void
egp_print(netdissect_options *ndo,
const uint8_t *bp, u_int length)
{
const struct egp_packet *egp;
u_int version;
u_int type;
u_int code;
u_int status;
ndo->ndo_protocol = "egp";
egp = (const struct egp_packet *)bp;
if (length < sizeof(*egp) || !ND_TTEST_SIZE(egp)) {
ND_PRINT("[|egp]");
return;
}
version = EXTRACT_U_1(egp->egp_version);
if (!ndo->ndo_vflag) {
ND_PRINT("EGPv%u, AS %u, seq %u, length %u",
version,
EXTRACT_BE_U_2(egp->egp_as),
EXTRACT_BE_U_2(egp->egp_sequence),
length);
return;
} else
ND_PRINT("EGPv%u, length %u",
version,
length);
if (version != EGP_VERSION) {
ND_PRINT("[version %u]", version);
return;
}
type = EXTRACT_U_1(egp->egp_type);
code = EXTRACT_U_1(egp->egp_code);
status = EXTRACT_U_1(egp->egp_status);
switch (type) {
case EGPT_ACQUIRE:
ND_PRINT(" acquire");
switch (code) {
case EGPC_REQUEST:
case EGPC_CONFIRM:
ND_PRINT(" %s", egp_acquire_codes[code]);
switch (status) {
case EGPS_UNSPEC:
case EGPS_ACTIVE:
case EGPS_PASSIVE:
ND_PRINT(" %s", egp_acquire_status[status]);
break;
default:
ND_PRINT(" [status %u]", status);
break;
}
ND_PRINT(" hello:%u poll:%u",
EXTRACT_BE_U_2(egp->egp_hello),
EXTRACT_BE_U_2(egp->egp_poll));
break;
case EGPC_REFUSE:
case EGPC_CEASE:
case EGPC_CEASEACK:
ND_PRINT(" %s", egp_acquire_codes[code]);
switch (status ) {
case EGPS_UNSPEC:
case EGPS_NORES:
case EGPS_ADMIN:
case EGPS_GODOWN:
case EGPS_PARAM:
case EGPS_PROTO:
ND_PRINT(" %s", egp_acquire_status[status]);
break;
default:
ND_PRINT("[status %u]", status);
break;
}
break;
default:
ND_PRINT("[code %u]", code);
break;
}
break;
case EGPT_REACH:
switch (code) {
case EGPC_HELLO:
case EGPC_HEARDU:
ND_PRINT(" %s", egp_reach_codes[code]);
if (status <= EGPS_DOWN)
ND_PRINT(" state:%s", egp_status_updown[status]);
else
ND_PRINT(" [status %u]", status);
break;
default:
ND_PRINT("[reach code %u]", code);
break;
}
break;
case EGPT_POLL:
ND_PRINT(" poll");
if (status <= EGPS_DOWN)
ND_PRINT(" state:%s", egp_status_updown[status]);
else
ND_PRINT(" [status %u]", status);
ND_PRINT(" net:%s", ipaddr_string(ndo, egp->egp_sourcenet));
break;
case EGPT_UPDATE:
ND_PRINT(" update");
if (status & EGPS_UNSOL) {
status &= ~EGPS_UNSOL;
ND_PRINT(" unsolicited");
}
if (status <= EGPS_DOWN)
ND_PRINT(" state:%s", egp_status_updown[status]);
else
ND_PRINT(" [status %u]", status);
ND_PRINT(" %s int %u ext %u",
ipaddr_string(ndo, egp->egp_sourcenet),
EXTRACT_U_1(egp->egp_intgw),
EXTRACT_U_1(egp->egp_extgw));
if (ndo->ndo_vflag)
egpnrprint(ndo, egp, length);
break;
case EGPT_ERROR:
ND_PRINT(" error");
if (status <= EGPS_DOWN)
ND_PRINT(" state:%s", egp_status_updown[status]);
else
ND_PRINT(" [status %u]", status);
if (EXTRACT_BE_U_2(egp->egp_reason) <= EGPR_UVERSION)
ND_PRINT(" %s", egp_reasons[EXTRACT_BE_U_2(egp->egp_reason)]);
else
ND_PRINT(" [reason %u]", EXTRACT_BE_U_2(egp->egp_reason));
break;
default:
ND_PRINT("[type %u]", type);
break;
}
}
void
_egp_print(netdissect_options *ndo,
register const uint8_t *bp, register u_int length)
