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#include <arpa/inet.h>
#include <stdlib.h>
#include "triton.h"
#include "ppp.h"
#include "ppp_fsm.h"
#include "ppp_lcp.h"
#include "log.h"
static int conf_max_terminate = 2;
static int conf_max_configure = 5;
static int conf_max_failure = 5;
static int conf_timeout = 3;
void send_term_req(struct ppp_fsm_t *layer);
void send_term_ack(struct ppp_fsm_t *layer);
void send_echo_reply(struct ppp_fsm_t *layer);
static void init_req_counter(struct ppp_fsm_t *layer,int timeout);
static void zero_req_counter(struct ppp_fsm_t *layer);
static void restart_timer_func(struct triton_timer_t *t);
static void stop_timer(struct ppp_fsm_t *fsm);
void ppp_fsm_init(struct ppp_fsm_t *layer)
{
layer->fsm_state = FSM_Initial;
layer->restart_timer.expire = restart_timer_func;
layer->restart_counter = 0;
layer->max_terminate = conf_max_terminate;
layer->max_configure = conf_max_configure;
layer->max_failure = conf_max_failure;
layer->timeout = conf_timeout;
}
void ppp_fsm_free(struct ppp_fsm_t *layer)
{
stop_timer(layer);
}
int ppp_fsm_lower_up(struct ppp_fsm_t *layer)
{
switch(layer->fsm_state)
{
case FSM_Initial:
layer->fsm_state=FSM_Closed;
break;
case FSM_Starting:
//if (layer->init_req_cnt) layer->init_req_cnt(layer);
init_req_counter(layer,layer->max_configure);
--layer->restart_counter;
if (layer->send_conf_req)
if (layer->send_conf_req(layer))
return -1;
layer->fsm_state=FSM_Req_Sent;
break;
default:
break;
}
return 0;
}
void ppp_fsm_lower_down(struct ppp_fsm_t *layer)
{
switch(layer->fsm_state)
{
case FSM_Closed:
case FSM_Closing:
layer->fsm_state=FSM_Initial;
break;
case FSM_Stopped:
if (layer->layer_started) layer->layer_started(layer);
layer->fsm_state=FSM_Starting;
break;
case FSM_Stopping:
case FSM_Req_Sent:
case FSM_Ack_Rcvd:
case FSM_Ack_Sent:
layer->fsm_state=FSM_Starting;
break;
case FSM_Opened:
if (layer->layer_down) layer->layer_down(layer);
layer->fsm_state=FSM_Starting;
break;
default:
break;
}
}
int ppp_fsm_open(struct ppp_fsm_t *layer)
{
switch(layer->fsm_state)
{
case FSM_Initial:
if (layer->layer_started) layer->layer_started(layer);
layer->fsm_state=FSM_Starting;
break;
case FSM_Starting:
break;
case FSM_Closed:
//if (layer->init_req_cnt) layer->init_req_cnt(layer);
init_req_counter(layer,layer->max_configure);
--layer->restart_counter;
if (layer->send_conf_req)
if (layer->send_conf_req(layer))
return -1;
layer->fsm_state=FSM_Req_Sent;
break;
case FSM_Closing:
case FSM_Stopping:
case FSM_Stopped:
case FSM_Opened:
ppp_fsm_lower_down(layer);
ppp_fsm_lower_up(layer);
break;
default:
break;
}
return 0;
}
void ppp_fsm_close(struct ppp_fsm_t *layer)
{
switch(layer->fsm_state)
{
case FSM_Starting:
if (layer->layer_finished) layer->layer_finished(layer);
layer->fsm_state=FSM_Initial;
break;
case FSM_Stopped:
layer->fsm_state=FSM_Closed;
break;
case FSM_Stopping:
layer->fsm_state=FSM_Closing;
break;
case FSM_Opened:
if (layer->layer_down) layer->layer_down(layer);
case FSM_Req_Sent:
