2014-04-15 00:36:31 +05:30
|
|
|
#include <stdio.h>
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include <string.h>
|
|
|
|
#include <limits.h>
|
|
|
|
#include "ndhc-defines.h"
|
|
|
|
#include "cfg.h"
|
|
|
|
#include "arp.h"
|
|
|
|
#include "ndhc.h"
|
|
|
|
#include "ifchd.h"
|
|
|
|
#include "sockd.h"
|
|
|
|
#include "seccomp.h"
|
|
|
|
#include "nk/log.h"
|
|
|
|
#include "nk/privilege.h"
|
|
|
|
#include "nk/copy_cmdarg.h"
|
|
|
|
|
|
|
|
struct cfgparse {
|
|
|
|
char buf[MAX_BUF];
|
|
|
|
size_t buflen;
|
|
|
|
int ternary; // = 0 nothing, -1 = false, +1 = true
|
|
|
|
int cs;
|
|
|
|
};
|
|
|
|
|
|
|
|
%%{
|
|
|
|
machine cfg_actions;
|
|
|
|
access ccfg.;
|
|
|
|
|
2014-04-16 00:26:35 +05:30
|
|
|
action clear {
|
|
|
|
memset(&ccfg.buf, 0, sizeof ccfg.buf);
|
|
|
|
ccfg.buflen = 0;
|
|
|
|
ccfg.ternary = 0;
|
|
|
|
}
|
2014-04-15 00:36:31 +05:30
|
|
|
action append {
|
|
|
|
if (ccfg.buflen < sizeof ccfg.buf - 1)
|
|
|
|
ccfg.buf[ccfg.buflen++] = *p;
|
|
|
|
else
|
|
|
|
suicide("line or option is too long");
|
|
|
|
}
|
|
|
|
action term {
|
|
|
|
if (ccfg.buflen < sizeof ccfg.buf)
|
|
|
|
ccfg.buf[ccfg.buflen] = 0;
|
|
|
|
}
|
|
|
|
action truval { ccfg.ternary = 1; }
|
|
|
|
action falsval { ccfg.ternary = -1; }
|
|
|
|
|
|
|
|
action clientid { get_clientid_string(ccfg.buf, ccfg.buflen); }
|
|
|
|
action background {
|
|
|
|
switch (ccfg.ternary) {
|
|
|
|
case 1:
|
|
|
|
client_config.background_if_no_lease = 1;
|
|
|
|
gflags_detach = 1;
|
|
|
|
break;
|
|
|
|
case -1:
|
|
|
|
client_config.background_if_no_lease = 0;
|
|
|
|
gflags_detach = 0;
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
action pidfile {
|
|
|
|
copy_cmdarg(pidfile, ccfg.buf, sizeof pidfile, "pidfile");
|
|
|
|
}
|
|
|
|
action hostname {
|
|
|
|
copy_cmdarg(client_config.hostname, ccfg.buf,
|
|
|
|
sizeof client_config.hostname, "hostname");
|
|
|
|
}
|
|
|
|
action interface {
|
|
|
|
copy_cmdarg(client_config.interface, ccfg.buf,
|
|
|
|
sizeof client_config.interface, "interface");
|
|
|
|
}
|
|
|
|
action now {
|
|
|
|
switch (ccfg.ternary) {
|
|
|
|
case 1: client_config.abort_if_no_lease = 1; break;
|
|
|
|
case -1: client_config.abort_if_no_lease = 0; default: break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
action quit {
|
|
|
|
switch (ccfg.ternary) {
|
|
|
|
case 1: client_config.quit_after_lease = 1; break;
|
|
|
|
case -1: client_config.quit_after_lease = 0; default: break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
action request { set_client_addr(ccfg.buf); }
|
|
|
|
action vendorid {
|
|
|
|
copy_cmdarg(client_config.vendor, ccfg.buf,
|
|
|
|
sizeof client_config.vendor, "vendorid");
|
|
|
|
}
|
|
|
|
action user {
|
|
|
|
if (nk_uidgidbyname(ccfg.buf, &ndhc_uid, &ndhc_gid))
|
|
|
|
suicide("invalid ndhc user '%s' specified", ccfg.buf);
|
|
|
|
}
|
|
|
|
action ifch_user {
|
|
|
|
if (nk_uidgidbyname(ccfg.buf, &ifch_uid, &ifch_gid))
|
|
|
|
suicide("invalid ifch user '%s' specified", ccfg.buf);
|
|
|
|
}
|
|
|
|
action sockd_user {
|
|
|
|
if (nk_uidgidbyname(ccfg.buf, &sockd_uid, &sockd_gid))
