Mercurial > hg > nginx
view src/core/ngx_resolver.c @ 647:95d7da23ea53 release-0.3.45
nginx-0.3.45-RELEASE import
*) Feature: the "ssl_verify_client", "ssl_verify_depth", and
"ssl_client_certificate" directives.
*) Change: the $request_method variable now returns the main request
method.
*) Change: the ° symbol codes were changed in koi-win conversion
table.
*) Feature: the euro and N symbols were added to koi-win conversion
table.
*) Bugfix: if nginx distributed the requests among several backends and
some backend failed, then requests intended for this backend was
directed to one live backend only instead of being distributed among
the rest.
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Sat, 06 May 2006 16:28:56 +0000 |
parents | 4e296b7d25bf |
children | 80901499140d |
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/* * Copyright (C) Igor Sysoev */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> typedef struct { ngx_connection_t *connection; struct sockaddr *sockaddr; socklen_t socklen; ngx_str_r server; ngx_str_r name; ngx_event_handler_pt handler; ngx_log_t *pool; ngx_log_t *log; } ngx_resolver_t; ngx_int_t ngx_gethostbyname(ngx_resolver_t *r) { ngx_socket_t s; if (r->connection) { return NGX_OK; } s = ngx_socket(AF_INET, SOCK_DGRAM, 0); ngx_log_debug1(NGX_LOG_DEBUG_EVENT, r->log, 0, "socket %d", s); if (s == -1) { ngx_log_error(NGX_LOG_ALERT, r->log, ngx_socket_errno, ngx_socket_n " failed"); return NGX_ERROR; } c = ngx_get_connection(s, r->log); if (c == NULL) { if (ngx_close_socket(s) == -1) { ngx_log_error(NGX_LOG_ALERT, r->log, ngx_socket_errno, ngx_close_socket_n "failed"); } return NGX_ERROR; } rev = c->read; wev = c->write; rev->log = pc->log; wev->log = pc->log; r->connection = c; /* * TODO: MT: - ngx_atomic_fetch_add() * or protection by critical section or mutex * * TODO: MP: - allocated in a shared memory * - ngx_atomic_fetch_add() * or protection by critical section or mutex */ c->number = ngx_atomic_fetch_add(ngx_connection_counter, 1); #if (NGX_THREADS) rev->lock = pc->lock; wev->lock = pc->lock; rev->own_lock = &c->lock; wev->own_lock = &c->lock; #endif ngx_log_debug3(NGX_LOG_DEBUG_EVENT, pc->log, 0, "connect to %V, fd:%d #%d", &r->server, s, c->number); rc = connect(s, r->sockaddr, r->socklen); if (rc == -1) { ngx_log_error(level, r->log, ngx_socket_errno, "connect() to %V failed", &r->server); return NGX_ERROR; } if (ngx_add_conn) { if (ngx_add_conn(c) == NGX_ERROR) { return NGX_ERROR; } } if (ngx_add_conn) { if (rc == -1) { /* NGX_EINPROGRESS */ return NGX_AGAIN; } ngx_log_debug0(NGX_LOG_DEBUG_EVENT, pc->log, 0, "connected"); wev->ready = 1; return NGX_OK; } if (ngx_event_flags & NGX_USE_AIO_EVENT) { ngx_log_debug1(NGX_LOG_DEBUG_EVENT, pc->log, ngx_socket_errno, "connect(): %d", rc); /* aio, iocp */ if (ngx_blocking(s) == -1) { ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno, ngx_blocking_n " failed"); return NGX_ERROR; } /* * FreeBSD's aio allows to post an operation on non-connected socket. * NT does not support it. * * TODO: check in Win32, etc. As workaround we can use NGX_ONESHOT_EVENT */ rev->ready = 1; wev->ready = 1; return NGX_OK; } if (ngx_event_flags & NGX_USE_CLEAR_EVENT) { /* kqueue */ event = NGX_CLEAR_EVENT; } else { /* select, poll, /dev/poll */ event = NGX_LEVEL_EVENT; } if (ngx_add_event(rev, NGX_READ_EVENT, event) != NGX_OK) { return NGX_ERROR; } if (rc == -1) { /* NGX_EINPROGRESS */ if (ngx_add_event(wev, NGX_WRITE_EVENT, event) != NGX_OK) { return NGX_ERROR; } return NGX_AGAIN; } ngx_log_debug0(NGX_LOG_DEBUG_EVENT, pc->log, 0, "connected"); wev->ready = 1; return NGX_OK; }