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/*
* options.c - Option parsing code.
*
* Copyright (c) 1994, 1995, 1996 Eric Schenk.
* All rights reserved. Please see the file LICENSE which should be
* distributed with this software for terms of use.
*/
#include "diald.h"
#define MAXLINELEN 1024
#define MAXARGS 512
/* Configuration variables */
char device[10]; /* The Device tu use for MODE_DEV */
char device_node[9];
int device_iface ;
char **devices = 0;
int device_count = 0;
int inspeed = DEFAULT_SPEED;
int window = 0;
int mtu = DEFAULT_MTU;
int mru = DEFAULT_MTU;
char *connector = 0;
char *disconnector = 0;
char *local_ip = 0;
unsigned long local_addr = 0;
char *orig_local_ip = 0;
char *netmask = 0;
char *remote_ip = 0;
char *orig_remote_ip = 0;
char *addroute = 0;
char *delroute = 0;
char *ip_up = 0;
char *ip_down = 0;
char *acctlog = 0;
char *pidlog = "diald.pid";
char *fifoname = 0;
char *lock_prefix = LOCK_PREFIX;
int pidstring = PIDSTRING;
char *run_prefix = RUN_PREFIX;
char *path_route = PATH_ROUTE;
char *path_ifconfig = PATH_IFCONFIG;
char *path_bootpc = PATH_BOOTPC;
char *path_pppd = PATH_PPPD;
int buffer_packets = BUFFER_PACKETS;
int buffer_size = BUFFER_SIZE;
int buffer_fifo_dispose = BUFFER_FIFO_DISPOSE;
int buffer_timeout = BUFFER_TIMEOUT;
FILE *acctfp = 0;
int mode = MODE_SLIP;
int debug = 0;
int modem = 0;
int crtscts = 0;
int daemon_flag = 1;
int slip_encap = 0;
int lock_dev = 0;
int default_route = 0;
int dynamic_addrs = 0;
int strict_forwarding = 0;
int dynamic_mode = DMODE_REMOTE_LOCAL;
int rotate_devices = 0;
int two_way = 0;
int give_way = 0;
int do_reroute = UNSAFE_ROUTING;
int proxyarp = 0;
int route_wait = 0;
int connect_timeout = 60;
int disconnect_timeout = 60;
int redial_timeout = DEFAULT_DIAL_DELAY;
int nodev_retry_timeout = 1;
int stop_dial_timeout = 60;
int kill_timeout = 60;
int start_pppd_timeout = 60;
int stop_pppd_timeout = 60;
int first_packet_timeout = DEFAULT_FIRST_PACKET_TIMEOUT;
int retry_count = 0;
int died_retry_count = 1;
int redial_backoff_start = -1;
int redial_backoff_limit = 600;
int dial_fail_limit = 0;
#ifdef SIOCSKEEPALIVE
int keepalive = 0;
#endif
#ifdef SIOCSOUTFILL
int outfill = 0;
#endif
struct {
char *str;
char *uargs;
char args;
void *var;
void (*parser)();
} commands[] = {
{"-f","<file>",1,0,read_config_file},
{"-file","<file>",1,0,read_config_file},
{"include","<file>",1,0,read_config_file},
/* Mode options */
{"-m","[ppp|slip|cslip|slip6|cslip6|aslip|dev]",1,0,set_mode},
{"mode","[ppp|slip|cslip|slip6|cslip6|aslip|dev]",1,0,set_mode},
/* Debugging options */
{"debug","<debugmask>",1,&debug,set_int},
{"-daemon","",0,&daemon_flag,clear_flag},
/* general options */
{"accounting-log","<f>",1,&acctlog,set_str},
{"pidfile","<f>",1,&pidlog,set_str},
{"fifo","<f>",1,&fifoname,set_str},
/* Networking addressing and control options */
{"window","<n>",1,&window,set_int},
{"mtu","<m>",1,&mtu,set_int},
{"mru","<m>",1,&mru,set_int},
{"local","<ip-address>",1,&local_ip,set_str},
