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src/stream/ngx_stream_pass_module.c - nginx source code
Global variables defined
Data types defined
Functions defined
Macros defined
Source code
- #include <ngx_config.h>
- #include <ngx_core.h>
- #include <ngx_stream.h>
- #define NGX_STREAM_PASS_MAX_PASSES 10
- 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_check_cycle(ngx_connection_t *c);
- static void ngx_stream_pass_cleanup(void *data);
- 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,
- NULL,
- NULL,
- NULL,
- ngx_stream_pass_create_srv_conf,
- NULL
- };
- ngx_module_t ngx_stream_pass_module = {
- NGX_MODULE_V1,
- &ngx_stream_pass_module_ctx,
- ngx_stream_pass_commands,
- NGX_STREAM_MODULE,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- 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->type == SOCK_DGRAM) {
- ngx_log_error(NGX_LOG_ERR, c->log, 0, "cannot pass udp connection");
- goto failed;
- }
- 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);
- if (ngx_stream_pass_check_cycle(c) != NGX_OK) {
- goto failed;
- }
- 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_check_cycle(ngx_connection_t *c)
- {
- ngx_uint_t *num;
- ngx_pool_cleanup_t *cln;
- for (cln = c->pool->cleanup; cln; cln = cln->next) {
- if (cln->handler != ngx_stream_pass_cleanup) {
- continue;
- }
- num = cln->data;
- if (++(*num) > NGX_STREAM_PASS_MAX_PASSES) {
- ngx_log_error(NGX_LOG_ERR, c->log, 0, "stream pass cycle");
- return NGX_ERROR;
- }
- return NGX_OK;
- }
- cln = ngx_pool_cleanup_add(c->pool, sizeof(ngx_uint_t));
- if (cln == NULL) {
- return NGX_ERROR;
- }
- cln->handler = ngx_stream_pass_cleanup;
- num = cln->data;
- *num = 1;
- return NGX_OK;
- }
- static void
- ngx_stream_pass_cleanup(void *data)
- {
- return;
- }
- static ngx_int_t
- ngx_stream_pass_match(ngx_listening_t *ls, ngx_addr_t *addr)
- {
- if (ls->type == SOCK_DGRAM) {
- return NGX_DECLINED;
- }
- 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;
- }
-
- 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;
- }
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