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Diffstat (limited to 'src/stream/ngx_stream_pass_module.c')
-rw-r--r--src/stream/ngx_stream_pass_module.c276
1 files changed, 276 insertions, 0 deletions
diff --git a/src/stream/ngx_stream_pass_module.c b/src/stream/ngx_stream_pass_module.c
new file mode 100644
index 000000000..2ed0a51c2
--- /dev/null
+++ b/src/stream/ngx_stream_pass_module.c
@@ -0,0 +1,276 @@
+
+/*
+ * Copyright (C) Roman Arutyunyan
+ * Copyright (C) Nginx, Inc.
+ */
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_stream.h>
+
+
+typedef struct {
+ ngx_addr_t *addr;
+ ngx_stream_complex_value_t *addr_value;
+} ngx_stream_pass_srv_conf_t;
+
+
+static void ngx_stream_pass_handler(ngx_stream_session_t *s);
+static ngx_int_t ngx_stream_pass_match(ngx_listening_t *ls, ngx_addr_t *addr);
+static void *ngx_stream_pass_create_srv_conf(ngx_conf_t *cf);
+static char *ngx_stream_pass(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
+
+
+static ngx_command_t ngx_stream_pass_commands[] = {
+
+ { ngx_string("pass"),
+ NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
+ ngx_stream_pass,
+ NGX_STREAM_SRV_CONF_OFFSET,
+ 0,
+ NULL },
+
+ ngx_null_command
+};
+
+
+static ngx_stream_module_t ngx_stream_pass_module_ctx = {
+ NULL, /* preconfiguration */
+ NULL, /* postconfiguration */
+
+ NULL, /* create main configuration */
+ NULL, /* init main configuration */
+
+ ngx_stream_pass_create_srv_conf, /* create server configuration */
+ NULL /* merge server configuration */
+};
+
+
+ngx_module_t ngx_stream_pass_module = {
+ NGX_MODULE_V1,
+ &ngx_stream_pass_module_ctx, /* module context */
+ ngx_stream_pass_commands, /* module directives */
+ NGX_STREAM_MODULE, /* module type */
+ NULL, /* init master */
+ NULL, /* init module */
+ NULL, /* init process */
+ NULL, /* init thread */
+ NULL, /* exit thread */
+ NULL, /* exit process */
+ NULL, /* exit master */
+ NGX_MODULE_V1_PADDING
+};
+
+
+static void
+ngx_stream_pass_handler(ngx_stream_session_t *s)
+{
+ ngx_url_t u;
+ ngx_str_t url;
+ ngx_addr_t *addr;
+ ngx_uint_t i;
+ ngx_listening_t *ls;
+ ngx_connection_t *c;
+ ngx_stream_pass_srv_conf_t *pscf;
+
+ c = s->connection;
+
+ c->log->action = "passing connection to port";
+
+ if (c->buffer && c->buffer->pos != c->buffer->last) {
+ ngx_log_error(NGX_LOG_ERR, c->log, 0,
+ "cannot pass connection with preread data");
+ goto failed;
+ }
+
+ pscf = ngx_stream_get_module_srv_conf(s, ngx_stream_pass_module);
+
+ addr = pscf->addr;
+
+ if (addr == NULL) {
+ if (ngx_stream_complex_value(s, pscf->addr_value, &url) != NGX_OK) {
+ goto failed;
+ }
+
+ ngx_memzero(&u, sizeof(ngx_url_t));
+
+ u.url = url;
+ u.no_resolve = 1;
+
+ if (ngx_parse_url(c->pool, &u) != NGX_OK) {
+ if (u.err) {
+ ngx_log_error(NGX_LOG_ERR, c->log, 0,
+ "%s in pass \"%V\"", u.err, &u.url);
+ }
+
+ goto failed;
+ }
+
+ if (u.naddrs == 0) {
+ ngx_log_error(NGX_LOG_ERR, c->log, 0,
+ "no addresses in pass \"%V\"", &u.url);
+ goto failed;
+ }
+
+ if (u.no_port) {
+ ngx_log_error(NGX_LOG_ERR, c->log, 0,
