static void
npppd_iface_network_input_ipv4(npppd_iface *_this, u_char *pktp, int lpktp)
{
struct ip *iphdr;
npppd *_npppd;
npppd_ppp *ppp;
struct npppd_iface_network_input_arg input_arg;
NPPPD_IFACE_ASSERT(_this != NULL);
NPPPD_IFACE_ASSERT(pktp != NULL);
iphdr = (struct ip *)pktp;
_npppd = _this->npppd;
if (lpktp < sizeof(iphdr)) {
npppd_iface_log(_this, LOG_ERR, "Received short packet.");
return;
}
if (IN_MULTICAST(ntohl(iphdr->ip_dst.s_addr))) {
NPPPD_IFACE_ASSERT(((npppd *)(_this->npppd))->rd != NULL);
input_arg._this = _this;
input_arg.pktp = pktp;
input_arg.lpktp = lpktp;
/* delegate */
rd_walktree(((npppd *)(_this->npppd))->rd,
npppd_iface_network_input_delegate, &input_arg);
return;
}
ppp = npppd_get_ppp_by_ip(_npppd, iphdr->ip_dst);
if (ppp == NULL) {
#ifdef NPPPD_DEBUG
log_printf(LOG_INFO, "%s received a packet to unknown "
"%s.", _this->ifname, inet_ntoa(iphdr->ip_dst));
#endif
return;
}
#ifndef NO_ADJUST_MSS
if (ppp->adjust_mss) {
adjust_tcp_mss(pktp, lpktp, MRU_IPMTU(ppp->peer_mru));
}
#endif
if (ppp->timeout_sec > 0 && !ip_is_idle_packet(iphdr, lpktp))
ppp_reset_idle_timeout(ppp);
#ifdef USE_NPPPD_MPPE
if (MPPE_SEND_READY(ppp)) {
/* output via MPPE if MPPE started */
mppe_pkt_output(&ppp->mppe, PPP_PROTO_IP, pktp, lpktp);
return;
} else if (MPPE_IS_REQUIRED(ppp)) {
/* in case MPPE not started but MPPE is mandatory */
ppp_log(ppp, LOG_WARNING, "A packet received from network, "
"but MPPE is not started.");
return;
}
#endif
ppp_output(ppp, PPP_PROTO_IP, 0, 0, pktp, lpktp);
}
/** This function is called when IPCP is opened */
void
ppp_ipcp_opened(npppd_ppp *_this)
{
time_t curr_time;
curr_time = get_monosec();
npppd_set_ip_enabled(_this->pppd, _this, 1);
if (_this->logged_acct_start == 0) {
char label[512], ipstr[64];
ppp_set_tunnel_label(_this, label, sizeof(label));
strlcpy(ipstr, " ip=", sizeof(ipstr));
strlcat(ipstr, inet_ntoa(_this->ppp_framed_ip_address),
sizeof(ipstr));
if (_this->ppp_framed_ip_netmask.s_addr != 0xffffffffL) {
strlcat(ipstr, ":", sizeof(ipstr));
strlcat(ipstr, inet_ntoa(_this->ppp_framed_ip_netmask),
sizeof(ipstr));
}
ppp_log(_this, LOG_NOTICE,
"logtype=TUNNELSTART user=\"%s\" duration=%lusec layer2=%s "
"layer2from=%s auth=%s %s iface=%s%s",
_this->username[0]? _this->username : "******",
(long)(curr_time - _this->start_monotime),
_this->phy_label, label,
_this->username[0]? ppp_peer_auth_string(_this) : "none",
ipstr, npppd_ppp_get_iface_name(_this->pppd, _this),
(_this->lcp.dialin_proxy != 0)? " dialin_proxy=yes" : ""
);
#ifdef USE_NPPPD_RADIUS
npppd_ppp_radius_acct_start(_this->pppd, _this);
#endif
_this->logged_acct_start = 1;
ppp_reset_idle_timeout(_this);
}
#ifdef USE_NPPPD_PIPEX
ppp_on_network_pipex(_this);
#endif
}