{"remote","<ip-address>",1,&remote_ip,set_str},
{"netmask","<ip-address>",1,&netmask,set_str},
{"dynamic","",0,&dynamic_addrs,set_flag},
{"strict-forwarding","",0,&strict_forwarding,set_flag},
{"dslip-mode","<mode>",1,0,set_dslip_mode},
{"defaultroute","",0,&default_route,set_flag},
{"addroute","<script>",1,&addroute,set_str},
{"delroute","<script>",1,&delroute,set_str},
{"proxyarp","",0,&proxyarp,set_flag},
{"ip-up","<script>",1,&ip_up,set_str},
{"ip-down","<script>",1,&ip_down,set_str},
{"reroute","",0,&do_reroute,set_flag},
{"-reroute","",0,&do_reroute,clear_flag},
#ifdef SIOCSKEEPALIVE
{"keepalive","<0-255>",1,&keepalive,set_int},
#endif
#ifdef SIOCSOUTFILL
{"outfill","<0-255>",1,&outfill,set_int},
#endif
/* Modem options */
{"device","<device>",1,0,add_device},
{"connect","<script>",1,&connector,set_str},
{"disconnect","<script>",1,&disconnector,set_str},
{"lock","",0,&lock_dev,set_flag},
{"speed","<baudrate>",1,&inspeed,set_int},
{"modem","",0,&modem,set_flag},
{"crtscts","",0,&crtscts,set_flag},
{"rotate-devices","",0,&rotate_devices,set_flag},
/* Configuration options */
{"lock-prefix","<path>",1,&lock_prefix,set_str},
{"pidstring","",0,&pidstring,set_flag},
{"-pidstring","",0,&pidstring,clear_flag},
{"run-prefix","<path>",1,&run_prefix,set_str},
{"path-route","<path>",1,&path_route,set_str},
{"path-ifconfig","<path>",1,&path_ifconfig,set_str},
{"path-bootpc","<path>",1,&path_bootpc,set_str},
{"path-pppd","<path>",1,&path_pppd,set_str},
{"buffer-packets","",0,&buffer_packets,set_flag},
{"-buffer-packets","",0,&buffer_packets,clear_flag},
{"buffer_size","<n>",1,&buffer_size,buffer_init},
{"buffer-fifo-dispose","",0,&buffer_fifo_dispose,set_flag},
{"-buffer-fifo-dispose","",0,&buffer_fifo_dispose,clear_flag},
{"buffer-timeout","<n>",1,&buffer_timeout,set_int},
/* Timeouts and connection policy control */
{"route-wait","",0,&route_wait,set_flag},
{"two-way","",0,&two_way,set_flag},
{"give-way","",0,&give_way,set_flag},
{"connect-timeout","<timeout>",1,&connect_timeout,set_int},
{"disconnect-timeout","<timeout>",1,&disconnect_timeout,set_int},
{"redial-timeout","<timeout>",1,&redial_timeout,set_int},
{"nodev-retry-timeout","<timeout>",1,&nodev_retry_timeout,set_int},
{"stop-dial-timeout","<timeout>",1,&stop_dial_timeout,set_int},
{"kill-timeout","<timeout>",1,&kill_timeout,set_int},
{"start-pppd-timeout","<timeout>",1,&start_pppd_timeout,set_int},
{"stop-pppd-timeout","<timeout>",1,&stop_pppd_timeout,set_int},
{"first-packet-timeout","<timeout>",1,&first_packet_timeout,set_int},
{"retry-count","<count>",1,&retry_count,set_int},
{"died-retry-count","<count>",1,&died_retry_count,set_int},
{"redial-backoff-start","<count>",1,&redial_backoff_start,set_int},
{"redial-backoff-limit","<time>",1,&redial_backoff_limit,set_int},
{"dial-fail-limit","<count>",1,&dial_fail_limit,set_int},
/* Filter rules */
{"prule","<name> <protocol> <spec>",3,0,&parse_prule},
{"var","<name> <spec>",2,0,&parse_var},
{"restrict","<start-time> <end-time> <weekday> <day> <month>",5,0,&parse_restrict},
