2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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29 #include <sys/param.h>
30 #include <sys/ioctl.h>
33 #include <netinet/ip_carp.h>
34 #include <netinet/ip_carp_nl.h>
36 #include <netlink/netlink.h>
37 #include <netlink/netlink_generic.h>
38 #include <netlink/netlink_snl.h>
39 #include <netlink/netlink_snl_generic.h>
40 #include <netlink/netlink_snl_route.h>
45 #include "libifconfig.h"
46 #include "libifconfig_internal.h"
50 #define _OUT(_field) offsetof(struct ifconfig_carp, _field)
51 static struct snl_attr_parser ap_carp_get[] = {
52 { .type = CARP_NL_VHID, .off = _OUT(carpr_vhid), .cb = snl_attr_get_uint32 },
53 { .type = CARP_NL_STATE, .off = _OUT(carpr_state), .cb = snl_attr_get_uint32 },
54 { .type = CARP_NL_ADVBASE, .off = _OUT(carpr_advbase), .cb = snl_attr_get_int32 },
55 { .type = CARP_NL_ADVSKEW, .off = _OUT(carpr_advskew), .cb = snl_attr_get_int32 },
56 { .type = CARP_NL_KEY, .off = _OUT(carpr_key), .cb = snl_attr_copy_string, .arg_u32 = CARP_KEY_LEN },
57 { .type = CARP_NL_ADDR, .off = _OUT(carpr_addr), .cb = snl_attr_get_in_addr },
58 { .type = CARP_NL_ADDR6, .off = _OUT(carpr_addr6), .cb = snl_attr_get_in6_addr },
62 SNL_DECLARE_GENL_PARSER(carp_get_parser, ap_carp_get);
65 _ifconfig_carp_get(ifconfig_handle_t *h, const char *name,
66 struct ifconfig_carp *carp, size_t ncarp, uint32_t vhid)
68 struct snl_state ss = {};
69 struct snl_errmsg_data e = {};
76 ifconfig_error_clear(h);
78 bzero(carp, sizeof(*carp) * ncarp);
80 if (! snl_init(&ss, NETLINK_GENERIC)) {
81 ifconfig_error(h, NETLINK, ENOTSUP);
85 snl_init_writer(&ss, &nw);
87 family_id = snl_get_genl_family(&ss, CARP_NL_FAMILY_NAME);
89 ifconfig_error(h, NETLINK, EPROTONOSUPPORT);
93 hdr = snl_create_genl_msg_request(&nw, family_id, CARP_NL_CMD_GET);
94 hdr->nlmsg_flags |= NLM_F_DUMP;
96 snl_add_msg_attr_string(&nw, CARP_NL_IFNAME, name);
99 snl_add_msg_attr_u32(&nw, CARP_NL_VHID, vhid);
101 hdr = snl_finalize_msg(&nw);
103 ifconfig_error(h, NETLINK, ENOMEM);
106 seq_id = hdr->nlmsg_seq;
107 if (! snl_send_message(&ss, hdr)) {
108 ifconfig_error(h, NETLINK, EIO);
112 while ((hdr = snl_read_reply_multi(&ss, seq_id, &e)) != NULL) {
114 ifconfig_error(h, NETLINK, e.error);
119 ifconfig_error(h, NETLINK, E2BIG);
123 memset(&carp[i], 0, sizeof(carp[0]));
124 if (! snl_parse_nlmsg(&ss, hdr, &carp_get_parser, &carp[i]))
128 carp[0].carpr_count = i;
131 ifconfig_error(h, NETLINK, E2BIG);
139 return (h->error.errcode ? -1 : 0);
143 ifconfig_carp_set_info(ifconfig_handle_t *h, const char *name,
144 const struct ifconfig_carp *carpr)
146 struct snl_state ss = {};
147 struct snl_writer nw;
148 struct nlmsghdr *hdr;
152 ifconfig_error_clear(h);
154 if (! snl_init(&ss, NETLINK_GENERIC)) {
155 ifconfig_error(h, NETLINK, ENOTSUP);
159 snl_init_writer(&ss, &nw);
161 family_id = snl_get_genl_family(&ss, CARP_NL_FAMILY_NAME);
162 if (family_id == 0) {
163 ifconfig_error(h, NETLINK, EPROTONOSUPPORT);
166 hdr = snl_create_genl_msg_request(&nw, family_id, CARP_NL_CMD_SET);
168 snl_add_msg_attr_u32(&nw, CARP_NL_VHID, carpr->carpr_vhid);
169 snl_add_msg_attr_u32(&nw, CARP_NL_STATE, carpr->carpr_state);
170 snl_add_msg_attr_s32(&nw, CARP_NL_ADVBASE, carpr->carpr_advbase);
171 snl_add_msg_attr_s32(&nw, CARP_NL_ADVSKEW, carpr->carpr_advskew);
172 snl_add_msg_attr_string(&nw, CARP_NL_IFNAME, name);
173 snl_add_msg_attr(&nw, CARP_NL_ADDR, sizeof(carpr->carpr_addr),
175 snl_add_msg_attr(&nw, CARP_NL_ADDR6, sizeof(carpr->carpr_addr6),
176 &carpr->carpr_addr6);
177 snl_add_msg_attr_string(&nw, CARP_NL_KEY, carpr->carpr_key);
179 hdr = snl_finalize_msg(&nw);
181 ifconfig_error(h, NETLINK, ENOMEM);
185 seq_id = hdr->nlmsg_seq;
186 if (! snl_send_message(&ss, hdr)) {
187 ifconfig_error(h, NETLINK, EIO);
191 struct snl_errmsg_data e = { };
192 if (! snl_read_reply_code(&ss, seq_id, &e))
193 ifconfig_error(h, NETLINK, e.error);
198 return (h->error.errcode ? -1 : 0);
202 ifconfig_carp_get_vhid(ifconfig_handle_t *h, const char *name,
203 struct ifconfig_carp *carp, uint32_t vhid)
205 return (_ifconfig_carp_get(h, name, carp, 1, vhid));
209 ifconfig_carp_get_info(ifconfig_handle_t *h, const char *name,
210 struct ifconfig_carp *carp, size_t ncarp)
212 return (_ifconfig_carp_get(h, name, carp, ncarp, 0));