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-rw-r--r--src/libsystemd/sd-rtnl/local-addresses.c117
-rw-r--r--src/libsystemd/sd-rtnl/local-addresses.h3
-rw-r--r--src/libsystemd/sd-rtnl/rtnl-message.c15
-rw-r--r--src/libsystemd/sd-rtnl/test-local-addresses.c58
4 files changed, 189 insertions, 4 deletions
diff --git a/src/libsystemd/sd-rtnl/local-addresses.c b/src/libsystemd/sd-rtnl/local-addresses.c
index c5508856c8..3ab99420a3 100644
--- a/src/libsystemd/sd-rtnl/local-addresses.c
+++ b/src/libsystemd/sd-rtnl/local-addresses.c
@@ -30,14 +30,19 @@ static int address_compare(const void *_a, const void *_b) {
/* Order lowest scope first, IPv4 before IPv6, lowest interface index first */
+ if (a->family == AF_INET && b->family == AF_INET6)
+ return -1;
+ if (a->family == AF_INET6 && b->family == AF_INET)
+ return 1;
+
if (a->scope < b->scope)
return -1;
if (a->scope > b->scope)
return 1;
- if (a->family == AF_INET && b->family == AF_INET6)
+ if (a->metric < b->metric)
return -1;
- if (a->family == AF_INET6 && b->family == AF_INET)
+ if (a->metric > b->metric)
return 1;
if (a->ifindex < b->ifindex)
@@ -105,7 +110,7 @@ int local_addresses(sd_rtnl *context, int ifindex, struct local_address **ret) {
if (flags & IFA_F_DEPRECATED)
continue;
- if (!GREEDY_REALLOC(list, n_allocated, n_list+1))
+ if (!GREEDY_REALLOC0(list, n_allocated, n_list+1))
return -ENOMEM;
a = list + n_list;
@@ -150,7 +155,111 @@ int local_addresses(sd_rtnl *context, int ifindex, struct local_address **ret) {
n_list++;
};
- if (n_list)
+ if (n_list > 0)
+ qsort(list, n_list, sizeof(struct local_address), address_compare);
+
+ *ret = list;
+ list = NULL;
+
+ return (int) n_list;
+}
+
+int local_gateways(sd_rtnl *context, int ifindex, struct local_address **ret) {
+ _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL;
+ _cleanup_rtnl_unref_ sd_rtnl *rtnl = NULL;
+ _cleanup_free_ struct local_address *list = NULL;
+ sd_rtnl_message *m = NULL;
+ size_t n_list = 0, n_allocated = 0;
+ int r;
+
+ assert(ret);
+
+ if (context)
+ rtnl = sd_rtnl_ref(context);
+ else {
+ r = sd_rtnl_open(&rtnl, 0);
+ if (r < 0)
+ return r;
+ }
+
+ r = sd_rtnl_message_new_route(rtnl, &req, RTM_GETROUTE, AF_UNSPEC, RTPROT_UNSPEC);
+ if (r < 0)
+ return r;
+
+ r = sd_rtnl_message_request_dump(req, true);
+ if (r < 0)
+ return r;
+
+ r = sd_rtnl_call(rtnl, req, 0, &reply);
+ if (r < 0)
+ return r;
+
+ for (m = reply; m; m = sd_rtnl_message_next(m)) {
+ struct local_address *a;
+ uint16_t type;
+ unsigned char dst_len;
+ uint32_t ifi;
+
+ r = sd_rtnl_message_get_errno(m);
+ if (r < 0)
+ return r;
+
+ r = sd_rtnl_message_get_type(m, &type);
+ if (r < 0)
+ return r;
+
+ if (type != RTM_NEWROUTE)
+ continue;
+
+ r = sd_rtnl_message_route_get_dst_len(m, &dst_len);
+ if (r < 0)
+ return r;
+
+ /* We only care for default routes */
+ if (dst_len != 0)
+ continue;
+
+ r = sd_rtnl_message_read_u32(m, RTA_OIF, &ifi);
+ if (r < 0)
+ return r;
+
+ if (ifindex > 0 && (int) ifi != ifindex)
+ continue;
+
+ if (!GREEDY_REALLOC0(list, n_allocated, n_list + 1))
+ return -ENOMEM;
+
+ a = list + n_list;
+
+ r = sd_rtnl_message_route_get_family(m, &a->family);
+ if (r < 0)
+ return r;
