* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
-#ifndef lint
-static const char rcsid[] _U_ =
- "@(#) $Header: /tcpdump/master/tcpdump/print-sl.c,v 1.65 2005-04-06 21:32:42 mcr Exp $ (LBL)";
-#endif
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
+/* \summary: Compressed Serial Line Internet Protocol printer */
-#include <tcpdump-stdinc.h>
+#include <config.h>
-#include <pcap.h>
-#include <stdio.h>
+#include "netdissect-stdinc.h"
-#include "interface.h"
-#include "addrtoname.h"
-#include "extract.h" /* must come after interface.h */
+#define ND_LONGJMP_FROM_TCHECK
+#include "netdissect.h"
+#include "extract.h"
#include "ip.h"
#include "tcp.h"
-#include "slip.h"
#include "slcompress.h"
+/*
+ * definitions of the pseudo- link-level header attached to slip
+ * packets grabbed by the packet filter (bpf) traffic monitor.
+ */
+#define SLIP_HDRLEN 16
+
+#define SLX_DIR 0
+#define SLX_CHDR 1
+
+#define SLIPDIR_IN 0
+#define SLIPDIR_OUT 1
+
+
static u_int lastlen[2][256];
static u_int lastconn = 255;
-static void sliplink_print(const u_char *, const struct ip *, u_int);
-static void compressed_sl_print(const u_char *, const struct ip *, u_int, int);
+static void sliplink_print(netdissect_options *, const u_char *, const struct ip *, u_int);
+static void compressed_sl_print(netdissect_options *, const u_char *, const struct ip *, u_int, int);
-u_int
-sl_if_print(const struct pcap_pkthdr *h, const u_char *p)
+void
+sl_if_print(netdissect_options *ndo,
+ const struct pcap_pkthdr *h, const u_char *p)
{
- register u_int caplen = h->caplen;
- register u_int length = h->len;
- register const struct ip *ip;
+ u_int length = h->len;
+ const struct ip *ip;
- if (caplen < SLIP_HDRLEN) {
- printf("[|slip]");
- return (caplen);
- }
+ ndo->ndo_protocol = "slip";
+ ND_TCHECK_LEN(p, SLIP_HDRLEN);
+ ndo->ndo_ll_hdr_len += SLIP_HDRLEN;
length -= SLIP_HDRLEN;
- ip = (struct ip *)(p + SLIP_HDRLEN);
+ ip = (const struct ip *)(p + SLIP_HDRLEN);
- if (eflag)
- sliplink_print(p, ip, length);
+ if (ndo->ndo_eflag)
+ sliplink_print(ndo, p, ip, length);
switch (IP_V(ip)) {
case 4:
- ip_print(gndo, (u_char *)ip, length);
+ ip_print(ndo, (const u_char *)ip, length);
break;
-#ifdef INET6
case 6:
- ip6_print(gndo, (u_char *)ip, length);
+ ip6_print(ndo, (const u_char *)ip, length);
break;
-#endif
default:
- printf ("ip v%d", IP_V(ip));
+ ND_PRINT("ip v%u", IP_V(ip));
}
-
- return (SLIP_HDRLEN);
}
-u_int
-sl_bsdos_if_print(const struct pcap_pkthdr *h, const u_char *p)
+void
+sl_bsdos_if_print(netdissect_options *ndo,
+ const struct pcap_pkthdr *h, const u_char *p)
{
- register u_int caplen = h->caplen;
- register u_int length = h->len;
- register const struct ip *ip;
+ u_int length = h->len;
+ const struct ip *ip;
- if (caplen < SLIP_HDRLEN) {
- printf("[|slip]");
- return (caplen);
- }
+ ndo->ndo_protocol = "slip_bsdos";
+ ND_TCHECK_LEN(p, SLIP_HDRLEN);
+ ndo->ndo_ll_hdr_len += SLIP_HDRLEN;
length -= SLIP_HDRLEN;
- ip = (struct ip *)(p + SLIP_HDRLEN);
+ ip = (const struct ip *)(p + SLIP_HDRLEN);
#ifdef notdef
- if (eflag)
- sliplink_print(p, ip, length);
+ if (ndo->ndo_eflag)
+ sliplink_print(ndo, p, ip, length);
#endif
- ip_print(gndo, (u_char *)ip, length);
-
- return (SLIP_HDRLEN);
+ ip_print(ndo, (const u_char *)ip, length);
}
static void
-sliplink_print(register const u_char *p, register const struct ip *ip,
- register u_int length)
+sliplink_print(netdissect_options *ndo,
+ const u_char *p, const struct ip *ip,
+ u_int length)
{
int dir;
u_int hlen;
- dir = p[SLX_DIR];
- putchar(dir == SLIPDIR_IN ? 'I' : 'O');
- putchar(' ');
+ dir = GET_U_1(p + SLX_DIR);
+ switch (dir) {
- if (nflag) {
- /* XXX just dump the header */
- register int i;
+ case SLIPDIR_IN:
+ ND_PRINT("I ");
+ break;
- for (i = SLX_CHDR; i < SLX_CHDR + CHDR_LEN - 1; ++i)
- printf("%02x.", p[i]);
- printf("%02x: ", p[SLX_CHDR + CHDR_LEN - 1]);
- return;
+ case SLIPDIR_OUT:
+ ND_PRINT("O ");
+ break;
+
+ default:
+ ND_PRINT("Invalid direction %d ", dir);
+ dir = -1;
+ break;
}
- switch (p[SLX_CHDR] & 0xf0) {
+ switch (GET_U_1(p + SLX_CHDR) & 0xf0) {
case TYPE_IP:
- printf("ip %d: ", length + SLIP_HDRLEN);
+ ND_PRINT("ip %u: ", length + SLIP_HDRLEN);
break;
case TYPE_UNCOMPRESSED_TCP:
* Get it from the link layer since sl_uncompress_tcp()
* has restored the IP header copy to IPPROTO_TCP.
