traceroute: cleanup preparing it for traceroute6. -17 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
parent
11f3a8b7ed
commit
0d56568654
@ -211,6 +211,13 @@
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#include <netinet/udp.h>
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#include <netinet/ip.h>
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#include <netinet/ip_icmp.h>
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#if ENABLE_FEATURE_IPV6
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# include <netinet/ip6.h>
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# include <netinet/icmp6.h>
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# ifndef SOL_IPV6
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# define SOL_IPV6 IPPROTO_IPV6
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# endif
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#endif
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#include "libbb.h"
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#include "inet_common.h"
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@ -222,7 +229,9 @@
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# define IPPROTO_IP 0
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#endif
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/* Keep in sync with getopt32 call! */
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#define OPT_STRING "FIlnrdvxt:i:m:p:q:s:w:z:f:" \
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IF_FEATURE_TRACEROUTE_SOURCE_ROUTE("g:")
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enum {
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OPT_DONT_FRAGMNT = (1 << 0), /* F */
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OPT_USE_ICMP = (1 << 1) * ENABLE_FEATURE_TRACEROUTE_USE_ICMP, /* I */
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@ -309,15 +318,15 @@ static int
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wait_for_reply(struct sockaddr_in *fromp)
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{
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struct pollfd pfd[1];
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int cc = 0;
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int read_len = 0;
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socklen_t fromlen = sizeof(*fromp);
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pfd[0].fd = rcvsock;
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pfd[0].events = POLLIN;
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if (safe_poll(pfd, 1, waittime * 1000) > 0)
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cc = recvfrom(rcvsock, recv_pkt, sizeof(recv_pkt), 0,
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read_len = recvfrom(rcvsock, recv_pkt, sizeof(recv_pkt), 0,
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(struct sockaddr *)fromp, &fromlen);
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return cc;
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return read_len;
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}
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/*
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@ -417,8 +426,7 @@ send_probe(int seq, int ttl)
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len -= sizeof(*outudp);
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set_nport(dest_lsa, htons(port + seq));
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}
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res = xsendto(sndsock, out, len,
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(struct sockaddr *)&dest_lsa->u.sa, dest_lsa->len);
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res = xsendto(sndsock, out, len, &dest_lsa->u.sa, dest_lsa->len);
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if (res != len) {
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bb_info_msg("sent %d octets, ret=%d", len, res);
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}
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@ -447,11 +455,11 @@ pr_type(unsigned char t)
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#endif
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#if !ENABLE_FEATURE_TRACEROUTE_VERBOSE
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#define packet_ok(cc, from, seq) \
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packet_ok(cc, seq)
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#define packet_ok(read_len, from, seq) \
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packet_ok(read_len, seq)
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#endif
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static int
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packet_ok(int cc, const struct sockaddr_in *from, int seq)
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packet_ok(int read_len, const struct sockaddr_in *from, int seq)
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{
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const struct icmp *icp;
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unsigned char type, code;
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@ -460,15 +468,15 @@ packet_ok(int cc, const struct sockaddr_in *from, int seq)
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ip = (struct ip *) recv_pkt;
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hlen = ip->ip_hl << 2;
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if (cc < hlen + ICMP_MINLEN) {
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if (read_len < hlen + ICMP_MINLEN) {
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#if ENABLE_FEATURE_TRACEROUTE_VERBOSE
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if (verbose)
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printf("packet too short (%d bytes) from %s\n", cc,
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printf("packet too short (%d bytes) from %s\n", read_len,
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inet_ntoa(from->sin_addr));
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#endif
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return 0;
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}
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cc -= hlen;
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read_len -= hlen;
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icp = (struct icmp *)(recv_pkt + hlen);
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type = icp->icmp_type;
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code = icp->icmp_code;
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@ -498,7 +506,7 @@ packet_ok(int cc, const struct sockaddr_in *from, int seq)
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}
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hicmp = (struct icmp *)((unsigned char *)hip + hlen);
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if (hlen + SIZEOF_ICMP_HDR <= cc
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if (hlen + SIZEOF_ICMP_HDR <= read_len
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&& hip->ip_p == IPPROTO_ICMP
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&& hicmp->icmp_id == htons(ident)
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&& hicmp->icmp_seq == htons(seq)
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@ -507,7 +515,7 @@ packet_ok(int cc, const struct sockaddr_in *from, int seq)
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}
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} else {
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up = (struct udphdr *)((char *)hip + hlen);
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if (hlen + 12 <= cc
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if (hlen + 12 <= read_len
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&& hip->ip_p == IPPROTO_UDP
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// Off: since we do not form the entire IP packet,
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// but defer it to kernel, we can't set source port,
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@ -526,10 +534,10 @@ packet_ok(int cc, const struct sockaddr_in *from, int seq)
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printf("\n%d bytes from %s to "
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"%s: icmp type %d (%s) code %d\n",
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cc, inet_ntoa(from->sin_addr),
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read_len, inet_ntoa(from->sin_addr),
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inet_ntoa(ip->ip_dst),
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type, pr_type(type), icp->icmp_code);
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for (i = 4; i < cc; i += sizeof(*lp))
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for (i = 4; i < read_len; i += sizeof(*lp))
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printf("%2d: x%8.8x\n", i, *lp++);
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}
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#endif
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@ -542,34 +550,39 @@ packet_ok(int cc, const struct sockaddr_in *from, int seq)
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* numeric value, otherwise try for symbolic name.
