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freebsd-ports/net/tayga/files/patch-freebsd
Sergey Matveychuk 46552c8eb9 TAYGA is an out-of-kernel stateless NAT64 implementation for that uses the 
TUN driver to exchange IPv4 and IPv6 packets with the kernel. It is intended
to provide production-quality NAT64 service for networks where dedicated
NAT64 hardware would be overkill.

WWW: http://www.litech.org/tayga/

Submitted by:   melifaro
Feature safe:   yes
2012-10-17 15:26:41 +00:00

262 lines
6.4 KiB
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diff -ur nat64.c nat64.c
--- nat64.c 2012-10-03 16:55:57.000000000 +0400
+++ nat64.c 2012-10-04 14:22:01.000000000 +0400
@@ -94,8 +94,7 @@
} __attribute__ ((__packed__)) header;
struct iovec iov[2];
- header.pi.flags = 0;
- header.pi.proto = htons(ETH_P_IP);
+ TUN_SET_PROTO(&header.pi, ETH_P_IP);
header.ip4.ver_ihl = 0x45;
header.ip4.tos = tos;
header.ip4.length = htons(sizeof(header.ip4) + sizeof(header.icmp) +
@@ -156,6 +155,7 @@
}
}
+
static void xlate_header_4to6(struct pkt *p, struct ip6 *ip6,
int payload_length)
{
@@ -266,8 +266,7 @@
if (dest)
dest->flags |= CACHE_F_SEEN_4TO6;
- header.pi.flags = 0;
- header.pi.proto = htons(ETH_P_IPV6);
+ TUN_SET_PROTO(&header.pi, ETH_P_IPV6);
if (no_frag_hdr) {
iov[0].iov_base = &header;
@@ -514,8 +513,7 @@
sizeof(header.ip6_em)),
ip_checksum(p_em.data, p_em.data_len)));
- header.pi.flags = 0;
- header.pi.proto = htons(ETH_P_IPV6);
+ TUN_SET_PROTO(&header.pi, ETH_P_IPV6);
iov[0].iov_base = &header;
iov[0].iov_len = sizeof(header);
@@ -566,8 +564,7 @@
} __attribute__ ((__packed__)) header;
struct iovec iov[2];
- header.pi.flags = 0;
- header.pi.proto = htons(ETH_P_IPV6);
+ TUN_SET_PROTO(&header.pi, ETH_P_IPV6);
header.ip6.ver_tc_fl = htonl((0x6 << 28) | (tc << 20));
header.ip6.payload_length = htons(sizeof(header.icmp) + data_len);
header.ip6.next_header = 58;
@@ -588,6 +585,8 @@
if (writev(gcfg->tun_fd, iov, data_len ? 2 : 1) < 0)
slog(LOG_WARNING, "error writing packet to tun device: %s\n",
strerror(errno));
+
+ slog(LOG_WARNING, "Wrote somethinh\n");
}
static void host_send_icmp6_error(uint8_t type, uint8_t code, uint32_t word,
@@ -728,8 +727,7 @@
if (dest)
dest->flags |= CACHE_F_SEEN_6TO4;
- header.pi.flags = 0;
- header.pi.proto = htons(ETH_P_IP);
+ TUN_SET_PROTO(&header.pi, ETH_P_IP);
header.ip4.cksum = ip_checksum(&header.ip4, sizeof(header.ip4));
@@ -932,8 +930,7 @@
sizeof(header.ip4_em)),
ip_checksum(p_em.data, p_em.data_len));
- header.pi.flags = 0;
- header.pi.proto = htons(ETH_P_IP);
+ TUN_SET_PROTO(&header.pi, ETH_P_IP);
iov[0].iov_base = &header;
iov[0].iov_len = sizeof(header);
diff -ur tayga.c tayga.c
--- tayga.c 2012-10-03 16:55:57.000000000 +0400
+++ tayga.c 2012-10-04 15:13:49.000000000 +0400
@@ -84,6 +84,7 @@
}
}
+#ifdef __Linux__
static void tun_setup(int do_mktun, int do_rmtun)
{
struct ifreq ifr;
@@ -161,6 +162,113 @@
slog(LOG_INFO, "Using tun device %s with MTU %d\n", gcfg->tundev,
gcfg->mtu);
}
+#endif
+
+#ifdef __FreeBSD__
+static void tun_setup(int do_mktun, int do_rmtun)
+{
+ struct ifreq ifr;
+ int fd, do_rename = 0, multi_af;
+ char devname[64];
+
+ if (strncmp(gcfg->tundev, "tun", 3))
+ do_rename = 1;
+
+ if ((do_mktun || do_rmtun) && do_rename)
+ {
+ slog(LOG_CRIT,
+ "tunnel interface name needs to match tun[0-9]+ pattern "
+ "for --mktun to work\n");
+ exit(1);
+ }
+
+ snprintf(devname, sizeof(devname), "/dev/%s", do_rename ? "tun" : gcfg->tundev);
