/*
device.c -- raw socket
Copyright (C) 2002-2005 Ivo Timmermans,
- 2002-2011 Guus Sliepen <guus@tinc-vpn.org>
+ 2002-2012 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"
+#if defined(PF_PACKET) && defined(ETH_P_ALL) && defined(AF_PACKET) && defined(SIOCGIFINDEX)
static char *device_info;
-static uint64_t device_total_in = 0;
-static uint64_t device_total_out = 0;
-
static bool setup_device(void) {
struct ifreq ifr;
struct sockaddr_ll sa;
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,
+ logger(DEBUG_ALWAYS, LOG_ERR, "Could not open %s: %s", device_info,
strerror(errno));
return false;
}
- memset(&ifr, 0, sizeof(ifr));
+ memset(&ifr, 0, sizeof ifr);
+
+#ifdef FD_CLOEXEC
+ fcntl(device_fd, F_SETFD, FD_CLOEXEC);
+#endif
+
strncpy(ifr.ifr_ifrn.ifrn_name, iface, IFNAMSIZ);
if(ioctl(device_fd, SIOCGIFINDEX, &ifr)) {
close(device_fd);
- logger(LOG_ERR, "Can't find interface %s: %s", iface,
+ logger(DEBUG_ALWAYS, LOG_ERR, "Can't find interface %s: %s", iface,
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));
+ if(bind(device_fd, (struct sockaddr *) &sa, (socklen_t) sizeof sa)) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Could not bind %s to %s: %s", device, iface, strerror(errno));
return false;
}
- logger(LOG_INFO, "%s is a %s", device, device_info);
+ logger(DEBUG_ALWAYS, LOG_INFO, "%s is a %s", device, device_info);
return true;
}
static void close_device(void) {
- close(device_fd);
+ close(device_fd); device_fd = -1;
- free(device);
- free(iface);
+ free(device); device = NULL;
+ free(iface); iface = NULL;
+ device_info = NULL;
}
static bool read_packet(vpn_packet_t *packet) {
- int lenin;
+ int inlen;
- if((lenin = read(device_fd, packet->data, MTU)) <= 0) {
- logger(LOG_ERR, "Error while reading from %s %s: %s", device_info,
+ if((inlen = read(device_fd, DATA(packet), MTU)) <= 0) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Error while reading from %s %s: %s", device_info,
device, strerror(errno));
return false;
}
- packet->len = lenin;
-
- device_total_in += packet->len;
+ packet->len = inlen;
- ifdebug(TRAFFIC) logger(LOG_DEBUG, "Read packet of %d bytes from %s", packet->len,
+ logger(DEBUG_TRAFFIC, LOG_DEBUG, "Read packet of %d bytes from %s", packet->len,
device_info);
return true;
}
static bool write_packet(vpn_packet_t *packet) {
- ifdebug(TRAFFIC) logger(LOG_DEBUG, "Writing packet of %d bytes to %s",
+ logger(DEBUG_TRAFFIC, LOG_DEBUG, "Writing packet of %d bytes to %s",
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,
+ if(write(device_fd, DATA(packet), packet->len) < 0) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Can't write to %s %s: %s", device_info, device,
strerror(errno));
return false;
}
- device_total_out += packet->len;
-
return true;
}
-static void dump_device_stats(void) {
- logger(LOG_DEBUG, "Statistics for %s %s:", device_info, device);
- logger(LOG_DEBUG, " total bytes in: %10"PRIu64, device_total_in);
- logger(LOG_DEBUG, " total bytes out: %10"PRIu64, device_total_out);
-}
-
const devops_t raw_socket_devops = {
.setup = setup_device,
.close = close_device,
.read = read_packet,
.write = write_packet,
- .dump_stats = dump_device_stats,
};
+
+#else
+
+static bool not_supported(void) {
+ logger(DEBUG_ALWAYS, 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,
+};
+#endif