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NTP: Use tstr for truncation indicator.
[tcpdump] / print-udp.c
diff --git a/print-udp.c b/print-udp.c
index 869f54e93312c8c219de56ca7270da4341027ce3..5a74ff2fc69c706d43002f6d770955c63c59ea95 100644 (file)
--- a/print-udp.c
+++ b/print-udp.c
@@ -19,54 +19,43 @@
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  */
 
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  */
 
-#ifndef lint
-static const char rcsid[] =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-udp.c,v 1.62 1999-10-17 21:56:54 mcr Exp $ (LBL)";
-#endif
-
-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/socket.h>
-
-#define __FAVOR_BSD
+/* \summary: UDP printer */
 
 
-#include <netinet/in.h>
-#include <netinet/in_systm.h>
-#include <netinet/ip.h>
-#include <netinet/udp.h>
-
-#ifdef NOERROR
-#undef NOERROR                                 /* Solaris sucks */
-#endif
-#ifdef T_UNSPEC
-#undef T_UNSPEC                                        /* SINIX does too */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
 #endif
 #endif
-#include <arpa/nameser.h>
-#ifdef SEGSIZE
-#undef SEGSIZE
-#endif
-#include <arpa/tftp.h>
-
-#include <rpc/rpc.h>
 
 
-#include <stdio.h>
+#include <netdissect-stdinc.h>
 
 
-#include "interface.h"
+#include "netdissect.h"
 #include "addrtoname.h"
 #include "addrtoname.h"
+#include "extract.h"
 #include "appletalk.h"
 
 #include "appletalk.h"
 
-#include "nfsv2.h"
-#include "bootp.h"
+#include "udp.h"
+
+#include "ip.h"
+#include "ip6.h"
+#include "ipproto.h"
+#include "rpc_auth.h"
+#include "rpc_msg.h"
+
+#include "nfs.h"
+
+static const char vat_tstr[] = " [|vat]";
+static const char rtp_tstr[] = " [|rtp]";
+static const char rtcp_tstr[] = " [|rtcp]";
+static const char udp_tstr[] = " [|udp]";
 
 struct rtcphdr {
 
 struct rtcphdr {
-       u_short rh_flags;       /* T:2 P:1 CNT:5 PT:8 */
-       u_short rh_len;         /* length of message (in words) */
-       u_int rh_ssrc;          /* synchronization src id */
+       uint16_t rh_flags;      /* T:2 P:1 CNT:5 PT:8 */
+       uint16_t rh_len;        /* length of message (in words) */
+       uint32_t rh_ssrc;       /* synchronization src id */
 };
 
 typedef struct {
 };
 
 typedef struct {
-       u_int upper;            /* more significant 32 bits */
-       u_int lower;            /* less significant 32 bits */
+       uint32_t upper; /* more significant 32 bits */
+       uint32_t lower; /* less significant 32 bits */
 } ntp64;
 
 /*
 } ntp64;
 
 /*
@@ -74,9 +63,9 @@ typedef struct {
  */
 struct rtcp_sr {
        ntp64 sr_ntp;           /* 64-bit ntp timestamp */
  */
 struct rtcp_sr {
        ntp64 sr_ntp;           /* 64-bit ntp timestamp */
-       u_int sr_ts;            /* reference media timestamp */
-       u_int sr_np;            /* no. packets sent */
-       u_int sr_nb;            /* no. bytes sent */
+       uint32_t sr_ts; /* reference media timestamp */
+       uint32_t sr_np; /* no. packets sent */
+       uint32_t sr_nb; /* no. bytes sent */
 };
 
 /*
 };
 
 /*
@@ -84,12 +73,12 @@ struct rtcp_sr {
  * Time stamps are middle 32-bits of ntp timestamp.
  */
 struct rtcp_rr {
  * Time stamps are middle 32-bits of ntp timestamp.
  */
 struct rtcp_rr {
-       u_int rr_srcid;         /* sender being reported */
-       u_int rr_nl;            /* no. packets lost */
-       u_int rr_ls;            /* extended last seq number received */
-       u_int rr_dv;            /* jitter (delay variance) */
-       u_int rr_lsr;           /* orig. ts from last rr from this src  */
-       u_int rr_dlsr;          /* time from recpt of last rr to xmit time */
+       uint32_t rr_srcid;      /* sender being reported */
+       uint32_t rr_nl; /* no. packets lost */
+       uint32_t rr_ls; /* extended last seq number received */
+       uint32_t rr_dv; /* jitter (delay variance) */
+       uint32_t rr_lsr;        /* orig. ts from last rr from this src  */
+       uint32_t rr_dlsr;       /* time from recpt of last rr to xmit time */
 };
 
 /*XXX*/
 };
 