{"or-restrict","<start-time> <end-time> <weekday> <day> <month>",5,0,&parse_or_restrict},
{"bringup","<protocol-rule> <timeout> <packet-rule>",3,0,&parse_bringup},
{"keepup","<protocol-rule> <timeout> <packet-rule>",3,0,&parse_keepup},
{"accept","<protocol-rule> <timeout> <packet-rule>",3,0,&parse_accept},
{"ignore","<protocol-rule> <packet-rule>",2,0,&parse_ignore},
{"impulse","[<duration>,<fuzz>|<duration1>,<duration2>,<fuzz>]",1,0,&parse_impulse},
{"up","",0,0,&parse_up},
{"down","",0,0,&parse_down},
{"flushfilters","",0,0,&flush_filters},
{"flushprules","",0,0,&flush_prules},
{"flushvars","",0,0,&flush_vars},
{0,0,0,0}
};
void init_vars()
{
devices = 0;
device_count = 0;
inspeed = DEFAULT_SPEED;
window = 0;
mtu = DEFAULT_MTU;
mru = DEFAULT_MTU;
connector = 0;
disconnector = 0;
local_ip = 0;
local_addr = 0;
orig_local_ip = 0;
netmask = 0;
remote_ip = 0;
orig_remote_ip = 0;
addroute = 0;
delroute = 0;
ip_up = 0;
ip_down = 0;
acctlog = 0;
pidlog = "diald.pid";
fifoname = 0;
acctfp = 0;
mode = MODE_SLIP;
debug = 0;
modem = 0;
crtscts = 0;
daemon_flag = 1;
slip_encap = 0;
lock_dev = 0;
default_route = 0;
strict_forwarding = 0;
dynamic_addrs = 0;
dynamic_mode = DMODE_REMOTE_LOCAL;
rotate_devices = 0;
two_way = 0;
do_reroute = UNSAFE_ROUTING;
proxyarp = 0;
route_wait = 0;
connect_timeout = 60;
disconnect_timeout = 60;
redial_timeout = DEFAULT_DIAL_DELAY;
nodev_retry_timeout = 1;
stop_dial_timeout = 60;
kill_timeout = 60;
start_pppd_timeout = 60;
stop_pppd_timeout = 60;
first_packet_timeout = DEFAULT_FIRST_PACKET_TIMEOUT;
retry_count = 0;
died_retry_count = 1;
redial_backoff_start = -1;
redial_backoff_limit = 600;
dial_fail_limit = 0;
lock_prefix = LOCK_PREFIX;
pidstring = PIDSTRING;
run_prefix = RUN_PREFIX;
path_route = PATH_ROUTE;
path_ifconfig = PATH_IFCONFIG;
path_bootpc = PATH_BOOTPC;
path_pppd = PATH_PPPD;
buffer_packets = BUFFER_PACKETS;
buffer_size = BUFFER_SIZE;
buffer_fifo_dispose = BUFFER_FIFO_DISPOSE;
buffer_timeout = BUFFER_TIMEOUT;
#ifdef SIOCSKEEPALIVE
keepalive = 0;
#endif
#ifdef SIOCSOUTFILL
outfill = 0;
#endif
}
void set_int(int *var, char **argv)
{
*var = atoi(*argv);
}
void set_str(char **var, char **argv)
{
*var = strdup(*argv);
}
void set_mode(char **var, char **argv)
{
if (strcmp(argv[0],"ppp") == 0)
mode = MODE_PPP;
else if (strcmp(argv[0],"dev") == 0)
mode = MODE_DEV;
else if (strcmp(argv[0],"slip") == 0)
mode = MODE_SLIP, slip_encap = 0;
else if (strcmp(argv[0],"cslip") == 0)
mode = MODE_SLIP, slip_encap = 1;
else if (strcmp(argv[0],"slip6") == 0)
mode = MODE_SLIP, slip_encap = 2;
else if (strcmp(argv[0],"cslip6") == 0)
mode = MODE_SLIP, slip_encap = 3;
else if (strcmp(argv[0],"aslip") == 0)
mode = MODE_SLIP, slip_encap = 8;
else
syslog(LOG_ERR,"Unknown mode %s.\nValid modes are: dev, ppp, slip, cslip, slip6, cslip6, or aslip.",argv[0]);
}
void set_dslip_mode(char **var, char **argv)
{
if (strcmp(argv[0],"remote") == 0)
dynamic_mode = DMODE_REMOTE;
else if (strcmp(argv[0],"local") == 0)
dynamic_mode = DMODE_LOCAL;
