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changed -d to -t; -d is now for daemonizing, removed -f; drop privileges if run as root and in daemon mode and chroot

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This commit is contained in:
git@daemon.de
2015-04-27 14:04:57 +02:00
parent b34aab38b6
commit e8d40a7dc5
8 changed files with 198 additions and 87 deletions
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77
udpxd.c
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@@ -26,7 +26,7 @@
/* global client list */
client_t *clients = NULL;
int VERBOSE = 0;
int FORKED = 1;
int FORKED = 0;
/* parse ip:port */
int parse_ip(char *src, char *ip, char *pt) {
@@ -87,23 +87,47 @@ int parse_ip(char *src, char *ip, char *pt) {
void usage() {
fprintf(stderr,
"Usage: udpxd [-lbdfpvhV]\n\n"
"Options:\n"
"--listen -l <ip:port> listen for incoming requests\n"
"--bind -b <ip> bind ip used for outgoing requests\n"
"--to -t <ip:port> destination to forward requests to\n"
"--daemon -d daemon mode, fork into background\n"
"--pidfile -p <file> pidfile, default: /var/run/udpxd.pid\n"
"--user -u <user> run as user (only in daemon mode)\n"
"--chroot -c <path> chroot to <path> (only in daemon mode)\n"
"--help -h -? print help message\n"
"--version -V print program version\n"
"--verbose -v enable verbose logging\n\n"
"Options -l and -t are mandatory.\n\n"
"This is udpxd version %s.\n", UDPXD_VERSION
);
}
int main ( int argc, char* argv[] ) {
int opt, err;
char *inip, *inpt, *srcip, *dstip, *dstpt;
char pidfile[MAX_BUFFER_SIZE];
char user[128];
char chroot[MAX_BUFFER_SIZE];
err = 0;
static struct option longopts[] = {
{ "listen", required_argument, NULL, 'l' },
{ "bind", required_argument, NULL, 'b' },
{ "dest", required_argument, NULL, 'd' },
{ "version", no_argument, NULL, 'v' },
{ "to", required_argument, NULL, 't' },
{ "version", no_argument, NULL, 'V' },
{ "help", no_argument, NULL, 'h' },
{ "verbose", no_argument, NULL, 'V' },
{ "foreground",no_argument, NULL, 'f' },
{ "verbose", no_argument, NULL, 'v' },
{ "daemon", no_argument, NULL, 'd' },
{ "pidfile", required_argument, NULL, 'p' },
{ "user", required_argument, NULL, 'u' },
{ "chroot", required_argument, NULL, 'c' },
};
if( argc < 2 ) {
@@ -112,23 +136,27 @@ int main ( int argc, char* argv[] ) {
}
srcip = dstip = inip = dstpt = inpt = NULL;
/* set defaults */
strncpy(pidfile, "/var/run/udpxd.pid", 19);
strncpy(user, "nobody", 7);
strncpy(chroot, "/var/empty", 11);
while ((opt = getopt_long(argc, argv, "l:b:d:vfVh?", longopts, NULL)) != -1) {
while ((opt = getopt_long(argc, argv, "l:b:t:u:c:vdVh?", longopts, NULL)) != -1) {
switch (opt) {
case 'v':
case 'V':
fprintf(stderr, "This is %s version %s\n", argv[0], UDPXD_VERSION);
return 1;
break;
case 'f':
FORKED = 0;
case 'd':
FORKED = 1;
break;
case 'h':
case '?':
usage();
return 1;
break;
case 'V':
case 'v':
VERBOSE = 1;
break;
case 'l':
@@ -139,7 +167,7 @@ int main ( int argc, char* argv[] ) {
err = 1;
}
break;
case 'd':
case 't':
dstip = malloc(INET6_ADDRSTRLEN+1);
dstpt = malloc(6);
if (parse_ip(optarg, dstip, dstpt) != 0) {
@@ -158,6 +186,12 @@ int main ( int argc, char* argv[] ) {
case 'p':
strncpy(pidfile, optarg, strlen(optarg));
break;
case 'u':
strncpy(user, optarg, strlen(optarg));
break;
case 'c':
strncpy(chroot, optarg, strlen(optarg));
break;
default:
usage();
return 1;
@@ -172,7 +206,7 @@ int main ( int argc, char* argv[] ) {
}
if(dstip == NULL) {
fprintf(stderr, "-d parameter is required!\n");
fprintf(stderr, "-t parameter is required!\n");
usage();
err = 1;
}
@@ -185,7 +219,7 @@ int main ( int argc, char* argv[] ) {
}
if(! err) {
err = start_listener (inip, inpt, srcip, dstip, dstpt, pidfile);
err = start_listener (inip, inpt, srcip, dstip, dstpt, pidfile, chroot, user);
}
if(srcip != NULL)
@@ -201,20 +235,3 @@ int main ( int argc, char* argv[] ) {
return err;
}
void usage() {
fprintf(stderr,
"Usage: udpxd [-lbdfpvhV]\n\n"
"Options:\n"
"--listen -l <ip:port> listen for incoming requests\n"
"--bind -b <ip> bind ip used for outgoing requests\n"
"--dest -d <ip:port> destination to forward requests to\n"
"--foreground -f don't fork into background\n"
"--pidfile -p <file> pidfile, default: /var/run/udpxd.pid\n"
"--help -h -? print help message\n"
"--version -v print program version\n"
"--verbose -V enable verbose logging\n\n"
"Options -l and -d are mandatory.\n\n"
"This is udpxd version %s.\n", UDPXD_VERSION
);
}