* Tue Dec 20 03:50:13 PST 1988
*/
+//usage:#define traceroute_trivial_usage
+//usage: "[-"IF_TRACEROUTE6("46")"FIldnrv] [-f 1ST_TTL] [-m MAXTTL] [-p PORT] [-q PROBES]\n"
+//usage: " [-s SRC_IP] [-t TOS] [-w WAIT_SEC] [-g GATEWAY] [-i IFACE]\n"
+//usage: " [-z PAUSE_MSEC] HOST [BYTES]"
+//usage:#define traceroute_full_usage "\n\n"
+//usage: "Trace the route to HOST\n"
+//usage: IF_TRACEROUTE6(
+//usage: "\n -4,-6 Force IP or IPv6 name resolution"
+//usage: )
+//usage: "\n -F Set the don't fragment bit"
+//usage: "\n -I Use ICMP ECHO instead of UDP datagrams"
+//usage: "\n -l Display the TTL value of the returned packet"
+//usage: "\n -d Set SO_DEBUG options to socket"
+//usage: "\n -n Print numeric addresses"
+//usage: "\n -r Bypass routing tables, send directly to HOST"
+//usage: "\n -v Verbose"
+//usage: "\n -m Max time-to-live (max number of hops)"
+//usage: "\n -p Base UDP port number used in probes"
+//usage: "\n (default 33434)"
+//usage: "\n -q Number of probes per TTL (default 3)"
+//usage: "\n -s IP address to use as the source address"
+//usage: "\n -t Type-of-service in probe packets (default 0)"
+//usage: "\n -w Time in seconds to wait for a response (default 3)"
+//usage: "\n -g Loose source route gateway (8 max)"
+//usage:
+//usage:#define traceroute6_trivial_usage
+//usage: "[-dnrv] [-m MAXTTL] [-p PORT] [-q PROBES]\n"
+//usage: " [-s SRC_IP] [-t TOS] [-w WAIT_SEC] [-i IFACE]\n"
+//usage: " HOST [BYTES]"
+//usage:#define traceroute6_full_usage "\n\n"
+//usage: "Trace the route to HOST\n"
+//usage: "\n -d Set SO_DEBUG options to socket"
+//usage: "\n -n Print numeric addresses"
+//usage: "\n -r Bypass routing tables, send directly to HOST"
+//usage: "\n -v Verbose"
+//usage: "\n -m Max time-to-live (max number of hops)"
+//usage: "\n -p Base UDP port number used in probes"
+//usage: "\n (default is 33434)"
+//usage: "\n -q Number of probes per TTL (default 3)"
+//usage: "\n -s IP address to use as the source address"
+//usage: "\n -t Type-of-service in probe packets (default 0)"
+//usage: "\n -w Time in seconds to wait for a response (default 3)"
+
#define TRACEROUTE_SO_DEBUG 0
/* TODO: undefs were uncommented - ??! we have config system for that! */
static int
-wait_for_reply(len_and_sockaddr *from_lsa, struct sockaddr *to)
+wait_for_reply(len_and_sockaddr *from_lsa, struct sockaddr *to, unsigned *timestamp_us, int *left_ms)
{
struct pollfd pfd[1];
int read_len = 0;
pfd[0].fd = rcvsock;
pfd[0].events = POLLIN;
- if (safe_poll(pfd, 1, waittime * 1000) > 0) {
+ if (*left_ms >= 0 && safe_poll(pfd, 1, *left_ms) > 0) {
+ unsigned t;
+
read_len = recv_from_to(rcvsock,
recv_pkt, sizeof(recv_pkt),
- /*flags:*/ 0,
+ /*flags:*/ MSG_DONTWAIT,
&from_lsa->u.sa, to, from_lsa->len);
+ t = monotonic_us();
+ *left_ms -= (t - *timestamp_us) / 1000;
+ *timestamp_us = t;
}
return read_len;
if (!(option_mask32 & OPT_USE_ICMP)) {
out = outdata;
len -= sizeof(*outudp);
- set_nport(dest_lsa, htons(port + seq));
+ set_nport(&dest_lsa->u.sa, htons(port + seq));
}
}
return (type == ICMP6_TIME_EXCEEDED ? -1 : (code<<8)+1);
}
}
-
}
# if ENABLE_FEATURE_TRACEROUTE_VERBOSE
type, pr_type(type), icp->icmp6_code);
read_len -= sizeof(struct icmp6_hdr);
- for (i = 0; i < read_len ; i++) {
+ for (i = 0; i < read_len; i++) {
if (i % 16 == 0)
printf("%04x:", i);
if (i % 4 == 0)
