/******************************************************************** * * get_loop_output - get outgoing packets from the ppp device, * and detect when we want to bring the real link up. * Return value is 1 if we need to bring up the link, 0 otherwise. */ int get_loop_output(void) { int rv = 0; int n; if (new_style_driver) { while ((n = read_packet(inpacket_buf)) > 0) if (loop_frame(inpacket_buf, n)) rv = 1; return rv; } while ((n = read(master_fd, inbuf, sizeof(inbuf))) > 0) if (loop_chars(inbuf, n)) rv = 1; if (n == 0) fatal("eof on loopback"); if (errno != EWOULDBLOCK) fatal("read from loopback: %m(%d)", errno); return rv; }
/* * get_loop_output - read characters from the loopback, form them * into frames, and detect when we want to bring the real link up. * Return value is 1 if we need to bring up the link, 0 otherwise. */ int get_loop_output(void) { int rv = 0; int n; while ((n = read(loop_master, inbuf, sizeof(inbuf))) >= 0) { if (loop_chars(inbuf, n)) rv = 1; } if (n == 0) fatal("eof on loopback"); if (errno != EWOULDBLOCK) fatal("read from loopback: %m"); return rv; }