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/*
Copyright (c) 2006, 2007 Dmitry Butskoy
<dmitry@butskoy.name>
License: GPL v2 or any later
See COPYING for the status of this software.
*/
#include <stdlib.h>
#include <unistd.h>
#include <sys/socket.h>
#include <poll.h>
#include <netinet/icmp6.h>
#include <netinet/ip_icmp.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netdb.h>
#include "traceroute.h"
static sockaddr_any dest_addr = {{ 0, }, };
static int protocol = DEF_RAW_PROT;
static char *data = NULL;
static size_t *length_p;
static int raw_sk = -1;
static int last_ttl = 0;
static int seq = 0;
static int set_protocol (CLIF_option *optn, char *arg) {
char *q;
protocol = strtoul (arg, &q, 0);
if (q == arg) {
struct protoent *p = getprotobyname (arg);
if (!p) return -1;
protocol = p->p_proto;
}
return 0;
}
static CLIF_option raw_options[] = {
{ 0, "protocol", "PROT", "Use protocol %s (default is "
_TEXT (DEF_RAW_PROT) ")",
set_protocol, 0, 0, CLIF_ABBREV },
CLIF_END_OPTION
};
static int raw_init (const sockaddr_any *dest,
unsigned int port_seq, size_t *packet_len_p) {
int i;
int af = dest->sa.sa_family;
dest_addr = *dest;
dest_addr.sin.sin_port = 0;
if (port_seq) protocol = port_seq;
length_p = packet_len_p;
if (*length_p &&
!(data = malloc (*length_p))
) error ("malloc");
for (i = 0; i < *length_p; i++)
data[i] = 0x40 + (i & 0x3f);
raw_sk = socket (af, SOCK_RAW, protocol);
if (raw_sk < 0)
error_or_perm ("socket");
tune_socket (raw_sk);
/* Don't want to catch packets from another hosts */
if (raw_can_connect () &&
connect (raw_sk, &dest_addr.sa, sizeof (dest_addr)) < 0
) error ("connect");
use_recverr (raw_sk);
add_poll (raw_sk, POLLIN | POLLERR);
return 0;
}
static void raw_send_probe (probe *pb, int ttl) {
if (ttl != last_ttl) {
set_ttl (raw_sk, ttl);
last_ttl = ttl;
}
pb->send_time = get_time ();
if (do_send (raw_sk, data, *length_p, &dest_addr) < 0) {
pb->send_time = 0;
return;
}
pb->seq = ++seq;
return;
}
static probe *raw_check_reply (int sk, int err, sockaddr_any *from,
char *buf, size_t len) {
probe *pb;
if (!equal_addr (&dest_addr, from))
return NULL;
pb = probe_by_seq (seq);
if (!pb) return NULL;
if (!err) pb->final = 1;
return pb;
}
static void raw_recv_probe (int sk, int revents) {
if (!(revents & (POLLIN | POLLERR)))
return;
recv_reply (sk, !!(revents & POLLERR), raw_check_reply);
}
static void raw_expire_probe (probe *pb) {
probe_done (pb);
}
static tr_module raw_ops = {
.name = "raw",
.init = raw_init,
.send_probe = raw_send_probe,
.recv_probe = raw_recv_probe,
.expire_probe = raw_expire_probe,
.options = raw_options,
.one_per_time = 1,
};
TR_MODULE (raw_ops);
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