nes-proj/platform/minimal-ppp/ppp-arch.c

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#include "contiki.h"
#include <pty.h>
#include <stdio.h>
#include <sys/select.h>
static int ppp_master_fd = -1;
static int ppp_slave_fd = -1;
static char ppp_slave_name[80];
void init_pty() {
char cmd[256];
if (ppp_master_fd == -1) {
if (openpty( &ppp_master_fd, &ppp_slave_fd, ppp_slave_name, NULL, NULL)==0)
{
sprintf( cmd, "stty raw -echo -echoe < %s", ppp_slave_name);
system(cmd);
printf("pty opened, slave name = %s\n", ppp_slave_name);
printf("Now start pppd, for example with:\n");
printf("/usr/sbin/pppd %s 115200 local noauth nocrtscts nodetach persist asyncmap 0xffffffff 192.168.1.1:192.168.1.2\n",
ppp_slave_name);
close(ppp_slave_fd);
} else {
printf("pty open failed\n");
exit(1);
}
}
}
void ppp_arch_putchar(u8_t c) {
init_pty();
if (write( ppp_master_fd, &c, 1 ) > 0) {
//printf("wr=0x%02x '%c'\n", c, c>=' '?c<0x7f?c:' ':' ');
} else {
//printf("wr=0x%02x '%c' FAILED\n", c, c>=' '?c<0x7f?c:' ':' ');
}
}
int ppp_arch_getchar(u8_t *p) {
fd_set read_fds;
struct timeval timeout;
init_pty();
FD_ZERO( &read_fds );
FD_SET( ppp_master_fd, &read_fds );
timeout.tv_sec = 0;
timeout.tv_usec = 10000;
if (select( ppp_master_fd+1, &read_fds, NULL, NULL, &timeout) != 0) {
if (FD_ISSET( ppp_master_fd, &read_fds )) {
if ( read( ppp_master_fd, p, 1) > 0 ) {
//printf("rd=0x%02x\n", *p);
return 1;
}
return 0;
}
printf("closing pty: %s\n", ppp_slave_name);
close( ppp_master_fd );
ppp_master_fd == -1;
} else {
return 0;
}
}