diff options
Diffstat (limited to 'src/stream/ngx_stream.c')
| -rw-r--r-- | src/stream/ngx_stream.c | 557 |
1 files changed, 557 insertions, 0 deletions
diff --git a/src/stream/ngx_stream.c b/src/stream/ngx_stream.c new file mode 100644 index 000000000..f982170c1 --- /dev/null +++ b/src/stream/ngx_stream.c @@ -0,0 +1,557 @@ + +/* + * Copyright (C) Roman Arutyunyan + * Copyright (C) Nginx, Inc. + */ + + +#include <ngx_config.h> +#include <ngx_core.h> +#include <ngx_event.h> +#include <ngx_stream.h> + + +static char *ngx_stream_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); +static ngx_int_t ngx_stream_add_ports(ngx_conf_t *cf, ngx_array_t *ports, + ngx_stream_listen_t *listen); +static char *ngx_stream_optimize_servers(ngx_conf_t *cf, ngx_array_t *ports); +static ngx_int_t ngx_stream_add_addrs(ngx_conf_t *cf, ngx_stream_port_t *stport, + ngx_stream_conf_addr_t *addr); +#if (NGX_HAVE_INET6) +static ngx_int_t ngx_stream_add_addrs6(ngx_conf_t *cf, + ngx_stream_port_t *stport, ngx_stream_conf_addr_t *addr); +#endif +static ngx_int_t ngx_stream_cmp_conf_addrs(const void *one, const void *two); + + +ngx_uint_t ngx_stream_max_module; + + +static ngx_command_t ngx_stream_commands[] = { + + { ngx_string("stream"), + NGX_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS, + ngx_stream_block, + 0, + 0, + NULL }, + + ngx_null_command +}; + + +static ngx_core_module_t ngx_stream_module_ctx = { + ngx_string("stream"), + NULL, + NULL +}; + + +ngx_module_t ngx_stream_module = { + NGX_MODULE_V1, + &ngx_stream_module_ctx, /* module context */ + ngx_stream_commands, /* module directives */ + NGX_CORE_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 char * +ngx_stream_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) +{ + char *rv; + ngx_uint_t i, m, mi, s; + ngx_conf_t pcf; + ngx_array_t ports; + ngx_stream_listen_t *listen; + ngx_stream_module_t *module; + ngx_stream_conf_ctx_t *ctx; + ngx_stream_core_srv_conf_t **cscfp; + ngx_stream_core_main_conf_t *cmcf; + + /* the main stream context */ + + ctx = ngx_pcalloc(cf->pool, sizeof(ngx_stream_conf_ctx_t)); + if (ctx == NULL) { + return NGX_CONF_ERROR; + } + + *(ngx_stream_conf_ctx_t **) conf = ctx; + + /* count the number of the stream modules and set up their indices */ + + ngx_stream_max_module = 0; + for (m = 0; ngx_modules[m]; m++) { + if (ngx_modules[m]->type != NGX_STREAM_MODULE) { + continue; + } + + ngx_modules[m]->ctx_index = ngx_stream_max_module++; + } + + + /* the stream main_conf context, it's the same in the all stream contexts */ + + ctx->main_conf = ngx_pcalloc(cf->pool, + sizeof(void *) * ngx_stream_max_module); + if (ctx->main_conf == NULL) { + return NGX_CONF_ERROR; + } + + + /* + * the stream null srv_conf context, it is used to merge + * the server{}s' srv_conf's + */ + + ctx->srv_conf = ngx_pcalloc(cf->pool, + sizeof(void *) * ngx_stream_max_module); + if (ctx->srv_conf == NULL) { + return