Hi Ahmed,
On Sat, Jun 01, 2013 at 04:22:56AM -0700, Ahmed Fayek wrote:
> Hi,
>
> My application is a GPRS router that route data to/from eathernet
> interface and serial GPRS module usin ti stellaris LM3S6918.
>
> I try to use the ppp_new code, I need to know the sequence to start
> the pppos using the new functions. I am asking if there is an example
> project.
This is quite easy, ppp.h is well documented about that.
Basically:
ppp_pcb *ppps;
int fd;
fd = open_serial_port();
ppps = ppp_new();
ppp_set_auth(ppps, PPPAUTHTYPE_PAP, "login", "password");
ppp_over_serial_create(ppps, fd, ppp_link_status_cb, NULL);
your_chatscript(fd) {
[ ... ]
ppp_open(ppps,
0);
}
while(1) {
u8_t buffer[128];
int len;
len = sio_read(fd, buffer, 128);
if(len < 0) {
pppapi_sighup(ppps);
} else {
pppos_input(ppps, buffer, len);
}
}
You have to use pppapi_ functions if lwIP is already started, ppp_
functions are not thread safe.
Closing a running session:
ppp_close(ppps); /* or pppapi_close(ppps);, as usual */
/* --- wait for callback, do NOT destroy the PPP PCB until PPP finished
* the cleaning job
*/
Dummy callback, called from the lwIP thread, should be non-blocking:
void ppp_link_status_cb(ppp_pcb *pcb, int err_code, void *ctx) {
switch(err_code) {
case PPPERR_NONE: {
struct ppp_addrs *ppp_addrs =
ppp_addrs(pcb);
fprintf(stderr, "ppp_link_status_cb: PPPERR_NONE\n\r");
fprintf(stderr, " our_ipaddr = %s\n\r", ip_ntoa(&ppp_addrs->our_ipaddr));
fprintf(stderr, " his_ipaddr = %s\n\r", ip_ntoa(&ppp_addrs->his_ipaddr));
fprintf(stderr, " netmask = %s\n\r", ip_ntoa(&ppp_addrs->netmask));
fprintf(stderr, " dns1 = %s\n\r", ip_ntoa(&ppp_addrs->dns1));
fprintf(stderr, " dns2 = %s\n\r", ip_ntoa(&ppp_addrs->dns2));
#if PPP_IPV6_SUPPORT
fprintf(stderr, " our6_ipaddr = %s\n\r", ip6addr_ntoa(&ppp_addrs->our6_ipaddr));
fprintf(stderr, " his6_ipaddr = %s\n\r", ip6addr_ntoa(&ppp_addrs->his6_ipaddr));
#endif /* PPP_IPV6_SUPPORT */
break;
}
default: {
fprintf(stderr, "ppp_link_status_cb: err code %d\n\r", err_code);
restart_chatscript(pcb, 5); /* Should trigger chatscript, in another thread for example, so that you are not locking the lwIP thread */
/* You can also use ppp_delete() here */
break;
}
}
}
> another question about sio.c specially reading data, what is the
> criteria to end reading? length or a certain character received? As I
> found an application dealing with fixed max. length data passed to
> sio_read()
In ppp-new branch, you have to call pppos_input() when you get new data
from your serial port. This function is thread safe and can be called
from a dedicated RX-thread or from a main-loop.
Sylvain
_______________________________________________
lwip-users mailing list
address@hiddenhttps://lists.nongnu.org/mailman/listinfo/lwip-users