 /*XXX*/
@@ -108,55 +97,72 @@ struct rtcp_rr {
 #define RTCP_PT_APP    204
 
 static void
 #define RTCP_PT_APP    204
 
 static void
-vat_print(const void *hdr, u_int len, register const struct udphdr *up)
+vat_print(netdissect_options *ndo, const void *hdr, register const struct udphdr *up)
 {
        /* vat/vt audio */
 {
        /* vat/vt audio */
-       u_int ts = *(u_short *)hdr;
+       u_int ts;
+
+       ND_TCHECK_16BITS((const u_int *)hdr);
+       ts = EXTRACT_16BITS(hdr);
        if ((ts & 0xf060) != 0) {
                /* probably vt */
        if ((ts & 0xf060) != 0) {
                /* probably vt */
-               (void)printf(" udp/vt %u %d / %d",
-                            (u_int32_t)(ntohs(up->uh_ulen) - sizeof(*up)),
-                            ts & 0x3ff, ts >> 10);
+               ND_TCHECK_16BITS(&up->uh_ulen);
+               ND_PRINT((ndo, "udp/vt %u %d / %d",
+                            (uint32_t)(EXTRACT_16BITS(&up->uh_ulen) - sizeof(*up)),
+                            ts & 0x3ff, ts >> 10));
        } else {
                /* probably vat */
        } else {
                /* probably vat */
-               u_int i0 = ntohl(((u_int *)hdr)[0]);
-               u_int i1 = ntohl(((u_int *)hdr)[1]);
-               printf(" udp/vat %u c%d %u%s",
-                       (u_int32_t)(ntohs(up->uh_ulen) - sizeof(*up) - 8),
+               uint32_t i0, i1;
+
+               ND_TCHECK_32BITS(&((const u_int *)hdr)[0]);
+               i0 = EXTRACT_32BITS(&((const u_int *)hdr)[0]);
+               ND_TCHECK_32BITS(&((const u_int *)hdr)[1]);
+               i1 = EXTRACT_32BITS(&((const u_int *)hdr)[1]);
+               ND_TCHECK_16BITS(&up->uh_ulen);
+               ND_PRINT((ndo, "udp/vat %u c%d %u%s",
+                       (uint32_t)(EXTRACT_16BITS(&up->uh_ulen) - sizeof(*up) - 8),
                        i0 & 0xffff,
                        i0 & 0xffff,
-                       i1, i0 & 0x800000? "*" : "");
+                       i1, i0 & 0x800000? "*" : ""));
                /* audio format */
                if (i0 & 0x1f0000)
                /* audio format */
                if (i0 & 0x1f0000)
-                       printf(" f%d", (i0 >> 16) & 0x1f);
+                       ND_PRINT((ndo, " f%d", (i0 >> 16) & 0x1f));
                if (i0 & 0x3f000000)
                if (i0 & 0x3f000000)
-                       printf(" s%d", (i0 >> 24) & 0x3f);
+                       ND_PRINT((ndo, " s%d", (i0 >> 24) & 0x3f));
        }
        }
+
+trunc:
+       ND_PRINT((ndo, "%s", vat_tstr));
 }
 
 static void
 }
 
 static void
-rtp_print(const void *hdr, u_int len, register const struct udphdr *up)
+rtp_print(netdissect_options *ndo, const void *hdr, u_int len,
+          register const struct udphdr *up)
 {
        /* rtp v1 or v2 */
 {
        /* rtp v1 or v2 */
-       u_int *ip = (u_int *)hdr;
-       u_int hasopt, hasext, contype, hasmarker;
-       u_int i0 = ntohl(((u_int *)hdr)[0]);
-       u_int i1 = ntohl(((u_int *)hdr)[1]);
-       u_int dlen = ntohs(up->uh_ulen) - sizeof(*up) - 8;
+       const u_int *ip = (const u_int *)hdr;
+       u_int hasopt, hasext, contype, hasmarker, dlen;
+       uint32_t i0, i1;
        const char * ptype;
 
        const char * ptype;
 
+       ND_TCHECK_32BITS(&((const u_int *)hdr)[0]);
+       i0 = EXTRACT_32BITS(&((const u_int *)hdr)[0]);
+       ND_TCHECK_32BITS(&((const u_int *)hdr)[1]);
+       i1 = EXTRACT_32BITS(&((const u_int *)hdr)[1]);
+       ND_TCHECK_16BITS(&up->uh_ulen);
+       dlen = EXTRACT_16BITS(&up->uh_ulen) - sizeof(*up) - 8;
        ip += 2;
        len >>= 2;
        len -= 2;
        hasopt = 0;
        hasext = 0;
        if ((i0 >> 30) == 1) {
        ip += 2;
        len >>= 2;
        len -= 2;
        hasopt = 0;
        hasext = 0;
        if ((i0 >> 30) == 1) {
-               /* rtp v1 */
+               /* rtp v1 - draft-ietf-avt-rtp-04 */
                hasopt = i0 & 0x800000;
                contype = (i0 >> 16) & 0x3f;
                hasmarker = i0 & 0x400000;
                ptype = "rtpv1";
        } else {
                hasopt = i0 & 0x800000;
                contype = (i0 >> 16) & 0x3f;
                hasmarker = i0 & 0x400000;
                ptype = "rtpv1";
        } else {
-               /* rtp v2 */
+               /* rtp v2 - RFC 3550 */
                hasext = i0 & 0x10000000;
                contype = (i0 >> 16) & 0x7f;
                hasmarker = i0 & 0x800000;
                hasext = i0 & 0x10000000;
                contype = (i0 >> 16) & 0x7f;
                hasmarker = i0 & 0x800000;
@@ -165,23 +171,25 @@ rtp_print(const void *hdr, u_int len, register const struct udphdr *up)
                ip += 1;
                len -= 1;
        }
                ip += 1;
                len -= 1;
        }
-       printf(" udp/%s %d c%d %s%s %d %u",
+       ND_PRINT((ndo, "udp/%s %d c%d %s%s %d %u",
                ptype,
                dlen,
                contype,
                (hasopt || hasext)? "+" : "",
                hasmarker? "*" : "",
                i0 & 0xffff,
                ptype,
                dlen,
                contype,
                (hasopt || hasext)? "+" : "",
                hasmarker? "*" : "",
                i0 & 0xffff,
-               i1);
-       if (vflag) {
-               printf(" %u", i1);
+               i1));
+       if (ndo->ndo_vflag) {
+               ND_TCHECK_32BITS(&((const u_int *)hdr)[2]);
+               ND_PRINT((ndo, " %u", EXTRACT_32BITS(&((const u_int *)hdr)[2])));
                if (hasopt) {
                        u_int i2, optlen;
                        do {
                if (hasopt) {
                        u_int i2, optlen;
                        do {
-                               i2 = ip[0];
+                               ND_TCHECK_32BITS(ip);
+                               i2 = EXTRACT_32BITS(ip);
                                optlen = (i2 >> 16) & 0xff;
                                if (optlen == 0 || optlen > len) {
                                optlen = (i2 >> 16) & 0xff;
                                if (optlen == 0 || optlen > len) {
-                                       printf(" !opt");
+                                       ND_PRINT((ndo, " !opt"));
                                        return;
                                }
                                ip += optlen;
                                        return;
                                }
                                ip += optlen;
@@ -190,277 +198,521 @@ rtp_print(const void *hdr, u_int len, register const struct udphdr *up)
                }
                if (hasext) {
                        u_int i2, extlen;
                }
                if (hasext) {
                        u_int i2, extlen;
-                       i2 = ip[0];
+                       ND_TCHECK_32BITS(ip);
+                       i2 = EXTRACT_32BITS(ip);
                        extlen = (i2 & 0xffff) + 1;
                        if (extlen > len) {
                        extlen = (i2 & 0xffff) + 1;
                        if (extlen > len) {
-                               printf(" !ext");
+                               ND_PRINT((ndo, " !ext"));
                                return;
                        }
                        ip += extlen;
                }
                                return;
                        }
                        ip += extlen;
                }
+               ND_TCHECK_32BITS(ip);
                if (contype == 0x1f) /*XXX H.261 */
                if (contype == 0x1f) /*XXX H.261 */
-                       printf(" 0x%04x", ip[0] >> 16);
+                       ND_PRINT((ndo, " 0x%04x", EXTRACT_32BITS(ip) >> 16));
        }
        }
+
+trunc:
+       ND_PRINT((ndo, "%s", rtp_tstr));
 }
 