case FSM_Ack_Rcvd:
case FSM_Ack_Sent:
//if (layer->init_req_cnt) layer->init_req_cnt(layer);
init_req_counter(layer,layer->max_terminate);
send_term_req(layer);
layer->fsm_state=FSM_Closing;
break;
default:
break;
}
}
void ppp_fsm_timeout0(struct ppp_fsm_t *layer)
{
switch(layer->fsm_state)
{
case FSM_Closing:
case FSM_Stopping:
send_term_req(layer);
break;
case FSM_Ack_Rcvd:
layer->fsm_state=FSM_Req_Sent;
case FSM_Req_Sent:
case FSM_Ack_Sent:
--layer->restart_counter;
if (layer->send_conf_req) layer->send_conf_req(layer);
break;
default:
break;
}
}
void ppp_fsm_timeout1(struct ppp_fsm_t *layer)
{
switch(layer->fsm_state)
{
case FSM_Closing:
stop_timer(layer);
if (layer->layer_finished) layer->layer_finished(layer);
layer->fsm_state=FSM_Closed;
break;
case FSM_Stopping:
stop_timer(layer);
if (layer->layer_finished) layer->layer_finished(layer);
layer->fsm_state=FSM_Stopped;
break;
case FSM_Ack_Rcvd:
case FSM_Req_Sent:
case FSM_Ack_Sent:
stop_timer(layer);
if (layer->layer_finished) layer->layer_finished(layer);
layer->fsm_state=FSM_Stopped;
break;
default:
break;
}
}
void ppp_fsm_recv_conf_req_ack(struct ppp_fsm_t *layer)
{
switch(layer->fsm_state)
{
case FSM_Closed:
send_term_ack(layer);
break;
case FSM_Stopped:
//if (layer->init_req_cnt) layer->init_req_cnt(layer);
init_req_counter(layer,layer->max_configure);
--layer->restart_counter;
if (layer->send_conf_req) layer->send_conf_req(layer);
case FSM_Req_Sent:
case FSM_Ack_Sent:
if (layer->send_conf_ack) layer->send_conf_ack(layer);
layer->fsm_state=FSM_Ack_Sent;
break;
case FSM_Ack_Rcvd:
if (layer->send_conf_ack) layer->send_conf_ack(layer);
stop_timer(layer);
if (layer->layer_up) layer->layer_up(layer);
layer->fsm_state=FSM_Opened;
break;
case FSM_Opened:
if (layer->layer_down) layer->layer_down(layer);
--layer->restart_counter;
if (layer->send_conf_req) layer->send_conf_req(layer);
if (layer->send_conf_ack) layer->send_conf_ack(layer);
layer->fsm_state=FSM_Ack_Sent;
break;
default:
break;
}
}
void ppp_fsm_recv_conf_req_nak(struct ppp_fsm_t *layer)
{
switch(layer->fsm_state)
{
case FSM_Closed:
send_term_ack(layer);
break;
case FSM_Stopped:
//if (layer->init_req_cnt) layer->init_req_cnt(layer);
init_req_counter(layer,layer->max_configure);
--layer->restart_counter;
if (layer->send_conf_req) layer->send_conf_req(layer);
case FSM_Ack_Sent:
if (layer->send_conf_nak) layer->send_conf_nak(layer);
layer->fsm_state=FSM_Req_Sent;
break;
case FSM_Req_Sent:
case FSM_Ack_Rcvd:
if (layer->send_conf_nak) layer->send_conf_nak(layer);
break;
case FSM_Opened:
if (layer->layer_down) layer->layer_down(layer);
--layer->restart_counter;
if (layer->send_conf_req) layer->send_conf_req(layer);
if (layer->send_conf_nak) layer->send_conf_nak(layer);
layer->fsm_state=FSM_Req_Sent;
break;
default:
break;
}
}
void ppp_fsm_recv_conf_req_rej(struct ppp_fsm_t *layer)
{
switch(layer->fsm_state)
{
case FSM_Closed:
send_term_ack(layer);
break;
case FSM_Stopped:
//if (layer->init_req_cnt) layer->init_req_cnt(layer);