+ "no port in pass \"%V\"", &u.url);
+ goto failed;
+ }
+
+ addr = &u.addrs[0];
+ }
+
+ ngx_log_debug1(NGX_LOG_DEBUG_STREAM, c->log, 0,
+ "stream pass addr: \"%V\"", &addr->name);
+
+ ls = ngx_cycle->listening.elts;
+
+ for (i = 0; i < ngx_cycle->listening.nelts; i++) {
+
+ if (ngx_stream_pass_match(&ls[i], addr) != NGX_OK) {
+ continue;
+ }
+
+ c->listening = &ls[i];
+
+ c->data = NULL;
+ c->buffer = NULL;
+
+ *c->log = c->listening->log;
+ c->log->handler = NULL;
+ c->log->data = NULL;
+
+ c->local_sockaddr = addr->sockaddr;
+ c->local_socklen = addr->socklen;
+
+ c->listening->handler(c);
+
+ return;
+ }
+
+ ngx_log_error(NGX_LOG_ERR, c->log, 0,
+ "port not found for \"%V\"", &addr->name);
+
+ ngx_stream_finalize_session(s, NGX_STREAM_OK);
+
+ return;
+
+failed:
+
+ ngx_stream_finalize_session(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
+}
+
+
+static ngx_int_t
+ngx_stream_pass_match(ngx_listening_t *ls, ngx_addr_t *addr)
+{
+ if (!ls->wildcard) {
+ return ngx_cmp_sockaddr(ls->sockaddr, ls->socklen,
+ addr->sockaddr, addr->socklen, 1);
+ }
+
+ if (ls->sockaddr->sa_family == addr->sockaddr->sa_family
+ && ngx_inet_get_port(ls->sockaddr) == ngx_inet_get_port(addr->sockaddr))
+ {
+ return NGX_OK;
+ }
+
+ return NGX_DECLINED;
+}
+
+
+static void *
+ngx_stream_pass_create_srv_conf(ngx_conf_t *cf)
+{
+ ngx_stream_pass_srv_conf_t *conf;
+
+ conf = ngx_pcalloc(cf->pool, sizeof(ngx_stream_pass_srv_conf_t));
+ if (conf == NULL) {
+ return NULL;
+ }
+
+ /*
+ * set by ngx_pcalloc():
+ *
+ * conf->addr = NULL;
+ * conf->addr_value = NULL;
+ */
+
+ return conf;
+}
+
+
+static char *
+ngx_stream_pass(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
+{
+ ngx_stream_pass_srv_conf_t *pscf = conf;
+
+ ngx_url_t u;
+ ngx_str_t *value, *url;
+ ngx_stream_complex_value_t cv;
+ ngx_stream_core_srv_conf_t *cscf;
+ ngx_stream_compile_complex_value_t ccv;
+
+ if (pscf->addr || pscf->addr_value) {
+ return "is duplicate";
+ }
+
+ cscf = ngx_stream_conf_get_module_srv_conf(cf, ngx_stream_core_module);
+
+ cscf->handler = ngx_stream_pass_handler;
+
+ value = cf->args->elts;
+
+ url = &value[1];
+
+ ngx_memzero(&ccv, sizeof(ngx_stream_compile_complex_value_t));
+
+ ccv.cf = cf;
+ ccv.value = url;
+ ccv.complex_value = &cv;
+
+ if (ngx_stream_compile_complex_value(&ccv) != NGX_OK) {
+ return NGX_CONF_ERROR;
+ }
+
+ if (cv.lengths) {
+ pscf->addr_value = ngx_palloc(cf->pool,
+ sizeof(ngx_stream_complex_value_t));
+ if (pscf->addr_value == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ *pscf->addr_value = cv;
+
+ return NGX_CONF_OK;
+ }
+
+ ngx_memzero(&u, sizeof(ngx_url_t));
+
+ u.url = *url;
+ u.no_resolve = 1;
+
+ if (ngx_parse_url(cf->pool, &u) != NGX_OK) {
+ if (u.err) {
+ ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+ "%s in \"%V\" of the \"pass\" directive",
+ u.err, &u.url);
+ }
+
+ return NGX_CONF_ERROR;
+ }
+
+ if (u.naddrs == 0) {
+ return "has no addresses";
+ }
+
+ if (u.no_port) {
+ return "has no port";
+ }
+
+ pscf->addr = &u.addrs[0];
+
+ return NGX_CONF_OK;
+}