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mirror of https://git.FreeBSD.org/src.git synced 2024-12-24 11:29:10 +00:00
freebsd/contrib/tcpdump/print-udp.c
1996-10-17 21:16:07 +00:00

408 lines
10 KiB
C

/*
* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior
* written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
static char rcsid[] =
"@(#) $Header: print-udp.c,v 1.55 96/07/23 14:17:28 leres Exp $ (LBL)";
#endif
#include <sys/param.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet/udp.h>
#include <netinet/udp_var.h>
#undef NOERROR /* Solaris sucks */
#undef T_UNSPEC /* SINIX does too */
#include <arpa/nameser.h>
#include <arpa/tftp.h>
#include <rpc/rpc.h>
#include <stdio.h>
#include "interface.h"
#include "addrtoname.h"
#include "appletalk.h"
#include "nfs.h"
#include "bootp.h"
struct rtcphdr {
u_short rh_flags; /* T:2 P:1 CNT:5 PT:8 */
u_short rh_len; /* length of message (in bytes) */
u_int rh_ssrc; /* synchronization src id */
};
typedef struct {
u_int upper; /* more significant 32 bits */
u_int lower; /* less significant 32 bits */
} ntp64;
/*
* Sender report.
*/
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 */
};
/*
* Receiver report.
* Time stamps are middle 32-bits of ntp timestamp.
*/
struct rtcp_rr {
u_int rr_srcid; /* sender being reported */
u_int rr_nr; /* no. packets received */
u_int rr_np; /* no. packets predicted */
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 */
};
/*XXX*/
#define RTCP_PT_SR 0
#define RTCP_PT_RR 1
#define RTCP_PT_SDES 2
#define RTCP_SDES_CNAME 1
#define RTCP_SDES_NAME 2
#define RTCP_SDES_EMAIL 3
#define RTCP_SDES_PHONE 4
#define RTCP_SDES_LOC 5
#define RTCP_SDES_TOOL 6
#define RTCP_SDES_TXT 7
#define RTCP_PT_BYE 3
#define RTCP_PT_APP 4
static void
vat_print(const void *hdr, u_int len, register const struct udphdr *up)
{
/* vat/vt audio */
u_int ts = *(u_short *)hdr;
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);
} 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),
i0 & 0xffff,
i1, i0 & 0x800000? "*" : "");
/* audio format */
if (i0 & 0x1f0000)
printf(" f%d", (i0 >> 16) & 0x1f);
if (i0 & 0x3f000000)
printf(" s%d", (i0 >> 24) & 0x3f);
}
}
static void
rtp_print(const void *hdr, u_int len, register const struct udphdr *up)
{
/* rtp v1 or v2 */
u_int *ip = (u_int *)hdr;
u_int hasopt, 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 char* ptype;
ip += 2;
len >>= 2;
len -= 2;
if ((i0 >> 30) == 1) {
/* rtp v1 */
hasopt = i0 & 0x800000;
contype = (i0 >> 16) & 0x3f;
hasmarker = i0 & 0x400000;
ptype = "rtpv1";
} else { /*XXX*/
/* rtp v2 */
hasopt = i0 & 0x20000000;
contype = (i0 >> 16) & 0x7f;
hasmarker = i0 & 0x800000;
dlen -= 4;
ptype = "rtp";
ip += 1;
len -= 1;
}
printf(" udp/%s %d c%d %s%s %d",
ptype,
dlen,
contype,
hasopt? "+" : "",
hasmarker? "*" : "",
i0 & 0xffff);
if (vflag) {
if (hasopt) {
u_int i2, optlen;
do {
i2 = ip[0];
optlen = (i2 >> 16) & 0xff;
if (optlen == 0 || optlen > len) {
printf(" !opt");
return;
}
ip += optlen;
} while ((int)i2 >= 0);
}
if (contype == 0x1f)
printf(" 0x%04x", ip[0] >> 16);
printf(" %u", i1);
}
}
static const u_char*
rtcp_print(const u_char *hdr)
{
/* rtp v2 control (rtcp) */
struct rtcp_rr* rr = 0;
