Mercurial > hg > nginx-quic
view src/stream/ngx_stream_access_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 | 8807a2369b1a |
children | 2f41d383c9c7 |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_stream.h> typedef struct { in_addr_t mask; in_addr_t addr; ngx_uint_t deny; /* unsigned deny:1; */ } ngx_stream_access_rule_t; #if (NGX_HAVE_INET6) typedef struct { struct in6_addr addr; struct in6_addr mask; ngx_uint_t deny; /* unsigned deny:1; */ } ngx_stream_access_rule6_t; #endif #if (NGX_HAVE_UNIX_DOMAIN) typedef struct { ngx_uint_t deny; /* unsigned deny:1; */ } ngx_stream_access_rule_un_t; #endif typedef struct { ngx_array_t *rules; /* array of ngx_stream_access_rule_t */ #if (NGX_HAVE_INET6) ngx_array_t *rules6; /* array of ngx_stream_access_rule6_t */ #endif #if (NGX_HAVE_UNIX_DOMAIN) ngx_array_t *rules_un; /* array of ngx_stream_access_rule_un_t */ #endif } ngx_stream_access_srv_conf_t; static ngx_int_t ngx_stream_access_handler(ngx_stream_session_t *s); static ngx_int_t ngx_stream_access_inet(ngx_stream_session_t *s, ngx_stream_access_srv_conf_t *ascf, in_addr_t addr); #if (NGX_HAVE_INET6) static ngx_int_t ngx_stream_access_inet6(ngx_stream_session_t *s, ngx_stream_access_srv_conf_t *ascf, u_char *p); #endif #if (NGX_HAVE_UNIX_DOMAIN) static ngx_int_t ngx_stream_access_unix(ngx_stream_session_t *s, ngx_stream_access_srv_conf_t *ascf); #endif static ngx_int_t ngx_stream_access_found(ngx_stream_session_t *s, ngx_uint_t deny); static char *ngx_stream_access_rule(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static void *ngx_stream_access_create_srv_conf(ngx_conf_t *cf); static char *ngx_stream_access_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child); static ngx_int_t ngx_stream_access_init(ngx_conf_t *cf); static ngx_command_t ngx_stream_access_commands[] = { { ngx_string("allow"), NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1, ngx_stream_access_rule, NGX_STREAM_SRV_CONF_OFFSET, 0, NULL }, { ngx_string("deny"), NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1, ngx_stream_access_rule, NGX_STREAM_SRV_CONF_OFFSET, 0, NULL }, ngx_null_command }; static ngx_stream_module_t ngx_stream_access_module_ctx = { ngx_stream_access_init, /* postconfiguration */ NULL, /* create main configuration */ NULL, /* init main configuration */ ngx_stream_access_create_srv_conf, /* create server configuration */ ngx_stream_access_merge_srv_conf /* merge server configuration */ }; ngx_module_t ngx_stream_access_module = { NGX_MODULE_V1, &ngx_stream_access_module_ctx, /* module context */ ngx_stream_access_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 ngx_int_t ngx_stream_access_handler(ngx_stream_session_t *s) { struct sockaddr_in *sin; ngx_stream_access_srv_conf_t *ascf; #if (NGX_HAVE_INET6) u_char *p; in_addr_t addr; struct sockaddr_in6 *sin6; #endif ascf = ngx_stream_get_module_srv_conf(s, ngx_stream_access_module); switch (s->connection->sockaddr->sa_family) { case AF_INET: if (ascf->rules) { sin = (struct sockaddr_in *) s->connection->sockaddr; return ngx_stream_access_inet(s, ascf, sin->sin_addr.s_addr); } break; #if (NGX_HAVE_INET6) case AF_INET6: sin6 = (struct sockaddr_in6 *) s->connection->sockaddr; p = sin6->sin6_addr.s6_addr; if (ascf->rules && IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { addr = p[12] << 24; addr += p[13] << 16; addr += p[14] << 8; addr += p[15]; return ngx_stream_access_inet(s, ascf, htonl(addr)); } if (ascf->rules6) { return ngx_stream_access_inet6(s, ascf, p); } break; #endif #if (NGX_HAVE_UNIX_DOMAIN) case AF_UNIX: if (ascf->rules_un) { return ngx_stream_access_unix(s, ascf); } break; #endif } return NGX_DECLINED; } static ngx_int_t ngx_stream_access_inet(ngx_stream_session_t *s, ngx_stream_access_srv_conf_t *ascf, in_addr_t addr) { ngx_uint_t i; ngx_stream_access_rule_t *rule; rule = ascf->rules->elts; for (i = 0; i < ascf->rules->nelts; i++) { ngx_log_debug3(NGX_LOG_DEBUG_STREAM, s->connection->log, 0, "access: %08XD %08XD %08XD", addr, rule[i].mask, rule[i].addr); if ((addr & rule[i].mask) == rule[i].addr) { return ngx_stream_access_found(s, rule[i].deny); } } return NGX_DECLINED; } #if (NGX_HAVE_INET6) static ngx_int_t ngx_stream_access_inet6(ngx_stream_session_t *s, ngx_stream_access_srv_conf_t *ascf, u_char *p) { ngx_uint_t n; ngx_uint_t i; ngx_stream_access_rule6_t *rule6; rule6 = ascf->rules6->elts; for (i = 0; i < ascf->rules6->nelts; i++) { #if (NGX_DEBUG) { size_t cl, ml, al; u_char ct[NGX_INET6_ADDRSTRLEN]; u_char mt[NGX_INET6_ADDRSTRLEN]; u_char at[NGX_INET6_ADDRSTRLEN]; cl = ngx_inet6_ntop(p, ct, NGX_INET6_ADDRSTRLEN); ml = ngx_inet6_ntop(rule6[i].mask.s6_addr, mt, NGX_INET6_ADDRSTRLEN); al = ngx_inet6_ntop(rule6[i].addr.s6_addr, at, NGX_INET6_ADDRSTRLEN); ngx_log_debug6(NGX_LOG_DEBUG_STREAM, s->connection->log, 0, "access: %*s %*s %*s", cl, ct, ml, mt, al, at); } #endif for (n = 0; n < 16; n++) { if ((p[n] & rule6[i].mask.s6_addr[n]) != rule6[i].addr.s6_addr[n]) { goto next; } } return ngx_stream_access_found(s, rule6[i].deny); next: continue; } return NGX_DECLINED; } #endif #if (NGX_HAVE_UNIX_DOMAIN) static ngx_int_t ngx_stream_access_unix(ngx_stream_session_t *s, ngx_stream_access_srv_conf_t *ascf) { ngx_uint_t i; ngx_stream_access_rule_un_t *rule_un; rule_un = ascf->rules_un->elts; for (i = 0; i < ascf->rules_un->nelts; i++) { /* TODO: check path */ if (1) { return ngx_stream_access_found(s, rule_un[i].deny); } } return NGX_DECLINED; } #endif static ngx_int_t ngx_stream_access_found(ngx_stream_session_t *s, ngx_uint_t deny) { if (deny) { ngx_log_error(NGX_LOG_ERR, s->connection->log, 0, "access forbidden by rule"); return NGX_ABORT; } return NGX_OK; } static char * ngx_stream_access_rule(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_stream_access_srv_conf_t *ascf = conf; ngx_int_t rc; ngx_uint_t all; ngx_str_t *value; ngx_cidr_t cidr; ngx_stream_access_rule_t *rule; #if (NGX_HAVE_INET6) ngx_stream_access_rule6_t *rule6; #endif #if (NGX_HAVE_UNIX_DOMAIN) ngx_stream_access_rule_un_t *rule_un; #endif ngx_memzero(&cidr, sizeof(ngx_cidr_t)); value = cf->args->elts; all = (value[1].len == 3 && ngx_strcmp(value[1].data, "all") == 0); if (!all) { #if (NGX_HAVE_UNIX_DOMAIN) if (value[1].len == 5 && ngx_strcmp(value[1].data, "unix:") == 0) { cidr.family = AF_UNIX; rc = NGX_OK; } else { rc = ngx_ptocidr(&value[1], &cidr); } #else rc = ngx_ptocidr(&value[1], &cidr); #endif if (rc == NGX_ERROR) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid parameter \"%V\"", &value[1]); return NGX_CONF_ERROR; } if (rc == NGX_DONE) { ngx_conf_log_error(NGX_LOG_WARN, cf, 0, "low address bits of %V are meaningless", &value[1]); } } if (cidr.family == AF_INET || all) { if (ascf->rules == NULL) { ascf->rules = ngx_array_create(cf->pool, 4, sizeof(ngx_stream_access_rule_t)); if (ascf->rules == NULL) { return NGX_CONF_ERROR; } } rule = ngx_array_push(ascf->rules); if (rule == NULL) { return NGX_CONF_ERROR; } rule->mask = cidr.u.in.mask; rule->addr = cidr.u.in.addr; rule->deny = (value[0].data[0] == 'd') ? 1 : 0; } #if (NGX_HAVE_INET6) if (cidr.family == AF_INET6 || all) { if (ascf->rules6 == NULL) { ascf->rules6 = ngx_array_create(cf->pool, 4, sizeof(ngx_stream_access_rule6_t)); if (ascf->rules6 == NULL) { return NGX_CONF_ERROR; } } rule6 = ngx_array_push(ascf->rules6); if (rule6 == NULL) { return NGX_CONF_ERROR; } rule6->mask = cidr.u.in6.mask; rule6->addr = cidr.u.in6.addr; rule6->deny = (value[0].data[0] == 'd') ? 1 : 0; } #endif #if (NGX_HAVE_UNIX_DOMAIN) if (cidr.family == AF_UNIX || all) { if (ascf->rules_un == NULL) { ascf->rules_un = ngx_array_create(cf->pool, 1, sizeof(ngx_stream_access_rule_un_t)); if (ascf->rules_un == NULL) { return NGX_CONF_ERROR; } } rule_un = ngx_array_push(ascf->rules_un); if (rule_un == NULL) { return NGX_CONF_ERROR; } rule_un->deny = (value[0].data[0] == 'd') ? 1 : 0; } #endif return NGX_CONF_OK; } static void * ngx_stream_access_create_srv_conf(ngx_conf_t *cf) { ngx_stream_access_srv_conf_t *conf; conf = ngx_pcalloc(cf->pool, sizeof(ngx_stream_access_srv_conf_t)); if (conf == NULL) { return NULL; } return conf; } static char * ngx_stream_access_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child) { ngx_stream_access_srv_conf_t *prev = parent; ngx_stream_access_srv_conf_t *conf = child; if (conf->rules == NULL #if (NGX_HAVE_INET6) && conf->rules6 == NULL #endif #if (NGX_HAVE_UNIX_DOMAIN) && conf->rules_un == NULL #endif ) { conf->rules = prev->rules; #if (NGX_HAVE_INET6) conf->rules6 = prev->rules6; #endif #if (NGX_HAVE_UNIX_DOMAIN) conf->rules_un = prev->rules_un; #endif } return NGX_CONF_OK; } static ngx_int_t ngx_stream_access_init(ngx_conf_t *cf) { ngx_stream_core_main_conf_t *cmcf; cmcf = ngx_stream_conf_get_module_main_conf(cf, ngx_stream_core_module); cmcf->access_handler = ngx_stream_access_handler; return NGX_OK; }