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*/
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static void
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print_inetname(const struct sockaddr_in *from)
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print_inetname(const struct sockaddr *from)
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{
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const char *ina;
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char *ina = xmalloc_sockaddr2dotted_noport(from);
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ina = inet_ntoa(from->sin_addr);
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if (option_mask32 & OPT_ADDR_NUM)
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if (option_mask32 & OPT_ADDR_NUM) {
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printf(" %s", ina);
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else {
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} else {
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char *n = NULL;
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if (from->sin_addr.s_addr != INADDR_ANY)
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if (from->sa_family != AF_INET
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|| ((struct sockaddr_in*)from)->sin_addr.s_addr != INADDR_ANY
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) {
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/* Try to reverse resolve if it is not 0.0.0.0 */
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n = xmalloc_sockaddr2host_noport((struct sockaddr*)from);
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}
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printf(" %s (%s)", (n ? n : ina), ina);
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free(n);
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}
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free(ina);
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}
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static void
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print(int cc, const struct sockaddr_in *from)
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print(int read_len, const struct sockaddr_in *from)
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{
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print_inetname(from);
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print_inetname((const struct sockaddr*)from);
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if (verbose) {
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const struct ip *ip;
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int hlen;
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ip = (struct ip *) recv_pkt;
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hlen = ip->ip_hl << 2;
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cc -= hlen;
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printf(" %d bytes to %s", cc, inet_ntoa(ip->ip_dst));
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read_len -= hlen;
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printf(" %d bytes to %s", read_len, inet_ntoa(ip->ip_dst));
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}
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}
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@ -581,17 +594,16 @@ print_delta_ms(unsigned t1p, unsigned t2p)
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}
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/*
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Usage: [-dFIlnrvx] [-g gateway] [-i iface] [-f first_ttl]
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[-m max_ttl] [ -p port] [-q nqueries] [-s src_addr] [-t tos]
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[-w waittime] [-z pausemsecs] host [packetlen]"
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*/
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* Usage: [-dFIlnrvx] [-g gateway] [-i iface] [-f first_ttl]
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* [-m max_ttl] [ -p port] [-q nqueries] [-s src_addr] [-t tos]
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* [-w waittime] [-z pausemsecs] host [packetlen]"
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*/
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int traceroute_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int traceroute_main(int argc, char **argv)
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int traceroute_main(int argc UNUSED_PARAM, char **argv)
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{
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int i;
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int minpacket;
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int ttl, i;
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int seq = 0;
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int tos = 0;
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int max_ttl = 30;
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int nprobes = 3;
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@ -611,19 +623,14 @@ int traceroute_main(int argc, char **argv)
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llist_t *source_route_list = NULL;
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int lsrr = 0;
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#endif
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int ttl;
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int seq;
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INIT_G();
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#if ENABLE_FEATURE_TRACEROUTE_SOURCE_ROUTE
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opt_complementary = "x-x:g::";
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#else
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opt_complementary = "x-x";
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#endif
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op = getopt32(argv, "FIlnrdvxt:i:m:p:q:s:w:z:f:"
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#if ENABLE_FEATURE_TRACEROUTE_SOURCE_ROUTE
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"g:"
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#endif
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/* minimum 1 arg */
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opt_complementary = "-1:x-x" IF_FEATURE_TRACEROUTE_SOURCE_ROUTE(":g::");
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op = getopt32(argv, OPT_STRING
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, &tos_str, &device, &max_ttl_str, &port_str, &nprobes_str
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, &source, &waittime_str, &pausemsecs_str, &first_ttl_str
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#if ENABLE_FEATURE_TRACEROUTE_SOURCE_ROUTE
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@ -681,17 +688,9 @@ int traceroute_main(int argc, char **argv)