NGX_CONF_ERROR; + } + + + /* + * create the main_conf's and the null srv_conf's of the all stream modules + */ + + for (m = 0; ngx_modules[m]; m++) { + if (ngx_modules[m]->type != NGX_STREAM_MODULE) { + continue; + } + + module = ngx_modules[m]->ctx; + mi = ngx_modules[m]->ctx_index; + + if (module->create_main_conf) { + ctx->main_conf[mi] = module->create_main_conf(cf); + if (ctx->main_conf[mi] == NULL) { + return NGX_CONF_ERROR; + } + } + + if (module->create_srv_conf) { + ctx->srv_conf[mi] = module->create_srv_conf(cf); + if (ctx->srv_conf[mi] == NULL) { + return NGX_CONF_ERROR; + } + } + } + + + /* parse inside the stream{} block */ + + pcf = *cf; + cf->ctx = ctx; + + cf->module_type = NGX_STREAM_MODULE; + cf->cmd_type = NGX_STREAM_MAIN_CONF; + rv = ngx_conf_parse(cf, NULL); + + if (rv != NGX_CONF_OK) { + *cf = pcf; + return rv; + } + + + /* init stream{} main_conf's, merge the server{}s' srv_conf's */ + + cmcf = ctx->main_conf[ngx_stream_core_module.ctx_index]; + cscfp = cmcf->servers.elts; + + for (m = 0; ngx_modules[m]; m++) { + if (ngx_modules[m]->type != NGX_STREAM_MODULE) { + continue; + } + + module = ngx_modules[m]->ctx; + mi = ngx_modules[m]->ctx_index; + + /* init stream{} main_conf's */ + + cf->ctx = ctx; + + if (module->init_main_conf) { + rv = module->init_main_conf(cf, ctx->main_conf[mi]); + if (rv != NGX_CONF_OK) { + *cf = pcf; + return rv; + } + } + + for (s = 0; s < cmcf->servers.nelts; s++) { + + /* merge the server{}s' srv_conf's */ + + cf->ctx = cscfp[s]->ctx; + + if (module->merge_srv_conf) { + rv = module->merge_srv_conf(cf, + ctx->srv_conf[mi], + cscfp[s]->ctx->srv_conf[mi]); + if (rv != NGX_CONF_OK) { + *cf = pcf; + return rv; + } + } + } + } + + *cf = pcf; + + + if (ngx_array_init(&ports, cf->temp_pool, 4, sizeof(ngx_stream_conf_port_t)) + != NGX_OK) + { + return NGX_CONF_ERROR; + } + + listen = cmcf->listen.elts; + + for (i = 0; i < cmcf->listen.nelts; i++) { + if (ngx_stream_add_ports(cf, &ports, &listen[i]) != NGX_OK) { + return NGX_CONF_ERROR; + } + } + + return ngx_stream_optimize_servers(cf, &ports); +} + + +static ngx_int_t +ngx_stream_add_ports(ngx_conf_t *cf, ngx_array_t *ports, + ngx_stream_listen_t *listen) +{ + in_port_t p; + ngx_uint_t i; + struct sockaddr *sa; + struct sockaddr_in *sin; + ngx_stream_conf_port_t *port; + ngx_stream_conf_addr_t *addr; +#if (NGX_HAVE_INET6) + struct sockaddr_in6 *sin6; +#endif + + sa = (struct sockaddr *) &listen->sockaddr; + + switch (sa->sa_family) { + +#if (NGX_HAVE_INET6) + case AF_INET6: + sin6 = (struct sockaddr_in6 *) sa; + p = sin6->sin6_port; + break; +#endif + +#if (NGX_HAVE_UNIX_DOMAIN) + case AF_UNIX: + p = 0; + break; +#endif + + default: /* AF_INET */ + sin = (struct sockaddr_in *) sa; + p = sin->sin_port; + break; + } + + port = ports->elts; + for (i = 0; i < ports->nelts; i++) { + if (p == port[i].port && sa->sa_family == port[i].family) { + + /* a port is already in the port list */ + + port = &port[i]; + goto found; + } + } + + /* add a port to the port list */ + + port = ngx_array_push(ports); + if (port == NULL) { + return NGX_ERROR; + } + + port->family = sa->sa_family; + port->port = p; + + if (ngx_array_init(&port->addrs, cf->temp_pool, 2, + sizeof(ngx_stream_conf_addr_t)) + != NGX_OK) + { + return NGX_ERROR; + } + +found: + + addr = ngx_array_push(&port->addrs); + if (addr == NULL) { + return NGX_ERROR; + } + + addr->sockaddr = (struct sockaddr *) &listen->sockaddr; + addr->socklen = listen->socklen; + addr->ctx = listen->ctx; + addr->bind = listen->bind; + addr->wildcard = listen->wildcard; + addr->so_keepalive = listen->so_keepalive; +#if (NGX_HAVE_KEEPALIVE_TUNABLE) + addr->tcp_keepidle = listen->tcp_keepidle; + addr->tcp_keepintvl = listen->tcp_keepintvl; + addr->tcp_keepcnt = listen->tcp_keepcnt; +#endif +#if (NGX_STREAM_SSL) + addr->ssl = listen->ssl; +#endif +#if (NGX_HAVE_INET6 && defined IPV6_V6ONLY) + addr->ipv6only = listen->ipv6only; +#endif + + return NGX_OK; +} + + +static char * +ngx_stream_optimize_servers(ngx_conf_t *cf, ngx_array_t *ports) +{ + ngx_uint_t i, p, last, bind_wildcard; + ngx_listening_t *ls; + ngx_stream_port_t *stport; + ngx_stream_conf_port_t *port; + ngx_stream_conf_addr_t *addr; + ngx_stream_core_srv_conf_t *cscf; + + port = ports->elts; + for (p = 0; p < ports->nelts; p++) { + + ngx_sort(port[p].addrs.elts, (size_t) port[p].addrs.nelts, + sizeof(ngx_stream_conf_addr_t), ngx_stream_cmp_conf_addrs); + + addr = port[p].addrs.elts; + last = port[p].addrs.nelts; + + /* + * if there is the binding to the "*:port" then we need to bind() + * to the "*:port" only and ignore the other bindings + */ + + if (addr[last - 1].wildcard) { + addr[last - 1].bind = 1; + bind_wildcard = 1; + + } else { + bind_wildcard = 0; + } + + i = 0; + + while (i < last) { + + if (bind_wildcard && !addr[i].bind) { + i++; + continue; + } + + ls = ngx_create_listening(cf, addr[i].sockaddr, addr[i].socklen); + if (ls == NULL) { + return NGX_CONF_ERROR; + } + + ls->addr_ntop = 1; + ls->handler = ngx_stream_init_connection; + ls->pool_size = 256; + + cscf = addr->ctx->srv_conf[ngx_stream_core_module.ctx_index]; + ls->logp = cscf->error_log; + + ls->log.data = &ls->addr_text; + ls->log.handler = ngx_accept_log_error; + + ls->keepalive = addr[i].so_keepalive; +#if (NGX_HAVE_KEEPALIVE_TUNABLE) + ls->keepidle = addr[i].tcp_keepidle; + ls->keepintvl = addr[i].tcp_keepintvl; + ls->keepcnt = addr[i].tcp_keepcnt; +#endif + +#if (NGX_HAVE_INET6 && defined IPV6_V6ONLY) + ls->ipv6only = addr[i].ipv6only; +#endif + + stport = ngx_palloc(cf->pool, sizeof(ngx_stream_port_t)); + if (stport == NULL) { + return NGX_CONF_ERROR; + } + + ls->servers = stport; + + if (i == last - 1) { + stport->naddrs = last; + + } else { + stport->naddrs = 1; + i = 0; + } + + switch (ls->sockaddr->sa_family) { +#if (NGX_HAVE_INET6) + case AF_INET6: + if (ngx_stream_add_addrs6(cf, stport, addr) != NGX_OK) { + return