Mercurial > hg > nginx-quic
view src/stream/ngx_stream_core_module.c @ 6755:e2f13011343e stable-1.10
HTTP/2: fixed the "http request count is zero" alert.
When the stream is terminated the HEADERS frame can still wait in the output
queue. This frame can't be removed and must be sent to the client anyway,
since HTTP/2 uses stateful compression for headers. So in order to postpone
closing and freeing memory of such stream the special close stream handler
is set to the write event. After the HEADERS frame is sent the write event
is called and the stream will be finally closed.
Some events like receiving a RST_STREAM can trigger the read handler of such
stream in closing state and cause unexpected processing that can result in
another attempt to finalize the request. To prevent it the read handler is
now set to ngx_http_empty_handler.
Thanks to Amazon.
author | Valentin Bartenev <vbart@nginx.com> |
---|---|
date | Thu, 16 Jun 2016 20:55:11 +0300 |
parents | 8f038068f4bc |
children | 6f8254ae61b8 |
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/* * Copyright (C) Roman Arutyunyan * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_stream.h> static void *ngx_stream_core_create_main_conf(ngx_conf_t *cf); static void *ngx_stream_core_create_srv_conf(ngx_conf_t *cf); static char *ngx_stream_core_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child); static char *ngx_stream_core_error_log(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static char *ngx_stream_core_server(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static char *ngx_stream_core_listen(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static ngx_command_t ngx_stream_core_commands[] = { { ngx_string("server"), NGX_STREAM_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS, ngx_stream_core_server, 0, 0, NULL }, { ngx_string("listen"), NGX_STREAM_SRV_CONF|NGX_CONF_1MORE, ngx_stream_core_listen, NGX_STREAM_SRV_CONF_OFFSET, 0, NULL }, { ngx_string("error_log"), NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_1MORE, ngx_stream_core_error_log, NGX_STREAM_SRV_CONF_OFFSET, 0, NULL }, { ngx_string("tcp_nodelay"), NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_FLAG, ngx_conf_set_flag_slot, NGX_STREAM_SRV_CONF_OFFSET, offsetof(ngx_stream_core_srv_conf_t, tcp_nodelay), NULL }, ngx_null_command }; static ngx_stream_module_t ngx_stream_core_module_ctx = { NULL, /* postconfiguration */ ngx_stream_core_create_main_conf, /* create main configuration */ NULL, /* init main configuration */ ngx_stream_core_create_srv_conf, /* create server configuration */ ngx_stream_core_merge_srv_conf /* merge server configuration */ }; ngx_module_t ngx_stream_core_module = { NGX_MODULE_V1, &ngx_stream_core_module_ctx, /* module context */ ngx_stream_core_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_core_create_main_conf(ngx_conf_t *cf) { ngx_stream_core_main_conf_t *cmcf; cmcf = ngx_pcalloc(cf->pool, sizeof(ngx_stream_core_main_conf_t)); if (cmcf == NULL) { return NULL; } if (ngx_array_init(&cmcf->servers, cf->pool, 4, sizeof(ngx_stream_core_srv_conf_t *)) != NGX_OK) { return NULL; } if (ngx_array_init(&cmcf->listen, cf->pool, 4, sizeof(ngx_stream_listen_t)) != NGX_OK) { return NULL; } return cmcf; } static void * ngx_stream_core_create_srv_conf(ngx_conf_t *cf) { ngx_stream_core_srv_conf_t *cscf; cscf = ngx_pcalloc(cf->pool, sizeof(ngx_stream_core_srv_conf_t)); if (cscf == NULL) { return NULL; } /* * set by ngx_pcalloc(): * * cscf->handler = NULL; * cscf->error_log = NULL; */ cscf->file_name = cf->conf_file->file.name.data; cscf->line = cf->conf_file->line; cscf->tcp_nodelay = NGX_CONF_UNSET; return cscf; } static char * ngx_stream_core_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child) { ngx_stream_core_srv_conf_t *prev = parent; ngx_stream_core_srv_conf_t *conf = child; if (conf->handler == NULL) { ngx_log_error(NGX_LOG_EMERG, cf->log, 0, "no handler for server in %s:%ui", conf->file_name, conf->line); return NGX_CONF_ERROR; } if (conf->error_log == NULL) { if (prev->error_log) { conf->error_log = prev->error_log; } else { conf->error_log = &cf->cycle->new_log; } } ngx_conf_merge_value(conf->tcp_nodelay, prev->tcp_nodelay, 1); return NGX_CONF_OK; } static char * ngx_stream_core_error_log(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_stream_core_srv_conf_t *cscf = conf; return ngx_log_set_log(cf, &cscf->error_log); } static char * ngx_stream_core_server(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { char *rv; void *mconf; ngx_uint_t m; ngx_conf_t pcf; ngx_stream_module_t *module; ngx_stream_conf_ctx_t *ctx, *stream_ctx; ngx_stream_core_srv_conf_t *cscf, **cscfp; ngx_stream_core_main_conf_t *cmcf; ctx = ngx_pcalloc(cf->pool, sizeof(ngx_stream_conf_ctx_t)); if (ctx == NULL) { return NGX_CONF_ERROR; } stream_ctx = cf->ctx; ctx->main_conf = stream_ctx->main_conf; /* the server{}'s srv_conf */ ctx->srv_conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_stream_max_module); if (ctx->srv_conf == NULL) { return NGX_CONF_ERROR; } for (m = 0; cf->cycle->modules[m]; m++) { if (cf->cycle->modules[m]->type != NGX_STREAM_MODULE) { continue; } module = cf->cycle->modules[m]->ctx; if (module->create_srv_conf) { mconf = module->create_srv_conf(cf); if (mconf == NULL) { return NGX_CONF_ERROR; } ctx->srv_conf[cf->cycle->modules[m]->ctx_index] = mconf; } } /* the server configuration context */ cscf = ctx->srv_conf[ngx_stream_core_module.ctx_index]; cscf->ctx = ctx; cmcf = ctx->main_conf[ngx_stream_core_module.ctx_index]; cscfp = ngx_array_push(&cmcf->servers); if (cscfp == NULL) { return NGX_CONF_ERROR; } *cscfp = cscf; /* parse inside server{} */ pcf = *cf; cf->ctx = ctx; cf->cmd_type = NGX_STREAM_SRV_CONF; rv = ngx_conf_parse(cf, NULL); *cf = pcf; return rv; } static char * ngx_stream_core_listen(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { size_t len, off; in_port_t port; ngx_str_t *value; ngx_url_t u; ngx_uint_t i, backlog; struct sockaddr *sa; struct sockaddr_in *sin; ngx_stream_listen_t *ls; ngx_stream_core_main_conf_t *cmcf; #if (NGX_HAVE_INET6) struct sockaddr_in6 *sin6; #endif value = cf->args->elts; ngx_memzero(&u, sizeof(ngx_url_t)); u.url = value[1]; u.listen = 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 \"listen\" directive", u.err, &u.url); } return NGX_CONF_ERROR; } cmcf = ngx_stream_conf_get_module_main_conf(cf, ngx_stream_core_module); ls = cmcf->listen.elts; for (i = 0; i < cmcf->listen.nelts; i++) { sa = &ls[i].u.sockaddr; if (sa->sa_family != u.family) { continue; } switch (sa->sa_family) { #if (NGX_HAVE_INET6) case AF_INET6: off = offsetof(struct sockaddr_in6, sin6_addr); len = 16; sin6 = &ls[i].u.sockaddr_in6; port = sin6->sin6_port; break; #endif #if (NGX_HAVE_UNIX_DOMAIN) case AF_UNIX: off = offsetof(struct sockaddr_un, sun_path); len = sizeof(((struct sockaddr_un *) sa)->sun_path); port = 0; break; #endif default: /* AF_INET */ off = offsetof(struct sockaddr_in, sin_addr); len = 4; sin = &ls[i].u.sockaddr_in; port = sin->sin_port; break; } if (ngx_memcmp(ls[i].u.sockaddr_data + off, u.sockaddr + off, len) != 0) { continue; } if (port != u.port) { continue; } ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "duplicate \"%V\" address and port pair", &u.url); return NGX_CONF_ERROR; } ls = ngx_array_push(&cmcf->listen); if (ls == NULL) { return NGX_CONF_ERROR; } ngx_memzero(ls, sizeof(ngx_stream_listen_t)); ngx_memcpy(&ls->u.sockaddr, u.sockaddr, u.socklen); ls->socklen = u.socklen; ls->backlog = NGX_LISTEN_BACKLOG; ls->type = SOCK_STREAM; ls->wildcard = u.wildcard; ls->ctx = cf->ctx; #if (NGX_HAVE_INET6 && defined IPV6_V6ONLY) ls->ipv6only = 1; #endif backlog = 0; for (i = 2; i < cf->args->nelts; i++) { #if !