__RCSID("$NetBSD: print-tcp.c,v 1.8 2007/07/24 11:53:48 drochner Exp $");
#endif
+#define NETDISSECT_REWORKED
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <tcpdump-stdinc.h>
-#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <openssl/md5.h>
#include <signature.h>
-static int tcp_verify_signature(const struct ip *ip, const struct tcphdr *tp,
+static int tcp_verify_signature(netdissect_options *ndo,
+ const struct ip *ip, const struct tcphdr *tp,
const u_char *data, int length, const u_char *rcvsig);
#endif
-static void print_tcp_rst_data(register const u_char *sp, u_int length);
+static void print_tcp_rst_data(netdissect_options *, register const u_char *sp, u_int length);
#define MAX_RST_DATA_LEN 30
{ 0, NULL }
};
-static int tcp_cksum(register const struct ip *ip,
- register const struct tcphdr *tp,
- register u_int len)
+static int
+tcp_cksum(netdissect_options *ndo,
+ register const struct ip *ip,
+ register const struct tcphdr *tp,
+ register u_int len)
{
- return nextproto4_cksum(ip, (const u_int8_t *)tp, len, len,
+ return nextproto4_cksum(ndo, ip, (const uint8_t *)tp, len, len,
IPPROTO_TCP);
}
void
-tcp_print(register const u_char *bp, register u_int length,
- register const u_char *bp2, int fragmented)
+tcp_print(netdissect_options *ndo,
+ register const u_char *bp, register u_int length,
+ register const u_char *bp2, int fragmented)
{
register const struct tcphdr *tp;
register const struct ip *ip;
register u_char flags;
register u_int hlen;
register char ch;
- u_int16_t sport, dport, win, urp;
- u_int32_t seq, ack, thseq, thack;
+ uint16_t sport, dport, win, urp;
+ uint32_t seq, ack, thseq, thack;
u_int utoval;
- u_int16_t magic;
+ uint16_t magic;
register int rev;
#ifdef INET6
register const struct ip6_hdr *ip6;
ip6 = NULL;
#endif /*INET6*/
ch = '\0';
- if (!TTEST(tp->th_dport)) {
- (void)printf("%s > %s: [|tcp]",
- ipaddr_string(&ip->ip_src),
- ipaddr_string(&ip->ip_dst));
+ if (!ND_TTEST(tp->th_dport)) {
+ ND_PRINT((ndo, "%s > %s: [|tcp]",
+ ipaddr_string(ndo, &ip->ip_src),
+ ipaddr_string(ndo, &ip->ip_dst)));
return;
}
#ifdef INET6
if (ip6) {
if (ip6->ip6_nxt == IPPROTO_TCP) {
- (void)printf("%s.%s > %s.%s: ",
- ip6addr_string(&ip6->ip6_src),
+ ND_PRINT((ndo, "%s.%s > %s.%s: ",
+ ip6addr_string(ndo, &ip6->ip6_src),
tcpport_string(sport),
- ip6addr_string(&ip6->ip6_dst),
- tcpport_string(dport));
+ ip6addr_string(ndo, &ip6->ip6_dst),
+ tcpport_string(dport)));
} else {
- (void)printf("%s > %s: ",
- tcpport_string(sport), tcpport_string(dport));
+ ND_PRINT((ndo, "%s > %s: ",
+ tcpport_string(sport), tcpport_string(dport)));
}
} else
#endif /*INET6*/
{
if (ip->ip_p == IPPROTO_TCP) {
- (void)printf("%s.%s > %s.%s: ",
- ipaddr_string(&ip->ip_src),
+ ND_PRINT((ndo, "%s.%s > %s.%s: ",
+ ipaddr_string(ndo, &ip->ip_src),
tcpport_string(sport),
- ipaddr_string(&ip->ip_dst),
- tcpport_string(dport));
+ ipaddr_string(ndo, &ip->ip_dst),
+ tcpport_string(dport)));
} else {
- (void)printf("%s > %s: ",
- tcpport_string(sport), tcpport_string(dport));
+ ND_PRINT((ndo, "%s > %s: ",
+ tcpport_string(sport), tcpport_string(dport)));
}
}
if (hlen < sizeof(*tp)) {
- (void)printf(" tcp %d [bad hdr length %u - too short, < %lu]",