*/
- lastconn = ((struct ip *)&p[SLX_CHDR])->ip_p;
+ lastconn = GET_U_1(((const struct ip *)(p + SLX_CHDR))->ip_p);
+ ND_PRINT("utcp %u: ", lastconn);
+ if (dir == -1) {
+ /* Direction is bogus, don't use it */
+ return;
+ }
hlen = IP_HL(ip);
- hlen += TH_OFF((struct tcphdr *)&((int *)ip)[hlen]);
+ hlen += TH_OFF((const struct tcphdr *)&((const int *)ip)[hlen]);
lastlen[dir][lastconn] = length - (hlen << 2);
- printf("utcp %d: ", lastconn);
break;
default:
- if (p[SLX_CHDR] & TYPE_COMPRESSED_TCP) {
- compressed_sl_print(&p[SLX_CHDR], ip,
- length, dir);
- printf(": ");
+ if (dir == -1) {
+ /* Direction is bogus, don't use it */
+ return;
+ }
+ if (GET_U_1(p + SLX_CHDR) & TYPE_COMPRESSED_TCP) {
+ compressed_sl_print(ndo, p + SLX_CHDR, ip, length, dir);
+ ND_PRINT(": ");
} else
- printf("slip-%d!: ", p[SLX_CHDR]);
+ ND_PRINT("slip-%u!: ", GET_U_1(p + SLX_CHDR));
}
}
static const u_char *
-print_sl_change(const char *str, register const u_char *cp)
+print_sl_change(netdissect_options *ndo,
+ const char *str, const u_char *cp)
{
- register u_int i;
+ u_int i;
- if ((i = *cp++) == 0) {
- i = EXTRACT_16BITS(cp);
+ if ((i = GET_U_1(cp)) == 0) {
+ cp++;
+ i = GET_BE_U_2(cp);
cp += 2;
}
- printf(" %s%d", str, i);
+ ND_PRINT(" %s%u", str, i);
return (cp);
}
static const u_char *
-print_sl_winchange(register const u_char *cp)
+print_sl_winchange(netdissect_options *ndo,
+ const u_char *cp)
{
- register short i;
+ int16_t i;
- if ((i = *cp++) == 0) {
- i = EXTRACT_16BITS(cp);
+ if ((i = GET_U_1(cp)) == 0) {
+ cp++;
+ i = GET_BE_S_2(cp);
cp += 2;
}
if (i >= 0)
- printf(" W+%d", i);
+ ND_PRINT(" W+%d", i);
else
- printf(" W%d", i);
+ ND_PRINT(" W%d", i);
return (cp);
}
static void
-compressed_sl_print(const u_char *chdr, const struct ip *ip,
- u_int length, int dir)
+compressed_sl_print(netdissect_options *ndo,
+ const u_char *chdr, const struct ip *ip,
+ u_int length, int dir)
{
- register const u_char *cp = chdr;
- register u_int flags, hlen;
+ const u_char *cp = chdr;
+ u_int flags, hlen;
- flags = *cp++;
+ flags = GET_U_1(cp);
+ cp++;
if (flags & NEW_C) {
- lastconn = *cp++;
- printf("ctcp %d", lastconn);
+ lastconn = GET_U_1(cp);
+ cp++;
+ ND_PRINT("ctcp %u", lastconn);
} else
- printf("ctcp *");
+ ND_PRINT("ctcp *");
/* skip tcp checksum */
cp += 2;
switch (flags & SPECIALS_MASK) {
case SPECIAL_I:
- printf(" *SA+%d", lastlen[dir][lastconn]);
+ ND_PRINT(" *SA+%u", lastlen[dir][lastconn]);
break;
case SPECIAL_D:
- printf(" *S+%d", lastlen[dir][lastconn]);
+ ND_PRINT(" *S+%u", lastlen[dir][lastconn]);
break;
default:
if (flags & NEW_U)
- cp = print_sl_change("U=", cp);
+ cp = print_sl_change(ndo, "U=", cp);
if (flags & NEW_W)
- cp = print_sl_winchange(cp);
+ cp = print_sl_winchange(ndo, cp);
if (flags & NEW_A)
- cp = print_sl_change("A+", cp);
+ cp = print_sl_change(ndo, "A+", cp);
if (flags & NEW_S)
- cp = print_sl_change("S+", cp);
+ cp = print_sl_change(ndo, "S+", cp);
break;
}
if (flags & NEW_I)
- cp = print_sl_change("I+", cp);
+ cp = print_sl_change(ndo, "I+", cp);
/*
* 'hlen' is the length of the uncompressed TCP/IP header (in words).
* 'length - hlen' is the amount of data in the packet.
*/
hlen = IP_HL(ip);
- hlen += TH_OFF((struct tcphdr *)&((int32_t *)ip)[hlen]);
+ hlen += TH_OFF((const struct tcphdr *)&((const int32_t *)ip)[hlen]);
lastlen[dir][lastconn] = length - (hlen << 2);
- printf(" %d (%ld)", lastlen[dir][lastconn], (long)(cp - chdr));
+ ND_PRINT(" %u (%ld)", lastlen[dir][lastconn], (long)(cp - chdr));
}
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