diff options
Diffstat (limited to 'mdk-stage1/ppp/pppd/options.c')
| -rw-r--r-- | mdk-stage1/ppp/pppd/options.c | 1513 |
1 files changed, 0 insertions, 1513 deletions
diff --git a/mdk-stage1/ppp/pppd/options.c b/mdk-stage1/ppp/pppd/options.c deleted file mode 100644 index 1921d9ec5..000000000 --- a/mdk-stage1/ppp/pppd/options.c +++ /dev/null @@ -1,1513 +0,0 @@ -/* - * options.c - handles option processing for PPP. - * - * Copyright (c) 1989 Carnegie Mellon University. - * All rights reserved. - * - * Redistribution and use in source and binary forms are permitted - * provided that the above copyright notice and this paragraph are - * duplicated in all such forms and that any documentation, - * advertising materials, and other materials related to such - * distribution and use acknowledge that the software was developed - * by Carnegie Mellon University. The name of the - * University may not be used to endorse or promote products derived - * from this software without specific prior written permission. - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED - * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. - */ - -#define RCSID "$Id$" - -#include <ctype.h> -#include <stdio.h> -#include <errno.h> -#include <unistd.h> -#include <fcntl.h> -#include <stdlib.h> -#include <syslog.h> -#include <string.h> -#include <pwd.h> -#ifdef PLUGIN -#include <dlfcn.h> -#endif -#ifdef PPP_FILTER -#include <pcap.h> -#include <pcap-int.h> /* XXX: To get struct pcap */ -#endif - -#include "pppd.h" -#include "pathnames.h" - -#if defined(ultrix) || defined(NeXT) -char *strdup __P((char *)); -#endif - -static const char rcsid[] = RCSID; - -struct option_value { - struct option_value *next; - const char *source; - char value[1]; -}; - -/* - * Option variables and default values. - */ -#ifdef PPP_FILTER -int dflag = 0; /* Tell libpcap we want debugging */ -#endif -int debug = 0; /* Debug flag */ -int kdebugflag = 0; /* Tell kernel to print debug messages */ -int default_device = 1; /* Using /dev/tty or equivalent */ -char devnam[MAXPATHLEN]; /* Device name */ -bool nodetach = 0; /* Don't detach from controlling tty */ -bool updetach = 0; /* Detach once link is up */ -int maxconnect = 0; /* Maximum connect time */ -char user[MAXNAMELEN]; /* Username for PAP */ -char passwd[MAXSECRETLEN]; /* Password for PAP */ -bool persist = 0; /* Reopen link after it goes down */ -char our_name[MAXNAMELEN]; /* Our name for authentication purposes */ -bool demand = 0; /* do dial-on-demand */ -char *ipparam = NULL; /* Extra parameter for ip up/down scripts */ -int idle_time_limit = 0; /* Disconnect if idle for this many seconds */ -int holdoff = 30; /* # seconds to pause before reconnecting */ -bool holdoff_specified; /* true if a holdoff value has been given */ -int log_to_fd = 1; /* send log messages to this fd too */ -bool log_default = 1; /* log_to_fd is default (stdout) */ -int maxfail = 10; /* max # of unsuccessful connection attempts */ -char linkname[MAXPATHLEN]; /* logical name for link */ -bool tune_kernel; /* may alter kernel settings */ -int connect_delay = 1000; /* wait this many ms after connect script */ -int req_unit = -1; /* requested interface unit */ -bool multilink = 0; /* Enable multilink operation */ -char *bundle_name = NULL; /* bundle name for multilink */ -bool dump_options; /* print out option values */ -bool dryrun; /* print out option values and exit */ -char *domain; /* domain name set by domain option */ - -extern option_t auth_options[]; -extern struct stat devstat; - -#ifdef PPP_FILTER -struct bpf_program pass_filter;/* Filter program for packets to pass */ -struct bpf_program active_filter; /* Filter program for link-active pkts */ -pcap_t pc; /* Fake struct pcap so we can compile expr */ -#endif - -char *current_option; /* the name of the option being parsed */ -int privileged_option; /* set iff the current option came from root */ -char *option_source; /* string saying where the option came from */ -int option_priority = OPRIO_CFGFILE; /* priority of the current options */ -bool devnam_fixed; /* can no longer change device name */ - -static int logfile_fd = -1; /* fd opened for log file */ -static char logfile_name[MAXPATHLEN]; /* name of log file */ - -/* - * Prototypes - */ -static int setdomain __P((char **)); -static int readfile __P((char **)); -static int callfile __P((char **)); -static int showversion __P((char **)); -static int showhelp __P((char **)); -static void usage __P((void)); -static int setlogfile __P((char **)); -#ifdef PLUGIN -static int loadplugin __P((char **)); -#endif - -#ifdef PPP_FILTER -static int setpassfilter __P((char **)); -static int setactivefilter __P((char **)); -#endif - -static option_t *find_option __P((const char *name)); -static int process_option __P((option_t *, char *, char **)); -static int n_arguments __P((option_t *)); -static int number_option __P((char *, u_int32_t *, int)); - -/* - * Structure to store extra lists of options. - */ -struct option_list { - option_t *options; - struct option_list *next; -}; - -static struct option_list *extra_options = NULL; - -/* - * Valid arguments. - */ -option_t general_options[] = { - { "debug", o_int, &debug, - "Increase debugging level", OPT_INC | OPT_NOARG | 1 }, - { "-d", o_int, &debug, - "Increase debugging level", - OPT_ALIAS | OPT_INC | OPT_NOARG | 1 }, - - { "kdebug", o_int, &kdebugflag, - "Set kernel driver debug level", OPT_PRIO }, - - { "nodetach", o_bool, &nodetach, - "Don't detach from controlling tty", OPT_PRIO | 1 }, - { "-detach", o_bool, &nodetach, - "Don't detach from controlling tty", OPT_ALIAS | OPT_PRIOSUB | 1 }, - { "updetach", o_bool, &updetach, - "Detach from controlling tty once link is up", - OPT_PRIOSUB | OPT_A2CLR | 1, &nodetach }, - - { "holdoff", o_int, &holdoff, - "Set time in seconds before retrying connection", OPT_PRIO }, - - { "idle", o_int, &idle_time_limit, - "Set time in seconds before disconnecting idle link", OPT_PRIO }, - - { "maxconnect", o_int, &maxconnect, - "Set connection time limit", - OPT_PRIO | OPT_LLIMIT | OPT_NOINCR | OPT_ZEROINF }, - - { "domain", o_special, (void *)setdomain, - "Add given domain name to hostname", - OPT_PRIO | OPT_PRIV | OPT_A2STRVAL, &domain }, - - { "file", o_special, (void *)readfile, - "Take options from a file", OPT_NOPRINT }, - { "call", o_special, (void *)callfile, - "Take options from a privileged file", OPT_NOPRINT }, - - { "persist", o_bool, &persist, - "Keep on reopening connection after close", OPT_PRIO | 1 }, - { "nopersist", o_bool, &persist, - "Turn off persist option", OPT_PRIOSUB }, - - { "demand", o_bool, &demand, - "Dial on demand", OPT_INITONLY | 1, &persist }, - - { "--version", o_special_noarg, (void *)showversion, - "Show version number" }, - { "--help", o_special_noarg, (void *)showhelp, - "Show brief listing of options" }, - { "-h", o_special_noarg, (void *)showhelp, - "Show brief listing of options", OPT_ALIAS }, - - { "logfile", o_special, (void *)setlogfile, - "Append log messages to this file", - OPT_PRIO | OPT_A2STRVAL | OPT_STATIC, &logfile_name }, - { "logfd", o_int, &log_to_fd, - "Send log messages to this file descriptor", - OPT_PRIOSUB | OPT_A2CLR, &log_default }, - { "nolog", o_int, &log_to_fd, - "Don't send log messages to any file", - OPT_PRIOSUB | OPT_NOARG | OPT_VAL(-1) }, - { "nologfd", o_int, &log_to_fd, - "Don't send log messages to any file descriptor", - OPT_PRIOSUB | OPT_ALIAS | OPT_NOARG | OPT_VAL(-1) }, - - { "linkname", o_string, linkname, - "Set logical name for link", - OPT_PRIO | OPT_PRIV | OPT_STATIC, NULL, MAXPATHLEN }, - - { "maxfail", o_int, &maxfail, - "Maximum number of unsuccessful connection attempts to allow", - OPT_PRIO }, - - { "ktune", o_bool, &tune_kernel, - "Alter kernel settings as necessary", OPT_PRIO | 1 }, - { "noktune", o_bool, &tune_kernel, - "Don't alter kernel settings", OPT_PRIOSUB }, - - { "connect-delay", o_int, &connect_delay, - "Maximum time (in ms) to wait after connect script finishes", - OPT_PRIO }, - - { "unit", o_int, &req_unit, - "PPP interface unit number to use if possible", - OPT_PRIO | OPT_LLIMIT, 0, 0 }, - - { "dump", o_bool, &dump_options, - "Print out option values after parsing all options", 1 }, - { "dryrun", o_bool, &dryrun, - "Stop after parsing, printing, and checking options", 1 }, - -#ifdef HAVE_MULTILINK - { "multilink", o_bool, &multilink, - "Enable multilink operation", OPT_PRIO | 1 }, - { "mp", o_bool, &multilink, - "Enable multilink operation", OPT_PRIOSUB | OPT_ALIAS | 1 }, - { "nomultilink", o_bool, &multilink, - "Disable multilink operation", OPT_PRIOSUB | 0 }, - { "nomp", o_bool, &multilink, - "Disable multilink operation", OPT_PRIOSUB | OPT_ALIAS | 0 }, - - { "bundle", o_string, &bundle_name, - "Bundle name for multilink", OPT_PRIO }, -#endif /* HAVE_MULTILINK */ - -#ifdef PLUGIN - { "plugin", o_special, (void *)loadplugin, - "Load