- length - hlen, hlen, (unsigned long)sizeof(*tp));
+ ND_PRINT((ndo, " tcp %d [bad hdr length %u - too short, < %lu]",
+ length - hlen, hlen, (unsigned long)sizeof(*tp)));
return;
}
- TCHECK(*tp);
+ ND_TCHECK(*tp);
seq = EXTRACT_32BITS(&tp->th_seq);
ack = EXTRACT_32BITS(&tp->th_ack);
win = EXTRACT_16BITS(&tp->th_win);
urp = EXTRACT_16BITS(&tp->th_urp);
- if (qflag) {
- (void)printf("tcp %d", length - hlen);
+ if (ndo->ndo_qflag) {
+ ND_PRINT((ndo, "tcp %d", length - hlen));
if (hlen > length) {
- (void)printf(" [bad hdr length %u - too long, > %u]",
- hlen, length);
+ ND_PRINT((ndo, " [bad hdr length %u - too long, > %u]",
+ hlen, length));
}
return;
}
flags = tp->th_flags;
- printf("Flags [%s]", bittok2str_nosep(tcp_flag_values, "none", flags));
+ ND_PRINT((ndo, "Flags [%s]", bittok2str_nosep(tcp_flag_values, "none", flags)));
- if (!Sflag && (flags & TH_ACK)) {
+ if (!ndo->ndo_Sflag && (flags & TH_ACK)) {
/*
* Find (or record) the initial sequence numbers for
* this conversation. (we pick an arbitrary
thseq = thack = rev = 0;
}
if (hlen > length) {
- (void)printf(" [bad hdr length %u - too long, > %u]",
- hlen, length);
+ ND_PRINT((ndo, " [bad hdr length %u - too long, > %u]",
+ hlen, length));
return;
}
- if (vflag && !Kflag && !fragmented) {
+ if (ndo->ndo_vflag && !ndo->ndo_Kflag && !fragmented) {
/* Check the checksum, if possible. */
- u_int16_t sum, tcp_sum;
+ uint16_t sum, tcp_sum;
if (IP_V(ip) == 4) {
- if (TTEST2(tp->th_sport, length)) {
- sum = tcp_cksum(ip, tp, length);
+ if (ND_TTEST2(tp->th_sport, length)) {
+ sum = tcp_cksum(ndo, ip, tp, length);
tcp_sum = EXTRACT_16BITS(&tp->th_sum);
- (void)printf(", cksum 0x%04x", tcp_sum);
+ ND_PRINT((ndo, ", cksum 0x%04x", tcp_sum));
if (sum != 0)
- (void)printf(" (incorrect -> 0x%04x)",
- in_cksum_shouldbe(tcp_sum, sum));
+ ND_PRINT((ndo, " (incorrect -> 0x%04x)",
+ in_cksum_shouldbe(tcp_sum, sum)));
else
- (void)printf(" (correct)");
+ ND_PRINT((ndo, " (correct)"));
}
}
#ifdef INET6
else if (IP_V(ip) == 6 && ip6->ip6_plen) {
- if (TTEST2(tp->th_sport, length)) {
- sum = nextproto6_cksum(ip6, (const u_int8_t *)tp,
+ if (ND_TTEST2(tp->th_sport, length)) {
+ sum = nextproto6_cksum(ip6, (const uint8_t *)tp,
length, length, IPPROTO_TCP);
tcp_sum = EXTRACT_16BITS(&tp->th_sum);
- (void)printf(", cksum 0x%04x", tcp_sum);
+ ND_PRINT((ndo, ", cksum 0x%04x", tcp_sum));
if (sum != 0)
- (void)printf(" (incorrect -> 0x%04x)",
- in_cksum_shouldbe(tcp_sum, sum));
+ ND_PRINT((ndo, " (incorrect -> 0x%04x)",
+ in_cksum_shouldbe(tcp_sum, sum)));
else
- (void)printf(" (correct)");
+ ND_PRINT((ndo, " (correct)"));
}
}
}
length -= hlen;
- if (vflag > 1 || length > 0 || flags & (TH_SYN | TH_FIN | TH_RST)) {
- (void)printf(", seq %u", seq);
+ if (ndo->ndo_vflag > 1 || length > 0 || flags & (TH_SYN | TH_FIN | TH_RST)) {
+ ND_PRINT((ndo, ", seq %u", seq));
if (length > 0) {
- (void)printf(":%u", seq + length);
+ ND_PRINT((ndo, ":%u", seq + length));
}
}
if (flags & TH_ACK) {
- (void)printf(", ack %u", ack);
+ ND_PRINT((ndo, ", ack %u", ack));
}
- (void)printf(", win %d", win);
+ ND_PRINT((ndo, ", win %d", win));
if (flags & TH_URG)
- (void)printf(", urg %d", urp);
+ ND_PRINT((ndo, ", urg %d", urp));
/*
* Handle any options.
