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#include <stdlib.h>
#include <string.h>
#include <linux/ppp_defs.h>
#include <linux/if_ppp.h>
#include <arpa/inet.h>
#include "triton/triton.h"
#include "ppp.h"
#include "ppp_fsm.h"
#include "events.h"
#include "log.h"
char* accomp="allow,disabled";
char* pcomp="allow,disabled";
char* auth="pap,mschap-v2";
char* mppe="allow,disabled";
char* pwdb="radius";
/*
* Options.
*/
#define CI_VENDOR 0 /* Vendor Specific */
#define CI_MRU 1 /* Maximum Receive Unit */
#define CI_ASYNCMAP 2 /* Async Control Character Map */
#define CI_AUTHTYPE 3 /* Authentication Type */
#define CI_QUALITY 4 /* Quality Protocol */
#define CI_MAGICNUMBER 5 /* Magic Number */
#define CI_PCOMPRESSION 7 /* Protocol Field Compression */
#define CI_ACCOMPRESSION 8 /* Address/Control Field Compression */
#define CI_FCSALTERN 9 /* FCS-Alternatives */
#define CI_SDP 10 /* Self-Describing-Pad */
#define CI_NUMBERED 11 /* Numbered-Mode */
#define CI_CALLBACK 13 /* callback */
#define CI_MRRU 17 /* max reconstructed receive unit; multilink */
#define CI_SSNHF 18 /* short sequence numbers for multilink */
#define CI_EPDISC 19 /* endpoint discriminator */
#define CI_MPPLUS 22 /* Multi-Link-Plus-Procedure */
#define CI_LDISC 23 /* Link-Discriminator */
#define CI_LCPAUTH 24 /* LCP Authentication */
#define CI_COBS 25 /* Consistent Overhead Byte Stuffing */
#define CI_PREFELIS 26 /* Prefix Elision */
#define CI_MPHDRFMT 27 /* MP Header Format */
#define CI_I18N 28 /* Internationalization */
#define CI_SDL 29 /* Simple Data Link */
/*static void layer_up(struct ppp_layer_t*);
static void layer_down(struct ppp_layer_t*);
static void layer_started(struct ppp_layer_t*);
static void layer_finished(struct ppp_layer_t*);*/
static void send_conf_req(struct ppp_layer_t*);
static void send_conf_ack(struct ppp_layer_t*);
static void send_conf_nak(struct ppp_layer_t*);
static void send_conf_rej(struct ppp_layer_t*);
static void lcp_recv(struct ppp_layer_t*`);
struct ppp_layer_t* ppp_lcp_init(struct ppp_t *ppp)
{
struct ppp_layer_t *layer=malloc(sizeof(*layer));
memset(layer,0,sizeof(*layer));
layer->proto=PPP_PROTO_LCP;
layer->ppp=ppp;
ppp_fsm_init(layer);
layer->recv=lcp_recv;
layer->send_conf_req=send_conf_req;
layer->send_conf_ack=send_conf_ack;
layer->send_conf_nak=send_conf_nak;
layer->send_conf_rej=send_conf_rej;
ppp_fsm_init(layer);
return layer;
}
/*void ev_ppp_packet(int proto,struct ppp_t *ppp)
{
struct ppp_hdr_t *hdr;
if (proto!=PPP_LCP) return;
if (ppp->in_buf_size-2<PPP_HEADERLEN)
{
log_debug("LCP: short packet received\n");
return;
}
hdr=(struct ppp_hdr_t *)(ppp->in_buf+2);
if (hdr->len<PPP_HEADERLEN)
{
log_debug("LCP: short packet received\n");
return;
}
//ppp_fsm_recv();
}*/
/*static void layer_up(struct ppp_layer_t*)
{
}
static void layer_down(struct ppp_layer_t*)
{
}
static void layer_started(struct ppp_layer_t*)
{
}
static void layer_finished(struct ppp_layer_t*)
{
}*/
static void send_conf_req(struct ppp_layer_t*l)
{
}
static void send_conf_ack(struct ppp_layer_t*l)
{
}
static void send_conf_nak(struct ppp_layer_t*l)
{
}
static void send_conf_rej(struct ppp_layer_t*l)
{
}
static int lcp_recv_conf_req(struct ppp_layer_t*l,u_int8_t *data,int size)
{
struct ppp_opt_t *opt;
while(size)
{
opt=(struct ppp_opt_t *)data;
switch(opt->type)
{
case CI_MRU:
l->options.lcp.mru=*(u_int16_t*)data;
break;
case CI_ASYNCMAP:
break;
case CI_AUTHTYPE:
if (l->ppp->log) log_msg("<auth ");
switch(*(u_int16_t*)data)
{
case PPP_PAP:
if (l->ppp->log) log_msg("pap");
break;
case PPP_EAP:
if (l->ppp->log) log_msg("eap");
break;
case PPP_CHAP:
if (l->ppp->log) log_msg("chap");
break;
/*switch(data[4])
{
case
}*/
default:
if (l->ppp->log) log_msg("unknown");
return -1;
}
if (l->ppp->log) log_msg(" auth>");
case CI_MAGICNUMBER:
if (*(u_int32_t*)data==l->magic_num)
{
log_error("loop detected\n");
return -1;
}
break;
case CI_PCOMPRESSION:
case CI_ACCOMPRESSION:
}
}
return 0;
}
static void lcp_recv(struct ppp_layer_t*l)
{
struct ppp_hdr_t *hdr;
if (l->ppp->in_buf_size-2<PPP_HEADERLEN)
{
log_debug("LCP: short packet received\n");
return;
}
hdr=(struct ppp_hdr_t *)(l->ppp->in_buf+2);
if (hdr->len<PPP_HEADERLEN)
{
log_debug("LCP: short packet received\n");
return;
}
l->recv_id=hdr->id;
switch(hdr->code)
{
case CONFREQ:
if (lcp_recv_conf_req(l,hdr->data,ntohs(hdr->len)-PPP_HDRLEN))
ppp_fsm_recv_conf_req_bad(l);
else
ppp_fsm_recv_conf_req_good(l);
break;
case CONFACK:
lcp_recv_conf_ack(l,hdr->data,ntohs(hdr->len)-PPP_HDRLEN);
ppp_fsm_recv_conf_ack(l);
break;
case CONFNAK:
lcp_recv_conf_nak(l,hdr->data,ntohs(hdr->len)-PPP_HDRLEN);
ppp_fsm_recv_conf_nak(l);
break;
case CONFREJ:
lcp_recv_conf_rej(l,hdr->data,ntohs(hdr->len)-PPP_HDRLEN);
ppp_fsm_recv_conf_rej(l);
break;
case TERMREQ:
ppp_fsm_recv_term_req(l);
break;
case TERMACK:
ppp_fsm_recv_term_ack(l);
break;
case CODEREJ:
ppp_fsm_recv_code_rej_bad(l);
break;
case ECHOREQ:
ppp_fsm_recv_echo_req(l);
break;
case ECHOREP:
lcp_recv_echo_rep(l);
break;
default:
ppp_fsm_recv_unk(l);
break;
}
}
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