[d0950ad] | 1 | /* |
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| 2 | * options.c - handles option processing for PPP. |
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| 3 | * |
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| 4 | * Copyright (c) 1989 Carnegie Mellon University. |
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| 5 | * All rights reserved. |
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| 6 | * |
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| 7 | * Redistribution and use in source and binary forms are permitted |
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| 8 | * provided that the above copyright notice and this paragraph are |
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| 9 | * duplicated in all such forms and that any documentation, |
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| 10 | * advertising materials, and other materials related to such |
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| 11 | * distribution and use acknowledge that the software was developed |
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| 12 | * by Carnegie Mellon University. The name of the |
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| 13 | * University may not be used to endorse or promote products derived |
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| 14 | * from this software without specific prior written permission. |
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| 15 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
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| 16 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
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| 17 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
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| 18 | */ |
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| 19 | |
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[2f1b930] | 20 | #define RCSID "$Id$" |
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[d0950ad] | 21 | |
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| 22 | #include <ctype.h> |
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| 23 | #include <stdio.h> |
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| 24 | #include <errno.h> |
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| 25 | #include <unistd.h> |
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[2f1b930] | 26 | #include <fcntl.h> |
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| 27 | #include <stdlib.h> |
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[d0950ad] | 28 | #include <termios.h> |
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| 29 | #include <string.h> |
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| 30 | #include <netdb.h> |
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| 31 | #include <pwd.h> |
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| 32 | #include <sys/types.h> |
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| 33 | #include <sys/stat.h> |
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| 34 | #include <netinet/in.h> |
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| 35 | #include <arpa/inet.h> |
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[2f1b930] | 36 | #ifdef PLUGIN |
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| 37 | #include <dlfcn.h> |
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| 38 | #endif |
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[d0950ad] | 39 | #ifdef PPP_FILTER |
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| 40 | #include <pcap.h> |
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| 41 | #include <pcap-int.h> /* XXX: To get struct pcap */ |
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| 42 | #endif |
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| 43 | |
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| 44 | #include "pppd.h" |
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| 45 | #include "pathnames.h" |
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| 46 | #include "patchlevel.h" |
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| 47 | #include "fsm.h" |
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| 48 | #include "lcp.h" |
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| 49 | #include "ipcp.h" |
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| 50 | #include "upap.h" |
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| 51 | #include "chap.h" |
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| 52 | #include "ccp.h" |
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| 53 | |
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[ed92e28] | 54 | #include <net/ppp_comp.h> |
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[d0950ad] | 55 | |
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[2f1b930] | 56 | static const char rcsid[] = RCSID; |
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| 57 | |
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[d0950ad] | 58 | /* |
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| 59 | * Option variables and default values. |
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| 60 | */ |
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| 61 | #ifdef PPP_FILTER |
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| 62 | int dflag = 0; /* Tell libpcap we want debugging */ |
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| 63 | #endif |
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[2f1b930] | 64 | int debug = 0; /* Debug flag */ |
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| 65 | int kdebugflag = 0; /* Tell kernel to print debug messages */ |
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[d0950ad] | 66 | int default_device = 1; /* Using /dev/tty or equivalent */ |
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[2f1b930] | 67 | char devnam[MAXPATHLEN]; /* Device name */ |
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[d0950ad] | 68 | int crtscts = 0; /* Use hardware flow control */ |
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[2f1b930] | 69 | bool modem = 1; /* Use modem control lines */ |
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| 70 | int inspeed = 0; /* Input/Output speed requested */ |
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[d0950ad] | 71 | u_int32_t netmask = 0; /* IP netmask to set on interface */ |
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[2f1b930] | 72 | bool lockflag = 0; /* Create lock file to lock the serial dev */ |
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| 73 | bool nodetach = 0; /* Don't detach from controlling tty */ |
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| 74 | bool updetach = 0; /* Detach once link is up */ |
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| 75 | char *initializer = NULL; /* Script to initialize physical link */ |
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| 76 | char *connect_script = NULL; /* Script to establish physical link */ |
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| 77 | char *disconnect_script = NULL; /* Script to disestablish physical link */ |
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| 78 | char *welcomer = NULL; /* Script to run after phys link estab. */ |
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| 79 | char *ptycommand = NULL; /* Command to run on other side of pty */ |
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[d0950ad] | 80 | int maxconnect = 0; /* Maximum connect time */ |
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[2f1b930] | 81 | char user[MAXNAMELEN]; /* Username for PAP */ |
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| 82 | char passwd[MAXSECRETLEN]; /* Password for PAP */ |
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| 83 | bool persist = 0; /* Reopen link after it goes down */ |
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| 84 | char our_name[MAXNAMELEN]; /* Our name for authentication purposes */ |
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| 85 | bool demand = 0; /* do dial-on-demand */ |
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[d0950ad] | 86 | char *ipparam = NULL; /* Extra parameter for ip up/down scripts */ |
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| 87 | int idle_time_limit = 0; /* Disconnect if idle for this many seconds */ |
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| 88 | int holdoff = 30; /* # seconds to pause before reconnecting */ |
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[2f1b930] | 89 | bool holdoff_specified; /* true if a holdoff value has been given */ |
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| 90 | bool notty = 0; /* Stdin/out is not a tty */ |
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| 91 | char *record_file = NULL; /* File to record chars sent/received */ |
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| 92 | int using_pty = 0; |
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| 93 | bool sync_serial = 0; /* Device is synchronous serial device */ |
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| 94 | int log_to_fd = 1; /* send log messages to this fd too */ |
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| 95 | int maxfail = 10; /* max # of unsuccessful connection attempts */ |
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| 96 | char linkname[MAXPATHLEN]; /* logical name for link */ |
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| 97 | bool tune_kernel; /* may alter kernel settings */ |