*/
hlen -= sizeof(*tp);
cp = (const u_char *)tp + sizeof(*tp);
- printf(", options [");
+ ND_PRINT((ndo, ", options ["));
while (hlen > 0) {
if (ch != '\0')
- putchar(ch);
- TCHECK(*cp);
+ ND_PRINT((ndo, "%c", ch));
+ ND_TCHECK(*cp);
opt = *cp++;
if (ZEROLENOPT(opt))
len = 1;
else {
- TCHECK(*cp);
+ ND_TCHECK(*cp);
len = *cp++; /* total including type, len */
if (len < 2 || len > hlen)
goto bad;
datalen = 0;
/* Bail if "l" bytes of data are not left or were not captured */
-#define LENCHECK(l) { if ((l) > hlen) goto bad; TCHECK2(*cp, l); }
+#define LENCHECK(l) { if ((l) > hlen) goto bad; ND_TCHECK2(*cp, l); }
- printf("%s", tok2str(tcp_option_values, "unknown-%u", opt));
+ ND_PRINT((ndo, "%s", tok2str(tcp_option_values, "unknown-%u", opt)));
switch (opt) {
case TCPOPT_MAXSEG:
datalen = 2;
LENCHECK(datalen);
- (void)printf(" %u", EXTRACT_16BITS(cp));
+ ND_PRINT((ndo, " %u", EXTRACT_16BITS(cp)));
break;
case TCPOPT_WSCALE:
datalen = 1;
LENCHECK(datalen);
- (void)printf(" %u", *cp);
+ ND_PRINT((ndo, " %u", *cp));
break;
case TCPOPT_SACK:
datalen = len - 2;
if (datalen % 8 != 0) {
- (void)printf("malformed sack");
+ ND_PRINT((ndo, "malformed sack"));
} else {
- u_int32_t s, e;
+ uint32_t s, e;
- (void)printf(" %d ", datalen / 8);
+ ND_PRINT((ndo, " %d ", datalen / 8));
for (i = 0; i < datalen; i += 8) {
LENCHECK(i + 4);
s = EXTRACT_32BITS(cp + i);
s -= thack;
e -= thack;
}
- (void)printf("{%u:%u}", s, e);
+ ND_PRINT((ndo, "{%u:%u}", s, e));
}
}
break;
*/
datalen = 4;
LENCHECK(datalen);
- (void)printf(" %u", EXTRACT_32BITS(cp));
+ ND_PRINT((ndo, " %u", EXTRACT_32BITS(cp)));
break;
case TCPOPT_TIMESTAMP:
datalen = 8;
LENCHECK(datalen);
- (void)printf(" val %u ecr %u",
+ ND_PRINT((ndo, " val %u ecr %u",
EXTRACT_32BITS(cp),
- EXTRACT_32BITS(cp + 4));
+ EXTRACT_32BITS(cp + 4)));
break;
case TCPOPT_SIGNATURE:
datalen = TCP_SIGLEN;
LENCHECK(datalen);
#ifdef HAVE_LIBCRYPTO
- switch (tcp_verify_signature(ip, tp,
+ switch (tcp_verify_signature(ndo, ip, tp,
bp + TH_OFF(tp) * 4, length, cp)) {
case SIGNATURE_VALID:
- (void)printf("valid");
+ ND_PRINT((ndo, "valid"));
break;
case SIGNATURE_INVALID:
- (void)printf("invalid");
+ ND_PRINT((ndo, "invalid"));
break;
case CANT_CHECK_SIGNATURE:
- (void)printf("can't check - ");