|
|
|
|
suicide("invalid sockd user '%s' specified", ccfg.buf);
|
|
|
|
}
|
|
|
|
action chroot {
|
|
|
|
copy_cmdarg(chroot_dir, ccfg.buf, sizeof chroot_dir, "chroot");
|
|
|
|
}
|
|
|
|
action state_dir {
|
|
|
|
copy_cmdarg(state_dir, ccfg.buf, sizeof state_dir, "state-dir");
|
|
|
|
}
|
|
|
|
action seccomp_enforce {
|
|
|
|
switch (ccfg.ternary) {
|
|
|
|
case 1: seccomp_enforce = true; break;
|
|
|
|
case -1: seccomp_enforce = false; default: break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
action relentless_defense {
|
|
|
|
switch (ccfg.ternary) {
|
|
|
|
case 1: set_arp_relentless_def(true); break;
|
|
|
|
case -1: set_arp_relentless_def(false); default: break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
action arp_probe_wait {
|
|
|
|
int t = atoi(ccfg.buf);
|
|
|
|
if (t >= 0)
|
|
|
|
arp_probe_wait = t;
|
|
|
|
}
|
|
|
|
action arp_probe_num {
|
|
|
|
int t = atoi(ccfg.buf);
|
|
|
|
if (t >= 0)
|
|
|
|
arp_probe_num = t;
|
|
|
|
}
|
|
|
|
action arp_probe_min {
|
|
|
|
int t = atoi(ccfg.buf);
|
|
|
|
arp_probe_min = t;
|
|
|
|
if (arp_probe_min > arp_probe_max) {
|
|
|
|
t = arp_probe_max;
|
|
|
|
arp_probe_max = arp_probe_min;
|
|
|
|
arp_probe_min = t;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
action arp_probe_max {
|
|
|
|
int t = atoi(ccfg.buf);
|
|
|
|
arp_probe_max = t;
|
|
|
|
if (arp_probe_min > arp_probe_max) {
|
|
|
|
t = arp_probe_max;
|
|
|
|
arp_probe_max = arp_probe_min;
|
|
|
|
arp_probe_min = t;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
action gw_metric {
|
|
|
|
char *q;
|
|
|
|
long mt = strtol(ccfg.buf, &q, 10);
|
|
|
|
if (q == ccfg.buf)
|
|
|
|
suicide("gw-metric arg '%s' isn't a valid number", ccfg.buf);
|
|
|
|
if (mt > INT_MAX)
|
|
|
|
suicide("gw-metric arg '%s' is too large", ccfg.buf);
|
|
|
|
if (mt < 0)
|
|
|
|
mt = 0;
|
|
|
|
client_config.metric = (int)mt;
|
|
|
|
}
|
|
|
|
action resolv_conf {
|
|
|
|
copy_cmdarg(resolv_conf_d, ccfg.buf, sizeof resolv_conf_d,
|
|
|
|
"resolv-conf");
|
|
|
|
}
|
|
|
|
action dhcp_set_hostname {
|
|
|
|
switch (ccfg.ternary) {
|
|
|
|
case 1: allow_hostname = 1; break;
|
|
|
|
case -1: allow_hostname = 0; default: break;
|
|
|
|
}
|
|
|
|
}
|
2015-02-14 02:55:36 +05:30
|
|
|
action rfkill_idx {
|
|
|
|
uint32_t t = atoi(ccfg.buf);
|
|
|
|
client_config.rfkillIdx = t;
|
|
|
|
client_config.enable_rfkill = 1;
|
|
|
|
}
|
2014-04-15 00:36:31 +05:30
|
|
|
action version { print_version(); exit(EXIT_SUCCESS); }
|
|
|
|
action help { show_usage(); exit(EXIT_SUCCESS); }
|
|
|
|
}%%
|
|
|
|
|
|
|
|
%%{
|
|
|
|
machine file_cfg;
|
|
|
|
access ccfg.;
|
|
|
|
include cfg_actions;
|
|
|
|
|
|
|
|
spc = [ \t];
|
|
|
|
delim = spc* '=' spc*;
|
|
|
|
string = [^\n]+ >clear $append %term;
|
|
|
|
term = '\n';
|
|
|
|
value = delim string term;
|
|
|
|
truval = ('true'|'1') % truval;
|
|
|
|
falsval = ('false'|'0') % falsval;
|
|
|
|
boolval = delim (truval|falsval) term;
|
|
|
|
|
|
|
|
blankline = term;
|
|
|
|
|
|
|
|
clientid = 'clientid' value @clientid;
|
2014-04-21 18:32:58 +05:30
|
|
|
