Mercurial > hg > nginx-quic
view src/http/modules/ngx_http_realip_module.c @ 4662:979e0f5b196d stable-1.2
Merge of r4616: r->state fix.
Added r->state reset on fastcgi/scgi/uwsgi request start.
Failing to do so results in problems if 400 or 414 requests are
redirected to fastcgi/scgi/uwsgi upstream, as well as after invalid
headers got from upstream. This was already fixed for proxy in r3478,
but fastcgi (the only affected protocol at that time) was missed.
Reported by Matthieu Tourne.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Mon, 04 Jun 2012 10:54:48 +0000 |
parents | b1950b0a9550 |
children | df93068953c0 |
line wrap: on
line source
/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_http.h> #define NGX_HTTP_REALIP_XREALIP 0 #define NGX_HTTP_REALIP_XFWD 1 #define NGX_HTTP_REALIP_HEADER 2 typedef struct { ngx_array_t *from; /* array of ngx_in_cidr_t */ ngx_uint_t type; ngx_uint_t hash; ngx_str_t header; #if (NGX_HAVE_UNIX_DOMAIN) ngx_uint_t unixsock; /* unsigned unixsock:2; */ #endif } ngx_http_realip_loc_conf_t; typedef struct { ngx_connection_t *connection; struct sockaddr *sockaddr; socklen_t socklen; ngx_str_t addr_text; } ngx_http_realip_ctx_t; static ngx_int_t ngx_http_realip_handler(ngx_http_request_t *r); static ngx_int_t ngx_http_realip_set_addr(ngx_http_request_t *r, u_char *ip, size_t len); static void ngx_http_realip_cleanup(void *data); static char *ngx_http_realip_from(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static char *ngx_http_realip(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static void *ngx_http_realip_create_loc_conf(ngx_conf_t *cf); static char *ngx_http_realip_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child); static ngx_int_t ngx_http_realip_init(ngx_conf_t *cf); static ngx_command_t ngx_http_realip_commands[] = { { ngx_string("set_real_ip_from"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_http_realip_from, NGX_HTTP_LOC_CONF_OFFSET, 0, NULL }, { ngx_string("real_ip_header"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_http_realip, NGX_HTTP_LOC_CONF_OFFSET, 0, NULL }, ngx_null_command }; static ngx_http_module_t ngx_http_realip_module_ctx = { NULL, /* preconfiguration */ ngx_http_realip_init, /* postconfiguration */ NULL, /* create main configuration */ NULL, /* init main configuration */ NULL, /* create server configuration */ NULL, /* merge server configuration */ ngx_http_realip_create_loc_conf, /* create location configuration */ ngx_http_realip_merge_loc_conf /* merge location configuration */ }; ngx_module_t ngx_http_realip_module = { NGX_MODULE_V1, &ngx_http_realip_module_ctx, /* module context */ ngx_http_realip_commands, /* module directives */ NGX_HTTP_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_http_realip_handler(ngx_http_request_t *r) { u_char *ip, *p; size_t len; ngx_uint_t i, hash; ngx_list_part_t *part; ngx_table_elt_t *header; struct sockaddr_in *sin; ngx_in_cidr_t *from; ngx_connection_t *c; ngx_http_realip_ctx_t *ctx; ngx_http_realip_loc_conf_t *rlcf; ctx = ngx_http_get_module_ctx(r, ngx_http_realip_module); if (ctx) { return NGX_DECLINED; } rlcf = ngx_http_get_module_loc_conf(r, ngx_http_realip_module); if (rlcf->from == NULL #if (NGX_HAVE_UNIX_DOMAIN) && !rlcf->unixsock #endif ) { return NGX_DECLINED; } switch (rlcf->type) { case NGX_HTTP_REALIP_XREALIP: if (r->headers_in.x_real_ip == NULL) { return NGX_DECLINED; } len = r->headers_in.x_real_ip->value.len; ip = r->headers_in.x_real_ip->value.data; break; case NGX_HTTP_REALIP_XFWD: if (r->headers_in.x_forwarded_for == NULL) { return NGX_DECLINED; } len = r->headers_in.x_forwarded_for->value.len; ip = r->headers_in.x_forwarded_for->value.data; for (p = ip + len - 1; p > ip; p--) { if (*p == ' ' || *p == ',') { p++; len -= p - ip; ip = p; break; } } break; default: /* NGX_HTTP_REALIP_HEADER */ part = &r->headers_in.headers.part; header = part->elts; hash = rlcf->hash; len = rlcf->header.len; p = rlcf->header.data; for (i = 0; /* void */ ; i++) { if (i >= part->nelts) { if (part->next == NULL) { break; } part = part->next; header = part->elts; i = 0; } if (hash == header[i].hash && len == header[i].key.len && ngx_strncmp(p, header[i].lowcase_key, len) == 0) { len = header[i].value.len; ip = header[i].value.data; goto found; } } return NGX_DECLINED; } found: c = r->connection; ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, "realip: \"%s\"", ip); /* AF_INET only */ if (c->sockaddr->sa_family == AF_INET) { sin = (struct sockaddr_in *) c->sockaddr; from = rlcf->from->elts; for (i = 0; i < rlcf->from->nelts; i++) { ngx_log_debug3(NGX_LOG_DEBUG_HTTP, c->log, 