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| 98 | int connect_delay = 1000; /* wait this many ms after connect script */ |
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[d0950ad] | 99 | |
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[2f1b930] | 100 | extern option_t auth_options[]; |
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| 101 | extern struct stat devstat; |
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| 102 | extern int prepass; /* Doing pre-pass to find device name */ |
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[d0950ad] | 103 | |
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[2f1b930] | 104 | struct option_info initializer_info; |
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| 105 | struct option_info connect_script_info; |
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| 106 | struct option_info disconnect_script_info; |
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[d0950ad] | 107 | struct option_info welcomer_info; |
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| 108 | struct option_info devnam_info; |
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[2f1b930] | 109 | struct option_info ptycommand_info; |
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| 110 | |
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[d0950ad] | 111 | #ifdef PPP_FILTER |
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| 112 | struct bpf_program pass_filter;/* Filter program for packets to pass */ |
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| 113 | struct bpf_program active_filter; /* Filter program for link-active pkts */ |
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| 114 | pcap_t pc; /* Fake struct pcap so we can compile expr */ |
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| 115 | #endif |
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| 116 | |
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[2f1b930] | 117 | char *current_option; /* the name of the option being parsed */ |
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| 118 | int privileged_option; /* set iff the current option came from root */ |
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| 119 | char *option_source; /* string saying where the option came from */ |
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| 120 | bool log_to_file; /* log_to_fd is a file opened by us */ |
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| 121 | |
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[d0950ad] | 122 | /* |
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| 123 | * Prototypes |
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| 124 | */ |
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[d08e825b] | 125 | static int setdevname(char *); |
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| 126 | static int setipaddr(char *); |
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| 127 | static int setspeed(char *); |
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| 128 | static int noopt(char **); |
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| 129 | static int setdomain(char **); |
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| 130 | static int setnetmask(char **); |
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| 131 | static int setxonxoff(char **); |
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| 132 | static int readfile(char **); |
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| 133 | static int callfile(char **); |
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| 134 | static void usage(void); |
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| 135 | static int setlogfile(char **); |
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[2f1b930] | 136 | #ifdef PLUGIN |
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[d08e825b] | 137 | static int loadplugin(char **); |
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[2f1b930] | 138 | #endif |
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[d0950ad] | 139 | |
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| 140 | #ifdef PPP_FILTER |
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[d08e825b] | 141 | static int setpassfilter(char **); |
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| 142 | static int setactivefilter(char **); |
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[d0950ad] | 143 | #endif |
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| 144 | |
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[d08e825b] | 145 | static option_t *find_option(char *name); |
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| 146 | static int process_option(option_t *, char **); |
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| 147 | static int n_arguments(option_t *); |
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| 148 | static int number_option(char *, u_int32_t *, int); |
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[2f1b930] | 149 | |
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| 150 | /* |
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| 151 | * Structure to store extra lists of options. |
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| 152 | */ |
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| 153 | struct option_list { |
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| 154 | option_t *options; |
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| 155 | struct option_list *next; |
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| 156 | }; |
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| 157 | |
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| 158 | static struct option_list *extra_options = NULL; |
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[d0950ad] | 159 | |
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| 160 | /* |
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| 161 | * Valid arguments. |
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| 162 | */ |
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[2f1b930] | 163 | option_t general_options[] = { |
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| 164 | { "debug", o_int, &debug, |
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| 165 | "Increase debugging level", OPT_INC|OPT_NOARG|1 }, |
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| 166 | { "-d", o_int, &debug, |
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| 167 | "Increase debugging level", OPT_INC|OPT_NOARG|1 }, |
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| 168 | { "kdebug", o_int, &kdebugflag, |
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| 169 | "Set kernel driver debug level" }, |
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| 170 | { "nodetach", o_bool, &nodetach, |
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| 171 | "Don't detach from controlling tty", 1 }, |
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| 172 | { "-detach", o_bool, &nodetach, |
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| 173 | "Don't detach from controlling tty", 1 }, |
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| 174 | { "updetach", o_bool, &updetach, |
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| 175 | "Detach from controlling tty once link is up", 1 }, |
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| 176 | { "holdoff", o_int, &holdoff, |
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| 177 | "Set time in seconds before retrying connection" }, |
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| 178 | { "idle", o_int, &idle_time_limit, |
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| 179 | "Set time in seconds before disconnecting idle link" }, |
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| 180 | { "lock", o_bool, &lockflag, |
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| 181 | "Lock serial device with UUCP-style lock file", 1 }, |
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| 182 | { "-all", o_special_noarg, noopt, |
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| 183 | "Don't request/allow any LCP or IPCP options (useless)" }, |
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| 184 | { "init", o_string, &initializer, |
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| 185 | "A program to initialize the device", |
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| 186 | OPT_A2INFO | OPT_PRIVFIX, &initializer_info }, |
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| 187 | { "connect", o_string, &connect_script, |
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| 188 | "A program to set up a connection", |
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| 189 | OPT_A2INFO | OPT_PRIVFIX, &connect_script_info }, |
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| 190 | { "disconnect", o_string, &disconnect_script, |
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| 191 | "Program to disconnect serial device", |
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| 192 | OPT_A2INFO | OPT_PRIVFIX, &disconnect_script_info }, |
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| 193 | { "welcome", o_string, &welcomer, |
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| 194 | "Script to welcome client", |
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| 195 | OPT_A2INFO | OPT_PRIVFIX, &welcomer_info }, |
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| 196 | { "pty", o_string, &ptycommand, |