+ ND_PRINT((ndo, "can't check - "));
for (i = 0; i < TCP_SIGLEN; ++i)
- (void)printf("%02x", cp[i]);
+ ND_PRINT((ndo, "%02x", cp[i]));
break;
}
#else
for (i = 0; i < TCP_SIGLEN; ++i)
- (void)printf("%02x", cp[i]);
+ ND_PRINT((ndo, "%02x", cp[i]));
#endif
break;
case TCPOPT_AUTH:
- (void)printf("keyid %d", *cp++);
+ ND_PRINT((ndo, "keyid %d", *cp++));
datalen = len - 3;
for (i = 0; i < datalen; ++i) {
LENCHECK(i);
- (void)printf("%02x", cp[i]);
+ ND_PRINT((ndo, "%02x", cp[i]));
}
break;
datalen = 2;
LENCHECK(datalen);
utoval = EXTRACT_16BITS(cp);
- (void)printf("0x%x", utoval);
+ ND_PRINT((ndo, "0x%x", utoval));
if (utoval & 0x0001)
utoval = (utoval >> 1) * 60;
else
utoval >>= 1;
- (void)printf(" %u", utoval);
+ ND_PRINT((ndo, " %u", utoval));
break;
case TCPOPT_MPTCP:
datalen = len - 2;
LENCHECK(datalen);
- if (!mptcp_print(cp-2, len, flags))
+ if (!mptcp_print(ndo, cp-2, len, flags))
goto bad;
break;
goto bad;
/* RFC6994 */
magic = EXTRACT_16BITS(cp);
- (void)printf("-");
+ ND_PRINT((ndo, "-"));
switch(magic) {
/* TCP Fast Open: draft-ietf-tcpm-fastopen-04 */
if (datalen == 2) {
/* Fast Open Cookie Request */
- (void)printf("tfo cookiereq");
+ ND_PRINT((ndo, "tfo cookiereq"));
} else {
/* Fast Open Cookie */
if (datalen % 2 != 0 || datalen < 6 || datalen > 18) {
- (void)printf("tfo malformed");
+ ND_PRINT((ndo, "tfo malformed"));
} else {
- (void)printf("tfo cookie ");
+ ND_PRINT((ndo, "tfo cookie "));
for (i = 2; i < datalen; ++i)
- (void)printf("%02x", cp[i]);
+ ND_PRINT((ndo, "%02x", cp[i]));
}
}
break;
default:
/* Unknown magic number */
- (void)printf("%04x", magic);
+ ND_PRINT((ndo, "%04x", magic));
break;
}
break;
default:
datalen = len - 2;
if (datalen)
- printf(" 0x");
+ ND_PRINT((ndo, " 0x"));
for (i = 0; i < datalen; ++i) {
LENCHECK(i);
- (void)printf("%02x", cp[i]);
+ ND_PRINT((ndo, "%02x", cp[i]));
}
break;
}
if (!ZEROLENOPT(opt))
++datalen; /* size octet */
if (datalen != len)
- (void)printf("[len %d]", len);
+ ND_PRINT((ndo, "[len %d]", len));
ch = ',';
if (opt == TCPOPT_EOL)
break;
}
- putchar(']');
+ ND_PRINT((ndo, "]"));
}
/*
* Print length field before crawling down the stack.
*/
- printf(", length %u", length);
+ ND_PRINT((ndo, ", length %u", length));
if (length <= 0)
return;
* Decode payload if necessary.