 static const u_char *
 }
 
 static const u_char *
-rtcp_print(const u_char *hdr, const u_char *ep)
+rtcp_print(netdissect_options *ndo, const u_char *hdr, const u_char *ep)
 {
        /* rtp v2 control (rtcp) */
 {
        /* rtp v2 control (rtcp) */
-       struct rtcp_rr *rr = 0;
-       struct rtcp_sr *sr;
-       struct rtcphdr *rh = (struct rtcphdr *)hdr;
+       const struct rtcp_rr *rr = 0;
+       const struct rtcp_sr *sr;
+       const struct rtcphdr *rh = (const struct rtcphdr *)hdr;
        u_int len;
        u_int len;
-       u_short flags;
+       uint16_t flags;
        int cnt;
        double ts, dts;
        int cnt;
        double ts, dts;
-       if ((u_char *)(rh + 1) > ep) {
-               printf(" [|rtcp]");
-               return (ep);
-       }
-       len = (ntohs(rh->rh_len) + 1) * 4;
-       flags = ntohs(rh->rh_flags);
+       if ((const u_char *)(rh + 1) > ep)
+               goto trunc;
+       ND_TCHECK(*rh);
+       len = (EXTRACT_16BITS(&rh->rh_len) + 1) * 4;
+       flags = EXTRACT_16BITS(&rh->rh_flags);
        cnt = (flags >> 8) & 0x1f;
        switch (flags & 0xff) {
        case RTCP_PT_SR:
        cnt = (flags >> 8) & 0x1f;
        switch (flags & 0xff) {
        case RTCP_PT_SR:
-               sr = (struct rtcp_sr *)(rh + 1);
-               printf(" sr");
+               sr = (const struct rtcp_sr *)(rh + 1);
+               ND_PRINT((ndo, " sr"));
                if (len != cnt * sizeof(*rr) + sizeof(*sr) + sizeof(*rh))
                if (len != cnt * sizeof(*rr) + sizeof(*sr) + sizeof(*rh))
-                       printf(" [%d]", len);
-               if (vflag)
-                 printf(" %u", (u_int32_t)ntohl(rh->rh_ssrc));
-               if ((u_char *)(sr + 1) > ep) {
-                       printf(" [|rtcp]");
-                       return (ep);
-               }
-               ts = (double)((u_int32_t)ntohl(sr->sr_ntp.upper)) +
-                   ((double)((u_int32_t)ntohl(sr->sr_ntp.lower)) /
+                       ND_PRINT((ndo, " [%d]", len));
+               if (ndo->ndo_vflag)
+                       ND_PRINT((ndo, " %u", EXTRACT_32BITS(&rh->rh_ssrc)));
+               if ((const u_char *)(sr + 1) > ep)
+                       goto trunc;
+               ND_TCHECK(*sr);
+               ts = (double)(EXTRACT_32BITS(&sr->sr_ntp.upper)) +
+                   ((double)(EXTRACT_32BITS(&sr->sr_ntp.lower)) /
                    4294967296.0);
                    4294967296.0);
-               printf(" @%.2f %u %up %ub", ts, (u_int32_t)ntohl(sr->sr_ts),
-                   (u_int32_t)ntohl(sr->sr_np), (u_int32_t)ntohl(sr->sr_nb));
-               rr = (struct rtcp_rr *)(sr + 1);
+               ND_PRINT((ndo, " @%.2f %u %up %ub", ts, EXTRACT_32BITS(&sr->sr_ts),
+                   EXTRACT_32BITS(&sr->sr_np), EXTRACT_32BITS(&sr->sr_nb)));
+               rr = (const struct rtcp_rr *)(sr + 1);
                break;
        case RTCP_PT_RR:
                break;
        case RTCP_PT_RR:
-               printf(" rr");
+               ND_PRINT((ndo, " rr"));
                if (len != cnt * sizeof(*rr) + sizeof(*rh))
                if (len != cnt * sizeof(*rr) + sizeof(*rh))
-                       printf(" [%d]", len);
-               rr = (struct rtcp_rr *)(rh + 1);
-               if (vflag)
-                 printf(" %u", (u_int32_t)ntohl(rh->rh_ssrc));
+                       ND_PRINT((ndo, " [%d]", len));
+               rr = (const struct rtcp_rr *)(rh + 1);
+               if (ndo->ndo_vflag)
+                       ND_PRINT((ndo, " %u", EXTRACT_32BITS(&rh->rh_ssrc)));
                break;
        case RTCP_PT_SDES:
                break;
        case RTCP_PT_SDES:
-               printf(" sdes %d", len);
-               if (vflag)
-                 printf(" %u", (u_int32_t)ntohl(rh->rh_ssrc));
+               ND_PRINT((ndo, " sdes %d", len));
+               if (ndo->ndo_vflag)
+                       ND_PRINT((ndo, " %u", EXTRACT_32BITS(&rh->rh_ssrc)));
                cnt = 0;
                break;
        case RTCP_PT_BYE:
                cnt = 0;
                break;
        case RTCP_PT_BYE:
-               printf(" bye %d", len);
-               if (vflag)
-                 printf(" %u", (u_int32_t)ntohl(rh->rh_ssrc));
+               ND_PRINT((ndo, " bye %d", len));
+               if (ndo->ndo_vflag)
+                       ND_PRINT((ndo, " %u", EXTRACT_32BITS(&rh->rh_ssrc)));
                cnt = 0;
                break;
        default:
                cnt = 0;
                break;
        default:
-               printf(" type-0x%x %d", flags & 0xff, len);
+               ND_PRINT((ndo, " type-0x%x %d", flags & 0xff, len));
                cnt = 0;
                break;
        }
        if (cnt > 1)
                cnt = 0;
                break;
        }
        if (cnt > 1)
-               printf(" c%d", cnt);
+               ND_PRINT((ndo, " c%d", cnt));
        while (--cnt >= 0) {
        while (--cnt >= 0) {
-               if ((u_char *)(rr + 1) > ep) {
-                       printf(" [|rtcp]");
-                       return (ep);
-               }
-               if (vflag)
-                       printf(" %u", (u_int32_t)ntohl(rr->rr_srcid));
-               ts = (double)((u_int32_t)ntohl(rr->rr_lsr)) / 65536.;
-               dts = (double)((u_int32_t)ntohl(rr->rr_dlsr)) / 65536.;
-               printf(" %ul %us %uj @%.2f+%.2f",
-                   (u_int32_t)ntohl(rr->rr_nl) & 0x00ffffff,
-                   (u_int32_t)ntohl(rr->rr_ls),
-                   (u_int32_t)ntohl(rr->rr_dv), ts, dts);
+               if ((const u_char *)(rr + 1) > ep)
+                       goto trunc;
+               ND_TCHECK(*rr);
+               if (ndo->ndo_vflag)
+                       ND_PRINT((ndo, " %u", EXTRACT_32BITS(&rr->rr_srcid)));
+               ts = (double)(EXTRACT_32BITS(&rr->rr_lsr)) / 65536.;
+               dts = (double)(EXTRACT_32BITS(&rr->rr_dlsr)) / 65536.;
+               ND_PRINT((ndo, " %ul %us %uj @%.2f+%.2f",
+                   EXTRACT_32BITS(&rr->rr_nl) & 0x00ffffff,
+                   EXTRACT_32BITS(&rr->rr_ls),
+                   EXTRACT_32BITS(&rr->rr_dv), ts, dts));
        }
        return (hdr + len);
        }
        return (hdr + len);
+
+trunc:
+       ND_PRINT((ndo, "%s", rtcp_tstr));
+       return ep;
+}
+
+static int udp_cksum(netdissect_options *ndo, register const struct ip *ip,
+                    register const struct udphdr *up,
+                    register u_int len)
+{
+       return nextproto4_cksum(ndo, ip, (const uint8_t *)(const void *)up, len, len,
+                               IPPROTO_UDP);
 }
 