+
+ switch (a->family) {
+ case AF_INET:
+ r = sd_rtnl_message_read_in_addr(m, RTA_GATEWAY, &a->address.in);
+ if (r < 0)
+ continue;
+
+ break;
+ case AF_INET6:
+ r = sd_rtnl_message_read_in6_addr(m, RTA_GATEWAY, &a->address.in6);
+ if (r < 0)
+ continue;
+
+ break;
+ default:
+ continue;
+ }
+
+ sd_rtnl_message_read_u32(m, RTA_PRIORITY, &a->metric);
+
+ a->ifindex = ifi;
+ n_list++;
+
+ }
+
+ if (n_list > 0)
qsort(list, n_list, sizeof(struct local_address), address_compare);
*ret = list;
diff --git a/src/libsystemd/sd-rtnl/local-addresses.h b/src/libsystemd/sd-rtnl/local-addresses.h
index b1ed6341f6..2a9b2f42b7 100644
--- a/src/libsystemd/sd-rtnl/local-addresses.h
+++ b/src/libsystemd/sd-rtnl/local-addresses.h
@@ -32,7 +32,10 @@
struct local_address {
int family, ifindex;
unsigned char scope;
+ uint32_t metric;
union in_addr_union address;
};
int local_addresses(sd_rtnl *rtnl, int ifindex, struct local_address **ret);
+
+int local_gateways(sd_rtnl *rtnl, int ifindex, struct local_address **ret);
diff --git a/src/libsystemd/sd-rtnl/rtnl-message.c b/src/libsystemd/sd-rtnl/rtnl-message.c
index 7ec6143da6..076c822e6f 100644
--- a/src/libsystemd/sd-rtnl/rtnl-message.c
+++ b/src/libsystemd/sd-rtnl/rtnl-message.c
@@ -143,6 +143,21 @@ int sd_rtnl_message_route_get_family(sd_rtnl_message *m, int *family) {
return 0;
}
+int sd_rtnl_message_route_get_dst_len(sd_rtnl_message *m, unsigned char *dst_len) {
+ struct rtmsg *rtm;
+
+ assert_return(m, -EINVAL);
+ assert_return(m->hdr, -EINVAL);
+ assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
+ assert_return(dst_len, -EINVAL);
+
+ rtm = NLMSG_DATA(m->hdr);
+
+ *dst_len = rtm->rtm_dst_len;
+
+ return 0;
+}
+
int sd_rtnl_message_new_route(sd_rtnl *rtnl, sd_rtnl_message **ret,
uint16_t nlmsg_type, int rtm_family,
unsigned char rtm_protocol) {
diff --git a/src/libsystemd/sd-rtnl/test-local-addresses.c b/src/libsystemd/sd-rtnl/test-local-addresses.c
new file mode 100644
index 0000000000..4cf2c08312
--- /dev/null
+++ b/src/libsystemd/sd-rtnl/test-local-addresses.c
@@ -0,0 +1,58 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2014 Lennart Poettering
+
+ systemd 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.
+
+ systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "in-addr-util.h"
+#include "local-addresses.h"
+#include "af-list.h"
+
+static void print_local_addresses(struct local_address *a, unsigned n) {
+ unsigned i;
+
+ for (i = 0; i < n; i++) {
+ _cleanup_free_ char *b = NULL;
+
+ assert_se(in_addr_to_string(a[i].family, &a[i].address, &b) >= 0);
+ printf("%s if%i scope=%i metric=%u address=%s\n", af_to_name(a[i].family), a[i].ifindex, a[i].scope, a[i].metric, b);
+ }
+}
+
+int main(int argc, char *argv[]) {
+ struct local_address *a;
+ int n;
+
+ a = NULL;
+ n = local_addresses(NULL, 0, &a);
+ assert_se(n >= 0);
+
+ printf("Local Addresses:\n");
+ print_local_addresses(a, (unsigned) n);
+ free(a);
+
+ a = NULL;
+ n = local_gateways(NULL, 0, &a);
+ assert_se(n >= 0);
+
+ printf("Local Gateways:\n");
+ print_local_addresses(a, (unsigned) n);
+ free(a);
+
+ return 0;
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-13 14:26:35 +0000