*/
bp += TH_OFF(tp) * 4;
- if ((flags & TH_RST) && vflag) {
- print_tcp_rst_data(bp, length);
+ if ((flags & TH_RST) && ndo->ndo_vflag) {
+ print_tcp_rst_data(ndo, bp, length);
return;
}
- if (packettype) {
- switch (packettype) {
+ if (ndo->ndo_packettype) {
+ switch (ndo->ndo_packettype) {
case PT_ZMTP1:
- zmtp1_print(gndo, bp, length);
+ zmtp1_print(ndo, bp, length);
break;
}
return;
}
if (sport == TELNET_PORT || dport == TELNET_PORT) {
- if (!qflag && vflag)
- telnet_print(gndo, bp, length);
+ if (!ndo->ndo_qflag && ndo->ndo_vflag)
+ telnet_print(ndo, bp, length);
} else if (sport == BGP_PORT || dport == BGP_PORT)
- bgp_print(bp, length);
+ bgp_print(ndo, bp, length);
else if (sport == PPTP_PORT || dport == PPTP_PORT)
- pptp_print(bp);
+ pptp_print(ndo, bp);
#ifdef TCPDUMP_DO_SMB
else if (sport == NETBIOS_SSN_PORT || dport == NETBIOS_SSN_PORT)
- nbt_tcp_print(bp, length);
+ nbt_tcp_print(ndo, bp, length);
else if (sport == SMB_PORT || dport == SMB_PORT)
- smb_tcp_print(bp, length);
+ smb_tcp_print(ndo, bp, length);
#endif
else if (sport == BEEP_PORT || dport == BEEP_PORT)
- beep_print(gndo, bp, length);
- else if (sport == OPENFLOW_PORT || dport == OPENFLOW_PORT)
- openflow_print(gndo, bp, length);
+ beep_print(ndo, bp, length);
+ else if (sport == OPENFLOW_PORT_OLD || dport == OPENFLOW_PORT_OLD ||
+ sport == OPENFLOW_PORT_IANA || dport == OPENFLOW_PORT_IANA)
+ openflow_print(ndo, bp, length);
else if (length > 2 &&
(sport == NAMESERVER_PORT || dport == NAMESERVER_PORT ||
sport == MULTICASTDNS_PORT || dport == MULTICASTDNS_PORT)) {
* TCP DNS query has 2byte length at the head.
* XXX packet could be unaligned, it can go strange
*/
- ns_print(bp + 2, length - 2, 0);
+ ns_print(ndo, bp + 2, length - 2, 0);
} else if (sport == MSDP_PORT || dport == MSDP_PORT) {
- msdp_print(gndo, bp, length);
+ msdp_print(ndo, bp, length);
} else if (sport == RPKI_RTR_PORT || dport == RPKI_RTR_PORT) {
- rpki_rtr_print(gndo, bp, length);
+ rpki_rtr_print(ndo, bp, length);
}
else if (length > 0 && (sport == LDP_PORT || dport == LDP_PORT)) {
- ldp_print(bp, length);
+ ldp_print(ndo, bp, length);
}
else if ((sport == NFS_PORT || dport == NFS_PORT) &&
- length >= 4 && TTEST2(*bp, 4)) {
+ length >= 4 && ND_TTEST2(*bp, 4)) {
/*
* If data present, header length valid, and NFS port used,
* assume NFS.
* Pass offset of data plus 4 bytes for RPC TCP msg length
* to NFS print routines.