{
register const struct egp_packet *egp;
register int status;
register int code;
register int type;
egp = (struct egp_packet *)bp;
if (!ND_TTEST2(*egp, length)) {
ND_PRINT((ndo, "[|egp]"));
return;
}
if (!ndo->ndo_vflag) {
ND_PRINT((ndo, "EGPv%u, AS %u, seq %u, length %u",
egp->egp_version,
EXTRACT_16BITS(&egp->egp_as),
EXTRACT_16BITS(&egp->egp_sequence),
length));
return;
} else
ND_PRINT((ndo, "EGPv%u, length %u",
egp->egp_version,
length));
if (egp->egp_version != EGP_VERSION) {
ND_PRINT((ndo, "[version %d]", egp->egp_version));
return;
}
type = egp->egp_type;
code = egp->egp_code;
status = egp->egp_status;
switch (type) {
case EGPT_ACQUIRE:
ND_PRINT((ndo, " acquire"));
switch (code) {
case EGPC_REQUEST:
case EGPC_CONFIRM:
ND_PRINT((ndo, " %s", egp_acquire_codes[code]));
switch (status) {
case EGPS_UNSPEC:
case EGPS_ACTIVE:
case EGPS_PASSIVE:
ND_PRINT((ndo, " %s", egp_acquire_status[status]));
break;
default:
ND_PRINT((ndo, " [status %d]", status));
break;
}
ND_PRINT((ndo, " hello:%d poll:%d",
EXTRACT_16BITS(&egp->egp_hello),
EXTRACT_16BITS(&egp->egp_poll)));
break;
case EGPC_REFUSE:
case EGPC_CEASE:
case EGPC_CEASEACK:
ND_PRINT((ndo, " %s", egp_acquire_codes[code]));
switch (status ) {
case EGPS_UNSPEC:
case EGPS_NORES:
case EGPS_ADMIN:
case EGPS_GODOWN:
case EGPS_PARAM:
case EGPS_PROTO:
ND_PRINT((ndo, " %s", egp_acquire_status[status]));
break;
default:
ND_PRINT((ndo, "[status %d]", status));
break;
}
break;
default:
ND_PRINT((ndo, "[code %d]", code));
break;
}
break;
case EGPT_REACH:
switch (code) {
case EGPC_HELLO:
case EGPC_HEARDU:
ND_PRINT((ndo, " %s", egp_reach_codes[code]));
if (status <= EGPS_DOWN)
ND_PRINT((ndo, " state:%s", egp_status_updown[status]));
else
ND_PRINT((ndo, " [status %d]", status));
break;
default:
ND_PRINT((ndo, "[reach code %d]", code));
break;
}
break;
case EGPT_POLL:
ND_PRINT((ndo, " poll"));
if (egp->egp_status <= EGPS_DOWN)
ND_PRINT((ndo, " state:%s", egp_status_updown[status]));
else
ND_PRINT((ndo, " [status %d]", status));
ND_PRINT((ndo, " net:%s", ipaddr_string(ndo, &egp->egp_sourcenet)));
break;
case EGPT_UPDATE:
ND_PRINT((ndo, " update"));
if (status & EGPS_UNSOL) {
status &= ~EGPS_UNSOL;
ND_PRINT((ndo, " unsolicited"));
}
if (status <= EGPS_DOWN)
ND_PRINT((ndo, " state:%s", egp_status_updown[status]));
else
ND_PRINT((ndo, " [status %d]", status));
ND_PRINT((ndo, " %s int %d ext %d",
ipaddr_string(ndo, &egp->egp_sourcenet),
egp->egp_intgw,
egp->egp_extgw));
if (ndo->ndo_vflag)
egpnrprint(ndo, egp);
break;
case EGPT_ERROR:
ND_PRINT((ndo, " error"));
if (status <= EGPS_DOWN)
ND_PRINT((ndo, " state:%s", egp_status_updown[status]));
else
ND_PRINT((ndo, " [status %d]", status));
if (EXTRACT_16BITS(&egp->egp_reason) <= EGPR_UVERSION)
ND_PRINT((ndo, " %s", egp_reasons[EXTRACT_16BITS(&egp->egp_reason)]));
else
ND_PRINT((ndo, " [reason %d]", EXTRACT_16BITS(&egp->egp_reason)));
break;
default:
ND_PRINT((ndo, "[type %d]", type));
break;
}
}