#ifndef lint
static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-udp.c,v 1.73 2000-04-27 11:09:08 itojun Exp $ (LBL)";
+ "@(#) $Header: /tcpdump/master/tcpdump/print-udp.c,v 1.89 2000-11-17 19:08:16 itojun Exp $ (LBL)";
#endif
#ifdef HAVE_CONFIG_H
#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>
-#ifdef NOERROR
-#undef NOERROR /* Solaris sucks */
-#endif
-#ifdef T_UNSPEC
-#undef T_UNSPEC /* SINIX does too */
-#endif
-#include <arpa/nameser.h>
#ifdef SEGSIZE
#undef SEGSIZE
#endif
#include <rpc/rpc.h>
#include <stdio.h>
-
-#ifdef INET6
-#include <netinet/ip6.h>
-#endif
+#include <string.h>
#include "interface.h"
#include "addrtoname.h"
#include "appletalk.h"
+#include "udp.h"
+
+#include "ip.h"
+#ifdef INET6
+#include "ip6.h"
+#endif
+
+#ifdef NOERROR
+#undef NOERROR /* Solaris sucks */
+#endif
+#ifdef T_UNSPEC
+#undef T_UNSPEC /* SINIX does too */
+#endif
+#include "nameser.h"
#include "nfs.h"
#include "bootp.h"
i0 & 0xffff,
i1);
if (vflag) {
- printf(" %u", i1);
+ printf(" %u", (u_int32_t)ntohl(((u_int *)hdr)[2]));
if (hasopt) {
u_int i2, optlen;
do {
return (hdr + len);
}
+static int udp_cksum(register const struct ip *ip,
+ register const struct udphdr *up,
+ register int len)
+{
+ int i, tlen;
+ union phu {
+ struct phdr {
+ u_int32_t src;
+ u_int32_t dst;
+ u_char mbz;
+ u_char proto;
+ u_int16_t len;
+ } ph;
+ u_int16_t pa[6];
+ } phu;
+ register const u_int16_t *sp;
+ u_int32_t sum;
+ tlen = ntohs(ip->ip_len) - ((const char *)up-(const char*)ip);
+
+ /* pseudo-header.. */
+ phu.ph.len = htons(tlen);
+ phu.ph.mbz = 0;
+ phu.ph.proto = IPPROTO_UDP;
+ memcpy(&phu.ph.src, &ip->ip_src.s_addr, sizeof(u_int32_t));
+ memcpy(&phu.ph.dst, &ip->ip_dst.s_addr, sizeof(u_int32_t));
+
+ sp = &phu.pa[0];
+ sum = sp[0]+sp[1]+sp[2]+sp[3]+sp[4]+sp[5];
+
+ sp = (const u_int16_t *)up;
+
+ for (i=0; i<(tlen&~1); i+= 2)
+ sum += *sp++;
+
+ if (tlen & 1) {
+ sum += htons( (*(const char *)sp) << 8);
+ }
+
+ while (sum > 0xffff)
+ sum = (sum & 0xffff) + (sum >> 16);
+ sum = ~sum & 0xffff;
+
+ return (sum);
+}
+
+#ifdef INET6
+static int udp6_cksum(const struct ip6_hdr *ip6, const struct udphdr *up,
+ int len)
+{
+ int i, tlen;
+ register const u_int16_t *sp;
+ u_int32_t sum;
+ union {
+ struct {
+ struct in6_addr ph_src;
+ struct in6_addr ph_dst;
+ u_int32_t ph_len;
+ u_int8_t ph_zero[3];
+ u_int8_t ph_nxt;
+ } ph;
+ u_int16_t pa[20];
+ } phu;
+
+ tlen = ntohs(ip6->ip6_plen) + sizeof(struct ip6_hdr) -
+ ((const char *)up - (const char*)ip6);
+
+ /* pseudo-header */
+ memset(&phu, 0, sizeof(phu));
+ phu.ph.ph_src = ip6->ip6_src;
+ phu.ph.ph_dst = ip6->ip6_dst;
+ phu.ph.ph_len = htonl(tlen);
+ phu.ph.ph_nxt = IPPROTO_UDP;
+
+ sum = 0;
+ for (i = 0; i < sizeof(phu.pa) / sizeof(phu.pa[0]); i++)
+ sum += phu.pa[i];
+
+ sp = (const u_int16_t *)up;
+
+ for (i = 0; i < (tlen & ~1); i += 2)
+ sum += *sp++;
+
