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/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#include "common.h"
#include "posix.h"
#include "netops.h"
#include "stream.h"
#include "socket_stream.h"
#ifndef _WIN32
# include <sys/types.h>
# include <sys/socket.h>
# include <sys/select.h>
# include <sys/time.h>
# include <netdb.h>
# include <netinet/in.h>
# include <arpa/inet.h>
#else
# include <winsock2.h>
# include <ws2tcpip.h>
# ifdef _MSC_VER
# pragma comment(lib, "ws2_32")
# endif
#endif
#ifdef GIT_WIN32
static void net_set_error(const char *str)
{
int error = WSAGetLastError();
char * win32_error = git_win32_get_error_message(error);
if (win32_error) {
giterr_set(GITERR_NET, "%s: %s", str, win32_error);
git__free(win32_error);
} else {
giterr_set(GITERR_NET, str);
}
}
#else
static void net_set_error(const char *str)
{
giterr_set(GITERR_NET, "%s: %s", str, strerror(errno));
}
#endif
static int close_socket(GIT_SOCKET s)
{
if (s == INVALID_SOCKET)
return 0;
#ifdef GIT_WIN32
if (SOCKET_ERROR == closesocket(s))
return -1;
if (0 != WSACleanup()) {
giterr_set(GITERR_OS, "Winsock cleanup failed");
return -1;
}
return 0;
#else
return close(s);
#endif
}
int socket_connect(git_stream *stream)
{
struct addrinfo *info = NULL, *p;
struct addrinfo hints;
git_socket_stream *st = (git_socket_stream *) stream;
GIT_SOCKET s = INVALID_SOCKET;
int ret;
#ifdef GIT_WIN32
/* on win32, the WSA context needs to be initialized
* before any socket calls can be performed */
WSADATA wsd;
if (WSAStartup(MAKEWORD(2,2), &wsd) != 0) {
giterr_set(GITERR_OS, "Winsock init failed");
return -1;
}
if (LOBYTE(wsd.wVersion) != 2 || HIBYTE(wsd.wVersion) != 2) {
WSACleanup();
giterr_set(GITERR_OS, "Winsock init failed");
return -1;
}
#endif
memset(&hints, 0x0, sizeof(struct addrinfo));
hints.ai_socktype = SOCK_STREAM;
hints.ai_family = AF_UNSPEC;
if ((ret = p_getaddrinfo(st->host, st->port, &hints, &info)) != 0) {
giterr_set(GITERR_NET,
"Failed to resolve address for %s: %s", st->host, p_gai_strerror(ret));
return -1;
}
for (p = info; p != NULL; p = p->ai_next) {
s = socket(p->ai_family, p->ai_socktype, p->ai_protocol);
if (s == INVALID_SOCKET) {
net_set_error("error creating socket");
break;
}
if (connect(s, p->ai_addr, (socklen_t)p->ai_addrlen) == 0)
break;
/* If we can't connect, try the next one */
close_socket(s);
s = INVALID_SOCKET;
}
/* Oops, we couldn't connect to any address */
if (s == INVALID_SOCKET && p == NULL) {
giterr_set(GITERR_OS, "Failed to connect to %s", st->host);
p_freeaddrinfo(info);
return -1;
}
st->s = s;
p_freeaddrinfo(info);
return 0;
}
ssize_t socket_write(git_stream *stream, const char *data, size_t len, int flags)
{
ssize_t ret;
size_t off = 0;
git_socket_stream *st = (git_socket_stream *) stream;
while (off < len) {
errno = 0;
ret = p_send(st->s, data + off, len - off, flags);
if (ret < 0) {
net_set_error("Error sending data");
return -1;
}
off += ret;
}
return off;
}
ssize_t socket_read(git_stream *stream, void *data, size_t len)
{
ssize_t ret;
git_socket_stream *st = (git_socket_stream *) stream;
if ((ret = p_recv(st->s, data, len, 0)) < 0)
net_set_error("Error receiving socket data");
return ret;
}
int socket_close(git_stream *stream)
{
git_socket_stream *st = (git_socket_stream *) stream;
int error;
error = close_socket(st->s);
st->s = INVALID_SOCKET;
return error;
}
void socket_free(git_stream *stream)
{
git_socket_stream *st = (git_socket_stream *) stream;
git__free(st->host);
git__free(st->port);
git__free(st);
}
int git_socket_stream_new(git_stream **out, const char *host, const char *port)
{
git_socket_stream *st;
assert(out && host);
st = git__calloc(1, sizeof(git_socket_stream));
GITERR_CHECK_ALLOC(st);
st->host = git__strdup(host);
GITERR_CHECK_ALLOC(st->host);
if (port) {
st->port = git__strdup(port);
GITERR_CHECK_ALLOC(st->port);
}
st->parent.version = GIT_STREAM_VERSION;
st->parent.connect = socket_connect;
st->parent.write = socket_write;
st->parent.read = socket_read;
st->parent.close = socket_close;
st->parent.free = socket_free;
st->s = INVALID_SOCKET;
*out = (git_stream *) st;
return 0;
}
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