(NGX_WIN32) if (ngx_strcmp(value[i].data, "udp") == 0) { ls->type = SOCK_DGRAM; continue; } #endif if (ngx_strcmp(value[i].data, "bind") == 0) { ls->bind = 1; continue; } if (ngx_strncmp(value[i].data, "backlog=", 8) == 0) { ls->backlog = ngx_atoi(value[i].data + 8, value[i].len - 8); ls->bind = 1; if (ls->backlog == NGX_ERROR || ls->backlog == 0) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid backlog \"%V\"", &value[i]); return NGX_CONF_ERROR; } backlog = 1; continue; } if (ngx_strncmp(value[i].data, "ipv6only=o", 10) == 0) { #if (NGX_HAVE_INET6 && defined IPV6_V6ONLY) u_char buf[NGX_SOCKADDR_STRLEN]; sa = &ls->u.sockaddr; if (sa->sa_family == AF_INET6) { if (ngx_strcmp(&value[i].data[10], "n") == 0) { ls->ipv6only = 1; } else if (ngx_strcmp(&value[i].data[10], "ff") == 0) { ls->ipv6only = 0; } else { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid ipv6only flags \"%s\"", &value[i].data[9]); return NGX_CONF_ERROR; } ls->bind = 1; } else { len = ngx_sock_ntop(sa, ls->socklen, buf, NGX_SOCKADDR_STRLEN, 1); ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "ipv6only is not supported " "on addr \"%*s\", ignored", len, buf); } continue; #else ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "bind ipv6only is not supported " "on this platform"); return NGX_CONF_ERROR; #endif } if (ngx_strcmp(value[i].data, "reuseport") == 0) { #if (NGX_HAVE_REUSEPORT) ls->reuseport = 1; ls->bind = 1; #else ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "reuseport is not supported " "on this platform, ignored"); #endif continue; } if (ngx_strcmp(value[i].data, "ssl") == 0) { #if (NGX_STREAM_SSL) ls->ssl = 1; continue; #else ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "the \"ssl\" parameter requires " "ngx_stream_ssl_module"); return NGX_CONF_ERROR; #endif } if (ngx_strncmp(value[i].data, "so_keepalive=", 13) == 0) { if (ngx_strcmp(&value[i].data[13], "on") == 0) { ls->so_keepalive = 1; } else if (ngx_strcmp(&value[i].data[13], "off") == 0) { ls->so_keepalive = 2; } else { #if (NGX_HAVE_KEEPALIVE_TUNABLE) u_char *p, *end; ngx_str_t s; end = value[i].data + value[i].len; s.data = value[i].data + 13; p = ngx_strlchr(s.data, end, ':'); if (p == NULL) { p = end; } if (p > s.data) { s.len = p - s.data; ls->tcp_keepidle = ngx_parse_time(&s, 1); if (ls->tcp_keepidle == (time_t) NGX_ERROR) { goto invalid_so_keepalive; } } s.data = (p < end) ? (p + 1) : end; p = ngx_strlchr(s.data, end, ':'); if (p == NULL) { p = end; } if (p > s.data) { s.len = p - s.data; ls->tcp_keepintvl = ngx_parse_time(&s, 1); if (ls->tcp_keepintvl == (time_t) NGX_ERROR) { goto invalid_so_keepalive; } } s.data = (p < end) ? (p + 1) : end; if (s.data < end) { s.len = end - s.data; ls->tcp_keepcnt = ngx_atoi(s.data, s.len); if (ls->tcp_keepcnt == NGX_ERROR) { goto invalid_so_keepalive; } } if (ls->tcp_keepidle == 0 && ls->tcp_keepintvl == 0 && ls->tcp_keepcnt == 0) { goto invalid_so_keepalive; } ls->so_keepalive = 1; #else ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "the \"so_keepalive\" parameter accepts " "only \"on\" or \"off\" on this platform"); return NGX_CONF_ERROR; #endif } ls->bind = 1; continue; #if (NGX_HAVE_KEEPALIVE_TUNABLE) invalid_so_keepalive: ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid so_keepalive value: \"%s\"", &value[i].data[13]); return NGX_CONF_ERROR; #endif } ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "the invalid \"%V\" parameter", &value[i]); return NGX_CONF_ERROR; } if (ls->type == SOCK_DGRAM) { if (backlog) { return "\"backlog\" parameter is incompatible with \"udp\""; } #if (NGX_STREAM_SSL) if (ls->ssl) { return "\"ssl\" parameter is incompatible with \"udp\""; } #endif if (ls->so_keepalive) { return "\"so_keepalive\" parameter is incompatible with \"udp\""; } } return NGX_CONF_OK; }