static void
sliplink_print(register const u_char *p, register const struct ip *ip,
register u_int length)
{
int dir;
u_int hlen;
dir = p[SLX_DIR];
putchar(dir == SLIPDIR_IN ? 'I' : 'O');
putchar(' ');
if (nflag) {
/* XXX just dump the header */
register int i;
for (i = SLX_CHDR; i < SLX_CHDR + CHDR_LEN - 1; ++i)
printf("%02x.", p[i]);
printf("%02x: ", p[SLX_CHDR + CHDR_LEN - 1]);
return;
}
switch (p[SLX_CHDR] & 0xf0) {
case TYPE_IP:
printf("ip %d: ", length + SLIP_HDRLEN);
break;
case TYPE_UNCOMPRESSED_TCP:
/*
* The connection id is stored in the IP protocol field.
* 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;
hlen = ip->ip_hl;
hlen += ((struct tcphdr *)&((int *)ip)[hlen])->th_off;
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(": ");
} else
printf("slip-%d!: ", p[SLX_CHDR]);
}
}
static void
sliplink_print(netdissect_options *ndo,
register const u_char *p, register const struct ip *ip,
register u_int length)
{
int dir;
u_int hlen;
dir = p[SLX_DIR];
ND_PRINT((ndo, dir == SLIPDIR_IN ? "I " : "O "));
if (ndo->ndo_nflag) {
/* XXX just dump the header */
register int i;
for (i = SLX_CHDR; i < SLX_CHDR + CHDR_LEN - 1; ++i)
ND_PRINT((ndo, "%02x.", p[i]));
ND_PRINT((ndo, "%02x: ", p[SLX_CHDR + CHDR_LEN - 1]));
return;
}
switch (p[SLX_CHDR] & 0xf0) {
case TYPE_IP:
ND_PRINT((ndo, "ip %d: ", length + SLIP_HDRLEN));
break;
case TYPE_UNCOMPRESSED_TCP:
/*
* The connection id is stored in the IP protocol field.
* 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;
hlen = IP_HL(ip);
hlen += TH_OFF((struct tcphdr *)&((int *)ip)[hlen]);
lastlen[dir][lastconn] = length - (hlen << 2);
ND_PRINT((ndo, "utcp %d: ", lastconn));
break;
default:
if (p[SLX_CHDR] & TYPE_COMPRESSED_TCP) {
compressed_sl_print(ndo, &p[SLX_CHDR], ip,
length, dir);
ND_PRINT((ndo, ": "));
} else
ND_PRINT((ndo, "slip-%d!: ", p[SLX_CHDR]));
}
}