NGX_CONF_ERROR; + } + break; +#endif + default: /* AF_INET */ + if (ngx_stream_add_addrs(cf, stport, addr) != NGX_OK) { + return NGX_CONF_ERROR; + } + break; + } + + addr++; + last--; + } + } + + return NGX_CONF_OK; +} + + +static ngx_int_t +ngx_stream_add_addrs(ngx_conf_t *cf, ngx_stream_port_t *stport, + ngx_stream_conf_addr_t *addr) +{ + u_char *p; + size_t len; + ngx_uint_t i; + struct sockaddr_in *sin; + ngx_stream_in_addr_t *addrs; + u_char buf[NGX_SOCKADDR_STRLEN]; + + stport->addrs = ngx_pcalloc(cf->pool, + stport->naddrs * sizeof(ngx_stream_in_addr_t)); + if (stport->addrs == NULL) { + return NGX_ERROR; + } + + addrs = stport->addrs; + + for (i = 0; i < stport->naddrs; i++) { + + sin = (struct sockaddr_in *) addr[i].sockaddr; + addrs[i].addr = sin->sin_addr.s_addr; + + addrs[i].conf.ctx = addr[i].ctx; +#if (NGX_STREAM_SSL) + addrs[i].conf.ssl = addr[i].ssl; +#endif + + len = ngx_sock_ntop(addr[i].sockaddr, addr[i].socklen, buf, + NGX_SOCKADDR_STRLEN, 1); + + p = ngx_pnalloc(cf->pool, len); + if (p == NULL) { + return NGX_ERROR; + } + + ngx_memcpy(p, buf, len); + + addrs[i].conf.addr_text.len = len; + addrs[i].conf.addr_text.data = p; + } + + return NGX_OK; +} + + +#if (NGX_HAVE_INET6) + +static ngx_int_t +ngx_stream_add_addrs6(ngx_conf_t *cf, ngx_stream_port_t *stport, + ngx_stream_conf_addr_t *addr) +{ + u_char *p; + size_t len; + ngx_uint_t i; + struct sockaddr_in6 *sin6; + ngx_stream_in6_addr_t *addrs6; + u_char buf[NGX_SOCKADDR_STRLEN]; + + stport->addrs = ngx_pcalloc(cf->pool, + stport->naddrs * sizeof(ngx_stream_in6_addr_t)); + if (stport->addrs == NULL) { + return NGX_ERROR; + } + + addrs6 = stport->addrs; + + for (i = 0; i < stport->naddrs; i++) { + + sin6 = (struct sockaddr_in6 *) addr[i].sockaddr; + addrs6[i].addr6 = sin6->sin6_addr; + + addrs6[i].conf.ctx = addr[i].ctx; +#if (NGX_STREAM_SSL) + addrs6[i].conf.ssl = addr[i].ssl; +#endif + + len = ngx_sock_ntop(addr[i].sockaddr, addr[i].socklen, buf, + NGX_SOCKADDR_STRLEN, 1); + + p = ngx_pnalloc(cf->pool, len); + if (p == NULL) { + return NGX_ERROR; + } + + ngx_memcpy(p, buf, len); + + addrs6[i].conf.addr_text.len = len; + addrs6[i].conf.addr_text.data = p; + } + + return NGX_OK; +} + +#endif + + +static ngx_int_t +ngx_stream_cmp_conf_addrs(const void *one, const void *two) +{ + ngx_stream_conf_addr_t *first, *second; + + first = (ngx_stream_conf_addr_t *) one; + second = (ngx_stream_conf_addr_t *) two; + + if (first->wildcard) { + /* a wildcard must be the last resort, shift it to the end */ + return 1; + } + + if (second->wildcard) { + /* a wildcard must be the last resort, shift it to the end */ + return -1; + } + + if (first->bind && !second->bind) { + /* shift explicit bind()ed addresses to the start */ + return -1; + } + + if (!first->bind && second->bind) { + /* shift explicit bind()ed addresses to the start */ + return 1; + } + + /* do not sort by default */ + + return 0; +} |