static int tcp_cksum(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,
IPPROTO_TCP);
}
static int tcp_cksum(__capability const struct ip *ip,
__capability const struct tcphdr *tp,
register u_int len)
{
return (nextproto4_cksum(ip, (packetbody_t)tp, len,
IPPROTO_TCP));
}
static int
tcp_cksum(netdissect_options *ndo,
register const struct ip *ip,
register const struct tcphdr *tp,
register u_int len)
{
return nextproto4_cksum(ndo, ip, (const uint8_t *)tp, len, len,
IPPROTO_TCP);
}
static int dccp_cksum(netdissect_options *ndo, const struct ip *ip,
const struct dccp_hdr *dh, u_int len)
{
return nextproto4_cksum(ndo, ip, (const u_int8_t *)(void *)dh, len,
dccp_csum_coverage(dh, len), IPPROTO_DCCP);
}
void
vrrp_print(netdissect_options *ndo,
register const u_char *bp, register u_int len,
register const u_char *bp2, int ttl)
{
int version, type, auth_type = VRRP_AUTH_NONE; /* keep compiler happy */
const char *type_s;
ND_TCHECK(bp[0]);
version = (bp[0] & 0xf0) >> 4;
type = bp[0] & 0x0f;
type_s = tok2str(type2str, "unknown type (%u)", type);
ND_PRINT((ndo, "VRRPv%u, %s", version, type_s));
if (ttl != 255)
ND_PRINT((ndo, ", (ttl %u)", ttl));
if (version < 2 || version > 3 || type != VRRP_TYPE_ADVERTISEMENT)
return;
ND_TCHECK(bp[2]);
ND_PRINT((ndo, ", vrid %u, prio %u", bp[1], bp[2]));
ND_TCHECK(bp[5]);
if (version == 2) {
auth_type = bp[4];
ND_PRINT((ndo, ", authtype %s", tok2str(auth2str, NULL, auth_type)));
ND_PRINT((ndo, ", intvl %us, length %u", bp[5], len));
} else { /* version == 3 */
uint16_t intvl = (bp[4] & 0x0f) << 8 | bp[5];
ND_PRINT((ndo, ", intvl %ucs, length %u", intvl, len));
}
if (ndo->ndo_vflag) {
int naddrs = bp[3];
int i;
char c;
if (version == 2 && ND_TTEST2(bp[0], len)) {
struct cksum_vec vec[1];
vec[0].ptr = bp;
vec[0].len = len;
if (in_cksum(vec, 1))
ND_PRINT((ndo, ", (bad vrrp cksum %x)",
EXTRACT_16BITS(&bp[6])));
}
if (version == 3 && ND_TTEST2(bp[0], len)) {
uint16_t cksum = nextproto4_cksum(ndo, (struct ip *)bp2, bp,
len, len, IPPROTO_VRRP);
if (cksum)
ND_PRINT((ndo, ", (bad vrrp cksum %x)",
EXTRACT_16BITS(&bp[6])));
}
ND_PRINT((ndo, ", addrs"));
if (naddrs > 1)
ND_PRINT((ndo, "(%d)", naddrs));
ND_PRINT((ndo, ":"));
c = ' ';
bp += 8;
for (i = 0; i < naddrs; i++) {
ND_TCHECK(bp[3]);
ND_PRINT((ndo, "%c%s", c, ipaddr_string(ndo, bp)));
c = ',';
bp += 4;
}
if (version == 2 && auth_type == VRRP_AUTH_SIMPLE) { /* simple text password */
ND_TCHECK(bp[7]);
ND_PRINT((ndo, " auth \""));
if (fn_printn(ndo, bp, 8, ndo->ndo_snapend)) {
ND_PRINT((ndo, "\""));
goto trunc;
}
ND_PRINT((ndo, "\""));
}
}
return;
trunc:
ND_PRINT((ndo, "[|vrrp]"));
}
static int dccp_cksum(const struct ip *ip,
const struct dccp_hdr *dh, u_int len)
{
return nextproto4_cksum(ip, (const u_int8_t *)(void *)dh,
dccp_csum_coverage(dh, len), IPPROTO_DCCP);
}