else if (strcmp(argv[0],"remote-local") == 0)
dynamic_mode = DMODE_REMOTE_LOCAL;
else if (strcmp(argv[0],"local-remote") == 0)
dynamic_mode = DMODE_LOCAL_REMOTE;
else if (strcmp(argv[0],"bootp") == 0)
dynamic_mode = DMODE_BOOTP;
else
syslog(LOG_ERR,"Unknown dynamic slip mode %s.\nValid modes are: remote, local, remote-local, local-remote or bootp.",argv[0]);
}
void set_flag(int *var, char **argv)
{
*var = 1;
}
void clear_flag(int *var, char **argv)
{
*var = 0;
}
void read_config_file(int *var, char **argv)
{
parse_options_file(argv[0]);
}
void usage(void)
{
int i;
syslog(LOG_ERR,"usage: diald [modem-device1] [modem-device2 ...] [options...] [-- [pppd options...]]\n");
syslog(LOG_ERR,"where valid options are:");
for (i = 0; commands[i].str; i++)
syslog(LOG_ERR," %s %s",commands[i].str,commands[i].uargs);
exit(1);
}
void copy_pppd_args(int argc, char *argv[])
{
int i;
#ifdef NO_MEM_LEAKS
if (pppd_argv) {
while (i = 0; i < argc; i++)
free(pppd_argv[i]);
free(pppd_argv);
}
#endif
pppd_argv = malloc(sizeof(char **)*argc);
for (i = 0; i < argc; i++) {
pppd_argv[i] = strdup(argv[i]);
}
pppd_argc = argc;
}
void add_device(void *var, char **argv)
{
device_count++;
if (device_count == 1)
devices = (char **)malloc(sizeof(char *));
else
devices = (char **)realloc(devices,sizeof(char *)*device_count);
devices[device_count-1] = strdup(argv[0]);
}
void parse_args(int argc, char *argv[])
{
int i;
struct stat st;
/* Get any tty devices from the initial arguments */
for (i = 0; argc > 0 && stat(*argv,&st) == 0 && S_ISCHR(st.st_mode); i++) {
add_device(0,argv);
argc--, argv++;
}
/*
* Ok, parse the options list now,
* command line options override/augment defaults
*/
while (argc-- > 0) {
if (strcmp(*argv,"--") == 0) {
argv++;
argc--;
break;
}
for (i = 0; commands[i].str; i++)
if (strcmp(commands[i].str,*argv) == 0)
break;
if (commands[i].parser) {
argc -= commands[i].args;
if (argc < 0) {
syslog(LOG_ERR,"Insufficient arguments to option '%s'",*argv);
usage();
}
(commands[i].parser)(commands[i].var,++argv);
argv += commands[i].args;
} else {
syslog(LOG_ERR,"Unknown option '%s'",*argv);
usage();
}
}
/* Any remaining options are food for pppd */
if (++argc > 0)
copy_pppd_args(argc,argv);
}
void trim_whitespace(char *s)
{
int i;
for (i = strlen(s)-1; i >= 0; i--) {
if (!isspace(s[i]))
break;
s[i] = 0;
}
}
/* Parse the given options file */
void parse_options_file(char *file)
{
char line[MAXLINELEN];
char *argv[MAXARGS];
char *s;
char *t1,*t2;
int argc, i;
FILE *fp = fopen(file,"r");
if (fp == NULL) {
syslog(LOG_ERR,"Unable to open options file %s: %m",file);
return; /* no options file */
}
while (getsn(fp,line,1024) != EOF) {
trim_whitespace(line);
argc = 0;
for (s = line, argc = 0; *s && argc < MAXARGS; s++) {
if (*s == ' ' || *s == '\t')
*s = 0;
else if (*s == '#' && argc == 0) /* the line is a comment */
goto comment;
else if (*s == '\"' || *s == '\'') {
char delim = *s;
/* start of a quoted argument */
s++;
argv[argc] = s;
while (*s) {
if (*s == delim) { *s++ = 0; break; }
