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/*
* Copyright 2013 Google Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
/*
* Wrappers for making L3-independent syscalls.
*/
#include "wrap.h"
#include <arpa/inet.h>
#include <netinet/in.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <unistd.h>
#include "checksum.h"
#include "gre.h"
#include "logging.h"
#include "netdev.h"
#include "packet.h"
#include "packet_checksum.h"
#include "packet_to_string.h"
#include "run.h"
#include "script.h"
#include "tcp_options_iterator.h"
#include "tcp_options_to_string.h"
#include "tcp_packet.h"
int wrap_socket(enum ip_version_t ip_version, int type)
{
int fd = -1;
switch (ip_version) {
case IP_VERSION_4:
fd = socket(AF_INET, type, 0);
if (fd < 0)
die_perror("socket(AF_INET)");
break;
case IP_VERSION_4_MAPPED_6:
case IP_VERSION_6:
fd = socket(AF_INET6, type, 0);
if (fd < 0)
die_perror("socket(AF_INET6)");
break;
default:
die("bad ip_version (%d) in config\n", ip_version);
break;
}
return fd;
}
u16 wrap_bind_listen(int s, enum ip_version_t ip_version, u16 port)
{
switch (ip_version) {
case IP_VERSION_4: {
struct sockaddr_in addr;
socklen_t addrlen = sizeof(addr);
memset(&addr, 0, addrlen);
#ifndef linux
addr.sin_len = addrlen;
#endif
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
if (bind(s, (struct sockaddr *)&addr, addrlen) < 0)
die_perror("bind(AF_INET)");
memset(&addr, 0, sizeof(addr));
if (getsockname(s, (struct sockaddr *)&addr, &addrlen) < 0)
die_perror("getsockname(AF_INET)");
assert(addr.sin_family == AF_INET);
if (listen(s, 100) < 0)
die_perror("listen(AF_INET)");
return ntohs(addr.sin_port);
}
case IP_VERSION_4_MAPPED_6:
case IP_VERSION_6: {
struct sockaddr_in6 addr6;
socklen_t addrlen = sizeof(addr6);
memset(&addr6, 0, addrlen);
addr6.sin6_family = AF_INET6;
addr6.sin6_port = htons(port);
if (bind(s, (struct sockaddr *)&addr6, addrlen) < 0)
die_perror("bind(AF_INET6)");
memset(&addr6, 0, sizeof(addr6));
if (getsockname(s, (struct sockaddr *)&addr6, &addrlen) < 0)
die_perror("getsockname(AF_INET6)");
assert(addr6.sin6_family == AF_INET6);
if (listen(s, 100) < 0)
die_perror("listen(AF_INET6)");
return ntohs(addr6.sin6_port);
}
default:
die("bad ip_version (%d) in config\n", ip_version);
return 0;
}
}
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