init_req_counter(layer,layer->max_configure);
--layer->restart_counter;
if (layer->send_conf_req) layer->send_conf_req(layer);
case FSM_Ack_Sent:
if (layer->send_conf_rej) layer->send_conf_rej(layer);
layer->fsm_state=FSM_Req_Sent;
break;
case FSM_Req_Sent:
case FSM_Ack_Rcvd:
if (layer->send_conf_rej) layer->send_conf_rej(layer);
break;
case FSM_Opened:
if (layer->layer_down) layer->layer_down(layer);
--layer->restart_counter;
if (layer->send_conf_req) layer->send_conf_req(layer);
if (layer->send_conf_rej) layer->send_conf_rej(layer);
layer->fsm_state=FSM_Req_Sent;
break;
default:
break;
}
}
void ppp_fsm_recv_conf_ack(struct ppp_fsm_t *layer)
{
switch(layer->fsm_state)
{
case FSM_Closed:
case FSM_Stopped:
send_term_ack(layer);
break;
case FSM_Req_Sent:
//if (layer->init_req_cnt) layer->init_req_cnt(layer);
init_req_counter(layer,layer->max_configure);
layer->fsm_state=FSM_Ack_Rcvd;
break;
case FSM_Ack_Rcvd:
--layer->restart_counter;
if (layer->send_conf_req) layer->send_conf_req(layer);
layer->fsm_state=FSM_Req_Sent;
break;
case FSM_Ack_Sent:
//if (layer->init_req_cnt) layer->init_req_cnt(layer);
//init_req_counter(layer,layer->max_configure);
//tlu
stop_timer(layer);
if (layer->layer_up) layer->layer_up(layer);
layer->fsm_state=FSM_Opened;
break;
case FSM_Opened:
if (layer->layer_down) layer->layer_down(layer);
--layer->restart_counter;
if (layer->send_conf_req) layer->send_conf_req(layer);
layer->fsm_state=FSM_Req_Sent;
default:
break;
}
}
void ppp_fsm_recv_conf_rej(struct ppp_fsm_t *layer)
{
switch(layer->fsm_state)
{
case FSM_Closed:
case FSM_Stopped:
send_term_ack(layer);
break;
case FSM_Req_Sent:
//if (layer->init_req_cnt) layer->init_req_cnt(layer);
init_req_counter(layer,layer->max_failure);
--layer->restart_counter;
if (layer->send_conf_req) layer->send_conf_req(layer);
break;
case FSM_Ack_Rcvd:
--layer->restart_counter;
if (layer->send_conf_req) layer->send_conf_req(layer);
layer->fsm_state=FSM_Req_Sent;
break;
case FSM_Ack_Sent:
//if (layer->init_req_cnt) layer->init_req_cnt(layer);
init_req_counter(layer,layer->max_configure);
--layer->restart_counter;
if (layer->send_conf_req) layer->send_conf_req(layer);
break;
case FSM_Opened:
if (layer->layer_down) layer->layer_down(layer);
--layer->restart_counter;
if (layer->send_conf_req) layer->send_conf_req(layer);
layer->fsm_state=FSM_Req_Sent;
break;
default:
break;
}
}
void ppp_fsm_recv_term_req(struct ppp_fsm_t *layer)
{
switch(layer->fsm_state)
{
case FSM_Opened:
if (layer->layer_down) layer->layer_down(layer);
send_term_req(layer);
send_term_ack(layer);
//if (layer->zero_req_cnt) layer->zero_req_cnt(layer);
zero_req_counter(layer);
layer->fsm_state=FSM_Stopping;
break;
case FSM_Req_Sent:
case FSM_Ack_Rcvd:
case FSM_Ack_Sent:
send_term_req(layer);
layer->fsm_state=FSM_Req_Sent;
break;
default:
send_term_req(layer);
break;
}
}
void ppp_fsm_recv_term_ack(struct ppp_fsm_t *layer)
{
switch(layer->fsm_state)
{
case FSM_Closing:
if (layer->layer_finished) layer->layer_finished(layer);