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| 197 | "Script to run on pseudo-tty master side", |
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| 198 | OPT_A2INFO | OPT_PRIVFIX | OPT_DEVNAM, &ptycommand_info }, |
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| 199 | { "notty", o_bool, ¬ty, |
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| 200 | "Input/output is not a tty", OPT_DEVNAM | 1 }, |
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| 201 | { "record", o_string, &record_file, |
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| 202 | "Record characters sent/received to file" }, |
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| 203 | { "maxconnect", o_int, &maxconnect, |
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| 204 | "Set connection time limit", OPT_LLIMIT|OPT_NOINCR|OPT_ZEROINF }, |
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| 205 | { "crtscts", o_int, &crtscts, |
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| 206 | "Set hardware (RTS/CTS) flow control", OPT_NOARG|OPT_VAL(1) }, |
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| 207 | { "nocrtscts", o_int, &crtscts, |
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| 208 | "Disable hardware flow control", OPT_NOARG|OPT_VAL(-1) }, |
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| 209 | { "-crtscts", o_int, &crtscts, |
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| 210 | "Disable hardware flow control", OPT_NOARG|OPT_VAL(-1) }, |
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| 211 | { "cdtrcts", o_int, &crtscts, |
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| 212 | "Set alternate hardware (DTR/CTS) flow control", OPT_NOARG|OPT_VAL(2) }, |
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| 213 | { "nocdtrcts", o_int, &crtscts, |
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| 214 | "Disable hardware flow control", OPT_NOARG|OPT_VAL(-1) }, |
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| 215 | { "xonxoff", o_special_noarg, setxonxoff, |
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| 216 | "Set software (XON/XOFF) flow control" }, |
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| 217 | { "domain", o_special, setdomain, |
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| 218 | "Add given domain name to hostname" }, |
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| 219 | { "mtu", o_int, &lcp_allowoptions[0].mru, |
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| 220 | "Set our MTU", OPT_LIMITS, NULL, MAXMRU, MINMRU }, |
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| 221 | { "netmask", o_special, setnetmask, |
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| 222 | "set netmask" }, |
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| 223 | { "modem", o_bool, &modem, |
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| 224 | "Use modem control lines", 1 }, |
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| 225 | { "local", o_bool, &modem, |
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| 226 | "Don't use modem control lines" }, |
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| 227 | { "file", o_special, readfile, |
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| 228 | "Take options from a file", OPT_PREPASS }, |
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| 229 | { "call", o_special, callfile, |
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| 230 | "Take options from a privileged file", OPT_PREPASS }, |
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| 231 | { "persist", o_bool, &persist, |
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| 232 | "Keep on reopening connection after close", 1 }, |
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| 233 | { "nopersist", o_bool, &persist, |
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| 234 | "Turn off persist option" }, |
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| 235 | { "demand", o_bool, &demand, |
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| 236 | "Dial on demand", OPT_INITONLY | 1, &persist }, |
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| 237 | { "sync", o_bool, &sync_serial, |
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| 238 | "Use synchronous HDLC serial encoding", 1 }, |
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| 239 | { "logfd", o_int, &log_to_fd, |
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| 240 | "Send log messages to this file descriptor" }, |
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| 241 | { "logfile", o_special, setlogfile, |
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| 242 | "Append log messages to this file" }, |
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| 243 | { "nolog", o_int, &log_to_fd, |
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| 244 | "Don't send log messages to any file", |
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| 245 | OPT_NOARG | OPT_VAL(-1) }, |
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| 246 | { "nologfd", o_int, &log_to_fd, |
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| 247 | "Don't send log messages to any file descriptor", |
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| 248 | OPT_NOARG | OPT_VAL(-1) }, |
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| 249 | { "linkname", o_string, linkname, |
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| 250 | "Set logical name for link", |
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| 251 | OPT_PRIV|OPT_STATIC, NULL, MAXPATHLEN }, |
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| 252 | { "maxfail", o_int, &maxfail, |
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| 253 | "Maximum number of unsuccessful connection attempts to allow" }, |
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| 254 | { "ktune", o_bool, &tune_kernel, |
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| 255 | "Alter kernel settings as necessary", 1 }, |
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| 256 | { "noktune", o_bool, &tune_kernel, |
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| 257 | "Don't alter kernel settings", 0 }, |
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| 258 | { "connect-delay", o_int, &connect_delay, |
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| 259 | "Maximum time (in ms) to wait after connect script finishes" }, |
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| 260 | #ifdef PLUGIN |
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| 261 | { "plugin", o_special, loadplugin, |
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| 262 | "Load a plug-in module into pppd", OPT_PRIV }, |
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| 263 | #endif |
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| 264 | |
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| 265 | #ifdef PPP_FILTER |
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| 266 | { "pdebug", o_int, &dflag, |
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| 267 | "libpcap debugging" }, |
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| 268 | { "pass-filter", 1, setpassfilter, |
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| 269 | "set filter for packets to pass" }, |
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| 270 | { "active-filter", 1, setactivefilter, |
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| 271 | "set filter for active pkts" }, |
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| 272 | #endif |
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| 273 | |
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| 274 | { NULL } |
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| 275 | }; |
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| 276 | |
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| 277 | #ifndef IMPLEMENTATION |
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| 278 | #define IMPLEMENTATION "" |
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| 279 | #endif |
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| 280 | |
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| 281 | static char *usage_string = "\ |
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| 282 | pppd version %s.%d%s\n\ |
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| 283 | Usage: %s [ options ], where options are:\n\ |
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| 284 | <device> Communicate over the named device\n\ |
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| 285 | <speed> Set the baud rate to <speed>\n\ |
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| 286 | <loc>:<rem> Set the local and/or remote interface IP\n\ |
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| 287 | addresses. Either one may be omitted.\n\ |
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| 288 | asyncmap <n> Set the desired async map to hex <n>\n\ |
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| 289 | auth Require authentication from peer\n\ |
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| 290 | connect <p> Invoke shell command <p> to set up the serial line\n\ |
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| 291 | crtscts Use hardware RTS/CTS flow control\n\ |
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| 292 | defaultroute Add default route through interface\n\ |
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| 293 | file <f> Take options from file <f>\n\ |