 }
 
-/* XXX probably should use getservbyname() and cache answers */
-#define TFTP_PORT 69           /*XXX*/
-#define KERBEROS_PORT 88       /*XXX*/
-#define SUNRPC_PORT 111                /*XXX*/
-#define SNMP_PORT 161          /*XXX*/
-#define NTP_PORT 123           /*XXX*/
-#define SNMPTRAP_PORT 162      /*XXX*/
-#define RIP_PORT 520           /*XXX*/
-#define KERBEROS_SEC_PORT 750  /*XXX*/
+static int udp6_cksum(netdissect_options *ndo, const struct ip6_hdr *ip6,
+                     const struct udphdr *up, u_int len)
+{
+       return nextproto6_cksum(ndo, ip6, (const uint8_t *)(const void *)up, len, len,
+                               IPPROTO_UDP);
+}
 
 
-#define ISAKMP_PORT 500
-#define ISAKMP_UPORT1 7500
-#define ISAKMP_UPORT2 8500
+static void
+udpipaddr_print(netdissect_options *ndo, const struct ip *ip, int sport, int dport)
+{
+       const struct ip6_hdr *ip6;
+
+       if (IP_V(ip) == 6)
+               ip6 = (const struct ip6_hdr *)ip;
+       else
+               ip6 = NULL;
+
+       if (ip6) {
+               if (ip6->ip6_nxt == IPPROTO_UDP) {
+                       if (sport == -1) {
+                               ND_PRINT((ndo, "%s > %s: ",
+                                       ip6addr_string(ndo, &ip6->ip6_src),
+                                       ip6addr_string(ndo, &ip6->ip6_dst)));
+                       } else {
+                               ND_PRINT((ndo, "%s.%s > %s.%s: ",
+                                       ip6addr_string(ndo, &ip6->ip6_src),
+                                       udpport_string(ndo, sport),
+                                       ip6addr_string(ndo, &ip6->ip6_dst),
+                                       udpport_string(ndo, dport)));
+                       }
+               } else {
+                       if (sport != -1) {
+                               ND_PRINT((ndo, "%s > %s: ",
+                                       udpport_string(ndo, sport),
+                                       udpport_string(ndo, dport)));
+                       }
+               }
+       } else {
+               if (ip->ip_p == IPPROTO_UDP) {
+                       if (sport == -1) {
+                               ND_PRINT((ndo, "%s > %s: ",
+                                       ipaddr_string(ndo, &ip->ip_src),
+                                       ipaddr_string(ndo, &ip->ip_dst)));
+                       } else {
+                               ND_PRINT((ndo, "%s.%s > %s.%s: ",
+                                       ipaddr_string(ndo, &ip->ip_src),
+                                       udpport_string(ndo, sport),
+                                       ipaddr_string(ndo, &ip->ip_dst),
+                                       udpport_string(ndo, dport)));
+                       }
+               } else {
+                       if (sport != -1) {
+                               ND_PRINT((ndo, "%s > %s: ",
+                                       udpport_string(ndo, sport),
+                                       udpport_string(ndo, dport)));
+                       }
+               }
+       }
+}
 
