1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
4  * Copyright (c) 1996 - 2001 Brian Somers <brian@Awfulhak.org>
5  *          based on work by Toshiharu OHNO <tony-o@iij.ad.jp>
115   SignalBundle->CleaningUp = 1;  in Cleanup()
186   /* Drops all child prompts and re-opens the socket */  in RestartServer()
193   fprintf(stderr, "usage: ppp [-auto | -foreground | -background | -direct |"  in Usage()
194           " -dedicated | -ddial | -interactive]"  in Usage()
196           " [-nat]"  in Usage()
198           " [-quiet] [-unit N] [system ...]\n");  in Usage()
206   int mode;  member
211 ProcessArgs(int argc, char **argv, struct switches *sw)  in ProcessArgs()  argument
217   memset(sw, '\0', sizeof *sw);  in ProcessArgs()
218   sw->mode = PHYS_INTERACTIVE;  in ProcessArgs()
219   sw->unit = -1;  in ProcessArgs()
221   for (arg = 1; arg < argc && *argv[arg] == '-'; arg++, optc++) {  in ProcessArgs()
230           sw->nat = 1;  in ProcessArgs()
232           optc--;			/* this option isn't exclusive */  in ProcessArgs()
240           sw->nat = 1;  in ProcessArgs()
242           optc--;			/* this option isn't exclusive */  in ProcessArgs()
244           optc--;			/* this option isn't exclusive */  in ProcessArgs()
246             optc--;			/* nor is the argument */  in ProcessArgs()
248               fprintf(stderr, "-unit: Expected unit number\n");  in ProcessArgs()
251               sw->unit = atoi(argv[arg]);  in ProcessArgs()
253             sw->unit = atoi(cp + 4);  in ProcessArgs()
255           sw->quiet = 1;  in ProcessArgs()
256           optc--;			/* this option isn't exclusive */  in ProcessArgs()
266         sw->mode = newmode;  in ProcessArgs()
268           sw->fg = 1;  in ProcessArgs()
273     fprintf(stderr, "You may specify only one mode.\n");  in ProcessArgs()
277   if (sw->mode == PHYS_AUTO && arg == argc) {  in ProcessArgs()
278     fprintf(stderr, "A system must be specified in auto mode.\n");  in ProcessArgs()
286 CheckLabel(const char *label, struct prompt *prompt, int mode)  in CheckLabel()  argument
290   if ((err = system_IsValid(label, prompt, mode)) != NULL) {  in CheckLabel()
292     if (mode == PHYS_DIRECT)  in CheckLabel()
293       log_Printf(LogWARN, "Label %s rejected -direct connection: %s\n",  in CheckLabel()
310   struct switches sw;  in main()  local
320   if ((holdfd[0] = open(_PATH_DEVNULL, O_RDWR)) == -1) {  in main()
333   label = ProcessArgs(argc, argv, &sw);  in main()
339    * routing table and then run ppp in interactive mode.  The `show route'  in main()
342   if (sw.mode == PHYS_INTERACTIVE) {  in main()
350   /* Allow output for the moment (except in direct mode) */  in main()
351   if (sw.mode == PHYS_DIRECT)  in main()
367         return -1;  in main()
369       ptr = conf + strlen(conf)-2;  in main()
371         *ptr-- = '\0';  in main()
377       CheckLabel(argv[arg], prompt, sw.mode);  in main()
379     CheckLabel("default", prompt, sw.mode);  in main()
381   if (!sw.quiet)  in main()
382     prompt_Printf(prompt, "Working in %s mode\n", mode2Nam(sw.mode));  in main()
384   if ((bundle = bundle_Create(TUN_PREFIX, sw.mode, sw.unit)) == NULL)  in main()
390   bundle->NatEnabled = sw.nat;  in main()
391   if (sw.nat)  in main()
404   if (sw.mode == PHYS_INTERACTIVE)  in main()
410   lastlabel = argv[argc - 1];  in main()
421   if (sw.mode == PHYS_AUTO &&  in main()
422       ncprange_family(&bundle->ncp.ipcp.cfg.peer_range) == AF_UNSPEC) {  in main()
424                   "in auto mode.\n");  in main()
429     prompt->bundle = bundle;	/* couldn't do it earlier */  in main()
430     if (!sw.quiet)  in main()
431       prompt_Printf(prompt, "Using interface: %s\n", bundle->iface->name);  in main()
434   if (sw.mode != PHYS_INTERACTIVE) {  in main()
435     if (sw.mode != PHYS_DIRECT) {  in main()
436       if (!sw.fg) {  in main()
440         if (sw.mode == PHYS_BACKGROUND && pipe(bgpipe)) {  in main()
446         if (bgpid == -1) {  in main()
455 	  if (sw.mode == PHYS_BACKGROUND) {  in main()
468                   if (!sw.quiet) {  in main()
474                   if (!sw.quiet)  in main()
478                   if (!sw.quiet)  in main()
496         } else if (sw.mode == PHYS_BACKGROUND) {  in main()
498           bundle->notify.fd = bgpipe[1];  in main()
505       /* -auto, -dedicated, -ddial, -foreground & -background */  in main()
510       if (!sw.fg)  in main()
514        * -direct - STDIN_FILENO gets used by physical_Open.  STDOUT_FILENO  in main()
515        * *may* get used in exec/pipe mode.  in main()
521     /* -interactive */  in main()
532   log_Printf(LogPHASE, "PPP Started (%s mode).\n", mode2Nam(sw.mode));  in main()
570     descriptor_UpdateSet(&bundle->desc, rfds, wfds, efds, &nfds);  in DoLoop()
577       /* Don't select - we'll be here forever */  in DoLoop()
603             if (select(nfds, rfds, wfds, efds, &t) != -1) {  in DoLoop()
612             if (select(nfds, rfds, wfds, efds, &t) != -1) {  in DoLoop()
621             if (select(nfds, rfds, wfds, efds, &t) != -1) {  in DoLoop()
658     if (descriptor_IsSet(&bundle->desc, rfds)) {  in DoLoop()
659       descriptor_Read(&bundle->desc, bundle, rfds);  in DoLoop()
663     if (descriptor_IsSet(&bundle->desc, wfds))  in DoLoop()
664       if (descriptor_Write(&bundle->desc, bundle, wfds) <= 0 && nothing_done) {  in DoLoop()