/*
* By default, print the packet out in hex.
*/
void
default_print(register const u_char *bp, register u_int length)
{
register const u_short *sp;
register u_int i;
register int nshorts;
if ((long)bp & 1) {
default_print_unaligned(bp, length);
return;
}
sp = (u_short *)bp;
nshorts = (u_int) length / sizeof(u_short);
i = 0;
while (--nshorts >= 0) {
if ((i++ % 8) == 0)
(void)printf("\n\t");
(void)printf(" %04x", ntohs(*sp++));
}
if (length & 1) {
if ((i % 8) == 0)
(void)printf("\n\t");
(void)printf(" %02x", *(u_char *)sp);
}
}
void
isoclns_print(const u_char *p, u_int length, u_int caplen,
const u_char *esrc, const u_char *edst)
{
if (caplen < 1) {
printf("[|iso-clns] ");
if (!eflag)
printf("%s > %s",
etheraddr_string(esrc),
etheraddr_string(edst));
return;
}
switch (*p) {
case CLNS:
/* esis_print(&p, &length); */
printf("iso-clns");
if (!eflag)
(void)printf(" %s > %s",
etheraddr_string(esrc),
etheraddr_string(edst));
break;
case ESIS:
printf("iso-esis");
if (!eflag)
(void)printf(" %s > %s",
etheraddr_string(esrc),
etheraddr_string(edst));
esis_print(p, length);
return;
case ISIS:
printf("iso-isis");
if (!eflag)
(void)printf(" %s > %s",
etheraddr_string(esrc),
etheraddr_string(edst));
/* isis_print(&p, &length); */
(void)printf(" len=%d ", length);
if (caplen > 1)
default_print_unaligned(p, caplen);
break;
case NULLNS:
printf("iso-nullns");
if (!eflag)
(void)printf(" %s > %s",
etheraddr_string(esrc),
etheraddr_string(edst));
break;
default:
printf("iso-clns %02x", p[0]);
if (!eflag)
(void)printf(" %s > %s",
etheraddr_string(esrc),
etheraddr_string(edst));
(void)printf(" len=%d ", length);
if (caplen > 1)
default_print_unaligned(p, caplen);
break;
}
}
/*
* Returns non-zero IFF it succeeds in printing the header
*/
int
llc_print(const u_char *p, u_int length, u_int caplen,
const u_char *esrc, const u_char *edst)
{
struct llc llc;
register u_short et;
register int ret;
if (caplen < 3) {
(void)printf("[|llc]");
default_print((u_char *)p, caplen);
return(0);
}
/* Watch out for possible alignment problems */
memcpy((char *)&llc, (char *)p, min(caplen, sizeof(llc)));
if (llc.ssap == LLCSAP_GLOBAL && llc.dsap == LLCSAP_GLOBAL) {
ipx_print(p, length);
return (1);
}
#ifdef notyet
else if (p[0] == 0xf0 && p[1] == 0xf0)
netbios_print(p, length);
#endif
if (llc.ssap == LLCSAP_ISONS && llc.dsap == LLCSAP_ISONS
&& llc.llcui == LLC_UI) {
isoclns_print(p + 3, length - 3, caplen - 3, esrc, edst);
return (1);
}
if (llc.ssap == LLCSAP_SNAP && llc.dsap == LLCSAP_SNAP
&& llc.llcui == LLC_UI) {
if (caplen < sizeof(llc)) {
(void)printf("[|llc-snap]");
default_print((u_char *)p, caplen);
return (0);
}
if (vflag)
(void)printf("snap %s ", protoid_string(llc.llcpi));
caplen -= sizeof(llc);
length -= sizeof(llc);
p += sizeof(llc);
/* This is an encapsulated Ethernet packet */
et = EXTRACT_16BITS(&llc.ethertype[0]);
ret = ether_encap_print(et, p, length, caplen);
if (ret)
return (ret);
}
if ((llc.ssap & ~LLC_GSAP) == llc.dsap) {
if (eflag)
(void)printf("%s ", llcsap_string(llc.dsap));
else
(void)printf("%s > %s %s ",
etheraddr_string(esrc),
etheraddr_string(edst),
llcsap_string(llc.dsap));
} else {
if (eflag)
(void)printf("%s > %s ",
llcsap_string(llc.ssap & ~LLC_GSAP),
llcsap_string(llc.dsap));
else
(void)printf("%s %s > %s %s ",
etheraddr_string(esrc),
llcsap_string(llc.ssap & ~LLC_GSAP),
etheraddr_string(edst),
llcsap_string(llc.dsap));
}
if ((llc.llcu & LLC_U_FMT) == LLC_U_FMT) {
const char *m;
char f;
m = tok2str(cmd2str, "%02x", LLC_U_CMD(llc.llcu));
switch ((llc.ssap & LLC_GSAP) | (llc.llcu & LLC_U_POLL)) {
case 0: f = 'C'; break;
case LLC_GSAP: f = 'R'; break;
case LLC_U_POLL: f = 'P'; break;
case LLC_GSAP|LLC_U_POLL: f = 'F'; break;
default: f = '?'; break;
}
printf("%s/%c", m, f);
p += 3;
length -= 3;
caplen -= 3;
if ((llc.llcu & ~LLC_U_POLL) == LLC_XID) {
if (*p == LLC_XID_FI) {
printf(": %02x %02x", p[1], p[2]);
p += 3;
length -= 3;
caplen -= 3;
}
}
} else {
char f;
llc.llcis = ntohs(llc.llcis);
switch ((llc.ssap & LLC_GSAP) | (llc.llcu & LLC_U_POLL)) {
case 0: f = 'C'; break;
case LLC_GSAP: f = 'R'; break;
case LLC_U_POLL: f = 'P'; break;
case LLC_GSAP|LLC_U_POLL: f = 'F'; break;
default: f = '?'; break;
}
if ((llc.llcu & LLC_S_FMT) == LLC_S_FMT) {
static char *llc_s[] = { "rr", "rej", "rnr", "03" };
(void)printf("%s (r=%d,%c)",
llc_s[LLC_S_CMD(llc.llcis)],
LLC_IS_NR(llc.llcis),
f);
} else {
(void)printf("I (s=%d,r=%d,%c)",
LLC_I_NS(llc.llcis),
LLC_IS_NR(llc.llcis),
f);
}
p += 4;
length -= 4;
caplen -= 4;
}
(void)printf(" len=%d", length);
if (caplen > 0) {
default_print_unaligned(p, caplen);
}
return(1);
}
