+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2008-2011 Lennart Poettering
- Copyright 2014 Tom Gundersen
-
- 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 "sd-rtnl.h"
-#include "rtnl-util.h"
-#include "macro.h"
-#include "local-addresses.h"
-
-static int address_compare(const void *_a, const void *_b) {
- const struct local_address *a = _a, *b = _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->metric < b->metric)
- return -1;
- if (a->metric > b->metric)
- return 1;
-
- if (a->ifindex < b->ifindex)
- return -1;
- if (a->ifindex > b->ifindex)
- return 1;
-
- return memcmp(&a->address, &b->address, FAMILY_ADDRESS_SIZE(a->family));
-}
-
-int local_addresses(sd_rtnl *context, int ifindex, int af, 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;
- size_t n_list = 0, n_allocated = 0;
- sd_rtnl_message *m;
- 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_addr(rtnl, &req, RTM_GETADDR, 0, af);
- 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;
- unsigned char flags;
- uint16_t type;
- int ifi, family;
-
- 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_NEWADDR)
- continue;
-
- r = sd_rtnl_message_addr_get_ifindex(m, &ifi);
- if (r < 0)
- return r;
- if (ifindex > 0 && ifi != ifindex)
- continue;
-
- r = sd_rtnl_message_addr_get_family(m, &family);
- if (r < 0)
- return r;
- if (af != AF_UNSPEC && af != family)
- continue;
-
- r = sd_rtnl_message_addr_get_flags(m, &flags);
- if (r < 0)
- return r;
- if (flags & IFA_F_DEPRECATED)
- continue;
-
- if (!GREEDY_REALLOC0(list, n_allocated, n_list+1))
- return -ENOMEM;
-
- a = list + n_list;
-
- r = sd_rtnl_message_addr_get_scope(m, &a->scope);
- if (r < 0)
- return r;
-
- if (ifindex == 0 && (a->scope == RT_SCOPE_HOST || a->scope == RT_SCOPE_NOWHERE))
- continue;
-
- switch (family) {
-
- case AF_INET:
- r = sd_rtnl_message_read_in_addr(m, IFA_LOCAL, &a->address.in);
- if (r < 0) {
- r = sd_rtnl_message_read_in_addr(m, IFA_ADDRESS, &a->address.in);
- if (r < 0)
- continue;
- }
- break;
-
- case AF_INET6:
- r = sd_rtnl_message_read_in6_addr(m, IFA_LOCAL, &a->address.in6);
- if (r < 0) {
- r = sd_rtnl_message_read_in6_addr(m, IFA_ADDRESS, &a->address.in6);
- if (r < 0)
- continue;
- }
- break;
-
- default:
- continue;
- }
-
- a->ifindex = ifi;
- a->family = family;
-
- 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, int af, 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, 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, src_len;
- uint32_t ifi;
- int family;
-
- 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;
-
- /* We only care for default routes */
- r = sd_rtnl_message_route_get_dst_prefixlen(m, &dst_len);
- if (r < 0)
- return r;
- if (dst_len != 0)
- continue;
-
- r = sd_rtnl_message_route_get_src_prefixlen(m, &src_len);
- if (r < 0)
- return r;
- if (src_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;
-
- r = sd_rtnl_message_route_get_family(m, &family);
- if (r < 0)
- return r;
- if (af != AF_UNSPEC && af != family)
- continue;
-
- if (!GREEDY_REALLOC0(list, n_allocated, n_list + 1))
- return -ENOMEM;
-
- a = list + n_list;
-
- switch (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;
- a->family = family;
-
- n_list++;
- }
-
- if (n_list > 0)
- qsort(list, n_list, sizeof(struct local_address), address_compare);
-
- *ret = list;
- list = NULL;
-
- return (int) n_list;
-}
~ianmdlvl / elogind.git / blobdiff