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| 294 | modem Use modem control lines\n\ |
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| 295 | mru <n> Set MRU value to <n> for negotiation\n\ |
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| 296 | See pppd(8) for more options.\n\ |
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| 297 | "; |
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| 298 | |
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[d0950ad] | 299 | /* |
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| 300 | * parse_args - parse a string of arguments from the command line. |
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[2f1b930] | 301 | * If prepass is true, we are scanning for the device name and only |
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| 302 | * processing a few options, so error messages are suppressed. |
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[d0950ad] | 303 | */ |
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| 304 | int |
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| 305 | parse_args(argc, argv) |
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| 306 | int argc; |
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| 307 | char **argv; |
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| 308 | { |
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[2f1b930] | 309 | char *arg; |
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| 310 | option_t *opt; |
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| 311 | int ret; |
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| 312 | |
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| 313 | privileged_option = privileged; |
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| 314 | option_source = "command line"; |
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| 315 | while (argc > 0) { |
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| 316 | arg = *argv++; |
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| 317 | --argc; |
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[d0950ad] | 318 | |
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[2f1b930] | 319 | /* |
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| 320 | * First see if it's an option in the new option list. |
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| 321 | */ |
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| 322 | opt = find_option(arg); |
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| 323 | if (opt != NULL) { |
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| 324 | int n = n_arguments(opt); |
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| 325 | if (argc < n) { |
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| 326 | option_error("too few parameters for option %s", arg); |
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| 327 | return 0; |
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| 328 | } |
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| 329 | current_option = arg; |
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| 330 | if (!process_option(opt, argv)) |
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| 331 | return 0; |
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| 332 | argc -= n; |
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| 333 | argv += n; |
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| 334 | continue; |
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| 335 | } |
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[d0950ad] | 336 | |
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[2f1b930] | 337 | /* |
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| 338 | * Maybe a tty name, speed or IP address? |
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| 339 | */ |
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| 340 | if ((ret = setdevname(arg)) == 0 |
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| 341 | && (ret = setspeed(arg)) == 0 |
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| 342 | && (ret = setipaddr(arg)) == 0 |
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| 343 | && !prepass) { |
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| 344 | option_error("unrecognized option '%s'", arg); |
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| 345 | usage(); |
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| 346 | return 0; |
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| 347 | } |
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| 348 | if (ret < 0) /* error */ |
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| 349 | return 0; |
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| 350 | } |
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| 351 | return 1; |
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[d0950ad] | 352 | } |
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| 353 | |
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[2f1b930] | 354 | #if 0 |
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[d0950ad] | 355 | /* |
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| 356 | * scan_args - scan the command line arguments to get the tty name, |
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[2f1b930] | 357 | * if specified. Also checks whether the notty or pty option was given. |
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[d0950ad] | 358 | */ |
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[2f1b930] | 359 | void |
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| 360 | scan_args(argc, argv) |
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| 361 | int argc; |
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| 362 | char **argv; |
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| 363 | { |
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| 364 | char *arg; |
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| 365 | option_t *opt; |
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| 366 | |
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| 367 | privileged_option = privileged; |
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| 368 | while (argc > 0) { |
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| 369 | arg = *argv++; |
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| 370 | --argc; |
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| 371 | |
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| 372 | if (strcmp(arg, "notty") == 0 || strcmp(arg, "pty") == 0) |
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| 373 | using_pty = 1; |
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| 374 | |
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| 375 | /* Skip options and their arguments */ |
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| 376 | opt = find_option(arg); |
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| 377 | if (opt != NULL) { |
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| 378 | int n = n_arguments(opt); |
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| 379 | argc -= n; |
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| 380 | argv += n; |
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| 381 | continue; |
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| 382 | } |
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| 383 | |
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| 384 | /* Check if it's a tty name and copy it if so */ |
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| 385 | (void) setdevname(arg, 1); |
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| 386 | } |
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| 387 | } |
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| 388 | #endif |
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[d0950ad] | 389 | |
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| 390 | /* |
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[2f1b930] | 391 | * options_from_file - Read a string of options from a file, |
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| 392 | * and interpret them. |
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[d0950ad] | 393 | */ |
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[2f1b930] | 394 | int |
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| 395 | options_from_file(filename, must_exist, check_prot, priv) |
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| 396 | char *filename; |
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| 397 | int must_exist; |
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| 398 | int check_prot; |
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| 399 | int priv; |
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[d0950ad] | 400 | { |
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[2f1b930] | 401 | FILE *f; |
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| 402 | int i, newline, ret, err; |
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| 403 | option_t *opt; |
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| 404 | int oldpriv; |
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| 405 | char *oldsource; |
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| 406 | char *argv[MAXARGS]; |
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| 407 | char args[MAXARGS][MAXWORDLEN]; |
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| 408 | char cmd[MAXWORDLEN]; |
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| 409 | |
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| 410 | f = fopen(filename, "r"); |
