Date: Wed, 6 May 2020 22:13:09 +0000 (UTC) From: Michael Tuexen <tuexen@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r360709 - stable/11/usr.sbin/traceroute6 Message-ID: <202005062213.046MD9Un035373@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: tuexen Date: Wed May 6 22:13:08 2020 New Revision: 360709 URL: https://svnweb.freebsd.org/changeset/base/360709 Log: MFC r350027, r350028: Let traceroute6 not ignore some ICMPv6 packets MFC rr350027: Let packet_op() explicitly return the type and code instead of doing this implicitly by encoding it in a number space. No functional change intended. This is done as a preparation to add support for ICMPv6 mesages indicating a parameter problem related to the next header. MFC r350028: Add support for ICMPv6 messages indicating a parameter problem related to an unrecognized next header. Modified: stable/11/usr.sbin/traceroute6/traceroute6.8 stable/11/usr.sbin/traceroute6/traceroute6.c Directory Properties: stable/11/ (props changed) Modified: stable/11/usr.sbin/traceroute6/traceroute6.8 ============================================================================== --- stable/11/usr.sbin/traceroute6/traceroute6.8 Wed May 6 22:07:48 2020 (r360708) +++ stable/11/usr.sbin/traceroute6/traceroute6.8 Wed May 6 22:13:08 2020 (r360709) @@ -29,7 +29,7 @@ .\" .\" $FreeBSD$ .\" -.Dd May 2, 2018 +.Dd July 16, 2019 .Dt TRACEROUTE6 8 .Os .\" @@ -172,6 +172,8 @@ Destination Unreachable - Administratively Prohibited. Destination Unreachable - Not a Neighbour. .It !A Destination Unreachable - Address Unreachable. +.It !H +Parameter Problem - Unrecognized Next Header Type. .It !\& This is printed if the hop limit is <= 1 on a port unreachable message. This means that the packet got to the destination, Modified: stable/11/usr.sbin/traceroute6/traceroute6.c ============================================================================== --- stable/11/usr.sbin/traceroute6/traceroute6.c Wed May 6 22:07:48 2020 (r360708) +++ stable/11/usr.sbin/traceroute6/traceroute6.c Wed May 6 22:13:08 2020 (r360709) @@ -307,7 +307,7 @@ void *get_uphdr(struct ip6_hdr *, u_char *); int get_hoplim(struct msghdr *); double deltaT(struct timeval *, struct timeval *); const char *pr_type(int); -int packet_ok(struct msghdr *, int, int); +int packet_ok(struct msghdr *, int, int, u_char *, u_char *); void print(struct msghdr *, int); const char *inetname(struct sockaddr *); u_int32_t sctp_crc32c(void *, u_int32_t); @@ -365,6 +365,7 @@ main(int argc, char *argv[]) struct hostent *hp; size_t size, minlen; uid_t uid; + u_char type, code; /* * Receive ICMP @@ -935,7 +936,7 @@ main(int argc, char *argv[]) send_probe(++seq, hops); while ((cc = wait_for_reply(rcvsock, &rcvmhdr))) { (void) gettimeofday(&t2, NULL); - if ((i = packet_ok(&rcvmhdr, cc, seq))) { + if (packet_ok(&rcvmhdr, cc, seq, &type, &code)) { if (!IN6_ARE_ADDR_EQUAL(&Rcv.sin6_addr, &lastaddr)) { if (probe > 0) @@ -944,29 +945,40 @@ main(int argc, char *argv[]) lastaddr = Rcv.sin6_addr; } printf(" %.3f ms", deltaT(&t1, &t2)); - switch (i - 1) { - case ICMP6_DST_UNREACH_NOROUTE: - ++unreachable; - printf(" !N"); - break; - case ICMP6_DST_UNREACH_ADMIN: - ++unreachable; - printf(" !P"); - break; - case ICMP6_DST_UNREACH_NOTNEIGHBOR: - ++unreachable; - printf(" !S"); - break; - case ICMP6_DST_UNREACH_ADDR: - ++unreachable; - printf(" !A"); - break; - case ICMP6_DST_UNREACH_NOPORT: + if (type == ICMP6_DST_UNREACH) { + switch (code) { + case ICMP6_DST_UNREACH_NOROUTE: + ++unreachable; + printf(" !N"); + break; + case ICMP6_DST_UNREACH_ADMIN: + ++unreachable; + printf(" !P"); + break; + case ICMP6_DST_UNREACH_NOTNEIGHBOR: + ++unreachable; + printf(" !S"); + break; + case ICMP6_DST_UNREACH_ADDR: + ++unreachable; + printf(" !A"); + break; + case ICMP6_DST_UNREACH_NOPORT: + if (rcvhlim >= 0 && + rcvhlim <= 1) + printf(" !"); + ++got_there; + break; + } + } else if (type == ICMP6_PARAM_PROB && + code == ICMP6_PARAMPROB_NEXTHEADER) { + printf(" !H"); + ++got_there; + } else if (type == ICMP6_ECHO_REPLY) { if (rcvhlim >= 0 && rcvhlim <= 1) printf(" !"); ++got_there; - break; } break; } else if (deltaT(&t1, &t2) > waittime * 1000) { @@ -1263,11 +1275,10 @@ pr_type(int t0) } int -packet_ok(struct msghdr *mhdr, int cc, int seq) +packet_ok(struct msghdr *mhdr, int cc, int seq, u_char *type, u_char *code) { struct icmp6_hdr *icp; struct sockaddr_in6 *from = (struct sockaddr_in6 *)mhdr->msg_name; - u_char type, code; char *buf = (char *)mhdr->msg_iov[0].iov_base; struct cmsghdr *cm; int *hlimp; @@ -1332,10 +1343,13 @@ packet_ok(struct msghdr *mhdr, int cc, int seq) else rcvhlim = *hlimp; - type = icp->icmp6_type; - code = icp->icmp6_code; - if ((type == ICMP6_TIME_EXCEEDED && code == ICMP6_TIME_EXCEED_TRANSIT) - || type == ICMP6_DST_UNREACH) { + *type = icp->icmp6_type; + *code = icp->icmp6_code; + if ((*type == ICMP6_TIME_EXCEEDED && + *code == ICMP6_TIME_EXCEED_TRANSIT) || + (*type == ICMP6_DST_UNREACH) || + (*type == ICMP6_PARAM_PROB && + *code == ICMP6_PARAMPROB_NEXTHEADER)) { struct ip6_hdr *hip; struct icmp6_hdr *icmp; struct sctp_init_chunk *init; @@ -1355,15 +1369,13 @@ packet_ok(struct msghdr *mhdr, int cc, int seq) icmp = (struct icmp6_hdr *)up; if (icmp->icmp6_id == ident && icmp->icmp6_seq == htons(seq)) - return (type == ICMP6_TIME_EXCEEDED ? - -1 : code + 1); + return (1); break; case IPPROTO_UDP: udp = (struct udphdr *)up; if (udp->uh_sport == htons(srcport) && udp->uh_dport == htons(port + seq)) - return (type == ICMP6_TIME_EXCEEDED ? - -1 : code + 1); + return (1); break; case IPPROTO_SCTP: sctp = (struct sctphdr *)up; @@ -1379,20 +1391,17 @@ packet_ok(struct msghdr *mhdr, int cc, int seq) init = (struct sctp_init_chunk *)(sctp + 1); /* Check the initiate tag, if available. */ if ((char *)&init->init.a_rwnd > buf + cc) { - return (type == ICMP6_TIME_EXCEEDED ? - -1 : code + 1); + return (1); } if (init->init.initiate_tag == (u_int32_t) ((sctp->src_port << 16) | sctp->dest_port)) { - return (type == ICMP6_TIME_EXCEEDED ? - -1 : code + 1); + return (1); } } else { if (sctp->v_tag == (u_int32_t)((sctp->src_port << 16) | sctp->dest_port)) { - return (type == ICMP6_TIME_EXCEEDED ? - -1 : code + 1); + return (1); } } break; @@ -1402,19 +1411,18 @@ packet_ok(struct msghdr *mhdr, int cc, int seq) tcp->th_dport == htons(port + seq) && tcp->th_seq == (tcp_seq)((tcp->th_sport << 16) | tcp->th_dport)) - return (type == ICMP6_TIME_EXCEEDED ? - -1 : code + 1); + return (1); break; case IPPROTO_NONE: - return (type == ICMP6_TIME_EXCEEDED ? -1 : code + 1); + return (1); default: fprintf(stderr, "Unknown probe proto %d.\n", useproto); break; } - } else if (useproto == IPPROTO_ICMPV6 && type == ICMP6_ECHO_REPLY) { + } else if (useproto == IPPROTO_ICMPV6 && *type == ICMP6_ECHO_REPLY) { if (icp->icmp6_id == ident && icp->icmp6_seq == htons(seq)) - return (ICMP6_DST_UNREACH_NOPORT + 1); + return (1); } if (verbose) { char sbuf[NI_MAXHOST+1], dbuf[INET6_ADDRSTRLEN]; @@ -1427,8 +1435,8 @@ packet_ok(struct msghdr *mhdr, int cc, int seq) printf("\n%d bytes from %s to %s", cc, sbuf, rcvpktinfo ? inet_ntop(AF_INET6, &rcvpktinfo->ipi6_addr, dbuf, sizeof(dbuf)) : "?"); - printf(": icmp type %d (%s) code %d\n", type, pr_type(type), - icp->icmp6_code); + printf(": icmp type %d (%s) code %d\n", *type, pr_type(*type), + *code); p = (u_int8_t *)(icp + 1); #define WIDTH 16 for (i = 0; i < cc; i++) {
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?202005062213.046MD9Un035373>