Current File : //proc/self/root/usr/src/node-v0.10.4/deps/uv/src/unix/tcp.c
/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include "uv.h"
#include "internal.h"
#include <stdlib.h>
#include <unistd.h>
#include <assert.h>
#include <errno.h>
int uv_tcp_init(uv_loop_t* loop, uv_tcp_t* tcp) {
uv__stream_init(loop, (uv_stream_t*)tcp, UV_TCP);
return 0;
}
static int maybe_new_socket(uv_tcp_t* handle, int domain, int flags) {
int sockfd;
if (uv__stream_fd(handle) != -1)
return 0;
sockfd = uv__socket(domain, SOCK_STREAM, 0);
if (sockfd == -1)
return uv__set_sys_error(handle->loop, errno);
if (uv__stream_open((uv_stream_t*)handle, sockfd, flags)) {
close(sockfd);
return -1;
}
return 0;
}
static int uv__bind(uv_tcp_t* tcp,
int domain,
struct sockaddr* addr,
int addrsize) {
int on;
if (maybe_new_socket(tcp, domain, UV_STREAM_READABLE|UV_STREAM_WRITABLE))
return -1;
on = 1;
if (setsockopt(tcp->io_watcher.fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)))
return uv__set_sys_error(tcp->loop, errno);
errno = 0;
if (bind(tcp->io_watcher.fd, addr, addrsize) && errno != EADDRINUSE)
return uv__set_sys_error(tcp->loop, errno);
tcp->delayed_error = errno;
return 0;
}
static int uv__connect(uv_connect_t* req,
uv_tcp_t* handle,
struct sockaddr* addr,
socklen_t addrlen,
uv_connect_cb cb) {
int r;
assert(handle->type == UV_TCP);
if (handle->connect_req)
return uv__set_sys_error(handle->loop, EALREADY);
if (maybe_new_socket(handle,
addr->sa_family,
UV_STREAM_READABLE|UV_STREAM_WRITABLE)) {
return -1;
}
handle->delayed_error = 0;
do
r = connect(uv__stream_fd(handle), addr, addrlen);
while (r == -1 && errno == EINTR);
if (r == -1) {
if (errno == EINPROGRESS)
; /* not an error */
else if (errno == ECONNREFUSED)
/* If we get a ECONNREFUSED wait until the next tick to report the
* error. Solaris wants to report immediately--other unixes want to
* wait.
*/
handle->delayed_error = errno;
else
return uv__set_sys_error(handle->loop, errno);
}
uv__req_init(handle->loop, req, UV_CONNECT);
req->cb = cb;
req->handle = (uv_stream_t*) handle;
ngx_queue_init(&req->queue);
handle->connect_req = req;
uv__io_start(handle->loop, &handle->io_watcher, UV__POLLOUT);
if (handle->delayed_error)
uv__io_feed(handle->loop, &handle->io_watcher);
return 0;
}
int uv__tcp_bind(uv_tcp_t* handle, struct sockaddr_in addr) {
return uv__bind(handle,
AF_INET,
(struct sockaddr*)&addr,
sizeof(struct sockaddr_in));
}
int uv__tcp_bind6(uv_tcp_t* handle, struct sockaddr_in6 addr) {
return uv__bind(handle,
AF_INET6,
(struct sockaddr*)&addr,
sizeof(struct sockaddr_in6));
}
int uv_tcp_open(uv_tcp_t* handle, uv_os_sock_t sock) {
return uv__stream_open((uv_stream_t*)handle,
sock,
UV_STREAM_READABLE | UV_STREAM_WRITABLE);
}
int uv_tcp_getsockname(uv_tcp_t* handle, struct sockaddr* name,
int* namelen) {
socklen_t socklen;
int saved_errno;
int rv = 0;
/* Don't clobber errno. */
saved_errno = errno;
if (handle->delayed_error) {
uv__set_sys_error(handle->loop, handle->delayed_error);
rv = -1;
goto out;
}
if (uv__stream_fd(handle) < 0) {
uv__set_sys_error(handle->loop, EINVAL);
rv = -1;
goto out;
}
/* sizeof(socklen_t) != sizeof(int) on some systems. */
socklen = (socklen_t)*namelen;
if (getsockname(uv__stream_fd(handle), name, &socklen) == -1) {
uv__set_sys_error(handle->loop, errno);
rv = -1;
} else {
*namelen = (int)socklen;
}
out:
errno = saved_errno;
return rv;
}
int uv_tcp_getpeername(uv_tcp_t* handle, struct sockaddr* name,