a plug-in module into pppd", OPT_PRIV | OPT_A2LIST }, -#endif - -#ifdef PPP_FILTER - { "pdebug", o_int, &dflag, - "libpcap debugging", OPT_PRIO }, - - { "pass-filter", 1, setpassfilter, - "set filter for packets to pass", OPT_PRIO }, - - { "active-filter", 1, setactivefilter, - "set filter for active pkts", OPT_PRIO }, -#endif - - { NULL } -}; - -#ifndef IMPLEMENTATION -#define IMPLEMENTATION "" -#endif - -static char *usage_string = "\ -pppd version %s\n\ -Usage: %s [ options ], where options are:\n\ - <device> Communicate over the named device\n\ - <speed> Set the baud rate to <speed>\n\ - <loc>:<rem> Set the local and/or remote interface IP\n\ - addresses. Either one may be omitted.\n\ - asyncmap <n> Set the desired async map to hex <n>\n\ - auth Require authentication from peer\n\ - connect <p> Invoke shell command <p> to set up the serial line\n\ - crtscts Use hardware RTS/CTS flow control\n\ - defaultroute Add default route through interface\n\ - file <f> Take options from file <f>\n\ - modem Use modem control lines\n\ - mru <n> Set MRU value to <n> for negotiation\n\ -See pppd(8) for more options.\n\ -"; - -/* - * parse_args - parse a string of arguments from the command line. - */ -int -parse_args(argc, argv) - int argc; - char **argv; -{ - char *arg; - option_t *opt; - int n; - - privileged_option = privileged; - option_source = "command line"; - option_priority = OPRIO_CMDLINE; - while (argc > 0) { - arg = *argv++; - --argc; - opt = find_option(arg); - if (opt == NULL) { - option_error("unrecognized option '%s'", arg); - usage(); - return 0; - } - n = n_arguments(opt); - if (argc < n) { - option_error("too few parameters for option %s", arg); - return 0; - } - if (!process_option(opt, arg, argv)) - return 0; - argc -= n; - argv += n; - } - return 1; -} - -/* - * options_from_file - Read a string of options from a file, - * and interpret them. - */ -int -options_from_file(filename, must_exist, check_prot, priv) - char *filename; - int must_exist; - int check_prot; - int priv; -{ - FILE *f; - int i, newline, ret, err; - option_t *opt; - int oldpriv, n; - char *oldsource; - char *argv[MAXARGS]; - char args[MAXARGS][MAXWORDLEN]; - char cmd[MAXWORDLEN]; - - if (check_prot) - seteuid(getuid()); - f = fopen(filename, "r"); - err = errno; - if (check_prot) - seteuid(0); - if (f == NULL) { - errno = err; - if (!must_exist) { - if (err != ENOENT && err != ENOTDIR) - warn("Warning: can't open options file %s: %m", filename); - return 1; - } - option_error("Can't open options file %s: %m", filename); - return 0; - } - - oldpriv = privileged_option; - privileged_option = priv; - oldsource = option_source; - option_source = strdup(filename); - if (option_source == NULL) - option_source = "file"; - ret = 0; - while (getword(f, cmd, &newline, filename)) { - opt = find_option(cmd); - if (opt == NULL) { - option_error("In file %s: unrecognized option '%s'", - filename, cmd); - goto err; - } - n = n_arguments(opt); - for (i = 0; i < n; ++i) { - if (!getword(f, args[i], &newline, filename)) { - option_error( - "In file %s: too few parameters for option '%s'", - filename, cmd); - goto err; - } - argv[i] = args[i]; - } - if (!process_option(opt, cmd, argv)) - goto err; - } - ret = 1; - -err: - fclose(f); - privileged_option = oldpriv; - option_source = oldsource; - return ret; -} - -/* - * options_from_user - See if the use has a ~/.ppprc file, - * and if so, interpret options from it. - */ -int -options_from_user() -{ - char *user, *path, *file; - int ret; - struct passwd *pw; - size_t pl; - - pw = getpwuid(getuid()); - if (pw == NULL || (user = pw->pw_dir) == NULL || user[0] == 0) - return 1; - file = _PATH_USEROPT; - pl = strlen(user) + strlen(file) + 2; - path = malloc(pl); - if (path == NULL) - novm("init file name"); - slprintf(path, pl, "%s/%s", user, file); - option_priority = OPRIO_CFGFILE; - ret = options_from_file(path, 0, 1, privileged); - free(path); - return ret; -} - -/* - * options_for_tty - See if an options file exists for the serial - * device, and if so, interpret options from it. - * We only allow the per-tty options file to override anything from - * the command line if it is something that the user can't override - * once it has been set by root; this is done by giving configuration - * files a lower priority than the command line. - */ -int -options_for_tty() -{ - char *dev, *path, *p; - int ret; - size_t pl; - - dev = devnam; - if (strncmp(dev, "/dev/", 5) == 0) - dev += 5; - if (dev[0] == 0 || strcmp(dev, "tty") == 0) - return 1; /* don't look for /etc/ppp/options.tty */ - pl = strlen(_PATH_TTYOPT) + strlen(dev) + 1; - path = malloc(pl); - if (path == NULL) - novm("tty init file name"); - slprintf(path, pl, "%s%s", _PATH_TTYOPT, dev); - /* Turn slashes into dots, for Solaris case (e.g. /dev/term/a) */ - for (p = path + strlen(_PATH_TTYOPT); *p != 0; ++p) - if (*p == '/') - *p = '.'; - option_priority = OPRIO_CFGFILE; - ret = options_from_file(path, 0, 0, 1); - free(path); - return ret; -} - -/* - * options_from_list - process a string of options in a wordlist. - */ -int -options_from_list(w, priv) - struct wordlist *w; - int priv; -{ - char *argv[MAXARGS]; - option_t *opt; - int i, n, ret = 0; - struct wordlist *w0; - - privileged_option = priv; - option_source = "secrets file"; - option_priority = OPRIO_SECFILE; - - while (w != NULL) { - opt = find_option(w->word); - if (opt == NULL) { - option_error("In secrets file: unrecognized option '%s'", - w->word); - goto err; - } - n = n_arguments(opt); - w0 = w; - for (i = 0; i < n; ++i) { - w = w->next; - if (w == NULL) { - option_error( - "In secrets file: too few parameters for option '%s'", - w0->word); - goto err; - } - argv[i] = w->word; - } - if (!process_option(opt, w0->word, argv)) - goto err; - w = w->next; - } - ret = 1; - -err: - return ret; -} - -/* - * match_option - see if this option matches an option_t structure. - */ -static int -match_option(name, opt, dowild) - char *name; - option_t *opt; - int dowild; -{ - int (*match) __P((char *, char **, int)); - - if (dowild != (opt->type == o_wild)) - return 0; - if (!dowild) - return strcmp(name, opt->name) == 0; - match = (int (*) __P((char *, char **, int))) opt->addr; - return (*match)(name, NULL, 0); -} - -/* - * find_option - scan the option lists for the various protocols - * looking for an entry with the given name. - * This could be optimized by using a hash table. - */ -static option_t * -find_option(name) - const char *name; -{ - option_t *opt; - struct option_list *list; - int i, dowild; - - for (dowild = 0; dowild <= 1; ++dowild) { - for (opt = general_options; opt->name != NULL; ++opt) - if (match_option(name, opt, dowild)) - return opt; - for (opt = auth_options; opt->name != NULL; ++opt) - if (match_option(name, opt, dowild)) - return opt; - for (list = extra_options; list != NULL; list = list->next) - for (opt = list->options; opt->name != NULL; ++opt) - if (match_option(name, opt, dowild)) - return opt; - for (opt = the_channel->options; opt->name != NULL; ++opt) - if (match_option(name, opt, dowild)) - return opt; - for (i = 0; protocols[i] != NULL; ++i) - if ((opt = protocols[i]->options) != NULL) - for (; opt->name != NULL; ++opt) - if (match_option(name, opt, dowild)) - return opt; - } - return NULL; -} - -/* - * process_option - process one new-style option. - */ -static int -process_option(opt, cmd, argv) - option_t *opt; - char *cmd; - char **argv; -{ - u_int32_t v; - int iv, a; - char *sv; - int (*parser) __P((char **)); - int (*wildp) __P((char *, char **, int)); - char *optopt = (opt->type == o_wild)? "": " option"; - int prio = option_priority; - option_t *mainopt = opt; - - if ((opt->flags & OPT_PRIVFIX) && privileged_option) - prio += OPRIO_ROOT; - while (mainopt->flags & OPT_PRIOSUB) - --mainopt; - if (mainopt->flags & OPT_PRIO) { - if (prio < mainopt->priority) { - /* new value doesn't override old */ - if (prio == OPRIO_CMDLINE && mainopt->priority > OPRIO_ROOT) { - option_error("%s%s set in %s cannot be overridden\n", - opt->name, optopt, mainopt->source); - return 0; - } - return 1; - } - if (prio > OPRIO_ROOT && mainopt->priority == OPRIO_CMDLINE) - warn("%s%s from %s overrides command line", - opt->name, optopt, option_source); - } - - if ((opt->flags & OPT_INITONLY) && phase != PHASE_INITIALIZE) { - option_error("%s%s cannot be changed after initialization", - opt->name, optopt); - return 0; - } - if ((opt->flags & OPT_PRIV) && !privileged_option) { - option_error("using the %s%s requires root privilege", - opt->name, optopt); - return 0; - } - if ((opt->flags & OPT_ENABLE) && *(bool *)(opt->addr2) == 0) { - option_error("%s%s is disabled", opt->name, optopt); - return 0; - } - if ((opt->flags & OPT_DEVEQUIV) && devnam_fixed) { - option_error("the %s%s may not be changed in %s", - opt->name, optopt, option_source); - return 0; - } - - switch (opt->type) { - case o_bool: - v = opt->flags & OPT_VALUE; - *(bool *)(opt->addr) = v; - if (opt->addr2 && (opt->flags & OPT_A2COPY)) - *(bool *)(opt->addr2) = v; - break; - - case o_int: - iv = 0; - if ((opt->flags & OPT_NOARG) == 0) { - if (!int_option(*argv, &iv)) - return 0; - if ((((opt->flags & OPT_LLIMIT) && iv < opt->lower_limit) - || ((opt->flags & OPT_ULIMIT) && iv > opt->upper_limit)) - && !