+
+ gcfg->tun_fd = open(devname, O_RDWR);
+ if (gcfg->tun_fd < 0) {
+ slog(LOG_CRIT, "Unable to open %s, aborting: %s\n",
+ devname, strerror(errno));
+ exit(1);
+ }
+
+ if (do_mktun) {
+ slog(LOG_NOTICE, "Created persistent tun device %s\n",
+ gcfg->tundev);
+ return;
+ } else if (do_rmtun) {
+
+ /* Close socket before removal */
+ close(gcfg->tun_fd);
+
+ fd = socket(PF_INET, SOCK_DGRAM, 0);
+ if (fd < 0) {
+ slog(LOG_CRIT, "Unable to create control socket, aborting: %s\n",
+ strerror(errno));
+ exit(1);
+ }
+
+ memset(&ifr, 0, sizeof(ifr));
+ strcpy(ifr.ifr_name, gcfg->tundev);
+ if (ioctl(fd, SIOCIFDESTROY, &ifr) < 0) {
+ slog(LOG_CRIT, "Unable to destroy interface %s, aborting: %s\n",
+ gcfg->tundev, strerror(errno));
+ exit(1);
+ }
+
+ close(fd);
+
+ slog(LOG_NOTICE, "Removed persistent tun device %s\n",
+ gcfg->tundev);
+ return;
+ }
+
+ /* Set multi-AF mode */
+ multi_af = 1;
+ if (ioctl(gcfg->tun_fd, TUNSIFHEAD, &multi_af) < 0) {
+ slog(LOG_CRIT, "Unable to set multi-AF on %s, "
+ "aborting: %s\n", gcfg->tundev,
+ strerror(errno));
+ exit(1);
+ }
+
+ slog(LOG_CRIT, "Multi-AF mode set on %s\n", gcfg->tundev);
+
+ set_nonblock(gcfg->tun_fd);
+
+ fd = socket(PF_INET, SOCK_DGRAM, 0);
+ if (fd < 0) {
+ slog(LOG_CRIT, "Unable to create socket, aborting: %s\n",
+ strerror(errno));
+ exit(1);
+ }
+
+ if (do_rename) {
+ memset(&ifr, 0, sizeof(ifr));
+ strcpy(ifr.ifr_name, fdevname(gcfg->tun_fd));
+ ifr.ifr_data = gcfg->tundev;
+ if (ioctl(fd, SIOCSIFNAME, &ifr) < 0) {
+ slog(LOG_CRIT, "Unable to rename interface %s to %s, aborting: %s\n",
+ fdevname(gcfg->tun_fd), gcfg->tundev,
+ strerror(errno));
+ exit(1);
+ }
+ }
+
+ memset(&ifr, 0, sizeof(ifr));
+ strcpy(ifr.ifr_name, gcfg->tundev);
+ if (ioctl(fd, SIOCGIFMTU, &ifr) < 0) {
+ slog(LOG_CRIT, "Unable to query MTU, aborting: %s\n",
+ strerror(errno));
+ exit(1);
+ }
+ close(fd);
+
+ gcfg->mtu = ifr.ifr_mtu;
+
+ slog(LOG_INFO, "Using tun device %s with MTU %d\n", gcfg->tundev,
+ gcfg->mtu);
+}
+#endif
static void signal_handler(int signal)
{
@@ -214,7 +322,7 @@
memset(p, 0, sizeof(struct pkt));
p->data = gcfg->recv_buf + sizeof(struct tun_pi);
p->data_len = ret - sizeof(struct tun_pi);
- switch (ntohs(pi->proto)) {
+ switch (TUN_GET_PROTO(pi)) {
case ETH_P_IP:
handle_ip4(p);
break;
diff -ur tayga.h tayga.h
--- tayga.h 2012-10-03 16:55:57.000000000 +0400
+++ tayga.h 2012-10-04 14:26:09.000000000 +0400
@@ -31,14 +31,44 @@
#include <syslog.h>
#include <errno.h>
#include <time.h>
+#ifdef __Linux__
#include <linux/if.h>
#include <linux/if_tun.h>
#include <linux/if_ether.h>
+#endif
+#ifdef __FreeBSD__
+#include <net/if.h>
+#include <net/if_tun.h>
+#include <netinet/if_ether.h>
+#include <net/ethernet.h>
+#include <sys/uio.h>
+#endif
+
#include "list.h"
#include "config.h"
+#ifdef __Linux__
+#define TUN_SET_PROTO(_pi, _af) { (_pi)->flags = 0; (_pi)->proto = htons(_af); }
+#define TUN_GET_PROTO(_pi) ntohs((_pi)->proto)
+#endif
+
+#ifdef __FreeBSD__
+#define s6_addr8 __u6_addr.__u6_addr8
+#define s6_addr16 __u6_addr.__u6_addr16
+#define s6_addr32 __u6_addr.__u6_addr32
+
+struct tun_pi {
+ int proto;
+};
+
+#define ETH_P_IP AF_INET
+#define ETH_P_IPV6 AF_INET6
+#define TUN_SET_PROTO(_pi, _af) { (_pi)->proto = htonl(_af); }
+#define TUN_GET_PROTO(_pi) ntohl((_pi)->proto)
+#endif
+
/* Configuration knobs */
/* Number of seconds of silence before a map ages out of the cache */
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