/*
* upap_input - Input UPAP packet.
*/
static void
upap_input(int unit, u_char *inpacket, int l)
{
upap_state *u = &upap[unit];
u_char *inp;
u_char code, id;
int len;
/*
* Parse header (code, id and length).
* If packet too short, drop it.
*/
inp = inpacket;
if (l < (int)UPAP_HEADERLEN) {
UPAPDEBUG(LOG_INFO, ("pap_input: rcvd short header.\r\n"));
return;
}
GETCHAR(code, inp);
GETCHAR(id, inp);
GETSHORT(len, inp);
if (len < (int)UPAP_HEADERLEN) {
UPAPDEBUG(LOG_INFO, ("pap_input: rcvd illegal length.\r\n"));
return;
}
if (len > l) {
UPAPDEBUG(LOG_INFO, ("pap_input: rcvd short packet.\r\n"));
return;
}
len -= UPAP_HEADERLEN;
/*
* Action depends on code.
*/
switch (code) {
case UPAP_AUTHREQ:
upap_rauthreq(u, inp, id, len);
break;
case UPAP_AUTHACK:
upap_rauthack(u, inp, id, len);
break;
case UPAP_AUTHNAK:
upap_rauthnak(u, inp, id, len);
break;
default: /* XXX Need code reject */
UPAPDEBUG(LOG_INFO, ("pap_input: UNHANDLED default: code: %d, id: %d, len: %d.\r\n", code, id, len));
break;
}
}
static void
upap_input (T_NET_BUF *input)
{
T_PPP_CP_HDR *hdr;
NET_COUNT_PPP_PAP(net_count_ppp_upap_in_octets, input->len);
NET_COUNT_PPP_PAP(net_count_ppp_upap_in_packets, 1);
/* PPP リンク制御 (CP) ヘッダより短ければエラー */
if (input->len < (sizeof(T_PPP_HDR) + sizeof(T_PPP_CP_HDR))) {
syslog(LOG_WARNING, "[PPP/PAP] short hdr: %d.", input->len);
return;
}
hdr = GET_PPP_CP_HDR(input);
/* ヘッダの長さと入力データサイズが一致しなければエラー */
if (hdr->len != input->len - sizeof(T_PPP_HDR)) {
syslog(LOG_WARNING, "[PPP/PAP] bad len: %d.", hdr->len);
return;
}
/*
* 制御コードにより適当な関数を呼出す
*/
switch (hdr->code) {
#ifdef AUTH_CFG_CLIENT
case PAP_AUTHACK:
upap_rauthack();
break;
case PAP_AUTHNAK:
upap_rauthnak();
break;
#endif /* of #ifdef AUTH_CFG_CLIENT */
#ifdef AUTH_CFG_SERVER
case PAP_AUTHREQ:
upap_rauthreq(input);
break;
#endif /* of #ifdef AUTH_CFG_SERVER */
}
}
/*
* upap_input - Input UPAP packet.
*/
static void upap_input(ppp_pcb *pcb, u_char *inpacket, int l) {
u_char *inp;
u_char code, id;
int len;
/*
* Parse header (code, id and length).
* If packet too short, drop it.
*/
inp = inpacket;
if (l < UPAP_HEADERLEN) {
UPAPDEBUG(("pap_input: rcvd short header."));
return;
}
GETCHAR(code, inp);
GETCHAR(id, inp);
GETSHORT(len, inp);
if (len < UPAP_HEADERLEN) {
UPAPDEBUG(("pap_input: rcvd illegal length."));
return;
}
if (len > l) {
UPAPDEBUG(("pap_input: rcvd short packet."));
return;
}
len -= UPAP_HEADERLEN;
/*
* Action depends on code.
*/
switch (code) {
case UPAP_AUTHREQ:
#if PPP_SERVER
upap_rauthreq(pcb, inp, id, len);
#endif /* PPP_SERVER */
break;
case UPAP_AUTHACK:
upap_rauthack(pcb, inp, id, len);
break;
case UPAP_AUTHNAK:
upap_rauthnak(pcb, inp, id, len);
break;
default: /* XXX Need code reject */
break;
}
}