background = 'background' boolval @background;
|
2014-04-15 00:36:31 +05:30
|
|
|
pidfile = 'pidfile' value @pidfile;
|
|
|
|
hostname = 'hostname' value @hostname;
|
|
|
|
interface = 'interface' value @interface;
|
|
|
|
now = 'now' boolval @now;
|
|
|
|
quit = 'quit' boolval @quit;
|
|
|
|
request = 'request' value @request;
|
|
|
|
vendorid = 'vendorid' value @vendorid;
|
|
|
|
user = 'user' value @user;
|
|
|
|
ifch_user = 'ifch-user' value @ifch_user;
|
|
|
|
sockd_user = 'sockd-user' value @sockd_user;
|
|
|
|
chroot = 'chroot' value @chroot;
|
|
|
|
state_dir = 'state-dir' value @state_dir;
|
|
|
|
seccomp_enforce = 'seccomp-enforce' boolval @seccomp_enforce;
|
|
|
|
relentless_defense = 'relentless-defense' boolval @relentless_defense;
|
|
|
|
arp_probe_wait = 'arp-probe-wait' value @arp_probe_wait;
|
|
|
|
arp_probe_num = 'arp-probe-num' value @arp_probe_num;
|
|
|
|
arp_probe_min = 'arp-probe-min' value @arp_probe_min;
|
|
|
|
arp_probe_max = 'arp-probe-max' value @arp_probe_max;
|
|
|
|
gw_metric = 'gw-metric' value @gw_metric;
|
|
|
|
resolv_conf = 'resolv-conf' value @resolv_conf;
|
|
|
|
dhcp_set_hostname = 'dhcp-set-hostname' boolval @dhcp_set_hostname;
|
2015-02-14 02:55:36 +05:30
|
|
|
rfkill_idx = 'rfkill-idx' value @rfkill_idx;
|
2014-04-15 00:36:31 +05:30
|
|
|
|
|
|
|
main := blankline |
|
|
|
|
clientid | background | pidfile | hostname | interface | now | quit |
|
|
|
|
request | vendorid | user | ifch_user | sockd_user | chroot |
|
|
|
|
state_dir | seccomp_enforce | relentless_defense | arp_probe_wait |
|
|
|
|
arp_probe_num | arp_probe_min | arp_probe_max | gw_metric |
|
2015-02-14 02:55:36 +05:30
|
|
|
resolv_conf | dhcp_set_hostname | rfkill_idx
|
2014-04-15 00:36:31 +05:30
|
|
|
;
|
|
|
|
}%%
|
|
|
|
|
|
|
|
%% write data;
|
|
|
|
|
|
|
|
static void parse_cfgfile(const char *fname)
|
|
|
|
{
|
|
|
|
struct cfgparse ccfg;
|
|
|
|
memset(&ccfg, 0, sizeof ccfg);
|
|
|
|
FILE *f = fopen(fname, "r");
|
|
|
|
if (!f)
|
|
|
|
suicide("Unable to open config file '%s'.", fname);
|
|
|
|
char l[MAX_BUF];
|
|
|
|
size_t linenum = 0;
|
|
|
|
while (linenum++, fgets(l, sizeof l, f)) {
|
|
|
|
size_t llen = strlen(l);
|
|
|
|
const char *p = l;
|
|
|
|
const char *pe = l + llen;
|
|
|
|
%% write init;
|
|
|
|
%% write exec;
|
|
|
|
|
|
|
|
if (ccfg.cs == file_cfg_error)
|
|
|
|
suicide("error parsing config file line %zu: malformed", linenum);
|
|
|
|
if (ccfg.cs < file_cfg_first_final)
|
|
|
|
suicide("error parsing config file line %zu: incomplete", linenum);
|
|
|
|
}
|
|
|
|
fclose(f);
|
|
|
|
}
|
|
|
|
|
|
|
|
%%{
|
|
|
|
machine cmd_cfg;
|
|
|
|
access ccfg.;
|
|
|
|
include cfg_actions;
|
|
|
|
|
|
|
|
action cfgfile { parse_cfgfile(ccfg.buf); }
|
|
|
|
action tbv { ccfg.ternary = 1; }
|
|
|
|
|
|
|
|
string = [^\0]+ >clear $append %term;
|
|
|
|
argval = 0 string 0;
|
|
|
|
tbv = 0 % tbv;
|
|
|
|
|
|
|
|
cfgfile = ('-c'|'--config') argval @cfgfile;
|
|
|
|
clientid = ('-I'|'--clientid') argval @clientid;
|
|
|
|
background = ('-b'|'--background') tbv @background;
|
|
|
|
pidfile = ('-p'|'--pidfile') argval @pidfile;
|
|
