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Diffstat (limited to 'src/resolve/resolved-dns-server.c')
| -rw-r--r-- | src/resolve/resolved-dns-server.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/resolve/resolved-dns-server.c b/src/resolve/resolved-dns-server.c index bcbfa69aff..7226111c07 100644 --- a/src/resolve/resolved-dns-server.c +++ b/src/resolve/resolved-dns-server.c @@ -21,6 +21,7 @@ #include "alloc-util.h" #include "resolved-dns-server.h" +#include "resolved-dns-stub.h" #include "resolved-resolv-conf.h" #include "siphash24.h" #include "string-table.h" @@ -750,6 +751,19 @@ void manager_next_dns_server(Manager *m) { manager_set_dns_server(m, m->dns_servers); } +bool dns_server_address_valid(int family, const union in_addr_union *sa) { + + /* Refuses the 0 IP addresses as well as 127.0.0.53 (which is our own DNS stub) */ + + if (in_addr_is_null(family, sa)) + return false; + + if (family == AF_INET && sa->in.s_addr == htobe32(INADDR_DNS_STUB)) + return false; + + return true; +} + static const char* const dns_server_type_table[_DNS_SERVER_TYPE_MAX] = { [DNS_SERVER_SYSTEM] = "system", [DNS_SERVER_FALLBACK] = "fallback", |