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Updated AppDelegate.m so that IPv6 addresses are used for DNS

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This commit is contained in:
David Southgate 2019-01-16 16:37:38 +00:00
parent e0f3b48688
commit 8d7e2006e2
1 changed files with 25 additions and 22 deletions
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47
app/AppDelegate.m
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@ -65,31 +65,34 @@ static void ios_handle_exit(int code) {
exit_hook = ios_handle_exit;
// configure dns
struct __res_state res;
err = res_ninit(&res);
res_state _state;
_state = malloc(sizeof(struct __res_state));
if (EXIT_SUCCESS != res_ninit(_state)) {
free(_state);
exit(2);
}
NSMutableString *resolvConf = [NSMutableString new];
for (int i = 0; res.dnsrch[i] != NULL; i++) {
[resolvConf appendFormat:@"search %s\n", res.dnsrch[i]];
union res_sockaddr_union servers[NI_MAXSERV];
int serversFound = res_9_getservers(_state, servers, NI_MAXSERV);
char address[NI_MAXHOST];
for (int i = 0; i < serversFound; i ++) {
union res_sockaddr_union s = servers[i];
if (s.sin.sin_len > 0) {
getnameinfo((struct sockaddr *)&s.sin,
(socklen_t)s.sin.sin_len,
(char *)&address,
sizeof(address),
nil,
0,
NI_NUMERICHOST);
[resolvConf appendFormat:@"nameserver %s\n", address];
}
}
int ns_count = 0;
for (int i = 0; i < res.nscount; i++) {
if (res.nsaddr_list[i].sin_len == 0)
continue;
char address[100];
getnameinfo((struct sockaddr *) &res.nsaddr_list[i],
sizeof(res.nsaddr_list[i]), address,
sizeof(address), NULL, 0, NI_NUMERICHOST);
[resolvConf appendFormat:@"nameserver %s\n", address];
ns_count++;
}
// Use default nameservers if none were found
if (ns_count == 0) {
[resolvConf appendFormat:@"nameserver 1.1.1.1\n"];
[resolvConf appendFormat:@"nameserver 1.0.0.1\n"];
}
free(_state);
struct fd *fd = generic_open("/etc/resolv.conf", O_WRONLY_ | O_CREAT_ | O_TRUNC_, 0666);
if (!IS_ERR(fd)) {