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| 411 | err = errno; |
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| 412 | if (f == NULL) { |
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| 413 | if (!must_exist && err == ENOENT) |
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| 414 | return 1; |
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| 415 | errno = err; |
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| 416 | option_error("Can't open options file %s: %m", filename); |
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| 417 | return 0; |
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| 418 | } |
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| 419 | |
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| 420 | oldpriv = privileged_option; |
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| 421 | privileged_option = priv; |
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| 422 | oldsource = option_source; |
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| 423 | option_source = strdup(filename); |
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| 424 | if (option_source == NULL) |
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| 425 | option_source = "file"; |
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| 426 | ret = 0; |
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| 427 | while (getword(f, cmd, &newline, filename)) { |
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| 428 | /* |
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| 429 | * First see if it's a command. |
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| 430 | */ |
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| 431 | opt = find_option(cmd); |
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| 432 | if (opt != NULL) { |
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| 433 | int n = n_arguments(opt); |
---|
| 434 | for (i = 0; i < n; ++i) { |
---|
| 435 | if (!getword(f, args[i], &newline, filename)) { |
---|
| 436 | option_error( |
---|
| 437 | "In file %s: too few parameters for option '%s'", |
---|
| 438 | filename, cmd); |
---|
| 439 | goto err; |
---|
| 440 | } |
---|
| 441 | argv[i] = args[i]; |
---|
| 442 | } |
---|
| 443 | current_option = cmd; |
---|
| 444 | if ((opt->flags & OPT_DEVEQUIV) && devnam_fixed) { |
---|
| 445 | option_error("the %s option may not be used in the %s file", |
---|
| 446 | cmd, filename); |
---|
| 447 | goto err; |
---|
| 448 | } |
---|
| 449 | if (!process_option(opt, argv)) |
---|
| 450 | goto err; |
---|
| 451 | continue; |
---|
| 452 | } |
---|
| 453 | |
---|
| 454 | /* |
---|
| 455 | * Maybe a tty name, speed or IP address? |
---|
| 456 | */ |
---|
| 457 | if ((i = setdevname(cmd)) == 0 |
---|
| 458 | && (i = setspeed(cmd)) == 0 |
---|
| 459 | && (i = setipaddr(cmd)) == 0) { |
---|
| 460 | option_error("In file %s: unrecognized option '%s'", |
---|
| 461 | filename, cmd); |
---|
| 462 | goto err; |
---|
| 463 | } |
---|
| 464 | if (i < 0) /* error */ |
---|
| 465 | goto err; |
---|
| 466 | } |
---|
| 467 | ret = 1; |
---|
| 468 | |
---|
| 469 | err: |
---|
| 470 | fclose(f); |
---|
| 471 | privileged_option = oldpriv; |
---|
| 472 | option_source = oldsource; |
---|
| 473 | return ret; |
---|
| 474 | } |
---|
[d0950ad] | 475 | |
---|
| 476 | /* |
---|
[2f1b930] | 477 | * options_from_user - See if the use has a ~/.ppprc file, |
---|
| 478 | * and if so, interpret options from it. |
---|
[d0950ad] | 479 | */ |
---|
[2f1b930] | 480 | int |
---|
| 481 | options_from_user() |
---|
[d0950ad] | 482 | { |
---|
| 483 | return 0; |
---|
| 484 | } |
---|
| 485 | |
---|
| 486 | /* |
---|
[2f1b930] | 487 | * options_for_tty - See if an options file exists for the serial |
---|
| 488 | * device, and if so, interpret options from it. |
---|
| 489 | */ |
---|
| 490 | int |
---|
| 491 | options_for_tty() |
---|
| 492 | { |
---|
| 493 | char *dev, *path, *p; |
---|
| 494 | int ret; |
---|
| 495 | size_t pl; |
---|
| 496 | |
---|
| 497 | dev = devnam; |
---|
| 498 | if (strncmp(dev, "/dev/", 5) == 0) |
---|
| 499 | dev += 5; |
---|
| 500 | if (dev[0] == 0 || strcmp(dev, "tty") == 0) |
---|
| 501 | return 1; /* don't look for /etc/ppp/options.tty */ |
---|
| 502 | pl = strlen(_PATH_TTYOPT) + strlen(dev) + 1; |
---|
| 503 | path = malloc(pl); |
---|
| 504 | if (path == NULL) |
---|
| 505 | novm("tty init file name"); |
---|
| 506 | slprintf(path, pl, "%s%s", _PATH_TTYOPT, dev); |
---|
| 507 | /* Turn slashes into dots, for Solaris case (e.g. /dev/term/a) */ |
---|
| 508 | for (p = path + strlen(_PATH_TTYOPT); *p != 0; ++p) |
---|
| 509 | if (*p == '/') |
---|
| 510 | *p = '.'; |
---|
| 511 | ret = options_from_file(path, 0, 0, 1); |
---|
| 512 | free(path); |
---|
| 513 | return ret; |
---|
| 514 | } |
---|
| 515 | |
---|
| 516 | /* |
---|
| 517 | * options_from_list - process a string of options in a wordlist. |
---|
| 518 | */ |
---|
| 519 | int |
---|
| 520 | options_from_list(w, priv) |
---|
| 521 | struct wordlist *w; |
---|
| 522 | int priv; |
---|
| 523 | { |
---|
| 524 | char *argv[MAXARGS]; |
---|
| 525 | option_t *opt; |
---|
| 526 | int i, ret = 0; |
---|
| 527 | |
---|
| 528 | privileged_option = priv; |
---|
| 529 | option_source = "secrets file"; |
---|
| 530 | |
---|
| 531 | while (w != NULL) { |
---|
| 532 | /* |
---|
| 533 | * First see if it's a command. |
---|
| 534 | */ |
---|
| 535 | opt = find_option(w->word); |
---|
| 536 | if (opt != NULL) { |
---|
| 537 | int n = n_arguments(opt); |
---|
| 538 | struct wordlist *w0 = w; |
---|
| 539 | for (i = 0; i < n; ++i) { |
---|
| 540 | w = w->next; |
---|
| 541 | if (w == NULL) { |
---|
| 542 | option_error( |
---|
| 543 | "In secrets file: too few parameters for option '%s'", |
---|
| 544 | w0->word); |
---|
| 545 | goto err; |
---|
| 546 | } |
---|
| 547 | argv[i] = w->word; |
---|
| 548 | } |
---|
| 549 | current_option = w0->word; |
---|
| 550 | if (!process_option(opt, argv)) |
---|
| 551 | goto err; |
---|
| 552 | w = w->next; |
---|
| 553 | continue; |
---|
| 554 | } |
---|
| 555 | |
---|
| 556 | /* |
---|
| 557 | * Maybe a tty name, speed or IP address? |
---|
| 558 | */ |
---|
| 559 | if ((i = setdevname(w->word)) == 0 |
---|
| 560 | && (i = setspeed(w->word)) == 0 |
---|
| 561 | && (i = setipaddr(w->word)) == 0) { |
---|
| 562 | option_error("In secrets file: unrecognized option '%s'", |
---|
| 563 | w->word); |
---|
| 564 | goto err; |
---|
| 565 | } |
---|
| 566 | if (i < 0) /* error */ |
---|
| 567 | goto err; |
---|
| 568 | w = w->next; |
---|
| 569 | } |
---|
| 570 | ret = 1; |
---|
| 571 | |
---|
| 572 | err: |
---|
| 573 | return ret; |
---|
| 574 | } |
---|
| 575 | |
---|
| 576 | /* |
---|
| 577 | * find_option - scan the option lists for the various protocols |
---|
| 578 | * looking for an entry with the given name. |
---|
| 579 | * This could be optimized by using a hash table. |
---|
| 580 | */ |
---|
| 581 | static option_t * |
---|
| 582 | find_option(name) |
---|
| 583 | char *name; |
---|
| 584 | { |
---|
| 585 | option_t *opt; |
---|
| 586 | struct option_list *list; |
---|
| 587 | int i; |
---|
| 588 | |
---|
| 589 | for (list = extra_options; list != NULL; list = list->next) |
---|
| 590 | for (opt = list->options; opt->name != NULL; ++opt) |
---|
| 591 | if (strcmp(name, opt->name) == 0) |
---|
| 592 | return opt; |
---|
| 593 | for (opt = general_options; opt->name != NULL; ++opt) |
---|
| 594 | if (strcmp(name, opt->name) == 0) |
---|
| 595 | return opt; |
---|
| 596 | for (opt = auth_options; opt->name != NULL; ++opt) |
---|
| 597 | if (strcmp(name, opt->name) == 0) |
---|
| 598 | return opt; |
---|
| 599 | for (i = 0; protocols[i] != NULL; ++i) |
---|
| 600 | if ((opt = protocols[i]->options) != NULL) |
---|
| 601 | for (; opt->name != NULL; ++opt) |
---|
| 602 | if (strcmp(name, opt->name) == 0) |
---|
| 603 | return opt; |
---|
| 604 | return NULL; |
---|
| 605 | } |
---|
| 606 | |
---|
| 607 | /* |
---|
| 608 | * process_option - process one new-style option. |
---|
[d0950ad] | 609 | */ |
---|
| 610 | static int |
---|
[2f1b930] | 611 | process_option(opt, argv) |
---|
| 612 | option_t *opt; |
---|
[d0950ad] | 613 | char **argv; |
---|
| 614 | { |
---|
[2f1b930] | 615 | u_int32_t v; |
---|
| 616 | int iv, a; |
---|
| 617 | char *sv; |
---|
[d08e825b] | 618 | int (*parser)(char **); |
---|
[2f1b930] | 619 | |
---|
| 620 | if ((opt->flags & OPT_PREPASS) == 0 && prepass) |
---|
| 621 | return 1; |
---|
[48cdb95a] | 622 | if ((opt->flags & OPT_INITONLY) && pppd_phase != PHASE_INITIALIZE) { |
---|
[2f1b930] | 623 | option_error("it's too late to use the %s option", opt->name); |
---|
| 624 | return 0; |
---|
| 625 | } |
---|
| 626 | if ((opt->flags & OPT_PRIV) && !privileged_option) { |
---|
| 627 | option_error("using the %s option requires root privilege", opt->name); |
---|
| 628 | return 0; |
---|
| 629 | } |
---|
| 630 | if ((opt->flags & OPT_ENABLE) && *(bool *)(opt->addr2) == 0) { |
---|
| 631 | option_error("%s option is disabled", opt->name); |
---|
| 632 | return 0; |
---|
| 633 | } |
---|
| 634 | if ((opt->flags & OPT_PRIVFIX) && !privileged_option) { |
---|
| 635 | struct option_info *ip = (struct option_info *) opt->addr2; |
---|
| 636 | if (ip && ip->priv) { |
---|
| 637 | option_error("%s option cannot be overridden", opt->name); |
---|
| 638 | return 0; |
---|
| 639 | } |
---|
| 640 | } |
---|
| 641 | |
---|
| 642 | switch (opt->type) { |
---|
| 643 | case o_bool: |
---|
| 644 | v = opt->flags & OPT_VALUE; |
---|
| 645 | *(bool *)(opt->addr) = v; |
---|
| 646 | if (opt->addr2 && (opt->flags & OPT_A2COPY)) |
