traceroute: code shrink
Do not byteswap ident (why we were doing it?) function old new delta common_traceroute_main 3544 3426 -118 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
parent
3978adc445
commit
d0dea17900
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@ -475,7 +475,7 @@ send_probe(int seq, int ttl)
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#if ENABLE_TRACEROUTE6
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if (dest_lsa->u.sa.sa_family == AF_INET6) {
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struct outdata6_t *pkt = (void *) outdata;
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pkt->ident6 = htonl(ident);
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pkt->ident6 = ident;
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pkt->seq6 = htonl(seq);
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/*gettimeofday(&pkt->tv, &tz);*/
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icp = outicmp6;
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@ -631,7 +631,7 @@ packet4_ok(int read_len, const struct sockaddr_in *from, int seq)
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if ((option_mask32 & OPT_USE_ICMP)
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&& type == ICMP_ECHOREPLY
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&& icp->icmp_id == htons(ident)
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&& icp->icmp_id == ident
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&& icp->icmp_seq == htons(seq)
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) {
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/* In UDP mode, when we reach the machine, we (usually)
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@ -655,7 +655,7 @@ packet4_ok(int read_len, const struct sockaddr_in *from, int seq)
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hicmp = (struct icmp *)((unsigned char *)hip + hlen);
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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_id == ident
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&& hicmp->icmp_seq == htons(seq)
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) {
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return (type == ICMP_TIMXCEED ? -1 : code + 1);
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@ -667,7 +667,7 @@ packet4_ok(int read_len, const struct sockaddr_in *from, int seq)
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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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// and thus can't check it here in the reply
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/* && up->source == htons(ident) */
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/* && up->source == ident */
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&& up->dest == htons(port + seq)
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) {
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return (type == ICMP_TIMXCEED ? -1 : code + 1);
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@ -679,10 +679,10 @@ packet4_ok(int read_len, const struct sockaddr_in *from, int seq)
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int i;
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uint32_t *lp = (uint32_t *)&icp->icmp_ip;
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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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read_len, inet_ntoa(from->sin_addr),
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//BUG: inet_ntoa() returns static buf! x2 is NONO!
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printf("\n%d bytes from %s",
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read_len, inet_ntoa(from->sin_addr));
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/* Two separate printf() because inet_ntoa() returns static string */
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printf(" to %s: icmp type %d (%s) code %d\n",
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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 < read_len; i += sizeof(*lp))
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@ -693,21 +693,19 @@ packet4_ok(int read_len, const struct sockaddr_in *from, int seq)
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}
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#if ENABLE_TRACEROUTE6
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# if !ENABLE_FEATURE_TRACEROUTE_VERBOSE
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#define packet_ok(read_len, from_lsa, to, seq) \
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packet_ok(read_len, from_lsa, seq)
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#define packet6_ok(read_len, from_lsa, to, seq) \
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packet6_ok(read_len, from_lsa, seq)
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# endif
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static int
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packet_ok(int read_len, len_and_sockaddr *from_lsa,
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packet6_ok(int read_len, const struct sockaddr_in6 *from,
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struct sockaddr *to,
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int seq)
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{
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const struct icmp6_hdr *icp;
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unsigned char type, code;
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if (from_lsa->u.sa.sa_family == AF_INET)
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return packet4_ok(read_len, &from_lsa->u.sin, seq);
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/* NB: reads from (AF_INET6, SOCK_RAW, IPPROTO_ICMPV6) socket
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* return only ICMP packet (IOW: they strip IPv6 header).
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* This differs from (AF_INET, SOCK_RAW, IPPROTO_ICMP) sockets!?
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@ -719,7 +717,7 @@ packet_ok(int read_len, len_and_sockaddr *from_lsa,
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if ((option_mask32 & OPT_USE_ICMP)
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&& type == ICMP6_ECHO_REPLY
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&& icp->icmp6_id == htons(ident)
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&& icp->icmp6_id == ident
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&& icp->icmp6_seq == htons(seq)
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) {
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/* In UDP mode, when we reach the machine, we (usually)
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@ -749,7 +747,7 @@ packet_ok(int read_len, len_and_sockaddr *from_lsa,
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pkt = (struct outdata6_t *) (up + 1);
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if (ntohl(pkt->ident6) == ident
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if (pkt->ident6 == ident
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&& ntohl(pkt->seq6) == seq
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) {
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return (type == ICMP6_TIME_EXCEEDED ? -1 : (code<<8)+1);
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@ -763,17 +761,17 @@ packet_ok(int read_len, len_and_sockaddr *from_lsa,
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# define MAXHOSTNAMELEN 80
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# endif
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unsigned char *p;
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char pa1[MAXHOSTNAMELEN];
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char pa2[MAXHOSTNAMELEN];
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char pa[MAXHOSTNAMELEN];
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int i;
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p = (unsigned char *) (icp + 1);
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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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printf("\n%d bytes from %s",
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read_len,
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inet_ntop(AF_INET6, &from_lsa->u.sin6.sin6_addr, pa1, sizeof(pa1)),
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inet_ntop(AF_INET6, &((struct sockaddr_in6*)to)->sin6_addr, pa2, sizeof(pa2)),
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inet_ntop(AF_INET6, &from->sin6_addr, pa, sizeof(pa)));
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/* Two printf() instead of one - reuse string constants */
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printf(" to %s: icmp type %d (%s) code %d\n",
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inet_ntop(AF_INET6, &((struct sockaddr_in6*)to)->sin6_addr, pa, sizeof(pa)),
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type, pr_type(type), icp->icmp6_code);
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read_len -= sizeof(struct icmp6_hdr);
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@ -792,7 +790,22 @@ packet_ok(int read_len, len_and_sockaddr *from_lsa,
