static void
parse_input(T_NET_BUF *input)
{
T_PPP_PROTENT *entry;
int_t ix;
uint16_t proto;
NET_COUNT_PPP(net_count_ppp.in_octets, input->len);
NET_COUNT_PPP(net_count_ppp.in_packets, 1);
/* フレーム長をチェックする */
if (input->len < sizeof(T_PPP_HDR)) { /* FreeBSD では PPP_HDRLEN は 4 */
syslog(LOG_NOTICE, "[PPP] recv short frame.");
goto buf_rel;
}
proto = ntohs(*GET_PPP_HDR(input));
/* プロトコルが LCP 以外で、LCP がオープンされていなければエラー */
if (proto != PPP_LCP && lcp_fsm.state != PPP_FSM_OPENED) {
syslog(LOG_NOTICE, "[PPP] LCP not open.");
goto buf_rel;
}
/* リンクが認証状態以前は、LCP、LQR、PAP、CHAP のみ受け付ける */
if (ppp_phase <= PPP_PHASE_AUTHENTICATE &&
!(proto == PPP_LCP || proto == PPP_LQR ||
proto == PPP_PAP || proto == PPP_CHAP)) {
syslog(LOG_NOTICE, "[PPP] disc proto: 0x%04x, phase: %d.", proto, ppp_phase);
goto buf_rel;
}
/* 上位プロトコルの入力関数を呼出す */
for (ix = 0; (entry = protocols[ix]) != NULL; ix ++) {
if (entry->proto == proto && entry->input != NULL) {
(*entry->input)(input);
syscall(rel_net_buf(input));
return;
}
if ((entry->proto & ~0x8000) == proto && entry->datainput != NULL) {
(*entry->datainput)(input);
return;
}
}
syslog(LOG_INFO, "[PPP] unexp proto: 0x%04x.", proto);
lcp_sprotrej(input);
buf_rel:
NET_COUNT_PPP(net_count_ppp.in_err_packets, 1);
syscall(rel_net_buf(input));
}
/*
* get_input - called when incoming data is available.
*/
static void
get_input(void)
{
int len, i;
u_char *p;
u_short protocol;
struct protent *protp;
p = inpacket_buf; /* point to beginning of packet buffer */
len = read_packet(inpacket_buf);
if (len < 0)
return;
if (len == 0) {
etime = time(NULL);
minutes = (etime-stime)/60;
syslog(LOG_NOTICE, "Modem hangup, connected for %d minutes", (minutes >1) ? minutes : 1);
hungup = 1;
lcp_lowerdown(0); /* serial link is no longer available */
link_terminated(0);
return;
}
if (debug /*&& (debugflags & DBG_INPACKET)*/)
log_packet(p, len, "rcvd ", LOG_DEBUG);
if (len < PPP_HDRLEN) {
MAINDEBUG((LOG_INFO, "io(): Received short packet."));
return;
}
p += 2; /* Skip address and control */
GETSHORT(protocol, p);
len -= PPP_HDRLEN;
/*
* Toss all non-LCP packets unless LCP is OPEN.
*/
if (protocol != PPP_LCP && lcp_fsm[0].state != OPENED) {
MAINDEBUG((LOG_INFO,
"get_input: Received non-LCP packet when LCP not open."));
return;
}
/*
* Until we get past the authentication phase, toss all packets
* except LCP, LQR and authentication packets.
*/
if (phase <= PHASE_AUTHENTICATE
&& !(protocol == PPP_LCP || protocol == PPP_LQR
|| protocol == PPP_PAP || protocol == PPP_CHAP)) {
MAINDEBUG((LOG_INFO, "get_input: discarding proto 0x%x in phase %d",
protocol, phase));
return;
}
/*
* Upcall the proper protocol input routine.
*/
for (i = 0; (protp = protocols[i]) != NULL; ++i) {
if (protp->protocol == protocol && protp->enabled_flag) {
(*protp->input)(0, p, len);
return;
}
if (protocol == (protp->protocol & ~0x8000) && protp->enabled_flag
&& protp->datainput != NULL) {
(*protp->datainput)(0, p, len);
return;
}
}
if (debug)
syslog(LOG_WARNING, "Unsupported protocol (0x%x) received", protocol);
lcp_sprotrej(0, p - PPP_HDRLEN, len + PPP_HDRLEN);
}
/*
* get_input - called when incoming data is available.
*/
static void
get_input(void)
{
int len, i;
u_char *p;
u_short protocol;
struct protent *protp;
p = inpacket_buf; /* point to beginning of packet buffer */
len = read_packet(inpacket_buf);
if (len < 0)
return;
if (len == 0) {
notice("Modem hangup");
hungup = 1;
pppd_status = EXIT_HANGUP;
lcp_lowerdown(0); /* serial link is no longer available */
link_terminated(0);
return;
}
if (debug /*&& (debugflags & DBG_INPACKET)*/)
dbglog("rcvd %P", p, len);
if (len < PPP_HDRLEN) {
MAINDEBUG(("io(): Received short packet."));
return;
}
p += 2; /* Skip address and control */
GETSHORT(protocol, p);
len -= PPP_HDRLEN;
/*
* Toss all non-LCP packets unless LCP is OPEN.
*/
if (protocol != PPP_LCP && lcp_fsm[0].state != OPENED) {
MAINDEBUG(("get_input: Received non-LCP packet when LCP not open."));
return;
}
/*
* Until we get past the authentication phase, toss all packets
* except LCP, LQR and authentication packets.
*/
if (pppd_phase <= PHASE_AUTHENTICATE
&& !(protocol == PPP_LCP || protocol == PPP_LQR
|| protocol == PPP_PAP || protocol == PPP_CHAP)) {
MAINDEBUG(("get_input: discarding proto 0x%x in phase %d",
protocol, pppd_phase));
return;
}
/*
* Upcall the proper protocol input routine.
*/
for (i = 0; (protp = protocols[i]) != NULL; ++i) {
if (protp->protocol == protocol && protp->enabled_flag) {
(*protp->input)(0, p, len);
return;
}
if (protocol == (protp->protocol & ~0x8000) && protp->enabled_flag
&& protp->datainput != NULL) {
(*protp->datainput)(0, p, len);
return;
}
}
if (debug) {
const char *pname = protocol_name(protocol);
if (pname != NULL)
warn("Unsupported protocol '%s' (0x%x) received", pname, protocol);
else
warn("Unsupported protocol 0x%x received", protocol);
}
lcp_sprotrej(0, p - PPP_HDRLEN, len + PPP_HDRLEN);
return;
}