 void
 
 void
-udp_print(register const u_char *bp, u_int length, register const u_char *bp2)
+udp_print(netdissect_options *ndo, register const u_char *bp, u_int length,
+         register const u_char *bp2, int fragmented)
 {
        register const struct udphdr *up;
        register const struct ip *ip;
        register const u_char *cp;
        register const u_char *ep = bp + length;
 {
        register const struct udphdr *up;
        register const struct ip *ip;
        register const u_char *cp;
        register const u_char *ep = bp + length;
-       u_short sport, dport, ulen;
-
-       if (ep > snapend)
-               ep = snapend;
-       up = (struct udphdr *)bp;
-       ip = (struct ip *)bp2;
-       cp = (u_char *)(up + 1);
-       if (cp > snapend) {
-               printf("[|udp]");
-               return;
+       uint16_t sport, dport, ulen;
+       register const struct ip6_hdr *ip6;
+
+       if (ep > ndo->ndo_snapend)
+               ep = ndo->ndo_snapend;
+       up = (const struct udphdr *)bp;
+       ip = (const struct ip *)bp2;
+       if (IP_V(ip) == 6)
+               ip6 = (const struct ip6_hdr *)bp2;
+       else
+               ip6 = NULL;
+       if (!ND_TTEST(up->uh_dport)) {
+               udpipaddr_print(ndo, ip, -1, -1);
+               goto trunc;
        }
        }
+
+       sport = EXTRACT_16BITS(&up->uh_sport);
+       dport = EXTRACT_16BITS(&up->uh_dport);
+
        if (length < sizeof(struct udphdr)) {
        if (length < sizeof(struct udphdr)) {
-               (void)printf(" truncated-udp %d", length);
+               udpipaddr_print(ndo, ip, sport, dport);
+               ND_PRINT((ndo, "truncated-udp %d", length));
                return;
        }
                return;
        }
+       if (!ND_TTEST(up->uh_ulen)) {
+               udpipaddr_print(ndo, ip, sport, dport);
+               goto trunc;
+       }
+       ulen = EXTRACT_16BITS(&up->uh_ulen);
+       if (ulen < sizeof(struct udphdr)) {
+               udpipaddr_print(ndo, ip, sport, dport);
+               ND_PRINT((ndo, "truncated-udplength %d", ulen));
+               return;
+       }
+       ulen -= sizeof(struct udphdr);
        length -= sizeof(struct udphdr);
        length -= sizeof(struct udphdr);
+       if (ulen < length)
+               length = ulen;
+
+       cp = (const u_char *)(up + 1);
+       if (cp > ndo->ndo_snapend) {
+               udpipaddr_print(ndo, ip, sport, dport);
+               goto trunc;
+       }
 
 
-       sport = ntohs(up->uh_sport);
-       dport = ntohs(up->uh_dport);
-       ulen = ntohs(up->uh_ulen);
-       if (packettype) {
-               register struct rpc_msg *rp;
-               enum msg_type direction;
+       if (ndo->ndo_packettype) {
+               register const struct sunrpc_msg *rp;
+               enum sunrpc_msg_type direction;
 
 
-               switch (packettype) {
+               switch (ndo->ndo_packettype) {
 
                case PT_VAT:
 
                case PT_VAT:
-                       (void)printf("%s.%s > %s.%s:",
-                               ipaddr_string(&ip->ip_src),
-                               udpport_string(sport),
-                               ipaddr_string(&ip->ip_dst),
-                               udpport_string(dport));
-                       vat_print((void *)(up + 1), length, up);
+                       udpipaddr_print(ndo, ip, sport, dport);
+                       vat_print(ndo, (const void *)(up + 1), up);
                        break;
 
                case PT_WB:
                        break;
 
                case PT_WB:
-                       (void)printf("%s.%s > %s.%s:",
-                               ipaddr_string(&ip->ip_src),
-                               udpport_string(sport),
-                               ipaddr_string(&ip->ip_dst),
-                               udpport_string(dport));
-                       wb_print((void *)(up + 1), length);
+                       udpipaddr_print(ndo, ip, sport, dport);
+                       wb_print(ndo, (const void *)(up + 1), length);
                        break;
 
                case PT_RPC:
                        break;
 
                case PT_RPC:
-                       rp = (struct rpc_msg *)(up + 1);
-                       direction = (enum msg_type)ntohl(rp->rm_direction);
-                       if (direction == CALL)
-                               sunrpcrequest_print((u_char *)rp, length,
-                                   (u_char *)ip);
+                       rp = (const struct sunrpc_msg *)(up + 1);
+                       direction = (enum sunrpc_msg_type)EXTRACT_32BITS(&rp->rm_direction);
+                       if (direction == SUNRPC_CALL)
+                               sunrpcrequest_print(ndo, (const u_char *)rp, length,
+                                   (const u_char *)ip);
                        else
                        else
-                               nfsreply_print((u_char *)rp, length,
-                                   (u_char *)ip);                      /*XXX*/
+                               nfsreply_print(ndo, (const u_char *)rp, length,
+                                   (const u_char *)ip);                        /*XXX*/
                        break;
 
                case PT_RTP:
                        break;
 
                case PT_RTP:
-                       (void)printf("%s.%s > %s.%s:",
-                               ipaddr_string(&ip->ip_src),
-                               udpport_string(sport),
-                               ipaddr_string(&ip->ip_dst),
-                               udpport_string(dport));
-                       rtp_print((void *)(up + 1), length, up);
+                       udpipaddr_print(ndo, ip, sport, dport);
+                       rtp_print(ndo, (const void *)(up + 1), length, up);
                        break;
 
                case PT_RTCP:
                        break;
 
                case PT_RTCP:
-                       (void)printf("%s.%s > %s.%s:",
-                               ipaddr_string(&ip->ip_src),
-                               udpport_string(sport),
-                               ipaddr_string(&ip->ip_dst),
-                               udpport_string(dport));
+                       udpipaddr_print(ndo, ip, sport, dport);
                        while (cp < ep)
                        while (cp < ep)
-                               cp = rtcp_print(cp, ep);
+                               cp = rtcp_print(ndo, cp, ep);
                        break;
 