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return 0;
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}
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# if !ENABLE_FEATURE_TRACEROUTE_VERBOSE
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#define packet_ok(read_len, from_lsa, to, seq) \
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packet_ok(read_len, from_lsa, seq)
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# endif
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static int
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packet_ok(int read_len, len_and_sockaddr *from_lsa,
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struct sockaddr *to,
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int seq)
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{
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if (from_lsa->u.sa.sa_family == AF_INET)
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return packet4_ok(read_len, &from_lsa->u.sin, seq);
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return packet6_ok(read_len, &from_lsa->u.sin6, to, seq);
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}
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#else /* !ENABLE_TRACEROUTE6 */
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static ALWAYS_INLINE int
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packet_ok(int read_len,
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len_and_sockaddr *from_lsa IF_NOT_FEATURE_TRACEROUTE_VERBOSE(UNUSED_PARAM),
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@ -801,6 +814,7 @@ packet_ok(int read_len,
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{
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return packet4_ok(read_len, &from_lsa->u.sin, seq);
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}
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#endif
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/*
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@ -927,14 +941,6 @@ common_traceroute_main(int op, char **argv)
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port = xatou16(port_str);
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if (op & OPT_NPROBES)
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nprobes = xatou_range(nprobes_str, 1, INT_MAX);
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if (op & OPT_SOURCE) {
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/*
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* set the ip source address of the outbound
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* probe (e.g., on a multi-homed host).
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*/
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if (getuid() != 0)
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bb_simple_error_msg_and_die(bb_msg_you_must_be_root);
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}
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if (op & OPT_WAITTIME)
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waittime = xatou_range(waittime_str, 1, 24 * 60 * 60);
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if (op & OPT_PAUSE_MS)
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@ -993,23 +999,26 @@ common_traceroute_main(int op, char **argv)
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if (op & OPT_BYPASS_ROUTE)
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setsockopt_SOL_SOCKET_1(rcvsock, SO_DONTROUTE);
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#if ENABLE_TRACEROUTE6
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if (af == AF_INET6) {
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if (setsockopt_int(rcvsock, SOL_RAW, IPV6_CHECKSUM, 2) != 0)
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bb_perror_msg_and_die("setsockopt(%s)", "IPV6_CHECKSUM");
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if (op & OPT_USE_ICMP)
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xmove_fd(xsocket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6), sndsock);
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else
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xmove_fd(xsocket(AF_INET6, SOCK_DGRAM, 0), sndsock);
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} else
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#endif
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{
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if (op & OPT_USE_ICMP)
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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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int snd;
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#if ENABLE_TRACEROUTE6
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if (af == AF_INET6) {
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if (setsockopt_int(rcvsock, SOL_RAW, IPV6_CHECKSUM, 2) != 0)
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bb_perror_msg_and_die("setsockopt(%s)", "IPV6_CHECKSUM");
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if (op & OPT_USE_ICMP)
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snd = xsocket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6);
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else
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snd = xsocket(AF_INET6, SOCK_DGRAM, 0);
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} else
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#endif
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{
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if (op & OPT_USE_ICMP)
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snd = xsocket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
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else
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snd = xsocket(AF_INET, SOCK_DGRAM, 0);
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}
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xmove_fd(snd, sndsock);
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}
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//TODO xmove_fd to here!
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#ifdef SO_SNDBUF
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if (setsockopt_SOL_SOCKET_int(sndsock, SO_SNDBUF, packlen) != 0) {
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@ -1036,13 +1045,12 @@ common_traceroute_main(int op, char **argv)
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ident = getpid();
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outdata = (void*)(outudp + 1);
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if (!ENABLE_TRACEROUTE6 || af == AF_INET) {
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outdata = (void*)(outudp + 1);
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if (op & OPT_USE_ICMP) {
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ident |= 0x8000;
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outicmp->icmp_type = ICMP_ECHO;
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/*outicmp->icmp_code = 0; - set by xzalloc */
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outicmp->icmp_id = htons(ident);
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outicmp->icmp_id = ident;
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outdata = (void*)((char *)outicmp + SIZEOF_ICMP_HDR);
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}
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}
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@ -1050,10 +1058,9 @@ common_traceroute_main(int op, char **argv)
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if (af == AF_INET6) {
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outdata = (void*)(outudp6 + 1);
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if (op & OPT_USE_ICMP) {
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ident |= 0x8000;
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outicmp6->icmp_type = ICMP6_ECHO_REQUEST;
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/*outicmp->icmp_code = 0; - set by xzalloc */
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outicmp6->icmp_id = htons(ident);
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outicmp6->icmp_id = ident;
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outdata = (void*)((char *)outicmp6 + SIZEOF_ICMP_HDR);
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}
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}
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@ -1069,6 +1076,8 @@ common_traceroute_main(int op, char **argv)
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#else
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len_and_sockaddr *source_lsa = xdotted2sockaddr(source, 0);
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#endif
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if (getuid() != 0)
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bb_simple_error_msg_and_die(bb_msg_you_must_be_root);
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/* Ping4 does this (why?) */
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if (af == AF_INET)
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if (setsockopt(sndsock, IPPROTO_IP, IP_MULTICAST_IF,
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