From 87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3 Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Tue, 12 Aug 2014 12:21:10 +0200 Subject: resolved: filter out duplicate DNS servers when writing resolv.conf --- src/resolve/resolved-dns-server.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 'src/resolve/resolved-dns-server.c') diff --git a/src/resolve/resolved-dns-server.c b/src/resolve/resolved-dns-server.c index 30d9c8b34e..043f6b637d 100644 --- a/src/resolve/resolved-dns-server.c +++ b/src/resolve/resolved-dns-server.c @@ -19,6 +19,8 @@ along with systemd; If not, see . ***/ +#include "siphash24.h" + #include "resolved-dns-server.h" int dns_server_new( @@ -97,3 +99,24 @@ DnsServer* dns_server_free(DnsServer *s) { return NULL; } + +unsigned long dns_server_hash_func(const void *p, const uint8_t hash_key[HASH_KEY_SIZE]) { + const DnsServer *s = p; + uint64_t u; + + siphash24((uint8_t*) &u, &s->address, FAMILY_ADDRESS_SIZE(s->family), hash_key); + u = u * hash_key[0] + u + s->family; + + return u; +} + +int dns_server_compare_func(const void *a, const void *b) { + const DnsServer *x = a, *y = b; + + if (x->family < y->family) + return -1; + if (x->family > y->family) + return 1; + + return memcmp(&x->address, &y->address, FAMILY_ADDRESS_SIZE(x->family)); +} -- cgit v1.2.3-54-g00ecf