summaryrefslogtreecommitdiff
path: root/src/nss-myhostname/ifconf.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/nss-myhostname/ifconf.h')
-rw-r--r--src/nss-myhostname/ifconf.h74
1 files changed, 74 insertions, 0 deletions
diff --git a/src/nss-myhostname/ifconf.h b/src/nss-myhostname/ifconf.h
new file mode 100644
index 0000000000..6b2c83f91e
--- /dev/null
+++ b/src/nss-myhostname/ifconf.h
@@ -0,0 +1,74 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#ifndef fooifconfhfoo
+#define fooifconfhfoo
+
+#include <sys/socket.h>
+
+/***
+ This file is part of nss-myhostname.
+
+ Copyright 2008-2011 Lennart Poettering
+
+ nss-myhostname is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public License
+ as published by the Free Software Foundation; either version 2.1 of
+ the License, or (at your option) any later version.
+
+ nss-myhostname is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with nss-myhostname; If not, see
+ <http://www.gnu.org/licenses/>.
+***/
+
+#include <inttypes.h>
+#include <sys/types.h>
+#include <assert.h>
+
+struct address {
+ unsigned char family;
+ uint8_t address[16];
+ unsigned char scope;
+ int ifindex;
+};
+
+#define _public_ __attribute__ ((visibility("default")))
+#define _hidden_ __attribute__ ((visibility("hidden")))
+
+int ifconf_acquire_addresses(struct address **_list, unsigned *_n_list) _hidden_;
+
+static inline size_t PROTO_ADDRESS_SIZE(int proto) {
+ assert(proto == AF_INET || proto == AF_INET6);
+
+ return proto == AF_INET6 ? 16 : 4;
+}
+
+static inline int address_compare(const void *_a, const void *_b) {
+ const struct address *a = _a, *b = _b;
+
+ /* Order lowest scope first, IPv4 before IPv6, lowest interface index first */
+
+ if (a->scope < b->scope)
+ return -1;
+ if (a->scope > b->scope)
+ return 1;
+
+ if (a->family == AF_INET && b->family == AF_INET6)
+ return -1;
+ if (a->family == AF_INET6 && b->family == AF_INET)
+ return 1;
+
+ if (a->ifindex < b->ifindex)
+ return -1;
+ if (a->ifindex > b->ifindex)
+ return 1;
+
+ return 0;
+}
+
+
+#endif