struct rtcp_sr* sr;
struct rtcphdr* rh = (struct rtcphdr*)hdr;
u_int len = (ntohs(rh->rh_len) + 1) * 4;
u_short flags = ntohs(rh->rh_flags);
int cnt = (flags >> 8) & 0x1f;
double ts, dts, jitter;
if (vflag)
printf(" %u", (u_int32_t)ntohl(rh->rh_ssrc));
switch (flags & 0xff) {
case RTCP_PT_SR:
sr = (struct rtcp_sr*)(rh + 1);
printf(" sr");
if (len != cnt * sizeof(*rr) + sizeof(*sr) + sizeof(*rh))
printf(" [%d]", len);
ts = (double)((u_int32_t)ntohl(sr->sr_ts)) / 65536.;
printf(" @%.2f %up %ub", ts, (u_int32_t)ntohl(sr->sr_np),
(u_int32_t)ntohl(sr->sr_nb));
rr = (struct rtcp_rr*)(sr + 1);
break;
case RTCP_PT_RR:
printf(" rr");
if (len != cnt * sizeof(*rr) + sizeof(*rh))
printf(" [%d]", len);
rr = (struct rtcp_rr*)(rh + 1);
break;
case RTCP_PT_SDES:
printf(" sdes %d", len);
cnt = 0;
break;
case RTCP_PT_BYE:
printf(" bye %d", len);
cnt = 0;
break;
default:
printf(" type-0x%x %d", flags & 0xff, len);
cnt = 0;
break;
}
if (cnt > 1)
printf(" c%d", cnt);
while (--cnt >= 0) {
if ((u_char*)(rr + 1) > snapend) {
printf(" [|rtcp]");
return (snapend);
}
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.;
jitter = (double)((u_int32_t)ntohl(rr->rr_dv)) / 65536.;
printf(" %ur %ue %.2fj @%.2f+%.2f",
(u_int32_t)ntohl(rr->rr_nr),
(u_int32_t)ntohl(rr->rr_np),
jitter, ts, dts);
}
return (hdr + len);
}
/* 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*/
void
udp_print(register const u_char *bp, u_int length, register const u_char *bp2)
{
register const struct udphdr *up;
register const struct ip *ip;
register const u_char *cp;
u_short sport, dport, ulen;
up = (struct udphdr *)bp;
ip = (struct ip *)bp2;
cp = (u_char *)(up + 1);
if (cp > snapend) {
printf("[|udp]");
return;
}
if (length < sizeof(struct udphdr)) {
(void)printf(" truncated-udp %d", length);
return;
}
length -= sizeof(struct udphdr);
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;
switch (packettype) {
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);
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);
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);
else
nfsreply_print((u_char *)rp, length,
(u_char *)ip); /*XXX*/
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);
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));
while (cp < snapend)
cp = rtcp_print(cp);
break;
}
return;
}
if (! qflag) {
register struct rpc_msg *rp;
enum msg_type direction;
rp = (struct rpc_msg *)(up + 1);
TCHECK(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);
return;
}
else if (sport == NFS_PORT && direction == REPLY) {
nfsreply_print((u_char *)rp, length, (u_char *)ip);
return;
}
#ifdef notdef
else if (dport == SUNRPC_PORT && direction == CALL) {
sunrpcrequest_print((u_char *)rp, length, (u_char *)ip);
return;
}
#endif
else {
TCHECK2(cp[0], 1);
if (((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 (dport == 3456)
vat_print((const void *)(up + 1), length, up);
/*
* Kludge in test for whiteboard packets.
*/
else if (dport == 4567)
wb_print((const void *)(up + 1), length);
else
(void)printf(" udp %u",
(u_int32_t)(ulen - sizeof(*up)));
#undef ISPORT
} else
(void)printf(" udp %u", (u_int32_t)(ulen - sizeof(*up)));
return;
trunc:
fputs("[|udp]", stdout);
}