                case PT_SNMP:
                        break;
 
                case PT_SNMP:
-                       (void)printf("%s.%s > %s.%s:",
-                                ipaddr_string(&ip->ip_src),
-                                udpport_string(sport),
-                                ipaddr_string(&ip->ip_dst),
-                                udpport_string(dport));
-                       snmp_print((const u_char *)(up + 1), length);
+                       udpipaddr_print(ndo, ip, sport, dport);
+                       snmp_print(ndo, (const u_char *)(up + 1), length);
+                       break;
+
+               case PT_CNFP:
+                       udpipaddr_print(ndo, ip, sport, dport);
+                       cnfp_print(ndo, cp);
+                       break;
+
+               case PT_TFTP:
+                       udpipaddr_print(ndo, ip, sport, dport);
+                       tftp_print(ndo, cp, length);
+                       break;
+
+               case PT_AODV:
+                       udpipaddr_print(ndo, ip, sport, dport);
+                       aodv_print(ndo, (const u_char *)(up + 1), length,
+                           ip6 != NULL);
+                       break;
+
+               case PT_RADIUS:
+                       udpipaddr_print(ndo, ip, sport, dport);
+                       radius_print(ndo, cp, length);
+                       break;
+
+               case PT_VXLAN:
+                       udpipaddr_print(ndo, ip, sport, dport);
+                       vxlan_print(ndo, (const u_char *)(up + 1), length);
+                       break;
+
+               case PT_PGM:
+               case PT_PGM_ZMTP1:
+                       udpipaddr_print(ndo, ip, sport, dport);
+                       pgm_print(ndo, cp, length, bp2);
+                       break;
+               case PT_LMP:
+                       udpipaddr_print(ndo, ip, sport, dport);
+                       lmp_print(ndo, cp, length);
                        break;
                }
                return;
        }
 
