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dns.c: Load IPv6 DNS resolvers if configured.

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IPv6 nameserver addresses are stored in different part of the
__res_state structure, so look there if we appear to have support for
it.

ASTERISK-28004 #close

Change-Id: I67067077d8a406ee996664518d9c8fbf11f6977d
This commit is contained in:
Sean Bright
2021-09-06 12:37:08 -04:00
committed by Kevin Harwell
parent 976521c9a2
commit 695fc3dbd7
4 changed files with 32 additions and 2 deletions
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17
main/dns.c
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@@ -605,7 +605,22 @@ struct ao2_container *ast_dns_get_nameservers(void)
#endif
for (i = 0; i < state->nscount; i++) {
ast_str_container_add(nameservers, ast_inet_ntoa(state->nsaddr_list[i].sin_addr));
char addr[INET6_ADDRSTRLEN];
const char *addrp = NULL;
/* glibc sets sin_family to 0 when the nameserver is an IPv6 address */
if (state->nsaddr_list[i].sin_family) {
addrp = inet_ntop(AF_INET, &state->nsaddr_list[i].sin_addr, addr, sizeof(addr));
#if defined(HAVE_RES_NINIT) && defined(HAVE_STRUCT___RES_STATE__U__EXT_NSADDRS)
} else if (state->_u._ext.nsaddrs[i]) {
addrp = inet_ntop(AF_INET6, &state->_u._ext.nsaddrs[i]->sin6_addr, addr, sizeof(addr));
#endif
}
if (addrp) {
ast_debug(1, "Discovered nameserver: %s\n", addrp);
ast_str_container_add(nameservers, addrp);
}
}
#ifdef HAVE_RES_NINIT