int* namelen) {
socklen_t socklen;
int saved_errno;
int rv = 0;
/* Don't clobber errno. */
saved_errno = errno;
if (handle->delayed_error) {
uv__set_sys_error(handle->loop, handle->delayed_error);
rv = -1;
goto out;
}
if (uv__stream_fd(handle) < 0) {
uv__set_sys_error(handle->loop, EINVAL);
rv = -1;
goto out;
}
/* sizeof(socklen_t) != sizeof(int) on some systems. */
socklen = (socklen_t)*namelen;
if (getpeername(uv__stream_fd(handle), name, &socklen) == -1) {
uv__set_sys_error(handle->loop, errno);
rv = -1;
} else {
*namelen = (int)socklen;
}
out:
errno = saved_errno;
return rv;
}
int uv_tcp_listen(uv_tcp_t* tcp, int backlog, uv_connection_cb cb) {
static int single_accept = -1;
if (tcp->delayed_error)
return uv__set_sys_error(tcp->loop, tcp->delayed_error);
if (single_accept == -1) {
const char* val = getenv("UV_TCP_SINGLE_ACCEPT");
single_accept = (val != NULL && atoi(val) != 0); /* Off by default. */
}
if (single_accept)
tcp->flags |= UV_TCP_SINGLE_ACCEPT;
if (maybe_new_socket(tcp, AF_INET, UV_STREAM_READABLE))
return -1;
if (listen(tcp->io_watcher.fd, backlog))
return uv__set_sys_error(tcp->loop, errno);
tcp->connection_cb = cb;
/* Start listening for connections. */
tcp->io_watcher.cb = uv__server_io;
uv__io_start(tcp->loop, &tcp->io_watcher, UV__POLLIN);
return 0;
}
int uv__tcp_connect(uv_connect_t* req,
uv_tcp_t* handle,
struct sockaddr_in addr,
uv_connect_cb cb) {
int saved_errno;
int status;
saved_errno = errno;
status = uv__connect(req, handle, (struct sockaddr*)&addr, sizeof addr, cb);
errno = saved_errno;
return status;
}
int uv__tcp_connect6(uv_connect_t* req,
uv_tcp_t* handle,
struct sockaddr_in6 addr,
uv_connect_cb cb) {
int saved_errno;
int status;
saved_errno = errno;
status = uv__connect(req, handle, (struct sockaddr*)&addr, sizeof addr, cb);
errno = saved_errno;
return status;
}
int uv__tcp_nodelay(int fd, int on) {
return setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on));
}
int uv__tcp_keepalive(int fd, int on, unsigned int delay) {
if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &on, sizeof(on)))
return -1;
#ifdef TCP_KEEPIDLE
if (on && setsockopt(fd, IPPROTO_TCP, TCP_KEEPIDLE, &delay, sizeof(delay)))
return -1;
#endif
/* Solaris/SmartOS, if you don't support keep-alive,
* then don't advertise it in your system headers...
*/
#if defined(TCP_KEEPALIVE) && !defined(__sun)
if (on && setsockopt(fd, IPPROTO_TCP, TCP_KEEPALIVE, &delay, sizeof(delay)))
return -1;
#endif
return 0;
}
int uv_tcp_nodelay(uv_tcp_t* handle, int on) {
if (uv__stream_fd(handle) != -1)
if (uv__tcp_nodelay(uv__stream_fd(handle), on))
return -1;
if (on)
handle->flags |= UV_TCP_NODELAY;
else
handle->flags &= ~UV_TCP_NODELAY;
return 0;
}
int uv_tcp_keepalive(uv_tcp_t* handle, int on, unsigned int delay) {
if (uv__stream_fd(handle) != -1)
if (uv__tcp_keepalive(uv__stream_fd(handle), on, delay))
return -1;
if (on)
handle->flags |= UV_TCP_KEEPALIVE;
else
handle->flags &= ~UV_TCP_KEEPALIVE;
/* TODO Store delay if uv__stream_fd(handle) == -1 but don't want to enlarge
* uv_tcp_t with an int that's almost never used...
*/
return 0;
}
int uv_tcp_simultaneous_accepts(uv_tcp_t* handle, int enable) {
if (enable)
handle->flags &= ~UV_TCP_SINGLE_ACCEPT;
else
handle->flags |= UV_TCP_SINGLE_ACCEPT;
return 0;
}
void uv__tcp_close(uv_tcp_t* handle) {
uv__stream_close((uv_stream_t*)handle);
}
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