                        break;
                }
                return;
        }
 
-       if (!qflag) {
-               register struct rpc_msg *rp;
-               enum msg_type direction;
-
-               rp = (struct rpc_msg *)(up + 1);
-               if (TTEST(rp->rm_direction)) {
-                       direction = (enum msg_type)ntohl(rp->rm_direction);
-                       if (dport == NFS_PORT && direction == CALL) {
-                               nfsreq_print((u_char *)rp, length,
-                                   (u_char *)ip);
+       udpipaddr_print(ndo, ip, sport, dport);
+       if (!ndo->ndo_qflag) {
+               register const struct sunrpc_msg *rp;
+               enum sunrpc_msg_type direction;
+
+               rp = (const struct sunrpc_msg *)(up + 1);
+               if (ND_TTEST(rp->rm_direction)) {
+                       direction = (enum sunrpc_msg_type)EXTRACT_32BITS(&rp->rm_direction);
+                       if (dport == NFS_PORT && direction == SUNRPC_CALL) {
+                               ND_PRINT((ndo, "NFS request xid %u ", EXTRACT_32BITS(&rp->rm_xid)));
+                               nfsreq_print_noaddr(ndo, (const u_char *)rp, length,
+                                   (const u_char *)ip);
                                return;
                        }
                                return;
                        }
-                       if (sport == NFS_PORT && direction == REPLY) {
-                               nfsreply_print((u_char *)rp, length,
-                                   (u_char *)ip);
+                       if (sport == NFS_PORT && direction == SUNRPC_REPLY) {
+                               ND_PRINT((ndo, "NFS reply xid %u ", EXTRACT_32BITS(&rp->rm_xid)));
+                               nfsreply_print_noaddr(ndo, (const u_char *)rp, length,
+                                   (const u_char *)ip);
                                return;
                        }
 #ifdef notdef
                                return;
                        }
 #ifdef notdef
-                       if (dport == SUNRPC_PORT && direction == CALL) {
-                               sunrpcrequest_print((u_char *)rp, length, (u_char *)ip);
+                       if (dport == SUNRPC_PORT && direction == SUNRPC_CALL) {
+                               sunrpcrequest_print((const u_char *)rp, length, (const u_char *)ip);
                                return;
                        }
 #endif
                }
                                return;
                        }
 #endif
                }
-               if (TTEST(((struct LAP *)cp)->type) &&
-                   ((struct LAP *)cp)->type == lapDDP &&
-                   (atalk_port(sport) || atalk_port(dport))) {
-                       if (vflag)
-                               fputs("kip ", stdout);
-                       atalk_print(cp, length);
-                       return;
-               }
        }
        }
-       (void)printf("%s.%s > %s.%s:",
-               ipaddr_string(&ip->ip_src), udpport_string(sport),
-               ipaddr_string(&ip->ip_dst), udpport_string(dport));
-
-       if (!qflag) {
-#define ISPORT(p) (dport == (p) || sport == (p))
-               if (ISPORT(NAMESERVER_PORT))
-                       ns_print((const u_char *)(up + 1), length);
-               else if (ISPORT(TFTP_PORT))
-                       tftp_print((const u_char *)(up + 1), length);
-               else if (ISPORT(IPPORT_BOOTPC) || ISPORT(IPPORT_BOOTPS))
-                       bootp_print((const u_char *)(up + 1), length,
-                           sport, dport);
-               else if (ISPORT(RIP_PORT))
-                       rip_print((const u_char *)(up + 1), length);
-               else if (ISPORT(SNMP_PORT) || ISPORT(SNMPTRAP_PORT))
-                       snmp_print((const u_char *)(up + 1), length);
-               else if (ISPORT(NTP_PORT))
-                       ntp_print((const u_char *)(up + 1), length);
-               else if (ISPORT(KERBEROS_PORT) || ISPORT(KERBEROS_SEC_PORT))
-                       krb_print((const void *)(up + 1), length);
-                else if (ISPORT(ISAKMP_PORT) ||
-                         ISPORT(ISAKMP_UPORT1) ||
-                         ISPORT(ISAKMP_UPORT2)) {
-                       isakmp_print((const u_char *)(up + 1), length);
+
+       if (ndo->ndo_vflag && !ndo->ndo_Kflag && !fragmented) {
+                /* Check the checksum, if possible. */
+                uint16_t sum, udp_sum;
+
+               /*
+                * XXX - do this even if vflag == 1?
+                * TCP does, and we do so for UDP-over-IPv6.
+                */
+               if (IP_V(ip) == 4 && (ndo->ndo_vflag > 1)) {
+                       udp_sum = EXTRACT_16BITS(&up->uh_sum);
+                       if (udp_sum == 0) {
+                               ND_PRINT((ndo, "[no cksum] "));
+                       } else if (ND_TTEST2(cp[0], length)) {
+                               sum = udp_cksum(ndo, ip, up, length + sizeof(struct udphdr));
+
+                               if (sum != 0) {
+                                       ND_PRINT((ndo, "[bad udp cksum 0x%04x -> 0x%04x!] ",
+                                           udp_sum,
+                                           in_cksum_shouldbe(udp_sum, sum)));
+                               } else
+                                       ND_PRINT((ndo, "[udp sum ok] "));
+                       }
                }
                }
-               else if (dport == 3456)
-                       vat_print((const void *)(up + 1), length, up);
+               else if (IP_V(ip) == 6 && ip6->ip6_plen) {
+                       /* for IPv6, UDP checksum is mandatory */
+                       if (ND_TTEST2(cp[0], length)) {
+                               sum = udp6_cksum(ndo, ip6, up, length + sizeof(struct udphdr));
+                               udp_sum = EXTRACT_16BITS(&up->uh_sum);
+
+                               if (sum != 0) {
+                                       ND_PRINT((ndo, "[bad udp cksum 0x%04x -> 0x%04x!] ",
+                                           udp_sum,
+                                           in_cksum_shouldbe(udp_sum, sum)));
+                               } else
+                                       ND_PRINT((ndo, "[udp sum ok] "));
+                       }
+               }
+       }
+
+       if (!ndo->ndo_qflag) {
+               if (IS_SRC_OR_DST_PORT(NAMESERVER_PORT))
+                       ns_print(ndo, (const u_char *)(up + 1), length, 0);
+               else if (IS_SRC_OR_DST_PORT(MULTICASTDNS_PORT))
+                       ns_print(ndo, (const u_char *)(up + 1), length, 1);
+               else if (IS_SRC_OR_DST_PORT(TIMED_PORT))
+                       timed_print(ndo, (const u_char *)(up + 1));
+               else if (IS_SRC_OR_DST_PORT(TFTP_PORT))
+                       tftp_print(ndo, (const u_char *)(up + 1), length);
+               else if (IS_SRC_OR_DST_PORT(BOOTPC_PORT) || IS_SRC_OR_DST_PORT(BOOTPS_PORT))
+                       bootp_print(ndo, (const u_char *)(up + 1), length);
+               else if (IS_SRC_OR_DST_PORT(RIP_PORT))
+                       rip_print(ndo, (const u_char *)(up + 1), length);
+               else if (IS_SRC_OR_DST_PORT(AODV_PORT))
+                       aodv_print(ndo, (const u_char *)(up + 1), length,
+                           ip6 != NULL);
+               else if (IS_SRC_OR_DST_PORT(ISAKMP_PORT))
+                        isakmp_print(ndo, (const u_char *)(up + 1), length, bp2);
+               else if (IS_SRC_OR_DST_PORT(ISAKMP_PORT_NATT))
+                        isakmp_rfc3948_print(ndo, (const u_char *)(up + 1), length, bp2);