0, "realip: %08XD %08XD %08XD", sin->sin_addr.s_addr, from[i].mask, from[i].addr); if ((sin->sin_addr.s_addr & from[i].mask) == from[i].addr) { return ngx_http_realip_set_addr(r, ip, len); } } } #if (NGX_HAVE_UNIX_DOMAIN) if (c->sockaddr->sa_family == AF_UNIX && rlcf->unixsock) { return ngx_http_realip_set_addr(r, ip, len); } #endif return NGX_DECLINED; } static ngx_int_t ngx_http_realip_set_addr(ngx_http_request_t *r, u_char *ip, size_t len) { u_char *p; ngx_int_t rc; ngx_addr_t addr; ngx_connection_t *c; ngx_pool_cleanup_t *cln; ngx_http_realip_ctx_t *ctx; cln = ngx_pool_cleanup_add(r->pool, sizeof(ngx_http_realip_ctx_t)); if (cln == NULL) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } ctx = cln->data; ngx_http_set_ctx(r, ctx, ngx_http_realip_module); c = r->connection; rc = ngx_parse_addr(c->pool, &addr, ip, len); switch (rc) { case NGX_DECLINED: return NGX_DECLINED; case NGX_ERROR: return NGX_HTTP_INTERNAL_SERVER_ERROR; default: /* NGX_OK */ break; } p = ngx_pnalloc(c->pool, len); if (p == NULL) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } ngx_memcpy(p, ip, len); cln->handler = ngx_http_realip_cleanup; ctx->connection = c; ctx->sockaddr = c->sockaddr; ctx->socklen = c->socklen; ctx->addr_text = c->addr_text; c->sockaddr = addr.sockaddr; c->socklen = addr.socklen; c->addr_text.len = len; c->addr_text.data = p; return NGX_DECLINED; } static void ngx_http_realip_cleanup(void *data) { ngx_http_realip_ctx_t *ctx = data; ngx_connection_t *c; c = ctx->connection; c->sockaddr = ctx->sockaddr; c->socklen = ctx->socklen; c->addr_text = ctx->addr_text; } static char * ngx_http_realip_from(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_http_realip_loc_conf_t *rlcf = conf; ngx_int_t rc; ngx_str_t *value; ngx_cidr_t cidr; ngx_in_cidr_t *from; value = cf->args->elts; #if (NGX_HAVE_UNIX_DOMAIN) if (ngx_strcmp(value[1].data, "unix:") == 0) { rlcf->unixsock = 1; return NGX_CONF_OK; } #endif if (rlcf->from == NULL) { rlcf->from = ngx_array_create(cf->pool, 2, sizeof(ngx_in_cidr_t)); if (rlcf->from == NULL) { return NGX_CONF_ERROR; } } from = ngx_array_push(rlcf->from); if (from == NULL) { return NGX_CONF_ERROR; } rc = ngx_ptocidr(&value[1], &cidr); if (rc == NGX_ERROR) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid parameter \"%V\"", &value[1]); return NGX_CONF_ERROR; } if (cidr.family != AF_INET) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "\"set_real_ip_from\" supports IPv4 only"); 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]); } from->mask = cidr.u.in.mask; from->addr = cidr.u.in.addr; return NGX_CONF_OK; } static char * ngx_http_realip(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_http_realip_loc_conf_t *rlcf = conf; ngx_str_t *value; value = cf->args->elts; if (ngx_strcmp(value[1].data, "X-Real-IP") == 0) { rlcf->type = NGX_HTTP_REALIP_XREALIP; return NGX_CONF_OK; } if (ngx_strcmp(value[1].data, "X-Forwarded-For") == 0) { rlcf->type = NGX_HTTP_REALIP_XFWD; return NGX_CONF_OK; } rlcf->type = NGX_HTTP_REALIP_HEADER; rlcf->hash = ngx_hash_strlow(value[1].data, value[1].data, value[1].len); rlcf->header = value[1]; return NGX_CONF_OK; } static void * ngx_http_realip_create_loc_conf(ngx_conf_t *cf) { ngx_http_realip_loc_conf_t *conf; conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_realip_loc_conf_t)); if (conf == NULL) { return NULL; } /* * set by ngx_pcalloc(): * * conf->from = NULL; * conf->hash = 0; * conf->header = { 0, NULL }; */ conf->type = NGX_CONF_UNSET_UINT; #if (NGX_HAVE_UNIX_DOMAIN) conf->unixsock = 2; #endif return conf; } static char * ngx_http_realip_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) { ngx_http_realip_loc_conf_t *prev = parent; ngx_http_realip_loc_conf_t *conf = child; if (conf->from == NULL) { conf->from = prev->from; } #if (NGX_HAVE_UNIX_DOMAIN) if (conf->unixsock == 2) { conf->unixsock = (prev->unixsock == 2) ? 0 : prev->unixsock; } #endif ngx_conf_merge_uint_value(conf->type, prev->type, NGX_HTTP_REALIP_XREALIP); if (conf->header.len == 0) { conf->hash = prev->hash; conf->header = prev->header; } return NGX_CONF_OK; } static ngx_int_t ngx_http_realip_init(ngx_conf_t *cf) { ngx_http_handler_pt *h; ngx_http_core_main_conf_t *cmcf; cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); h = ngx_array_push(&cmcf->phases[NGX_HTTP_POST_READ_PHASE].handlers); if (h == NULL) { return NGX_ERROR; } *h = ngx_http_realip_handler; h = ngx_array_push(&cmcf->phases[NGX_HTTP_PREACCESS_PHASE].handlers); if (h == NULL) { return NGX_ERROR; } *h = ngx_http_realip_handler; return NGX_OK; }