|
|
hostname = ('-h'|'--hostname') argval @hostname;
|
|
|
|
interface = ('-i'|'--interface') argval @interface;
|
|
|
|
now = ('-n'|'--now') tbv @now;
|
|
|
|
quit = ('-q'|'--quit') tbv @quit;
|
|
|
|
request = ('-r'|'--request') argval @request;
|
|
|
|
vendorid = ('-V'|'--vendorid') argval @vendorid;
|
|
|
|
user = ('-u'|'--user') argval @user;
|
|
|
|
ifch_user = ('-U'|'--ifch-user') argval @ifch_user;
|
|
|
|
sockd_user = ('-D'|'--sockd-user') argval @sockd_user;
|
|
|
|
chroot = ('-C'|'--chroot') argval @chroot;
|
|
|
|
state_dir = ('-s'|'--state-dir') argval @state_dir;
|
|
|
|
seccomp_enforce = ('-S'|'--seccomp-enforce') tbv @seccomp_enforce;
|
|
|
|
relentless_defense = ('-d'|'--relentless-defense') tbv @relentless_defense;
|
|
|
|
arp_probe_wait = ('-w'|'--arp-probe-wait') argval @arp_probe_wait;
|
|
|
|
arp_probe_num = ('-W'|'--arp-probe-num') argval @arp_probe_num;
|
|
|
|
arp_probe_min = ('-m'|'--arp-probe-min') argval @arp_probe_min;
|
|
|
|
arp_probe_max = ('-M'|'--arp-probe-max') argval @arp_probe_max;
|
|
|
|
gw_metric = ('-t'|'--gw-metric') argval @gw_metric;
|
|
|
|
resolv_conf = ('-R'|'--resolv-conf') argval @resolv_conf;
|
|
|
|
dhcp_set_hostname = ('-H'|'--dhcp-set-hostname') tbv @dhcp_set_hostname;
|
2015-02-14 02:55:36 +05:30
|
|
|
rfkill_idx = ('-K'|'--rfkill-idx') argval @rfkill_idx;
|
2014-04-15 00:36:31 +05:30
|
|
|
version = ('-v'|'--version') 0 @version;
|
|
|
|
help = ('-?'|'--help') 0 @help;
|
|
|
|
|
|
|
|
main := (
|
|
|
|
cfgfile | clientid | background | pidfile | hostname | interface |
|
|
|
|
now | quit | request | vendorid | user | ifch_user | sockd_user |
|
|
|
|
chroot | state_dir | seccomp_enforce | relentless_defense |
|
|
|
|
arp_probe_wait | arp_probe_num | arp_probe_min | arp_probe_max |
|
2015-02-14 02:55:36 +05:30
|
|
|
gw_metric | resolv_conf | dhcp_set_hostname | rfkill_idx |
|
|
|
|
version | help
|
2014-04-15 00:36:31 +05:30
|
|
|
)*;
|
|
|
|
}%%
|
|
|
|
|
|
|
|
%% write data;
|
|
|
|
|
|
|
|
void parse_cmdline(int argc, char *argv[])
|
|
|
|
{
|
|
|
|
char argb[8192];
|
|
|
|
size_t argbl = 0;
|
|
|
|
for (size_t i = 1; i < (size_t)argc; ++i) {
|
|
|
|
ssize_t snl;
|
|
|
|
if (i > 1)
|
|
|
|
snl = snprintf(argb + argbl, sizeof argb - argbl, "%c%s",
|
|
|
|
0, argv[i]);
|
|
|
|
else
|
|
|
|
snl = snprintf(argb + argbl, sizeof argb - argbl, "%s", argv[i]);
|
|
|
|
if (snl < 0 || (size_t)snl >= sizeof argb)
|
|
|
|
suicide("error parsing command line option: option too long");
|
|
|
|
argbl += snl;
|
|
|
|
}
|
2014-04-21 21:34:13 +05:30
|
|
|
if (argbl == 0)
|
|
|
|
return;
|
2014-04-15 00:36:31 +05:30
|
|
|
struct cfgparse ccfg;
|
|
|
|
memset(&ccfg, 0, sizeof ccfg);
|
|
|
|
const char *p = argb;
|
|
|
|
const char *pe = argb + argbl + 1;
|
|
|
|
const char *eof = pe;
|
|
|
|
|
|
|
|
%% write init;
|
|
|
|
%% write exec;
|
|
|
|
|
|
|
|
if (ccfg.cs == cmd_cfg_error)
|
|
|
|
suicide("error parsing command line option: malformed");
|
|
|
|
if (ccfg.cs >= cmd_cfg_first_final)
|
|
|
|
return;
|
|
|
|
suicide("error parsing command line option: incomplete");
|
|
|
|
}
|
|
|
|
|