/* nonblocking gethostbyname(), ip (IPADDR) + error (int, 0 = not error) is
written to pipe when found PID of the resolver child is returned */
int net_gethostbyname_nonblock(const char *addr, GIOChannel *pipe)
{
RESOLVED_IP_REC rec;
const char *errorstr;
#ifndef WIN32
int pid;
#endif
g_return_val_if_fail(addr != NULL, FALSE);
#ifndef WIN32
pid = fork();
if (pid > 0) {
/* parent */
pidwait_add(pid);
return pid;
}
if (pid != 0) {
/* failed! */
g_warning("net_connect_thread(): fork() failed! "
"Using blocking resolving");
}
#endif
/* child */
memset(&rec, 0, sizeof(rec));
rec.error = net_gethostbyname(addr, &rec.ip4, &rec.ip6);
if (rec.error == 0) {
errorstr = NULL;
} else {
errorstr = net_gethosterror(rec.error);
rec.errlen = errorstr == NULL ? 0 : strlen(errorstr)+1;
}
g_io_channel_write_block(pipe, &rec, sizeof(rec));
if (rec.errlen != 0)
g_io_channel_write_block(pipe, (void *) errorstr, rec.errlen);
#ifndef WIN32
if (pid == 0)
_exit(99);
#endif
/* we used blocking lookup */
return 0;
}
/* nonblocking gethostbyname(), ip (IPADDR) + error (int, 0 = not error) is
written to pipe when found PID of the resolver child is returned */
int net_gethostbyname_nonblock(const char *addr, GIOChannel *pipe,
int reverse_lookup)
{
RESOLVED_IP_REC rec;
const char *errorstr;
int pid;
int len;
g_return_val_if_fail(addr != NULL, FALSE);
pid = fork();
if (pid > 0) {
/* parent */
pidwait_add(pid);
return pid;
}
if (pid != 0) {
/* failed! */
g_warning("net_connect_thread(): fork() failed! "
"Using blocking resolving");
}
/* child */
srand(time(NULL));
memset(&rec, 0, sizeof(rec));
rec.error = net_gethostbyname(addr, &rec.ip4, &rec.ip6);
if (rec.error == 0) {
errorstr = NULL;
if (reverse_lookup) {
/* reverse lookup the IP, ignore any error */
if (rec.ip4.family != 0)
net_gethostbyaddr(&rec.ip4, &rec.host4);
if (rec.ip6.family != 0)
net_gethostbyaddr(&rec.ip6, &rec.host6);
}
} else {
errorstr = net_gethosterror(rec.error);
rec.errlen = errorstr == NULL ? 0 : strlen(errorstr)+1;
}
g_io_channel_write_block(pipe, &rec, sizeof(rec));
if (rec.errlen != 0)
g_io_channel_write_block(pipe, (void *) errorstr, rec.errlen);
else {
if (rec.host4) {
len = strlen(rec.host4) + 1;
g_io_channel_write_block(pipe, (void *) &len,
sizeof(int));
g_io_channel_write_block(pipe, (void *) rec.host4,
len);
}
if (rec.host6) {
len = strlen(rec.host6) + 1;
g_io_channel_write_block(pipe, (void *) &len,
sizeof(int));
g_io_channel_write_block(pipe, (void *) rec.host6,
len);
}
}
if (pid == 0)
_exit(99);
/* we used blocking lookup */
return 0;
}