((opt->flags & OPT_ZEROOK && iv == 0))) { - char *zok = (opt->flags & OPT_ZEROOK)? " zero or": ""; - switch (opt->flags & OPT_LIMITS) { - case OPT_LLIMIT: - option_error("%s value must be%s >= %d", - opt->name, zok, opt->lower_limit); - break; - case OPT_ULIMIT: - option_error("%s value must be%s <= %d", - opt->name, zok, opt->upper_limit); - break; - case OPT_LIMITS: - option_error("%s value must be%s between %d and %d", - opt->name, opt->lower_limit, opt->upper_limit); - break; - } - return 0; - } - } - a = opt->flags & OPT_VALUE; - if (a >= 128) - a -= 256; /* sign extend */ - iv += a; - if (opt->flags & OPT_INC) - iv += *(int *)(opt->addr); - if ((opt->flags & OPT_NOINCR) && !privileged_option) { - int oldv = *(int *)(opt->addr); - if ((opt->flags & OPT_ZEROINF) ? - (oldv != 0 && (iv == 0 || iv > oldv)) : (iv > oldv)) { - option_error("%s value cannot be increased", opt->name); - return 0; - } - } - *(int *)(opt->addr) = iv; - if (opt->addr2 && (opt->flags & OPT_A2COPY)) - *(int *)(opt->addr2) = iv; - break; - - case o_uint32: - if (opt->flags & OPT_NOARG) { - v = opt->flags & OPT_VALUE; - if (v & 0x80) - v |= 0xffffff00U; - } else if (!number_option(*argv, &v, 16)) - return 0; - if (opt->flags & OPT_OR) - v |= *(u_int32_t *)(opt->addr); - *(u_int32_t *)(opt->addr) = v; - if (opt->addr2 && (opt->flags & OPT_A2COPY)) - *(u_int32_t *)(opt->addr2) = v; - break; - - case o_string: - if (opt->flags & OPT_STATIC) { - strlcpy((char *)(opt->addr), *argv, opt->upper_limit); - } else { - sv = strdup(*argv); - if (sv == NULL) - novm("option argument"); - *(char **)(opt->addr) = sv; - } - break; - - case o_special_noarg: - case o_special: - parser = (int (*) __P((char **))) opt->addr; - if (!(*parser)(argv)) - return 0; - if (opt->flags & OPT_A2LIST) { - struct option_value *ovp, **pp; - - ovp = malloc(sizeof(*ovp) + strlen(*argv)); - if (ovp != 0) { - strcpy(ovp->value, *argv); - ovp->source = option_source; - ovp->next = NULL; - pp = (struct option_value **) &opt->addr2; - while (*pp != 0) - pp = &(*pp)->next; - *pp = ovp; - } - } - break; - - case o_wild: - wildp = (int (*) __P((char *, char **, int))) opt->addr; - if (!(*wildp)(cmd, argv, 1)) - return 0; - break; - } - - if (opt->addr2 && (opt->flags & (OPT_A2COPY|OPT_ENABLE - |OPT_A2PRINTER|OPT_A2STRVAL|OPT_A2LIST)) == 0) - *(bool *)(opt->addr2) = !(opt->flags & OPT_A2CLR); - - mainopt->source = option_source; - mainopt->priority = prio; - mainopt->winner = opt - mainopt; - - return 1; -} - -/* - * override_value - if the option priorities would permit us to - * override the value of option, return 1 and update the priority - * and source of the option value. Otherwise returns 0. - */ -int -override_value(option, priority, source) - const char *option; - int priority; - const char *source; -{ - option_t *opt; - - opt = find_option(option); - if (opt == NULL) - return 0; - while (opt->flags & OPT_PRIOSUB) - --opt; - if ((opt->flags & OPT_PRIO) && priority < opt->priority) - return 0; - opt->priority = priority; - opt->source = source; - opt->winner = -1; - return 1; -} - -/* - * n_arguments - tell how many arguments an option takes - */ -static int -n_arguments(opt) - option_t *opt; -{ - return (opt->type == o_bool || opt->type == o_special_noarg - || (opt->flags & OPT_NOARG))? 0: 1; -} - -/* - * add_options - add a list of options to the set we grok. - */ -void -add_options(opt) - option_t *opt; -{ - struct option_list *list; - - list = malloc(sizeof(*list)); - if (list == 0) - novm("option list entry"); - list->options = opt; - list->next = extra_options; - extra_options = list; -} - -/* - * check_options - check that options are valid and consistent. - */ -void -check_options() -{ - if (logfile_fd >= 0 && logfile_fd != log_to_fd) - close(logfile_fd); -} - -/* - * print_option - print out an option and its value - */ -static void -print_option(opt, mainopt, printer, arg) - option_t *opt, *mainopt; - void (*printer) __P((void *, char *, ...)); - void *arg; -{ - int i, v; - char *p; - - if (opt->flags & OPT_NOPRINT) - return; - switch (opt->type) { - case o_bool: - v = opt->flags & OPT_VALUE; - if (*(bool *)opt->addr != v) - /* this can happen legitimately, e.g. lock - option turned off for default device */ - break; - printer(arg, "%s", opt->name); - break; - case o_int: - v = opt->flags & OPT_VALUE; - if (v >= 128) - v -= 256; - i = *(int *)opt->addr; - if (opt->flags & OPT_NOARG) { - printer(arg, "%s", opt->name); - if (i != v) { - if (opt->flags & OPT_INC) { - for (; i > v; i -= v) - printer(arg, " %s", opt->name); - } else - printer(arg, " # oops: %d not %d\n", - i, v); - } - } else { - printer(arg, "%s %d", opt->name, i); - } - break; - case o_uint32: - printer(arg, "%s", opt->name); - if ((opt->flags & OPT_NOARG) == 0) - printer(arg, " %x", *(u_int32_t *)opt->addr); - break; - - case o_string: - if (opt->flags & OPT_HIDE) { - p = "??????"; - } else { - p = (char *) opt->addr; - if ((opt->flags & OPT_STATIC) == 0) - p = *(char **)p; - } - printer(arg, "%s %q", opt->name, p); - break; - - case o_special: - case o_special_noarg: - case o_wild: - if (opt->type != o_wild) { - printer(arg, "%s", opt->name); - if (n_arguments(opt) == 0) - break; - printer(arg, " "); - } - if (opt->flags & OPT_A2PRINTER) { - void (*oprt) __P((option_t *, - void ((*)__P((void *, char *, ...))), - void *)); - oprt = opt->addr2; - (*oprt)(opt, printer, arg); - } else if (opt->flags & OPT_A2STRVAL) { - p = (char *) opt->addr2; - if ((opt->flags & OPT_STATIC) == 0) - p = *(char **)p; - printer("%q", p); - } else if (opt->flags & OPT_A2LIST) { - struct option_value *ovp; - - ovp = (struct option_value *) opt->addr2; - for (;;) { - printer(arg, "%q", ovp->value); - if ((ovp = ovp->next) == NULL) - break; - printer(arg, "\t\t# (from %s)\n%s ", - ovp->source, opt->name); - } - } else { - printer(arg, "xxx # [don't know how to print value]"); - } - break; - - default: - printer(arg, "# %s value (type %d)", opt->name, opt->type); - break; - } - printer(arg, "\t\t# (from %s)\n", mainopt->source); -} - -/* - * print_option_list - print out options in effect from an - * array of options. - */ -static void -print_option_list(opt, printer, arg) - option_t *opt; - void (*printer) __P((void *, char *, ...)); - void *arg; -{ - while (opt->name != NULL) { - if (opt->priority != OPRIO_DEFAULT - && opt->winner != (short int) -1) - print_option(opt + opt->winner, opt, printer, arg); - do { - ++opt; - } while (opt->flags & OPT_PRIOSUB); - } -} - -/* - * print_options - print out what options are in effect. - */ -void -print_options(printer, arg) - void (*printer) __P((void *, char *, ...)); - void *arg; -{ - struct option_list *list; - int i; - - printer(arg, "pppd options in effect:\n"); - print_option_list(general_options, printer, arg); - print_option_list(auth_options, printer, arg); - for (list = extra_options; list != NULL; list = list->next) - print_option_list(list->options, printer, arg); - print_option_list(the_channel->options, printer, arg); - for (i = 0; protocols[i] != NULL; ++i) - print_option_list(protocols[i]->options, printer, arg); -} - -/* - * usage - print out a message telling how to use the program. - */ -static void -usage() -{ - if (phase == PHASE_INITIALIZE) - fprintf(stderr, usage_string, VERSION, progname); -} - -/* - * showhelp - print out usage message and exit. - */ -static int -showhelp(argv) - char **argv; -{ - if (phase == PHASE_INITIALIZE) { - usage(); - exit(0); - } - return 0; -} - -/* - * showversion - print out the version number and exit. - */ -static int -showversion(argv) - char **argv; -{ - if (phase == PHASE_INITIALIZE) { - fprintf(stderr, "pppd version %s\n", VERSION); - exit(0); - } - return 0; -} - -/* - * option_error - print a message about an error in an option. - * The message is logged, and also sent to - * stderr if phase == PHASE_INITIALIZE. - */ -void -option_error __V((char *fmt, ...)) -{ - va_list args; - char buf[1024]; - -#if defined(__STDC__) - va_start(args, fmt); -#else - char *fmt; - va_start(args); - fmt = va_arg(args, char *); -#endif - vslprintf(buf, sizeof(buf), fmt, args); - va_end(args); - if (phase == PHASE_INITIALIZE) - fprintf(stderr, "%s: %s\n", progname, buf); - syslog(LOG_ERR, "%s", buf); -} - -#if 0 -/* - * readable - check if a file is readable by the real user. - */ -int -readable(fd) - int fd; -{ - uid_t uid; - int i; - struct stat sbuf; - - uid = getuid(); - if (uid == 0) - return 