/*
device.c -- raw socket
Copyright (C) 2002-2005 Ivo Timmermans,
- 2002-2011 Guus Sliepen <guus@tinc-vpn.org>
+ 2002-2014 Guus Sliepen <guus@tinc-vpn.org>
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
#include "system.h"
+#ifdef HAVE_NETPACKET_PACKET_H
#include <netpacket/packet.h>
+#endif
#include "conf.h"
#include "device.h"
#include "route.h"
#include "xalloc.h"
-static char *device_info;
+#if defined(PF_PACKET) && defined(ETH_P_ALL) && defined(AF_PACKET) && defined(SIOCGIFINDEX)
+static const char *device_info = "raw_socket";
static uint64_t device_total_in = 0;
static uint64_t device_total_out = 0;
struct ifreq ifr;
struct sockaddr_ll sa;
- if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
+ if(!get_config_string(lookup_config(config_tree, "Interface"), &iface)) {
iface = xstrdup("eth0");
+ }
- if(!get_config_string(lookup_config(config_tree, "Device"), &device))
+ if(!get_config_string(lookup_config(config_tree, "Device"), &device)) {
device = xstrdup(iface);
-
- device_info = "raw socket";
+ }
if((device_fd = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL))) < 0) {
logger(LOG_ERR, "Could not open %s: %s", device_info,
- strerror(errno));
+ strerror(errno));
return false;
}
+#ifdef FD_CLOEXEC
+ fcntl(device_fd, F_SETFD, FD_CLOEXEC);
+#endif
+
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_ifrn.ifrn_name, iface, IFNAMSIZ);
+ ifr.ifr_ifrn.ifrn_name[IFNAMSIZ - 1] = 0;
+
if(ioctl(device_fd, SIOCGIFINDEX, &ifr)) {
close(device_fd);
- logger(LOG_ERR, "Can't find interface %s: %s", iface,
- strerror(errno));
+ logger(LOG_ERR, "Can't find interface %s: %s", ifr.ifr_ifrn.ifrn_name, strerror(errno));
return false;
}
- memset(&sa, '0', sizeof(sa));
+ memset(&sa, 0, sizeof(sa));
sa.sll_family = AF_PACKET;
sa.sll_protocol = htons(ETH_P_ALL);
sa.sll_ifindex = ifr.ifr_ifindex;
if(bind(device_fd, (struct sockaddr *) &sa, (socklen_t) sizeof(sa))) {
- logger(LOG_ERR, "Could not bind %s to %s: %s", device, iface, strerror(errno));
+ logger(LOG_ERR, "Could not bind %s to %s: %s", device, ifr.ifr_ifrn.ifrn_name, strerror(errno));
return false;
}
if((lenin = read(device_fd, packet->data, MTU)) <= 0) {
logger(LOG_ERR, "Error while reading from %s %s: %s", device_info,
- device, strerror(errno));
+ device, strerror(errno));
return false;
}
device_total_in += packet->len;
ifdebug(TRAFFIC) logger(LOG_DEBUG, "Read packet of %d bytes from %s", packet->len,
- device_info);
+ device_info);
return true;
}
static bool write_packet(vpn_packet_t *packet) {
ifdebug(TRAFFIC) logger(LOG_DEBUG, "Writing packet of %d bytes to %s",
- packet->len, device_info);
+ packet->len, device_info);
if(write(device_fd, packet->data, packet->len) < 0) {
logger(LOG_ERR, "Can't write to %s %s: %s", device_info, device,
- strerror(errno));
+ strerror(errno));
return false;
}
.write = write_packet,
.dump_stats = dump_device_stats,
};
+
+#else
+
+static bool not_supported(void) {
+ logger(LOG_ERR, "Raw socket device not supported on this platform");
+ return false;
+}
+
+const devops_t raw_socket_devops = {
+ .setup = not_supported,
+ .close = NULL,
+ .read = NULL,
+ .write = NULL,
+ .dump_stats = NULL,
+};
+#endif