---|
| 647 | *(bool *)(opt->addr2) = v; |
---|
| 648 | break; |
---|
| 649 | |
---|
| 650 | case o_int: |
---|
| 651 | iv = 0; |
---|
| 652 | if ((opt->flags & OPT_NOARG) == 0) { |
---|
| 653 | if (!int_option(*argv, &iv)) |
---|
| 654 | return 0; |
---|
| 655 | if ((((opt->flags & OPT_LLIMIT) && iv < opt->lower_limit) |
---|
| 656 | || ((opt->flags & OPT_ULIMIT) && iv > opt->upper_limit)) |
---|
| 657 | && !((opt->flags & OPT_ZEROOK && iv == 0))) { |
---|
| 658 | char *zok = (opt->flags & OPT_ZEROOK)? " zero or": ""; |
---|
| 659 | switch (opt->flags & OPT_LIMITS) { |
---|
| 660 | case OPT_LLIMIT: |
---|
| 661 | option_error("%s value must be%s >= %d", |
---|
| 662 | opt->name, zok, opt->lower_limit); |
---|
| 663 | break; |
---|
| 664 | case OPT_ULIMIT: |
---|
| 665 | option_error("%s value must be%s <= %d", |
---|
| 666 | opt->name, zok, opt->upper_limit); |
---|
| 667 | break; |
---|
| 668 | case OPT_LIMITS: |
---|
| 669 | option_error("%s value must be%s between %d and %d", |
---|
| 670 | opt->name, opt->lower_limit, opt->upper_limit); |
---|
| 671 | break; |
---|
| 672 | } |
---|
| 673 | return 0; |
---|
| 674 | } |
---|
| 675 | } |
---|
| 676 | a = opt->flags & OPT_VALUE; |
---|
| 677 | if (a >= 128) |
---|
| 678 | a -= 256; /* sign extend */ |
---|
| 679 | iv += a; |
---|
| 680 | if (opt->flags & OPT_INC) |
---|
| 681 | iv += *(int *)(opt->addr); |
---|
| 682 | if ((opt->flags & OPT_NOINCR) && !privileged_option) { |
---|
| 683 | int oldv = *(int *)(opt->addr); |
---|
| 684 | if ((opt->flags & OPT_ZEROINF) ? |
---|
| 685 | (oldv != 0 && (iv == 0 || iv > oldv)) : (iv > oldv)) { |
---|
| 686 | option_error("%s value cannot be increased", opt->name); |
---|
| 687 | return 0; |
---|
| 688 | } |
---|
| 689 | } |
---|
| 690 | *(int *)(opt->addr) = iv; |
---|
| 691 | if (opt->addr2 && (opt->flags & OPT_A2COPY)) |
---|
| 692 | *(int *)(opt->addr2) = iv; |
---|
| 693 | break; |
---|
| 694 | |
---|
| 695 | case o_uint32: |
---|
| 696 | if (opt->flags & OPT_NOARG) { |
---|
| 697 | v = opt->flags & OPT_VALUE; |
---|
| 698 | } else if (!number_option(*argv, &v, 16)) |
---|
| 699 | return 0; |
---|
| 700 | if (opt->flags & OPT_OR) |
---|
| 701 | v |= *(u_int32_t *)(opt->addr); |
---|
| 702 | *(u_int32_t *)(opt->addr) = v; |
---|
| 703 | if (opt->addr2 && (opt->flags & OPT_A2COPY)) |
---|
| 704 | *(u_int32_t *)(opt->addr2) = v; |
---|
| 705 | break; |
---|
| 706 | |
---|
| 707 | case o_string: |
---|
| 708 | if (opt->flags & OPT_STATIC) { |
---|
| 709 | strlcpy((char *)(opt->addr), *argv, opt->upper_limit); |
---|
| 710 | } else { |
---|
| 711 | sv = strdup(*argv); |
---|
| 712 | if (sv == NULL) |
---|
| 713 | novm("option argument"); |
---|
[0286b9f] | 714 | if ( *(char **)(opt->addr) != NULL ) { |
---|
| 715 | free((void *)*(char **)(opt->addr)); |
---|
| 716 | *(char **)(opt->addr) = NULL; |
---|
| 717 | } |
---|
[2f1b930] | 718 | *(char **)(opt->addr) = sv; |
---|
| 719 | } |
---|
| 720 | break; |
---|
| 721 | |
---|
| 722 | case o_special_noarg: |
---|
| 723 | case o_special: |
---|
[d08e825b] | 724 | parser = (int (*)(char **)) opt->addr; |
---|
[2f1b930] | 725 | if (!(*parser)(argv)) |
---|
| 726 | return 0; |
---|
| 727 | break; |
---|
| 728 | } |
---|
| 729 | |
---|
| 730 | if (opt->addr2) { |
---|
| 731 | if (opt->flags & OPT_A2INFO) { |
---|
| 732 | struct option_info *ip = (struct option_info *) opt->addr2; |
---|
| 733 | ip->priv = privileged_option; |
---|
| 734 | ip->source = option_source; |
---|
| 735 | } else if ((opt->flags & (OPT_A2COPY|OPT_ENABLE)) == 0) |
---|
| 736 | *(bool *)(opt->addr2) = 1; |
---|
| 737 | } |
---|
| 738 | |
---|
| 739 | return 1; |
---|
| 740 | } |
---|
| 741 | |
---|
| 742 | /* |
---|
| 743 | * n_arguments - tell how many arguments an option takes |
---|
| 744 | */ |
---|
| 745 | static int |
---|
| 746 | n_arguments(opt) |
---|
| 747 | option_t *opt; |
---|
| 748 | { |
---|
| 749 | return (opt->type == o_bool || opt->type == o_special_noarg |
---|
| 750 | || (opt->flags & OPT_NOARG))? 0: 1; |
---|
[d0950ad] | 751 | } |
---|
| 752 | |
---|
[2f1b930] | 753 | /* |
---|
| 754 | * add_options - add a list of options to the set we grok. |
---|
| 755 | */ |
---|
[d0950ad] | 756 | void |
---|
[2f1b930] | 757 | add_options(opt) |
---|
| 758 | option_t *opt; |
---|
| 759 | { |
---|
| 760 | struct option_list *list; |
---|
| 761 | |
---|
| 762 | list = malloc(sizeof(*list)); |
---|
| 763 | if (list == 0) |
---|
| 764 | novm("option list entry"); |
---|
| 765 | list->options = opt; |
---|
| 766 | list->next = extra_options; |
---|
| 767 | extra_options = list; |
---|
| 768 | } |
---|
| 769 | |
---|
| 770 | /* |
---|
| 771 | * usage - print out a message telling how to use the program. |
---|
| 772 | */ |
---|
| 773 | static void |
---|
| 774 | usage() |
---|
[d0950ad] | 775 | { |
---|
[48cdb95a] | 776 | if (pppd_phase == PHASE_INITIALIZE) |
---|
[2f1b930] | 777 | fprintf(stderr, usage_string, VERSION, PATCHLEVEL, IMPLEMENTATION, |
---|
[48cdb95a] | 778 | "rtems_pppd"); |
---|
[d0950ad] | 779 | } |
---|
[2f1b930] | 780 | |
---|
[d0950ad] | 781 | /* |
---|
[2f1b930] | 782 | * option_error - print a message about an error in an option. |
---|
| 783 | * The message is logged, and also sent to |
---|
[48cdb95a] | 784 | * stderr if pppd_phase == PHASE_INITIALIZE. |
---|
[d0950ad] | 785 | */ |
---|
[2f1b930] | 786 | void |
---|
| 787 | option_error __V((char *fmt, ...)) |
---|
[d0950ad] | 788 | { |
---|
[2f1b930] | 789 | va_list args; |
---|
| 790 | char buf[256]; |
---|
[d0950ad] | 791 | |
---|
[2f1b930] | 792 | #if defined(__STDC__) |
---|
| 793 | va_start(args, fmt); |
---|
| 794 | #else |
---|
| 795 | char *fmt; |
---|
| 796 | va_start(args); |
---|
| 797 | fmt = va_arg(args, char *); |
---|
| 798 | #endif |
---|
| 799 | if (prepass) { |
---|
| 800 | va_end(args); |
---|
| 801 | return; |
---|
| 802 | } |
---|
| 803 | vslprintf(buf, sizeof(buf), fmt, args); |
---|
| 804 | va_end(args); |
---|
| 805 | |
---|
| 806 | fprintf(stderr, "pppd: %s\n", buf); |
---|
[d0950ad] | 807 | } |
---|
[2f1b930] | 808 | |
---|
[d0950ad] | 809 | /* |
---|
| 810 | * Read a word from a file. |
---|
| 811 | * Words are delimited by white-space or by quotes (" or '). |
---|
| 812 | * Quotes, white-space and \ may be escaped with \. |
---|
| 813 | * \<newline> is ignored. |
---|
| 814 | */ |
---|
[2f1b930] | 815 | int |
---|
| 816 | getword(f, word, newlinep, filename) |
---|
| 817 | FILE *f; |
---|
| 818 | char *word; |
---|
| 819 | int *newlinep; |
---|
| 820 | char *filename; |
---|
| 821 | { |
---|
| 822 | int c, len, escape; |
---|
| 823 | int quoted, comment; |
---|
| 824 | int value, digit, got, n; |
---|
| 825 | |
---|
| 826 | #define isoctal(c) ((c) >= '0' && (c) < '8') |
---|
| 827 | |
---|
| 828 | *newlinep = 0; |
---|
| 829 | len = 0; |
---|
| 830 | escape = 0; |
---|
| 831 | comment = 0; |
---|
| 832 | |
---|
| 833 | /* |
---|
| 834 | * First skip white-space and comments. |
---|
| 835 | */ |
---|
| 836 | for (;;) { |
---|
| 837 | c = getc(f); |
---|
| 838 | if (c == EOF) |
---|
| 839 | break; |
---|
| 840 | |
---|
| 841 | /* |
---|
| 842 | * A newline means the end of a comment; backslash-newline |
---|
| 843 | * is ignored. Note that we cannot have escape && comment. |
---|
| 844 | */ |
---|
| 845 | if (c == '\n') { |
---|
| 846 | if (!escape) { |
---|
| 847 | *newlinep = 1; |
---|
| 848 | comment = 0; |
---|
| 849 | } else |
---|
| 850 | escape = 0; |
---|
| 851 | continue; |
---|
| 852 | } |
---|
| 853 | |
---|
| 854 | /* |
---|
| 855 | * Ignore characters other than newline in a comment. |
---|
| 856 | */ |
---|
| 857 | if (comment) |
---|
| 858 | continue; |
---|
| 859 | |
---|
| 860 | /* |
---|
| 861 | * If this character is escaped, we have a word start. |
---|
| 862 | */ |
---|
| 863 | if (escape) |
---|
| 864 | break; |
---|
| 865 | |
---|
| 866 | /* |
---|
| 867 | * If this is the escape character, look at the next character. |
---|
| 868 | */ |
---|
| 869 | if (c == '\\') { |
---|
| 870 | escape = 1; |
---|
| 871 | continue; |
---|
| 872 | } |
---|
| 873 | |
---|
| 874 | /* |
---|
| 875 | * If this is the start of a comment, ignore the rest of the line. |
---|
| 876 | */ |
---|
| 877 | if (c == '#') { |
---|
| 878 | comment = 1; |
---|
| 879 | continue; |
---|
| 880 | } |
---|
| 881 | |
---|
| 882 | /* |
---|
| 883 | * A non-whitespace character is the start of a word. |
---|
| 884 | */ |
---|
| 885 | if (!isspace(c)) |
---|
| 886 | break; |
---|
| 887 | } |
---|
| 888 | |
---|
| 889 | /* |
---|
| 890 | * Save the delimiter for quoted strings. |
---|
| 891 | */ |
---|
| 892 | if (!escape && (c == '"' || c == '\'')) { |
---|
| 893 | quoted = c; |
---|
| 894 | c = getc(f); |
---|
| 895 | } else |
---|
| 896 | quoted = 0; |
---|
| 897 | |
---|
| 898 | /* |
---|
| 899 | * Process characters until the end of the word. |
---|
| 900 | */ |
---|
| 901 | while (c != EOF) { |
---|
| 902 | if (escape) { |
---|
| 903 | /* |
---|
| 904 | * This character is escaped: backslash-newline is ignored, |
---|
| 905 | * various other characters indicate particular values |
---|
| 906 | * as for C backslash-escapes. |
---|
| 907 | */ |
---|
| 908 | escape = 0; |
---|
| 909 | if (c == '\n') { |
---|
| 910 | c = getc(f); |
---|
| 911 | continue; |
---|
| 912 | } |
---|
| 913 | |
---|
| 914 | got = 0; |
---|
| 915 | switch (c) { |
---|
| 916 | case 'a': |
---|
| 917 | value = '\a'; |
---|
| 918 | break; |
---|
| 919 | case 'b': |
---|
| 920 | value = '\b'; |
---|
| 921 | break; |
---|
| 922 | case 'f': |
---|
| 923 | value = '\f'; |
---|
| 924 | break; |
---|
| 925 | case 'n': |
---|
| 926 | value = '\n'; |
---|