1; - if (fstat(fd, &sbuf) != 0) - return 0; - if (sbuf.st_uid == uid) - return sbuf.st_mode & S_IRUSR; - if (sbuf.st_gid == getgid()) - return sbuf.st_mode & S_IRGRP; - for (i = 0; i < ngroups; ++i) - if (sbuf.st_gid == groups[i]) - return sbuf.st_mode & S_IRGRP; - return sbuf.st_mode & S_IROTH; -} -#endif - -/* - * Read a word from a file. - * Words are delimited by white-space or by quotes (" or '). - * Quotes, white-space and \ may be escaped with \. - * \<newline> is ignored. - */ -int -getword(f, word, newlinep, filename) - FILE *f; - char *word; - int *newlinep; - char *filename; -{ - int c, len, escape; - int quoted, comment; - int value, digit, got, n; - -#define isoctal(c) ((c) >= '0' && (c) < '8') - - *newlinep = 0; - len = 0; - escape = 0; - comment = 0; - - /* - * First skip white-space and comments. - */ - for (;;) { - c = getc(f); - if (c == EOF) - break; - - /* - * A newline means the end of a comment; backslash-newline - * is ignored. Note that we cannot have escape && comment. - */ - if (c == '\n') { - if (!escape) { - *newlinep = 1; - comment = 0; - } else - escape = 0; - continue; - } - - /* - * Ignore characters other than newline in a comment. - */ - if (comment) - continue; - - /* - * If this character is escaped, we have a word start. - */ - if (escape) - break; - - /* - * If this is the escape character, look at the next character. - */ - if (c == '\\') { - escape = 1; - continue; - } - - /* - * If this is the start of a comment, ignore the rest of the line. - */ - if (c == '#') { - comment = 1; - continue; - } - - /* - * A non-whitespace character is the start of a word. - */ - if (!isspace(c)) - break; - } - - /* - * Save the delimiter for quoted strings. - */ - if (!escape && (c == '"' || c == '\'')) { - quoted = c; - c = getc(f); - } else - quoted = 0; - - /* - * Process characters until the end of the word. - */ - while (c != EOF) { - if (escape) { - /* - * This character is escaped: backslash-newline is ignored, - * various other characters indicate particular values - * as for C backslash-escapes. - */ - escape = 0; - if (c == '\n') { - c = getc(f); - continue; - } - - got = 0; - switch (c) { - case 'a': - value = '\a'; - break; - case 'b': - value = '\b'; - break; - case 'f': - value = '\f'; - break; - case 'n': - value = '\n'; - break; - case 'r': - value = '\r'; - break; - case 's': - value = ' '; - break; - case 't': - value = '\t'; - break; - - default: - if (isoctal(c)) { - /* - * \ddd octal sequence - */ - value = 0; - for (n = 0; n < 3 && isoctal(c); ++n) { - value = (value << 3) + (c & 07); - c = getc(f); - } - got = 1; - break; - } - - if (c == 'x') { - /* - * \x<hex_string> sequence - */ - value = 0; - c = getc(f); - for (n = 0; n < 2 && isxdigit(c); ++n) { - digit = toupper(c) - '0'; - if (digit > 10) - digit += '0' + 10 - 'A'; - value = (value << 4) + digit; - c = getc (f); - } - got = 1; - break; - } - - /* - * Otherwise the character stands for itself. - */ - value = c; - break; - } - - /* - * Store the resulting character for the escape sequence. - */ - if (len < MAXWORDLEN-1) - word[len] = value; - ++len; - - if (!got) - c = getc(f); - continue; - - } - - /* - * Not escaped: see if we've reached the end of the word. - */ - if (quoted) { - if (c == quoted) - break; - } else { - if (isspace(c) || c == '#') { - ungetc (c, f); - break; - } - } - - /* - * Backslash starts an escape sequence. - */ - if (c == '\\') { - escape = 1; - c = getc(f); - continue; - } - - /* - * An ordinary character: store it in the word and get another. - */ - if (len < MAXWORDLEN-1) - word[len] = c; - ++len; - - c = getc(f); - } - - /* - * End of the word: check for errors. - */ - if (c == EOF) { - if (ferror(f)) { - if (errno == 0) - errno = EIO; - option_error("Error reading %s: %m", filename); - die(1); - } - /* - * If len is zero, then we didn't find a word before the - * end of the file. - */ - if (len == 0) - return 0; - } - - /* - * Warn if the word was too long, and append a terminating null. - */ - if (len >= MAXWORDLEN) { - option_error("warning: word in file %s too long (%.20s...)", - filename, word); - len = MAXWORDLEN - 1; - } - word[len] = 0; - - return 1; - -#undef isoctal - -} - -/* - * number_option - parse an unsigned numeric parameter for an option. - */ -static int -number_option(str, valp, base) - char *str; - u_int32_t *valp; - int base; -{ - char *ptr; - - *valp = strtoul(str, &ptr, base); - if (ptr == str) { - option_error("invalid numeric parameter '%s' for %s option", - str, current_option); - return 0; - } - return 1; -} - - -/* - * int_option - like number_option, but valp is int *, - * the base is assumed to be 0, and *valp is not changed - * if there is an error. - */ -int -int_option(str, valp) - char *str; - int *valp; -{ - u_int32_t v; - - if (!number_option(str, &v, 0)) - return 0; - *valp = (int) v; - return 1; -} - - -/* - * The following procedures parse options. - */ - -/* - * readfile - take commands from a file. - */ -static int -readfile(argv) - char **argv; -{ - return options_from_file(*argv, 1, 1, privileged_option); -} - -/* - * callfile - take commands from /etc/ppp/peers/<name>. - * Name may not contain /../, start with / or ../, or end in /.. - */ -static int -callfile(argv) - char **argv; -{ - char *fname, *arg, *p; - int l, ok; - - arg = *argv; - ok = 1; - if (arg[0] == '/' || arg[0] == 0) - ok = 0; - else { - for (p = arg; *p != 0; ) { - if (p[0] == '.' && p[1] == '.' && (p[2] == '/' || p[2] == 0)) { - ok = 0; - break; - } - while (*p != '/' && *p != 0) - ++p; - if (*p == '/') - ++p; - } - } - if (!ok) { - option_error("call option value may not contain .. or start with /"); - return 0; - } - - l = strlen(arg) + strlen(_PATH_PEERFILES) + 1; - if ((fname = (char *) malloc(l)) == NULL) - novm("call file name"); - slprintf(fname, l, "%s%s", _PATH_PEERFILES, arg); - - ok = options_from_file(fname, 1, 1, 1); - - free(fname); - return ok; -} - -#ifdef PPP_FILTER -/* - * setpassfilter - Set the pass filter for packets - */ -static int -setpassfilter(argv) - char **argv; -{ - pc.linktype = DLT_PPP; - pc.snapshot = PPP_HDRLEN; - - if (pcap_compile(&pc, &pass_filter, *argv, 1, netmask) == 0) - return 1; - option_error("error in pass-filter expression: %s\n", pcap_geterr(&pc)); - return 0; -} - -/* - * setactivefilter - Set the active filter for packets - */ -static int -setactivefilter(argv) - char **argv; -{ - pc.linktype = DLT_PPP; - pc.snapshot = PPP_HDRLEN; - - if (pcap_compile(&pc, &active_filter, *argv, 1, netmask) == 0) - return 1; - option_error("error in active-filter expression: %s\n", pcap_geterr(&pc)); - return 0; -} -#endif - -/* - * setdomain - Set domain name to append to hostname - */ -static int -setdomain(argv) - char **argv; -{ - gethostname(hostname, MAXNAMELEN); - if (**argv != 0) { - if (**argv != '.') - strncat(hostname, ".", MAXNAMELEN - strlen(hostname)); - domain = hostname + strlen(hostname); - strncat(hostname, *argv, MAXNAMELEN - strlen(hostname)); - } - hostname[MAXNAMELEN-1] = 0; - return (1); -} - - -static int -setlogfile(argv) - char **argv; -{ - int fd, err; - - if (!privileged_option) - seteuid(getuid()); - fd = open(*argv, O_WRONLY | O_APPEND | O_CREAT | O_EXCL, 0644); - if (fd < 0 && errno == EEXIST) - fd = open(*argv, O_WRONLY | O_APPEND); - err = errno; - if (!privileged_option) - seteuid(0); - if (fd < 0) { - errno = err; - option_error("Can't open log file %s: %m", *argv); - return 0; - } - strlcpy(logfile_name, *argv, sizeof(logfile_name)); - if (logfile_fd >= 0) - close(logfile_fd); - logfile_fd = fd; - log_to_fd = fd; - log_default = 0; - return 1; -} - -#ifdef PLUGIN -static int -loadplugin(argv) - char **argv; -{ - char *arg = *argv; - void *handle; - const char *err; - void (*init) __P((void)); - char *path = arg; - const char *vers; - - if (strchr(arg, '/') == 0) { - const char *base = _PATH_PLUGIN; - int l = strlen(base) + strlen(arg) + 2; - path = malloc(l); - if (path == 0) - novm("plugin file path"); - strlcpy(path, base, l); - strlcat(path, "/", l); - strlcat(path, arg, l); - } - handle = dlopen(path, RTLD_GLOBAL | RTLD_NOW); - if (handle == 0) { - err = dlerror(); - if (err != 0) - option_error("%s", err); - option_error("Couldn't load plugin %s", arg); - goto err; - } - init = (void (*)(void))dlsym(handle, "plugin_init"); - if (init == 0) { - option_error("%s has no initialization entry point", arg); - goto errclose; - } - vers = (const char *) dlsym(handle, "pppd_version"); - if (vers == 0) { - warn("Warning: plugin %s has no version information", arg); - } else if (strcmp(vers, VERSION) != 0) { - option_error("Plugin %s is for pppd version %s, this is %s", - vers, VERSION); - goto errclose; - } - info("Plugin %s loaded.", arg); - (*init)(); - return 1; - - errclose: - dlclose(handle); - err: - if (path != arg) - free(path); - return 0; -} -#endif /* PLUGIN */ |