} else
#endif
{
- read_len -= ((struct ip*)recv_pkt)->ip_hl << 2;
+ struct ip *ip4packet = (struct ip*)recv_pkt;
+ read_len -= ip4packet->ip_hl << 2;
}
printf(" %d bytes to %s", read_len, ina);
free(ina);
static int
common_traceroute_main(int op, char **argv)
{
- int i;
int minpacket;
int tos = 0;
int max_ttl = 30;
#if ENABLE_FEATURE_TRACEROUTE_SOURCE_ROUTE && defined IP_OPTIONS
if (lsrr > 0) {
unsigned char optlist[MAX_IPOPTLEN];
+ unsigned size;
/* final hop */
gwlist[lsrr] = dest_lsa->u.sin.sin_addr.s_addr;
optlist[0] = IPOPT_NOP;
/* loose source route option */
optlist[1] = IPOPT_LSRR;
- i = lsrr * sizeof(gwlist[0]);
- optlist[2] = i + 3;
+ size = lsrr * sizeof(gwlist[0]);
+ optlist[2] = size + 3;
/* pointer to LSRR addresses */
optlist[3] = IPOPT_MINOFF;
- memcpy(optlist + 4, gwlist, i);
+ memcpy(optlist + 4, gwlist, size);
if (setsockopt(sndsock, IPPROTO_IP, IP_OPTIONS,
- (char *)optlist, i + sizeof(gwlist[0])) < 0) {
+ (char *)optlist, size + sizeof(gwlist[0])) < 0) {
bb_perror_msg_and_die("IP_OPTIONS");
}
}
int probe_fd = xsocket(af, SOCK_DGRAM, 0);
if (op & OPT_DEVICE)
setsockopt_bindtodevice(probe_fd, device);
- set_nport(dest_lsa, htons(1025));
+ set_nport(&dest_lsa->u.sa, htons(1025));
/* dummy connect. makes kernel pick source IP (and port) */
xconnect(probe_fd, &dest_lsa->u.sa, dest_lsa->len);
- set_nport(dest_lsa, htons(port));
+ set_nport(&dest_lsa->u.sa, htons(port));
/* read IP and port */
source_lsa = get_sock_lsa(probe_fd);
close(probe_fd);
/* bind our sockets to this IP (but not port) */
- set_nport(source_lsa, 0);
+ set_nport(&source_lsa->u.sa, 0);
xbind(sndsock, &source_lsa->u.sa, source_lsa->len);
xbind(rcvsock, &source_lsa->u.sa, source_lsa->len);
int unreachable = 0; /* counter */
int gotlastaddr = 0; /* flags */
int got_there = 0;
- int first = 1;
printf("%2d", ttl);
for (probe = 0; probe < nprobes; ++probe) {
int read_len;
unsigned t1;
unsigned t2;
+ int left_ms;
struct ip *ip;
- if (!first && pausemsecs > 0)
- usleep(pausemsecs * 1000);
fflush_all();
+ if (probe != 0 && pausemsecs > 0)
+ usleep(pausemsecs * 1000);
- t1 = monotonic_us();
send_probe(++seq, ttl);
+ t2 = t1 = monotonic_us();
+
+ left_ms = waittime * 1000;
+ while ((read_len = wait_for_reply(from_lsa, to, &t2, &left_ms)) != 0) {
+ int icmp_code;
- first = 0;
- while ((read_len = wait_for_reply(from_lsa, to)) != 0) {
- t2 = monotonic_us();
- i = packet_ok(read_len, from_lsa, to, seq);
+ /* Recv'ed a packet, or read error */
+ /* t2 = monotonic_us() - set by wait_for_reply */
+
+ if (read_len < 0)
+ continue;
+ icmp_code = packet_ok(read_len, from_lsa, to, seq);
/* Skip short packet */
- if (i == 0)
+ if (icmp_code == 0)
continue;
if (!gotlastaddr
printf(" (%d)", ip->ip_ttl);
/* time exceeded in transit */
- if (i == -1)
+ if (icmp_code == -1)
break;
- i--;
- switch (i) {
+ icmp_code--;
+ switch (icmp_code) {
#if ENABLE_TRACEROUTE6
case ICMP6_DST_UNREACH_NOPORT << 8:
got_there = 1;
++unreachable;
break;
default:
- printf(" !<%d>", i);
+ printf(" !<%d>", icmp_code);
++unreachable;
break;
}
break;
- }
+ } /* while (wait and read a packet) */
+
/* there was no packet at all? */
if (read_len == 0)
printf(" *");
- }
+ } /* for (nprobes) */
+
bb_putchar('\n');
if (got_there
|| (unreachable > 0 && unreachable >= nprobes - 1)
projects / oweals / busybox.git / blobdiff