+#if 1 /*???*/
+               else if (IS_SRC_OR_DST_PORT(ISAKMP_PORT_USER1) || IS_SRC_OR_DST_PORT(ISAKMP_PORT_USER2))
+                       isakmp_print(ndo, (const u_char *)(up + 1), length, bp2);
+#endif
+               else if (IS_SRC_OR_DST_PORT(SNMP_PORT) || IS_SRC_OR_DST_PORT(SNMPTRAP_PORT))
+                       snmp_print(ndo, (const u_char *)(up + 1), length);
+               else if (IS_SRC_OR_DST_PORT(NTP_PORT))
+                       ntp_print(ndo, (const u_char *)(up + 1), length);
+               else if (IS_SRC_OR_DST_PORT(KERBEROS_PORT) || IS_SRC_OR_DST_PORT(KERBEROS_SEC_PORT))
+                       krb_print(ndo, (const void *)(up + 1));
+               else if (IS_SRC_OR_DST_PORT(L2TP_PORT))
+                       l2tp_print(ndo, (const u_char *)(up + 1), length);
+#ifdef ENABLE_SMB
+               else if (IS_SRC_OR_DST_PORT(NETBIOS_NS_PORT))
+                       nbt_udp137_print(ndo, (const u_char *)(up + 1), length);
+               else if (IS_SRC_OR_DST_PORT(NETBIOS_DGRAM_PORT))
+                       nbt_udp138_print(ndo, (const u_char *)(up + 1), length);
+#endif
+               else if (dport == VAT_PORT)
+                       vat_print(ndo, (const void *)(up + 1), up);
+               else if (IS_SRC_OR_DST_PORT(ZEPHYR_SRV_PORT) || IS_SRC_OR_DST_PORT(ZEPHYR_CLT_PORT))
+                       zephyr_print(ndo, (const void *)(up + 1), length);
+               /*
+                * Since there are 10 possible ports to check, I think
+                * a <> test would be more efficient
+                */
+               else if ((sport >= RX_PORT_LOW && sport <= RX_PORT_HIGH) ||
+                        (dport >= RX_PORT_LOW && dport <= RX_PORT_HIGH))
+                       rx_print(ndo, (const void *)(up + 1), length, sport, dport,
+                                (const u_char *) ip);
+               else if (IS_SRC_OR_DST_PORT(RIPNG_PORT))
+                       ripng_print(ndo, (const u_char *)(up + 1), length);
+               else if (IS_SRC_OR_DST_PORT(DHCP6_SERV_PORT) || IS_SRC_OR_DST_PORT(DHCP6_CLI_PORT))
+                       dhcp6_print(ndo, (const u_char *)(up + 1), length);
+               else if (IS_SRC_OR_DST_PORT(AHCP_PORT))
+                       ahcp_print(ndo, (const u_char *)(up + 1), length);
+               else if (IS_SRC_OR_DST_PORT(BABEL_PORT) || IS_SRC_OR_DST_PORT(BABEL_PORT_OLD))
+                       babel_print(ndo, (const u_char *)(up + 1), length);
+               else if (IS_SRC_OR_DST_PORT(HNCP_PORT))
+                       hncp_print(ndo, (const u_char *)(up + 1), length);
                /*
                 * Kludge in test for whiteboard packets.
                 */
                /*
                 * Kludge in test for whiteboard packets.
                 */
-               else if (dport == 4567)
-                       wb_print((const void *)(up + 1), length);
+               else if (dport == WB_PORT)
+                       wb_print(ndo, (const void *)(up + 1), length);
+               else if (IS_SRC_OR_DST_PORT(CISCO_AUTORP_PORT))
+                       cisco_autorp_print(ndo, (const void *)(up + 1), length);
+               else if (IS_SRC_OR_DST_PORT(RADIUS_PORT) ||
+                        IS_SRC_OR_DST_PORT(RADIUS_NEW_PORT) ||
+                        IS_SRC_OR_DST_PORT(RADIUS_ACCOUNTING_PORT) ||
+                        IS_SRC_OR_DST_PORT(RADIUS_NEW_ACCOUNTING_PORT) ||
+                        IS_SRC_OR_DST_PORT(RADIUS_CISCO_COA_PORT) ||
+                        IS_SRC_OR_DST_PORT(RADIUS_COA_PORT) )
+                       radius_print(ndo, (const u_char *)(up+1), length);
+               else if (dport == HSRP_PORT)
+                       hsrp_print(ndo, (const u_char *)(up + 1), length);
+               else if (IS_SRC_OR_DST_PORT(LWRES_PORT))
+                       lwres_print(ndo, (const u_char *)(up + 1), length);
+               else if (IS_SRC_OR_DST_PORT(LDP_PORT))
+                       ldp_print(ndo, (const u_char *)(up + 1), length);
+               else if (IS_SRC_OR_DST_PORT(OLSR_PORT))
+                       olsr_print(ndo, (const u_char *)(up + 1), length,
+                                       (IP_V(ip) == 6) ? 1 : 0);
+               else if (IS_SRC_OR_DST_PORT(MPLS_LSP_PING_PORT))
+                       lspping_print(ndo, (const u_char *)(up + 1), length);
+               else if (dport == BFD_CONTROL_PORT ||
+                        dport == BFD_ECHO_PORT )
+                       bfd_print(ndo, (const u_char *)(up+1), length, dport);
+                else if (IS_SRC_OR_DST_PORT(LMP_PORT))
+                       lmp_print(ndo, (const u_char *)(up + 1), length);
+               else if (IS_SRC_OR_DST_PORT(VQP_PORT))
+                       vqp_print(ndo, (const u_char *)(up + 1), length);
+                else if (IS_SRC_OR_DST_PORT(SFLOW_PORT))
+                        sflow_print(ndo, (const u_char *)(up + 1), length);
+               else if (dport == LWAPP_CONTROL_PORT)
+                       lwapp_control_print(ndo, (const u_char *)(up + 1), length, 1);
+                else if (sport == LWAPP_CONTROL_PORT)
+                        lwapp_control_print(ndo, (const u_char *)(up + 1), length, 0);
+                else if (IS_SRC_OR_DST_PORT(LWAPP_DATA_PORT))
+                        lwapp_data_print(ndo, (const u_char *)(up + 1), length);
+                else if (IS_SRC_OR_DST_PORT(SIP_PORT))
+                       sip_print(ndo, (const u_char *)(up + 1), length);
+                else if (IS_SRC_OR_DST_PORT(SYSLOG_PORT))
+                       syslog_print(ndo, (const u_char *)(up + 1), length);
+                else if (IS_SRC_OR_DST_PORT(OTV_PORT))
+                       otv_print(ndo, (const u_char *)(up + 1), length);
+                else if (IS_SRC_OR_DST_PORT(VXLAN_PORT))
+                       vxlan_print(ndo, (const u_char *)(up + 1), length);
+                else if (IS_SRC_OR_DST_PORT(GENEVE_PORT))
+                       geneve_print(ndo, (const u_char *)(up + 1), length);
+               else if (IS_SRC_OR_DST_PORT(LISP_CONTROL_PORT))
+                       lisp_print(ndo, (const u_char *)(up + 1), length);
+               else if (IS_SRC_OR_DST_PORT(VXLAN_GPE_PORT))
+                       vxlan_gpe_print(ndo, (const u_char *)(up + 1), length);
+               else if (ND_TTEST(((const struct LAP *)cp)->type) &&
+                   ((const struct LAP *)cp)->type == lapDDP &&
+                   (atalk_port(sport) || atalk_port(dport))) {
+                       if (ndo->ndo_vflag)
+                               ND_PRINT((ndo, "kip "));
+                       llap_print(ndo, cp, length);
+               } else {
+                       if (ulen > length)
+                               ND_PRINT((ndo, "UDP, bad length %u > %u",
+                                   ulen, length));
+                       else
+                               ND_PRINT((ndo, "UDP, length %u", ulen));
+               }
+       } else {
+               if (ulen > length)
+                       ND_PRINT((ndo, "UDP, bad length %u > %u",
+                           ulen, length));
                else
                else
-                       (void)printf(" udp %u",
-                           (u_int32_t)(ulen - sizeof(*up)));
-#undef ISPORT
-       } else
-               (void)printf(" udp %u", (u_int32_t)(ulen - sizeof(*up)));
+                       ND_PRINT((ndo, "UDP, length %u", ulen));
+       }
+       return;
+
+trunc:
+       ND_PRINT((ndo, "%s", udp_tstr));
 }
 }
+
+
+/*
+ * Local Variables:
+ * c-style: whitesmith
+ * c-basic-offset: 8
+ * End:
+ */
[mirror] the TCPdump network dissector