx_atomic_fetch_add(ngx_stat_active, -1);
- #endif
- pool = c->pool;
- ngx_close_connection(c);
- ngx_destroy_pool(pool);
- }
- static u_char *
- ngx_stream_log_error(ngx_log_t *log, u_char *buf, size_t len)
- {
- u_char *p;
- ngx_stream_session_t *s;
- if (log->action) {
- p = ngx_snprintf(buf, len, " while %s", log->action);
- len -= p - buf;
- buf = p;
- }
- s = log->data;
- p = ngx_snprintf(buf, len, ", %sclient: %V, server: %V",
- s->connection->type == SOCK_DGRAM ? "udp " : "",
- &s->connection->addr_text,
- &s->connection->listening->addr_text);
- len -= p - buf;
- buf = p;
- if (s->log_handler) {
- p = s->log_handler(log, buf, len);
- }
- return p;
- }
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