Mercurial > hg > nginx-quic
view src/event/ngx_event_connect.c @ 4162:fb1375e8b68c stable-1.0
Merging r4036, r4055, r4056, r4057, r4058, r4059, r4060, r4061, r4062, r4063,
r4064:
Ranges related fixes:
The "max_ranges" directive.
"max_ranges 0" disables ranges support at all,
"max_ranges 1" allows the single range, etc.
By default number of ranges is unlimited, to be precise, 2^31-1.
If client requests more ranges than "max_ranges" permits,
nginx disables ranges and returns just the source response.
If total size of all ranges is greater than source response size,
then nginx disables ranges and returns just the source response.
This fix should not affect well-behaving applications but will defeat
DoS attempts exploiting malicious byte ranges.
Now unsatisfiable ranges are processed according to RFC 2616.
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Fri, 30 Sep 2011 14:06:08 +0000 |
parents | d518c65ff0d4 |
children | d620f497c50f |
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/* * Copyright (C) Igor Sysoev */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> #include <ngx_event_connect.h> ngx_int_t ngx_event_connect_peer(ngx_peer_connection_t *pc) { int rc; ngx_int_t event; ngx_err_t err; ngx_uint_t level; ngx_socket_t s; ngx_event_t *rev, *wev; ngx_connection_t *c; rc = pc->get(pc, pc->data); if (rc != NGX_OK) { return rc; } s = ngx_socket(pc->sockaddr->sa_family, SOCK_STREAM, 0); ngx_log_debug1(NGX_LOG_DEBUG_EVENT, pc->log, 0, "socket %d", s); if (s == -1) { ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno, ngx_socket_n " failed"); return NGX_ERROR; } c = ngx_get_connection(s, pc->log); if (c == NULL) { if (ngx_close_socket(s) == -1) { ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno, ngx_close_socket_n "failed"); } return NGX_ERROR; } if (pc->rcvbuf) { if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, (const void *) &pc->rcvbuf, sizeof(int)) == -1) { ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno, "setsockopt(SO_RCVBUF) failed"); goto failed; } } if (ngx_nonblocking(s) == -1) { ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno, ngx_nonblocking_n " failed"); goto failed; } if (pc->local) { if (bind(s, pc->local->sockaddr, pc->local->socklen) == -1) { ngx_log_error(NGX_LOG_CRIT, pc->log, ngx_socket_errno, "bind(%V) failed", &pc->local->name); goto failed; } } c->recv = ngx_recv; c->send = ngx_send; c->recv_chain = ngx_recv_chain; c->send_chain = ngx_send_chain; c->sendfile = 1; c->log_error = pc->log_error; if (pc->sockaddr->sa_family != AF_INET) { c->tcp_nopush = NGX_TCP_NOPUSH_DISABLED; c->tcp_nodelay = NGX_TCP_NODELAY_DISABLED; #if (NGX_SOLARIS) /* Solaris's sendfilev() supports AF_NCA, AF_INET, and AF_INET6 */ c->sendfile = 0; #endif } rev = c->read; wev = c->write; rev->log = pc->log; wev->log = pc->log; pc->connection = c; c->number = ngx_atomic_fetch_add(ngx_connection_counter, 1); #if (NGX_THREADS) /* TODO: lock event when call completion handler */ rev->lock = pc->lock; wev->lock = pc->lock; rev->own_lock = &c->lock; wev->own_lock = &c->lock; #endif if (ngx_add_conn) { if (ngx_add_conn(c) == NGX_ERROR) { goto failed; } } ngx_log_debug3(NGX_LOG_DEBUG_EVENT, pc->log, 0, "connect to %V, fd:%d #%d", pc->name, s, c->number); rc = connect(s, pc->sockaddr, pc->socklen); if (rc == -1) { err = ngx_socket_errno; if (err != NGX_EINPROGRESS #if (NGX_WIN32) /* Winsock returns WSAEWOULDBLOCK (NGX_EAGAIN) */ && err != NGX_EAGAIN #endif ) { if (err == NGX_ECONNREFUSED #if (NGX_LINUX) /* * Linux returns EAGAIN instead of ECONNREFUSED * for unix sockets if listen queue is full */ || err == NGX_EAGAIN #endif || err == NGX_ECONNRESET || err == NGX_ENETDOWN || err == NGX_ENETUNREACH || err == NGX_EHOSTDOWN || err == NGX_EHOSTUNREACH) { level = NGX_LOG_ERR; } else { level = NGX_LOG_CRIT; } ngx_log_error(level, c->log, err, "connect() to %V failed", pc->name); return NGX_DECLINED; } } 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"); goto failed; } /* * 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) { goto failed; } if (rc == -1) { /* NGX_EINPROGRESS */ if (ngx_add_event(wev, NGX_WRITE_EVENT, event) != NGX_OK) { goto failed; } return NGX_AGAIN; } ngx_log_debug0(NGX_LOG_DEBUG_EVENT, pc->log, 0, "connected"); wev->ready = 1; return NGX_OK; failed: ngx_free_connection(c); if (ngx_close_socket(s) == -1) { ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno, ngx_close_socket_n " failed"); } return NGX_ERROR; } ngx_int_t ngx_event_get_peer(ngx_peer_connection_t *pc, void *data) { return NGX_OK; }