+ if (tlen & 1)
+ sum += htons((*(const char *)sp) << 8);
+
+ while (sum > 0xffff)
+ sum = (sum & 0xffff) + (sum >> 16);
+ sum = ~sum & 0xffff;
+
+ return (sum);
+}
+#endif
+
+
/* XXX probably should use getservbyname() and cache answers */
#define TFTP_PORT 69 /*XXX*/
#define KERBEROS_PORT 88 /*XXX*/
#define NTP_PORT 123 /*XXX*/
#define SNMPTRAP_PORT 162 /*XXX*/
#define ISAKMP_PORT 500 /*XXX*/
+#define TIMED_PORT 525 /*XXX*/
#define RIP_PORT 520 /*XXX*/
#define KERBEROS_SEC_PORT 750 /*XXX*/
#define L2TP_PORT 1701 /*XXX*/
#define NETBIOS_NS_PORT 137
#define NETBIOS_DGRAM_PORT 138
#define CISCO_AUTORP_PORT 496 /*XXX*/
+#define RADIUS_PORT 1645
+#define RADIUS_NEW_PORT 1812
+#define RADIUS_ACCOUNTING_PORT 1646
+#define RADIUS_NEW_ACCOUNTING_PORT 1813
#ifdef INET6
#define RIPNG_PORT 521 /*XXX*/
#endif
void
-udp_print(register const u_char *bp, u_int length, register const u_char *bp2)
+udp_print(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;
up = (struct udphdr *)bp;
ip = (struct ip *)bp2;
#ifdef INET6
- if (ip->ip_v == 6)
+ if (IP_V(ip) == 6)
ip6 = (struct ip6_hdr *)bp2;
else
ip6 = NULL;
sport = ntohs(up->uh_sport);
dport = ntohs(up->uh_dport);
ulen = ntohs(up->uh_ulen);
+ if (ulen < 8) {
+ (void)printf("%s > %s: truncated-udplength %d",
+ ipaddr_string(&ip->ip_src),
+ ipaddr_string(&ip->ip_dst),
+ ulen);
+ return;
+ }
if (packettype) {
register struct rpc_msg *rp;
enum msg_type direction;
(atalk_port(sport) || atalk_port(dport))) {
if (vflag)
fputs("kip ", stdout);
- atalk_print(cp, length);
+ llap_print(cp, length);
return;
}
}
}
#endif
+ if (IP_V(ip) == 4 && vflag && !fragmented) {
+ int sum = up->uh_sum;
+ if (sum == 0) {
+ (void)printf(" [no cksum]");
+ } else if (TTEST2(cp[0], length)) {
+ sum = udp_cksum(ip, up, length);
+ if (sum != 0)
+ (void)printf(" [bad udp cksum %x!]", sum);
+ else
+ (void)printf(" [udp sum ok]");
+ }
+ }
+#ifdef INET6
+ if (IP_V(ip) == 6 && ip6->ip6_plen && vflag && !fragmented) {
+ int sum = up->uh_sum;
+ /* for IPv6, UDP checksum is mandatory */
+ if (TTEST2(cp[0], length)) {
+ sum = udp6_cksum(ip6, up, length);
+ if (sum != 0)
+ (void)printf(" [bad udp cksum %x!]", sum);
+ else
+ (void)printf(" [udp sum ok]");
+ }
+ }
+#endif
+
if (!qflag) {
#define ISPORT(p) (dport == (p) || sport == (p))
if (ISPORT(NAMESERVER_PORT))
ns_print((const u_char *)(up + 1), length);
+ else if (ISPORT(TIMED_PORT))
+ timed_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))
wb_print((const void *)(up + 1), length);
else if (ISPORT(CISCO_AUTORP_PORT))
cisco_autorp_print((const void *)(up + 1), length);
+ else if (ISPORT(RADIUS_PORT) ||
+ ISPORT(RADIUS_NEW_PORT) ||
+ ISPORT(RADIUS_ACCOUNTING_PORT) ||
+ ISPORT(RADIUS_NEW_ACCOUNTING_PORT) )
+ radius_print((const u_char *)(up+1), length);
else
(void)printf(" udp %u",
(u_int32_t)(ulen - sizeof(*up)));
projects / tcpdump / blobdiff