static int pap_send_auth_req(ppp_protocol_t *self, int resend) {
int nl = strlen(ppp_state->username);
int pl = strlen(ppp_state->passwd);
uint16_t len = 6 + nl + pl;
uint8_t buf[len];
int i = 0, j;
pap_pkt_t *pkt = (pap_pkt_t *)buf;
(void)self;
/* Fill in the header. */
pkt->code = PAP_AUTHENTICATE_REQ;
if(resend)
pkt->id = pap_id;
else
pkt->id = ++pap_id;
pkt->len = htons(len);
/* Fill in the rest of the packet. */
pkt->data[i++] = nl;
for(j = 0; j < nl; ++j) {
pkt->data[i++] = ppp_state->username[j];
}
pkt->data[i++] = pl;
for(j = 0; j < pl; ++j) {
pkt->data[i++] = ppp_state->passwd[j];
}
/* Set the resend timer for 3 seconds. */
next_resend = timer_ms_gettime64() + 3000;
if(!resend)
resend_cnt = 10;
return ppp_send(buf, len, PPP_PROTOCOL_PAP);
}
/*---------------------------------------------------------------------------*/
static void
output(u8_t *hdr, u16_t hdrlen, u8_t *data, u16_t datalen)
{
ppp_send();
}
int pppd(struct pppd_settings_s *pppd_settings)
{
struct pollfd fds[2];
int ret;
struct ppp_context_s *ctx;
ctx = (struct ppp_context_s*)malloc(sizeof(struct ppp_context_s));
memset(ctx, 0, sizeof(struct ppp_context_s));
strcpy((char*)ctx->ifname, "ppp%d");
ctx->settings = pppd_settings;
ctx->if_fd = tun_alloc((char*)ctx->ifname);
if (ctx->if_fd < 0)
{
free(ctx);
return 2;
}
ctx->ctl.fd = open_tty(pppd_settings->ttyname);
if (ctx->ctl.fd < 0)
{
close(ctx->ctl.fd);
free(ctx);
return 2;
}
ctx->ctl.echo = true;
ctx->ctl.verbose = true;
ctx->ctl.timeout = 30;
fds[0].fd = ctx->if_fd;
fds[0].events = POLLIN;
fds[1].fd = ctx->ctl.fd;
fds[1].events = POLLIN;
ppp_init(ctx);
ppp_reconnect(ctx);
while (1)
{
fds[0].revents = fds[1].revents = 0;
ret = poll(fds, 2, 1000);
if (ret > 0 && fds[0].revents & POLLIN)
{
ret = read(ctx->if_fd, ctx->ip_buf, PPP_RX_BUFFER_SIZE);
printf("read from tun :%i\n", ret);
if (ret > 0)
{
ctx->ip_len = ret;
ppp_send(ctx);
ctx->ip_len = 0;
}
}
ppp_poll(ctx);
if (ppp_check_errors(ctx))
{
ppp_reconnect(ctx);
}
else
{
if (ctx->ip_len > 0)
{
ret = write(ctx->if_fd, ctx->ip_buf, ctx->ip_len);
ctx->ip_len = 0;
ret = read(ctx->if_fd, ctx->ip_buf, PPP_RX_BUFFER_SIZE);
if (ret > 0)
{
ctx->ip_len = ret;
ppp_send(ctx);
ctx->ip_len = 0;
}
}
}
}
return 1;
}