layer->fsm_state=FSM_Closed;
break;
case FSM_Stopping:
if (layer->layer_finished) layer->layer_finished(layer);
layer->fsm_state=FSM_Stopped;
break;
case FSM_Ack_Rcvd:
layer->fsm_state=FSM_Req_Sent;
break;
case FSM_Opened:
if (layer->layer_down) layer->layer_down(layer);
--layer->restart_counter;
if (layer->send_conf_req) layer->send_conf_req(layer);
layer->fsm_state=FSM_Req_Sent;
break;
default:
break;
}
}
void ppp_fsm_recv_unk(struct ppp_fsm_t *layer)
{
if (layer->send_conf_rej) layer->send_conf_rej(layer);
}
void ppp_fsm_recv_code_rej_perm(struct ppp_fsm_t *layer)
{
switch(layer->fsm_state)
{
case FSM_Ack_Rcvd:
layer->fsm_state=FSM_Req_Sent;
break;
default:
break;
}
}
void ppp_fsm_recv_code_rej_bad(struct ppp_fsm_t *layer)
{
switch(layer->fsm_state)
{
case FSM_Opened:
if (layer->layer_down) layer->layer_down(layer);
send_term_req(layer);
layer->fsm_state=FSM_Stopping;
break;
case FSM_Closing:
if (layer->layer_finished) layer->layer_finished(layer);
layer->fsm_state=FSM_Closed;
break;
case FSM_Stopping:
case FSM_Req_Sent:
case FSM_Ack_Rcvd:
case FSM_Ack_Sent:
if (layer->layer_finished) layer->layer_finished(layer);
layer->fsm_state=FSM_Stopped;
break;
default:
break;
}
}
void send_term_req(struct ppp_fsm_t *layer)
{
struct lcp_hdr_t hdr = {
.proto = htons(PPP_LCP),
.code = TERMREQ,
.id = ++layer->id,
.len = htons(4),
};
log_debug("send [LCP TermReq id=%i \"\"]\n",hdr.id);
--layer->restart_counter;
ppp_chan_send(layer->ppp, &hdr, 6);
}
void send_term_ack(struct ppp_fsm_t *layer)
{
struct lcp_hdr_t hdr = {
.proto = htons(PPP_LCP),
.code = TERMACK,
.id = layer->recv_id,
.len = htons(4),
};
log_debug("send [LCP TermAck id=%i \"\"]\n", hdr.id);
ppp_chan_send(layer->ppp, &hdr, 6);
}
static void stop_timer(struct ppp_fsm_t *fsm)
{
if (fsm->restart_timer.period) {
fsm->restart_timer.period = 0;
triton_timer_del(&fsm->restart_timer);
}
}
static void init_req_counter(struct ppp_fsm_t *layer,int timeout)
{
layer->restart_timer.expire_tv.tv_sec=0;
layer->restart_counter = timeout;
if (!layer->restart_timer.period) {
layer->restart_timer.period = layer->timeout * 1000;
triton_timer_add(layer->ppp->ctrl->ctx, &layer->restart_timer, 0);
}
}
static void zero_req_counter(struct ppp_fsm_t *layer)
{
layer->restart_timer.expire_tv.tv_sec=0;
layer->restart_counter=0;
}
static void restart_timer_func(struct triton_timer_t *t)
{
struct ppp_fsm_t *layer = container_of(t, typeof(*layer), restart_timer);
if (layer->restart_counter>0)
ppp_fsm_timeout0(layer);
else
ppp_fsm_timeout1(layer);
}
void __init fsm_init(void)
{
char *opt;
opt = conf_get_opt("lcp", "max-terminate");
if (opt && atoi(opt) > 0)
conf_max_terminate = atoi(opt);
opt = conf_get_opt("lcp", "max-configure");
if (opt && atoi(opt) > 0)
conf_max_configure = atoi(opt);
opt = conf_get_opt("lcp", "max-failure");
if (opt && atoi(opt) > 0)
conf_max_failure = atoi(opt);
opt = conf_get_opt("lcp", "timeout");
if (opt && atoi(opt) > 0)
conf_timeout = atoi(opt);
}
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