| 927 | break; |
---|
| 928 | case 'r': |
---|
| 929 | value = '\r'; |
---|
| 930 | break; |
---|
| 931 | case 's': |
---|
| 932 | value = ' '; |
---|
| 933 | break; |
---|
| 934 | case 't': |
---|
| 935 | value = '\t'; |
---|
| 936 | break; |
---|
| 937 | |
---|
| 938 | default: |
---|
| 939 | if (isoctal(c)) { |
---|
| 940 | /* |
---|
| 941 | * \ddd octal sequence |
---|
| 942 | */ |
---|
| 943 | value = 0; |
---|
| 944 | for (n = 0; n < 3 && isoctal(c); ++n) { |
---|
| 945 | value = (value << 3) + (c & 07); |
---|
| 946 | c = getc(f); |
---|
| 947 | } |
---|
| 948 | got = 1; |
---|
| 949 | break; |
---|
| 950 | } |
---|
| 951 | |
---|
| 952 | if (c == 'x') { |
---|
| 953 | /* |
---|
| 954 | * \x<hex_string> sequence |
---|
| 955 | */ |
---|
| 956 | value = 0; |
---|
| 957 | c = getc(f); |
---|
| 958 | for (n = 0; n < 2 && isxdigit(c); ++n) { |
---|
| 959 | digit = toupper(c) - '0'; |
---|
| 960 | if (digit > 10) |
---|
| 961 | digit += '0' + 10 - 'A'; |
---|
| 962 | value = (value << 4) + digit; |
---|
| 963 | c = getc (f); |
---|
| 964 | } |
---|
| 965 | got = 1; |
---|
| 966 | break; |
---|
| 967 | } |
---|
| 968 | |
---|
| 969 | /* |
---|
| 970 | * Otherwise the character stands for itself. |
---|
| 971 | */ |
---|
| 972 | value = c; |
---|
| 973 | break; |
---|
| 974 | } |
---|
| 975 | |
---|
| 976 | /* |
---|
| 977 | * Store the resulting character for the escape sequence. |
---|
| 978 | */ |
---|
| 979 | if (len < MAXWORDLEN-1) |
---|
| 980 | word[len] = value; |
---|
| 981 | ++len; |
---|
| 982 | |
---|
| 983 | if (!got) |
---|
| 984 | c = getc(f); |
---|
| 985 | continue; |
---|
| 986 | |
---|
| 987 | } |
---|
| 988 | |
---|
| 989 | /* |
---|
| 990 | * Not escaped: see if we've reached the end of the word. |
---|
| 991 | */ |
---|
| 992 | if (quoted) { |
---|
| 993 | if (c == quoted) |
---|
| 994 | break; |
---|
| 995 | } else { |
---|
| 996 | if (isspace(c) || c == '#') { |
---|
| 997 | ungetc (c, f); |
---|
| 998 | break; |
---|
| 999 | } |
---|
| 1000 | } |
---|
| 1001 | |
---|
| 1002 | /* |
---|
| 1003 | * Backslash starts an escape sequence. |
---|
| 1004 | */ |
---|
| 1005 | if (c == '\\') { |
---|
| 1006 | escape = 1; |
---|
| 1007 | c = getc(f); |
---|
| 1008 | continue; |
---|
| 1009 | } |
---|
| 1010 | |
---|
| 1011 | /* |
---|
| 1012 | * An ordinary character: store it in the word and get another. |
---|
| 1013 | */ |
---|
| 1014 | if (len < MAXWORDLEN-1) |
---|
| 1015 | word[len] = c; |
---|
| 1016 | ++len; |
---|
| 1017 | |
---|
| 1018 | c = getc(f); |
---|
| 1019 | } |
---|
| 1020 | |
---|
| 1021 | /* |
---|
| 1022 | * End of the word: check for errors. |
---|
| 1023 | */ |
---|
| 1024 | if (c == EOF) { |
---|
| 1025 | if (ferror(f)) { |
---|
| 1026 | if (errno == 0) |
---|
| 1027 | errno = EIO; |
---|
| 1028 | option_error("Error reading %s: %m", filename); |
---|
| 1029 | die(1); |
---|
| 1030 | } |
---|
| 1031 | /* |
---|
| 1032 | * If len is zero, then we didn't find a word before the |
---|
| 1033 | * end of the file. |
---|
| 1034 | */ |
---|
| 1035 | if (len == 0) |
---|
| 1036 | return 0; |
---|
| 1037 | } |
---|
| 1038 | |
---|
| 1039 | /* |
---|
| 1040 | * Warn if the word was too long, and append a terminating null. |
---|
| 1041 | */ |
---|
| 1042 | if (len >= MAXWORDLEN) { |
---|
| 1043 | option_error("warning: word in file %s too long (%.20s...)", |
---|
| 1044 | filename, word); |
---|
| 1045 | len = MAXWORDLEN - 1; |
---|
| 1046 | } |
---|
| 1047 | word[len] = 0; |
---|
| 1048 | |
---|
| 1049 | return 1; |
---|
| 1050 | |
---|
| 1051 | #undef isoctal |
---|
| 1052 | |
---|
| 1053 | } |
---|
| 1054 | |
---|
| 1055 | /* |
---|
| 1056 | * number_option - parse an unsigned numeric parameter for an option. |
---|
| 1057 | */ |
---|
| 1058 | static int |
---|
| 1059 | number_option(str, valp, base) |
---|
| 1060 | char *str; |
---|
| 1061 | u_int32_t *valp; |
---|
| 1062 | int base; |
---|
| 1063 | { |
---|
| 1064 | char *ptr; |
---|
| 1065 | |
---|
| 1066 | *valp = strtoul(str, &ptr, base); |
---|
| 1067 | if (ptr == str) { |
---|
| 1068 | option_error("invalid numeric parameter '%s' for %s option", |
---|
| 1069 | str, current_option); |
---|
| 1070 | return 0; |
---|
| 1071 | } |
---|
| 1072 | return 1; |
---|
| 1073 | } |
---|
| 1074 | |
---|
| 1075 | |
---|
| 1076 | /* |
---|
| 1077 | * int_option - like number_option, but valp is int *, |
---|
| 1078 | * the base is assumed to be 0, and *valp is not changed |
---|
| 1079 | * if there is an error. |
---|
| 1080 | */ |
---|
| 1081 | int |
---|
| 1082 | int_option(str, valp) |
---|
| 1083 | char *str; |
---|
| 1084 | int *valp; |
---|
| 1085 | { |
---|
| 1086 | u_int32_t v; |
---|
| 1087 | |
---|
| 1088 | if (!number_option(str, &v, 0)) |
---|
| 1089 | return 0; |
---|
| 1090 | *valp = (int) v; |
---|
| 1091 | return 1; |
---|
| 1092 | } |
---|
| 1093 | |
---|
[d0950ad] | 1094 | |
---|
[2f1b930] | 1095 | /* |
---|
[d0950ad] | 1096 | * The following procedures parse options. |
---|
| 1097 | */ |
---|
| 1098 | |
---|
| 1099 | /* |
---|
| 1100 | * readfile - take commands from a file. |
---|
| 1101 | */ |
---|
[2f1b930] | 1102 | static int |
---|
| 1103 | readfile(argv) |
---|
| 1104 | char **argv; |
---|
| 1105 | { |
---|
| 1106 | return options_from_file(*argv, 1, 1, privileged_option); |
---|
| 1107 | } |
---|
| 1108 | |
---|
[d0950ad] | 1109 | /* |
---|
| 1110 | * callfile - take commands from /etc/ppp/peers/<name>. |
---|
| 1111 | * Name may not contain /../, start with / or ../, or end in /.. |
---|
| 1112 | */ |
---|
[2f1b930] | 1113 | static int |
---|
| 1114 | callfile(argv) |
---|
| 1115 | char **argv; |
---|
| 1116 | { |
---|
| 1117 | char *fname, *arg, *p; |
---|
| 1118 | int l, ok; |
---|
| 1119 | |
---|
| 1120 | arg = *argv; |
---|
| 1121 | ok = 1; |
---|
| 1122 | if (arg[0] == '/' || arg[0] == 0) |
---|
| 1123 | ok = 0; |
---|
| 1124 | else { |
---|
| 1125 | for (p = arg; *p != 0; ) { |
---|
| 1126 | if (p[0] == '.' && p[1] == '.' && (p[2] == '/' || p[2] == 0)) { |
---|
| 1127 | ok = 0; |
---|
| 1128 | break; |
---|
| 1129 | } |
---|
| 1130 | while (*p != '/' && *p != 0) |
---|
| 1131 | ++p; |
---|
| 1132 | if (*p == '/') |
---|
| 1133 | ++p; |
---|
| 1134 | } |
---|
| 1135 | } |
---|
| 1136 | if (!ok) { |
---|
| 1137 | option_error("call option value may not contain .. or start with /"); |
---|
| 1138 | return 0; |
---|
| 1139 | } |
---|
| 1140 | |
---|
| 1141 | l = strlen(arg) + strlen(_PATH_PEERFILES) + 1; |
---|
| 1142 | if ((fname = (char *) malloc(l)) == NULL) |
---|
| 1143 | novm("call file name"); |
---|
| 1144 | slprintf(fname, l, "%s%s", _PATH_PEERFILES, arg); |
---|
| 1145 | |
---|
| 1146 | ok = options_from_file(fname, 1, 1, 1); |
---|
| 1147 | |
---|
| 1148 | free(fname); |
---|
| 1149 | return ok; |
---|
| 1150 | } |
---|
| 1151 | |
---|
| 1152 | #ifdef PPP_FILTER |
---|
| 1153 | /* |
---|
| 1154 | * setpdebug - Set libpcap debugging level. |
---|
| 1155 | */ |
---|
| 1156 | static int |
---|
| 1157 | setpdebug(argv) |
---|
| 1158 | char **argv; |
---|
| 1159 | { |
---|
| 1160 | return int_option(*argv, &dflag); |
---|
| 1161 | } |
---|
| 1162 | |
---|
| 1163 | /* |
---|
| 1164 | * setpassfilter - Set the pass filter for packets |
---|
| 1165 | */ |
---|
| 1166 | static int |
---|
| 1167 | setpassfilter(argv) |
---|
| 1168 | char **argv; |
---|
| 1169 | { |
---|
| 1170 | pc.linktype = DLT_PPP; |
---|
| 1171 | pc.snapshot = PPP_HDRLEN; |
---|
| 1172 | |
---|
| 1173 | if (pcap_compile(&pc, &pass_filter, *argv, 1, netmask) == 0) |
---|
| 1174 | return 1; |
---|
| 1175 | option_error("error in pass-filter expression: %s\n", pcap_geterr(&pc)); |
---|
| 1176 | return 0; |
---|
| 1177 | } |
---|
| 1178 | |
---|
| 1179 | /* |
---|
| 1180 | * setactivefilter - Set the active filter for packets |
---|
[d0950ad] | 1181 | */ |
---|
[2f1b930] | 1182 | static int |
---|
| 1183 | setactivefilter(argv) |
---|
| 1184 | char **argv; |
---|
| 1185 | { |
---|
| 1186 | pc.linktype = DLT_PPP; |
---|
| 1187 | pc.snapshot = PPP_HDRLEN; |
---|
[d0950ad] | 1188 | |
---|
[2f1b930] | 1189 | if (pcap_compile(&pc, &active_filter, *argv, 1, netmask) == 0) |
---|
| 1190 | return 1; |
---|
| 1191 | option_error("error in active-filter expression: %s\n", pcap_geterr(&pc)); |
---|
| 1192 | return 0; |
---|
| 1193 | } |
---|
| 1194 | #endif |
---|
[d0950ad] | 1195 | |
---|
| 1196 | /* |
---|
| 1197 | * noopt - Disable all options. |
---|
| 1198 | */ |
---|
| 1199 | static int |
---|
| 1200 | noopt(argv) |
---|
| 1201 | char **argv; |
---|
| 1202 | { |
---|
| 1203 | BZERO((char *) &lcp_wantoptions[0], sizeof (struct lcp_options)); |
---|
| 1204 | BZERO((char *) &lcp_allowoptions[0], sizeof (struct lcp_options)); |
---|
| 1205 | BZERO((char *) &ipcp_wantoptions[0], sizeof (struct ipcp_options)); |
---|
| 1206 | BZERO((char *) &ipcp_allowoptions[0], sizeof (struct ipcp_options)); |
---|
| 1207 | |
---|
[2f1b930] | 1208 | return (1); |
---|
| 1209 | } |
---|
| 1210 | |
---|
| 1211 | /* |
---|
| 1212 | * setdomain - Set domain name to append to hostname |
---|
| 1213 | */ |
---|
| 1214 | static int |
---|
| 1215 | setdomain(argv) |
---|
| 1216 | char **argv; |
---|
| 1217 | { |
---|
| 1218 | if (!privileged_option) { |
---|
| 1219 | option_error("using the domain option requires root privilege"); |
---|
| 1220 | return 0; |
---|
| 1221 | } |
---|
| 1222 | gethostname(hostname, MAXNAMELEN); |
---|
| 1223 | if (**argv != 0) { |
---|
| 1224 | if (**argv != '.') |
---|
| 1225 | strncat(hostname, ".", MAXNAMELEN - strlen(hostname)); |
---|
| 1226 | strncat(hostname, *argv, MAXNAMELEN - strlen(hostname)); |
---|
| 1227 | } |
---|
| 1228 | hostname[MAXNAMELEN-1] = 0; |
---|