*/
- u_int32_t fraglen;
+ uint32_t fraglen;
register struct sunrpc_msg *rp;
enum sunrpc_msg_type direction;
if (fraglen > (length) - 4)
fraglen = (length) - 4;
rp = (struct sunrpc_msg *)(bp + 4);
- if (TTEST(rp->rm_direction)) {
+ if (ND_TTEST(rp->rm_direction)) {
direction = (enum sunrpc_msg_type)EXTRACT_32BITS(&rp->rm_direction);
if (dport == NFS_PORT && direction == SUNRPC_CALL) {
- (void)printf(": NFS request xid %u ", EXTRACT_32BITS(&rp->rm_xid));
- nfsreq_print_noaddr((u_char *)rp, fraglen, (u_char *)ip);
+ ND_PRINT((ndo, ": NFS request xid %u ", EXTRACT_32BITS(&rp->rm_xid)));
+ nfsreq_print_noaddr(ndo, (u_char *)rp, fraglen, (u_char *)ip);
return;
}
if (sport == NFS_PORT && direction == SUNRPC_REPLY) {
- (void)printf(": NFS reply xid %u ", EXTRACT_32BITS(&rp->rm_xid));
- nfsreply_print_noaddr((u_char *)rp, fraglen, (u_char *)ip);
+ ND_PRINT((ndo, ": NFS reply xid %u ", EXTRACT_32BITS(&rp->rm_xid)));
+ nfsreply_print_noaddr(ndo, (u_char *)rp, fraglen, (u_char *)ip);
return;
}
}
return;
bad:
- fputs("[bad opt]", stdout);
+ ND_PRINT((ndo, "[bad opt]"));
if (ch != '\0')
- putchar('>');
+ ND_PRINT((ndo, ">"));
return;
trunc:
- fputs("[|tcp]", stdout);
+ ND_PRINT((ndo, "[|tcp]"));
if (ch != '\0')
- putchar('>');
+ ND_PRINT((ndo, ">"));
}
/*
*/
static void
-print_tcp_rst_data(register const u_char *sp, u_int length)
+print_tcp_rst_data(netdissect_options *ndo,
+ register const u_char *sp, u_int length)
{
int c;
- if (TTEST2(*sp, length))
- printf(" [RST");
- else
- printf(" [!RST");
+ ND_PRINT((ndo, ND_TTEST2(*sp, length) ? " [RST" : " [!RST"));
if (length > MAX_RST_DATA_LEN) {
length = MAX_RST_DATA_LEN; /* can use -X for longer */
- putchar('+'); /* indicate we truncate */
+ ND_PRINT((ndo, "+")); /* indicate we truncate */
}
- putchar(' ');
- while (length-- && sp <= snapend) {
+ ND_PRINT((ndo, " "));
+ while (length-- && sp <= ndo->ndo_snapend) {
c = *sp++;
- safeputchar(c);
+ safeputchar(ndo, c);
}
- putchar(']');
+ ND_PRINT((ndo, "]"));
}
#ifdef HAVE_LIBCRYPTO
USES_APPLE_DEPRECATED_API
static int
-tcp_verify_signature(const struct ip *ip, const struct tcphdr *tp,
+tcp_verify_signature(netdissect_options *ndo,
+ const struct ip *ip, const struct tcphdr *tp,
const u_char *data, int length, const u_char *rcvsig)
{
struct tcphdr tp1;
u_char sig[TCP_SIGLEN];
char zero_proto = 0;
MD5_CTX ctx;
- u_int16_t savecsum, tlen;
+ uint16_t savecsum, tlen;
#ifdef INET6
struct ip6_hdr *ip6;
- u_int32_t len32;
- u_int8_t nxt;
+ uint32_t len32;
+ uint8_t nxt;
#endif
- if (data + length > snapend) {
- printf("snaplen too short, ");
+ if (data + length > ndo->ndo_snapend) {
+ ND_PRINT((ndo, "snaplen too short, "));
return (CANT_CHECK_SIGNATURE);
}
tp1 = *tp;
- if (sigsecret == NULL) {
- printf("shared secret not supplied with -M, ");
+ if (ndo->ndo_sigsecret == NULL) {
+ ND_PRINT((ndo, "shared secret not supplied with -M, "));
return (CANT_CHECK_SIGNATURE);
}
#endif
} else {
#ifdef INET6
- printf("IP version not 4 or 6, ");
+ ND_PRINT((ndo, "IP version not 4 or 6, "));
#else
- printf("IP version not 4, ");
+ ND_PRINT((ndo, "IP version not 4, "));
#endif
return (CANT_CHECK_SIGNATURE);
}
/*
* Step 4: Update MD5 hash with shared secret.
*/
- MD5_Update(&ctx, sigsecret, strlen(sigsecret));
+ MD5_Update(&ctx, ndo->ndo_sigsecret, strlen(ndo->ndo_sigsecret));
MD5_Final(sig, &ctx);
if (memcmp(rcvsig, sig, TCP_SIGLEN) == 0)
projects / tcpdump / blobdiff