if (*s == '\\' && s[1] != 0) s++;
s++;
}
s--;
/* go back and fix up "quoted" characters */
t1 = t2 = argv[argc++];
while (*t1) {
if (*t1 == '\\') {
t1++;
/* do a translation */
switch (*t1) {
case 'a': *t1 = '\a'; break;
case 'b': *t1 = '\b'; break;
case 'f': *t1 = '\f'; break;
case 'n': *t1 = '\n'; break;
case 'r': *t1 = '\r'; break;
case 's': *t1 = ' '; break;
case 't': *t1 = '\t'; break;
default:
if (*t1 >= '0' && *t1 <= '8') {
int val = 0, n;
for (n = 0;
n < 3 && (*t1 >= '0' && *t1 <= '8');
++n) {
val = (val << 3) + (*t1 & 07);
t1++;
}
*(--t1) = val;
break;
}
if (*t1 == 'x') {
int val = 0, n, digit;
t1++;
for (n = 0; n < 2 && isxdigit(*t1); ++n) {
digit = toupper(*t1) -'0';
if (digit > 10)
digit += '0' + 10 - 'A';
val = (val << 4) + digit;
t1++;
}
*(--t1) = val;
break;
}
/* character is itself, don't muck with it. */
}
}
*t2++ = *t1++;
}
*t2++ = 0;
} else { /* just a normal word */
argv[argc++] = s;
while (*s) {
if (*s == ' ' || *s == '\t') break;
s++;
}
s--;
}
}
*s = 0;
if (argc == 0)
goto comment;
for (i = 0; commands[i].str; i++)
if (strcmp(commands[i].str,argv[0]) == 0)
break;
if (commands[i].parser) {
argc -= commands[i].args;
if (argc < 0) {
syslog(LOG_ERR,"Insufficient arguments to option '%s'",argv[0]);
} else {
(commands[i].parser)(commands[i].var,&argv[1]);
}
} else if (strcmp("pppd-options",argv[0]) == 0) {
copy_pppd_args(argc-1,&argv[1]);
} else {
syslog(LOG_ERR,"Unknown option '%s'",*argv);
}
comment:;
}
fclose(fp);
}
void check_setup()
{
struct stat st;
int i;
int flag = 0;
int temp ;
char *p ;
if (device_count == 0) {
flag = 1,
syslog(LOG_ERR,
"No device specified. You must have at least one device!");
} else {
/* This code used to strip a leading /dev/. This is just insane.
* Why put the /dev/ there in the first place for an ether device?
*/
strncpy(device , devices[0], 9);
device[9] = 0;
for (temp = 0; device[temp] && !isdigit(device[temp]); temp++);
strncpy(device_node , device , temp ) ;
p = device + temp + 1;
device_iface = atoi( p );
}
if (mode != MODE_DEV)
for (i = 0; i < device_count; i++)
if (stat(devices[i],&st) < 0 || !S_ISCHR(st.st_mode))
flag = 1,
syslog(LOG_ERR,
"Specified device '%s' not a character device.",devices[0]);
if (!connector)
flag = 1,
syslog(LOG_ERR,
"You must define a connector script (option 'connect').");
if (!remote_ip)
flag = 1, syslog(LOG_ERR,"You must define the remote ip address.");
else if (inet_addr(remote_ip) == -1)
flag = 1, syslog(LOG_ERR,"Bad remote ip address specification.");
if (!local_ip)
flag = 1, syslog(LOG_ERR,"You must define the local ip address.");
else if (inet_addr(local_ip) == -1)
flag = 1, syslog(LOG_ERR,"Bad local ip address specification.");
else
local_addr = inet_addr(local_ip);
if (acctlog && (acctfp = fopen(acctlog,"a")) == NULL)
syslog(LOG_ERR,"Can't open accounting log file %s: %m",acctlog);
else
if (acctfp) fclose(acctfp);
if (flag) {
syslog(LOG_ERR,"Terminating due to damaged reconfigure.");
exit(1);
}
}
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