| 1229 | return (1); |
---|
| 1230 | } |
---|
| 1231 | |
---|
| 1232 | |
---|
| 1233 | /* |
---|
| 1234 | * setspeed - Set the speed. |
---|
| 1235 | */ |
---|
| 1236 | static int |
---|
| 1237 | setspeed(arg) |
---|
| 1238 | char *arg; |
---|
| 1239 | { |
---|
| 1240 | int spd; |
---|
[300c914c] | 1241 | uint32_t ret = (int)1; |
---|
[2f1b930] | 1242 | speed_t spdValue = (speed_t)0; |
---|
| 1243 | char *ptr; |
---|
| 1244 | |
---|
| 1245 | if ( !prepass ) { |
---|
| 1246 | spd = strtol(arg, &ptr, 0); |
---|
| 1247 | if (ptr == arg || *ptr != 0 || spd == 0) { |
---|
| 1248 | ret = (int)0; |
---|
| 1249 | } |
---|
| 1250 | else { |
---|
| 1251 | switch ( spd ) { |
---|
[300c914c] | 1252 | case 2400L: |
---|
[2f1b930] | 1253 | spdValue = B2400; |
---|
| 1254 | break; |
---|
[300c914c] | 1255 | case 4800L: |
---|
[2f1b930] | 1256 | spdValue = B4800; |
---|
| 1257 | break; |
---|
[300c914c] | 1258 | case 9600L: |
---|
[2f1b930] | 1259 | spdValue = B9600; |
---|
| 1260 | break; |
---|
[300c914c] | 1261 | case 19200L: |
---|
[2f1b930] | 1262 | spdValue = B19200; |
---|
| 1263 | break; |
---|
[300c914c] | 1264 | case 38400L: |
---|
[2f1b930] | 1265 | spdValue = B38400; |
---|
| 1266 | break; |
---|
[300c914c] | 1267 | case 57600L: |
---|
[2f1b930] | 1268 | spdValue = B57600; |
---|
| 1269 | break; |
---|
[300c914c] | 1270 | case 115200L: |
---|
[2f1b930] | 1271 | spdValue = B115200; |
---|
| 1272 | break; |
---|
| 1273 | default: |
---|
| 1274 | ret = (int)0; |
---|
| 1275 | break; |
---|
| 1276 | } |
---|
| 1277 | |
---|
| 1278 | if ( spdValue ) { |
---|
| 1279 | inspeed = spdValue; |
---|
| 1280 | } |
---|
| 1281 | } |
---|
| 1282 | } |
---|
| 1283 | |
---|
| 1284 | return ( ret ); |
---|
| 1285 | } |
---|
| 1286 | |
---|
| 1287 | |
---|
| 1288 | /* |
---|
| 1289 | * setdevname - Set the device name. |
---|
| 1290 | */ |
---|
| 1291 | static int |
---|
| 1292 | setdevname(cp) |
---|
| 1293 | char *cp; |
---|
| 1294 | { |
---|
| 1295 | struct stat statbuf; |
---|
| 1296 | char dev[MAXPATHLEN]; |
---|
| 1297 | |
---|
| 1298 | if (*cp == 0) |
---|
| 1299 | return 0; |
---|
| 1300 | |
---|
| 1301 | if (strncmp("/dev/", cp, 5) != 0) { |
---|
| 1302 | strlcpy(dev, "/dev/", sizeof(dev)); |
---|
| 1303 | strlcat(dev, cp, sizeof(dev)); |
---|
| 1304 | cp = dev; |
---|
| 1305 | } |
---|
| 1306 | |
---|
| 1307 | /* |
---|
| 1308 | * Check if there is a character device by this name. |
---|
| 1309 | */ |
---|
| 1310 | if (stat(cp, &statbuf) < 0) { |
---|
| 1311 | if (errno == ENOENT) |
---|
| 1312 | return 0; |
---|
| 1313 | option_error("Couldn't stat %s: %m", cp); |
---|
| 1314 | return -1; |
---|
| 1315 | } |
---|
| 1316 | if (!S_ISCHR(statbuf.st_mode)) { |
---|
| 1317 | option_error("%s is not a character device", cp); |
---|
| 1318 | return -1; |
---|
| 1319 | } |
---|
| 1320 | |
---|
[48cdb95a] | 1321 | if (pppd_phase != PHASE_INITIALIZE) { |
---|
[2f1b930] | 1322 | option_error("device name cannot be changed after initialization"); |
---|
| 1323 | return -1; |
---|
| 1324 | } else if (devnam_fixed) { |
---|
| 1325 | option_error("per-tty options file may not specify device name"); |
---|
| 1326 | return -1; |
---|
| 1327 | } |
---|
| 1328 | |
---|
| 1329 | if (devnam_info.priv && !privileged_option) { |
---|
| 1330 | option_error("device name cannot be overridden"); |
---|
| 1331 | return -1; |
---|
| 1332 | } |
---|
| 1333 | |
---|
| 1334 | strlcpy(devnam, cp, sizeof(devnam)); |
---|
| 1335 | devstat = statbuf; |
---|
| 1336 | default_device = 0; |
---|
| 1337 | devnam_info.priv = privileged_option; |
---|
| 1338 | devnam_info.source = option_source; |
---|
| 1339 | |
---|
| 1340 | return 1; |
---|
| 1341 | } |
---|
| 1342 | |
---|
| 1343 | |
---|
| 1344 | /* |
---|
| 1345 | * setipaddr - Set the IP address |
---|
| 1346 | */ |
---|
| 1347 | static int |
---|
| 1348 | setipaddr(arg) |
---|
| 1349 | char *arg; |
---|
| 1350 | { |
---|
| 1351 | struct hostent *hp; |
---|
| 1352 | char *colon; |
---|
| 1353 | u_int32_t local, remote; |
---|
| 1354 | ipcp_options *wo = &ipcp_wantoptions[0]; |
---|
| 1355 | |
---|
| 1356 | /* |
---|
| 1357 | * IP address pair separated by ":". |
---|
| 1358 | */ |
---|
| 1359 | if ((colon = strchr(arg, ':')) == NULL) |
---|
| 1360 | return 0; |
---|
| 1361 | if (prepass) |
---|
| 1362 | return 1; |
---|
| 1363 | |
---|
| 1364 | /* |
---|
| 1365 | * If colon first character, then no local addr. |
---|
| 1366 | */ |
---|
| 1367 | if (colon != arg) { |
---|
| 1368 | *colon = '\0'; |
---|
| 1369 | if ((local = inet_addr(arg)) == (u_int32_t) -1) { |
---|
| 1370 | if ((hp = gethostbyname(arg)) == NULL) { |
---|
| 1371 | option_error("unknown host: %s", arg); |
---|
| 1372 | return -1; |
---|
| 1373 | } else { |
---|
| 1374 | local = *(u_int32_t *)hp->h_addr; |
---|
| 1375 | } |
---|
| 1376 | } |
---|
| 1377 | if (bad_ip_adrs(local)) { |
---|
| 1378 | option_error("bad local IP address %s", ip_ntoa(local)); |
---|
| 1379 | return -1; |
---|
| 1380 | } |
---|
| 1381 | if (local != 0) |
---|
| 1382 | wo->ouraddr = local; |
---|
| 1383 | *colon = ':'; |
---|
| 1384 | } |
---|
| 1385 | |
---|
| 1386 | /* |
---|
| 1387 | * If colon last character, then no remote addr. |
---|
| 1388 | */ |
---|
| 1389 | if (*++colon != '\0') { |
---|
| 1390 | if ((remote = inet_addr(colon)) == (u_int32_t) -1) { |
---|
| 1391 | if ((hp = gethostbyname(colon)) == NULL) { |
---|
| 1392 | option_error("unknown host: %s", colon); |
---|
| 1393 | return -1; |
---|
| 1394 | } else { |
---|
| 1395 | remote = *(u_int32_t *)hp->h_addr; |
---|
| 1396 | if (remote_name[0] == 0) |
---|
| 1397 | strlcpy(remote_name, colon, sizeof(remote_name)); |
---|
| 1398 | } |
---|
| 1399 | } |
---|
| 1400 | if (bad_ip_adrs(remote)) { |
---|
| 1401 | option_error("bad remote IP address %s", ip_ntoa(remote)); |
---|
| 1402 | return -1; |
---|
| 1403 | } |
---|
| 1404 | if (remote != 0) |
---|
| 1405 | wo->hisaddr = remote; |
---|
| 1406 | } |
---|
| 1407 | |
---|
| 1408 | return 1; |
---|
| 1409 | } |
---|
| 1410 | |
---|
| 1411 | |
---|
| 1412 | /* |
---|
| 1413 | * setnetmask - set the netmask to be used on the interface. |
---|
| 1414 | */ |
---|
| 1415 | static int |
---|
| 1416 | setnetmask(argv) |
---|
| 1417 | char **argv; |
---|
| 1418 | { |
---|
| 1419 | u_int32_t mask, b; |
---|
| 1420 | int n, ok; |
---|
| 1421 | char *p, *endp; |
---|
| 1422 | |
---|
| 1423 | /* |
---|
| 1424 | * Unfortunately, if we use inet_addr, we can't tell whether |
---|
| 1425 | * a result of all 1s is an error or a valid 255.255.255.255. |
---|
| 1426 | */ |
---|
| 1427 | p = *argv; |
---|
| 1428 | ok = 0; |
---|
| 1429 | mask = 0; |
---|
| 1430 | for (n = 3;; --n) { |
---|
| 1431 | b = strtoul(p, &endp, 0); |
---|
| 1432 | if (endp == p) |
---|
| 1433 | break; |
---|
| 1434 | if (b > 255) { |
---|
| 1435 | if (n == 3) { |
---|
| 1436 | /* accept e.g. 0xffffff00 */ |
---|
| 1437 | p = endp; |
---|
| 1438 | mask = b; |
---|
| 1439 | } |
---|
| 1440 | break; |
---|
| 1441 | } |
---|
| 1442 | mask |= b << (n * 8); |
---|
| 1443 | p = endp; |
---|
| 1444 | if (*p != '.' || n == 0) |
---|
| 1445 | break; |
---|
| 1446 | ++p; |
---|
| 1447 | } |
---|
| 1448 | |
---|
| 1449 | mask = htonl(mask); |
---|
| 1450 | |
---|
| 1451 | if (*p != 0 || (netmask & ~mask) != 0) { |
---|
| 1452 | option_error("invalid netmask value '%s'", *argv); |
---|
| 1453 | return 0; |
---|
| 1454 | } |
---|
| 1455 | |
---|
| 1456 | netmask = mask; |
---|
| 1457 | return (1); |
---|
| 1458 | } |
---|
| 1459 | |
---|
| 1460 | static int |
---|
| 1461 | setxonxoff(argv) |
---|
| 1462 | char **argv; |
---|
| 1463 | { |
---|
| 1464 | lcp_wantoptions[0].asyncmap |= 0x000A0000; /* escape ^S and ^Q */ |
---|
| 1465 | lcp_wantoptions[0].neg_asyncmap = 1; |
---|
[d0950ad] | 1466 | |
---|
[2f1b930] | 1467 | crtscts = -2; |
---|
[d0950ad] | 1468 | return (1); |
---|
| 1469 | } |
---|
[2f1b930] | 1470 | |
---|
| 1471 | static int |
---|
| 1472 | setlogfile(argv) |
---|
| 1473 | char **argv; |
---|
| 1474 | { |
---|
| 1475 | int fd, err; |
---|
| 1476 | |
---|
| 1477 | fd = open(*argv, O_WRONLY | O_APPEND | O_CREAT | O_EXCL, 0644); |
---|
| 1478 | if (fd < 0 && errno == EEXIST) |
---|
| 1479 | fd = open(*argv, O_WRONLY | O_APPEND); |
---|
| 1480 | err = errno; |
---|
| 1481 | if (fd < 0) { |
---|
| 1482 | errno = err; |
---|
| 1483 | option_error("Can't open log file %s: %m", *argv); |
---|
| 1484 | return 0; |
---|
| 1485 | } |
---|
| 1486 | if (log_to_file && log_to_fd >= 0) |
---|
| 1487 | close(log_to_fd); |
---|
| 1488 | log_to_fd = fd; |
---|
| 1489 | log_to_file = 1; |
---|
| 1490 | return 1; |
---|
| 1491 | } |
---|
| 1492 | |
---|
| 1493 | #ifdef PLUGIN |
---|
| 1494 | static int |
---|
| 1495 | loadplugin(argv) |
---|
| 1496 | char **argv; |
---|
| 1497 | { |
---|
| 1498 | char *arg = *argv; |
---|
| 1499 | void *handle; |
---|
| 1500 | const char *err; |
---|
[d08e825b] | 1501 | void (*init)(void); |
---|
[2f1b930] | 1502 | |
---|
| 1503 | handle = dlopen(arg, RTLD_GLOBAL | RTLD_NOW); |
---|
| 1504 | if (handle == 0) { |
---|
| 1505 | err = dlerror(); |
---|
| 1506 | if (err != 0) |
---|
| 1507 | option_error("%s", err); |
---|
| 1508 | option_error("Couldn't load plugin %s", arg); |
---|
| 1509 | return 0; |
---|
| 1510 | } |
---|
| 1511 | init = dlsym(handle, "plugin_init"); |
---|
| 1512 | if (init == 0) { |
---|
| 1513 | option_error("%s has no initialization entry point", arg); |
---|
| 1514 | dlclose(handle); |
---|
| 1515 | return 0; |
---|
| 1516 | } |
---|
| 1517 | info("Plugin %s loaded.", arg); |
---|
| 1518 | (*init)(); |
---|
| 1519 | return 1; |
---|
| 1520 | } |
---|
| 1521 | #endif /* PLUGIN */ |
---|