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/* Process destination and optional packet size */
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argv += optind;
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argc -= optind;
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switch (argc) {
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case 2:
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if (argv[1])
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packlen = xatoul_range(argv[1], minpacket, 32 * 1024);
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/* Fall through */
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case 1:
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dest_lsa = xhost2sockaddr(argv[0], port);
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break;
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default:
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bb_show_usage();
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}
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dest_lsa = xhost2sockaddr(argv[0], port);
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/* Ensure the socket fds won't be 0, 1 or 2 */
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bb_sanitize_stdio();
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@ -710,8 +709,7 @@ int traceroute_main(int argc, char **argv)
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xmove_fd(xsocket(AF_INET, SOCK_RAW, IPPROTO_ICMP), sndsock);
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else
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xmove_fd(xsocket(AF_INET, SOCK_DGRAM, 0), sndsock);
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#if ENABLE_FEATURE_TRACEROUTE_SOURCE_ROUTE
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#if defined(IP_OPTIONS)
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#if ENABLE_FEATURE_TRACEROUTE_SOURCE_ROUTE && defined IP_OPTIONS
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if (lsrr > 0) {
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unsigned char optlist[MAX_IPOPTLEN];
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@ -734,8 +732,7 @@ int traceroute_main(int argc, char **argv)
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bb_perror_msg_and_die("IP_OPTIONS");
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}
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}
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#endif /* IP_OPTIONS */
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#endif /* CONFIG_FEATURE_TRACEROUTE_SOURCE_ROUTE */
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#endif
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#ifdef SO_SNDBUF
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if (setsockopt(sndsock, SOL_SOCKET, SO_SNDBUF, &packlen, sizeof(packlen)) < 0) {
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bb_perror_msg_and_die("SO_SNDBUF");
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@ -796,6 +793,7 @@ int traceroute_main(int argc, char **argv)
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printf(" from %s", source);
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printf(", %d hops max, %d byte packets\n", max_ttl, packlen);
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seq = 0;
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for (ttl = first_ttl; ttl <= max_ttl; ++ttl) {
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//TODO: make it protocol agnostic (get rid of sockaddr_in)
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struct sockaddr_in from;
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@ -808,7 +806,7 @@ int traceroute_main(int argc, char **argv)
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printf("%2d", ttl);
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for (probe = 0; probe < nprobes; ++probe) {
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int cc;
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int read_len;
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unsigned t1;
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unsigned t2;
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struct ip *ip;
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@ -819,18 +817,18 @@ int traceroute_main(int argc, char **argv)
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t1 = monotonic_us();
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send_probe(++seq, ttl);
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first = 0;
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while ((cc = wait_for_reply(&from)) != 0) {
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first = 0;
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while ((read_len = wait_for_reply(&from)) != 0) {
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t2 = monotonic_us();
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i = packet_ok(cc, &from, seq);
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i = packet_ok(read_len, &from, seq);
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/* Skip short packet */
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if (i == 0)
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continue;
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if (!gotlastaddr
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|| from.sin_addr.s_addr != lastaddr
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) {
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print(cc, &from);
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print(read_len, &from);
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lastaddr = from.sin_addr.s_addr;
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gotlastaddr = 1;
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}
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@ -912,7 +910,8 @@ int traceroute_main(int argc, char **argv)
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}
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break;
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}
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if (cc == 0)
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/* there was no packet at all? */
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if (read_len == 0)
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printf(" *");
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}
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bb_putchar('\n');
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@ -922,5 +921,6 @@ int traceroute_main(int argc, char **argv)
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break;
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}
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}
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return 0;
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}
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