/*
* Print dhcp6 packets
*/
void
dhcp6_print(netdissect_options *ndo,
const u_char *cp, u_int length)
{
const struct dhcp6 *dh6;
const struct dhcp6_relay *dh6relay;
uint8_t msgtype;
const u_char *ep;
const u_char *extp;
const char *name;
ND_PRINT("dhcp6");
ep = ndo->ndo_snapend;
if (cp + length < ep)
ep = cp + length;
dh6 = (const struct dhcp6 *)cp;
dh6relay = (const struct dhcp6_relay *)cp;
ND_TCHECK_4(dh6->dh6_msgtypexid.xid);
msgtype = EXTRACT_U_1(dh6->dh6_msgtypexid.msgtype);
name = tok2str(dh6_msgtype_str, "msgtype-%u", msgtype);
if (!ndo->ndo_vflag) {
ND_PRINT(" %s", name);
return;
}
/* XXX relay agent messages have to be handled differently */
ND_PRINT(" %s (", name); /*)*/
if (msgtype != DH6_RELAY_FORW && msgtype != DH6_RELAY_REPLY) {
ND_PRINT("xid=%x",
EXTRACT_BE_U_4(dh6->dh6_msgtypexid.xid) & DH6_XIDMASK);
extp = (const u_char *)(dh6 + 1);
dhcp6opt_print(ndo, extp, ep);
} else { /* relay messages */
ND_TCHECK_16(dh6relay->dh6relay_peeraddr);
ND_PRINT("linkaddr=%s", ip6addr_string(ndo, dh6relay->dh6relay_linkaddr));
ND_PRINT(" peeraddr=%s", ip6addr_string(ndo, dh6relay->dh6relay_peeraddr));
dhcp6opt_print(ndo, (const u_char *)(dh6relay + 1), ep);
}
/*(*/
ND_PRINT(")");
return;
trunc:
ND_PRINT("[|dhcp6]");
}
static void
print_attr_address6(netdissect_options *ndo,
const u_char *data, u_int length, u_short attr_code _U_)
{
if (length != 16)
{
ND_PRINT("ERROR: length %u != 16", length);
return;
}
ND_TCHECK_16(data);
ND_PRINT("%s", ip6addr_string(ndo, data));
return;
trunc:
nd_print_trunc(ndo);
}
static int
ahcp_ipv6_addresses_print(netdissect_options *ndo, const u_char *cp, const u_char *ep)
{
const char *sep = ": ";
while (cp < ep) {
if (cp + 16 > ep)
goto invalid;
ND_TCHECK_16(cp);
ND_PRINT("%s%s", sep, ip6addr_string(ndo, cp));
cp += 16;
sep = ", ";
}
return 0;
invalid:
ND_PRINT("%s", istr);
ND_TCHECK_LEN(cp, ep - cp);
return 0;
trunc:
nd_print_trunc(ndo);
return -1;
}
