/*
* debug attribute RTA_MULTIPATH
*/
void debug_rta_multipath(int lev, struct rtmsg *rtm, struct rtattr *rta, const char *name)
{
struct rtnexthop *rtnh;
int rtnh_len = RTA_PAYLOAD(rta);
struct rtattr *rtnha[__RTA_MAX];
char ifname[IFNAMSIZ] = "";
char flags_list[MAX_STR_SIZE] = "";
if(debug_rta_len_chk(lev, rta, name, sizeof(*rtnh)))
return;
rec_dbg(lev, "%s(%hu):", name, RTA_ALIGN(rta->rta_len));
for(rtnh = RTA_DATA(rta); RTNH_OK(rtnh, rtnh_len);
rtnh = RTNH_NEXT(rtnh), rtnh_len -= RTNH_ALIGN(rtnh->rtnh_len)) {
conv_rtnh_flags(rtnh->rtnh_flags, flags_list, sizeof(flags_list));
if_indextoname_from_lists(rtnh->rtnh_ifindex, ifname);
rec_dbg(lev, " [ rtnexthop(%d) ]", sizeof(*rtnh));
rec_dbg(lev, " rtnh_len(%d): %hu",
sizeof(rtnh->rtnh_len), rtnh->rtnh_len);
rec_dbg(lev, " rtnh_flags(%d): %d(%s)",
sizeof(rtnh->rtnh_flags), rtnh->rtnh_flags, flags_list);
rec_dbg(lev, " rtnh_hops(%d): %d",
sizeof(rtnh->rtnh_hops), rtnh->rtnh_hops);
rec_dbg(lev, " rtnh_ifindex(%d): %d(%s)",
sizeof(rtnh->rtnh_ifindex), rtnh->rtnh_ifindex, ifname);
parse_rtattr(rtnha, RTA_MAX, RTNH_DATA(rtnh), rtnh->rtnh_len - sizeof(*rtnh));
if(rtnha[RTA_GATEWAY])
debug_rta_af(lev+3, rtnha[RTA_GATEWAY], "RTA_GATEWAY", rtm->rtm_family);
}
}
static void copy_cacheinfo_into_route(struct rta_cacheinfo *ci,
struct rtnl_route *route)
{
struct rtnl_rtcacheinfo nci = {
.rtci_clntref = ci->rta_clntref,
.rtci_last_use = ci->rta_lastuse,
.rtci_expires = ci->rta_expires,
.rtci_error = ci->rta_error,
.rtci_used = ci->rta_used,
.rtci_id = ci->rta_id,
.rtci_ts = ci->rta_ts,
.rtci_tsage = ci->rta_tsage,
};
rtnl_route_set_cacheinfo(route, &nci);
}
static int route_msg_parser(struct nl_cache_ops *ops, struct sockaddr_nl *who,
struct nlmsghdr *nlh, struct nl_parser_param *pp)
{
struct rtmsg *rtm;
struct rtnl_route *route;
struct nlattr *tb[RTA_MAX + 1];
struct nl_addr *src = NULL, *dst = NULL, *addr;
int err;
route = rtnl_route_alloc();
if (!route) {
err = nl_errno(ENOMEM);
goto errout;
}
route->ce_msgtype = nlh->nlmsg_type;
err = nlmsg_parse(nlh, sizeof(struct rtmsg), tb, RTA_MAX,
route_policy);
if (err < 0)
goto errout;
rtm = nlmsg_data(nlh);
rtnl_route_set_family(route, rtm->rtm_family);
rtnl_route_set_tos(route, rtm->rtm_tos);
rtnl_route_set_table(route, rtm->rtm_table);
rtnl_route_set_type(route, rtm->rtm_type);
rtnl_route_set_scope(route, rtm->rtm_scope);
rtnl_route_set_protocol(route, rtm->rtm_protocol);
rtnl_route_set_flags(route, rtm->rtm_flags);
if (tb[RTA_DST]) {
dst = nla_get_addr(tb[RTA_DST], rtm->rtm_family);
if (dst == NULL)
goto errout_errno;
} else {
dst = nl_addr_alloc(0);
nl_addr_set_family(dst, rtm->rtm_family);
}
nl_addr_set_prefixlen(dst, rtm->rtm_dst_len);
err = rtnl_route_set_dst(route, dst);
if (err < 0)
goto errout;
nl_addr_put(dst);
if (tb[RTA_SRC]) {
src = nla_get_addr(tb[RTA_SRC], rtm->rtm_family);
if (src == NULL)
goto errout_errno;
} else if (rtm->rtm_src_len)
src = nl_addr_alloc(0);
if (src) {
nl_addr_set_prefixlen(src, rtm->rtm_src_len);
rtnl_route_set_src(route, src);
nl_addr_put(src);
}
if (tb[RTA_IIF])
rtnl_route_set_iif(route, nla_get_string(tb[RTA_IIF]));
if (tb[RTA_OIF])
rtnl_route_set_oif(route, nla_get_u32(tb[RTA_OIF]));
if (tb[RTA_GATEWAY]) {
addr = nla_get_addr(tb[RTA_GATEWAY], route->rt_family);
if (addr == NULL)
goto errout_errno;
rtnl_route_set_gateway(route, addr);
nl_addr_put(addr);
}
if (tb[RTA_PRIORITY])
rtnl_route_set_prio(route, nla_get_u32(tb[RTA_PRIORITY]));
if (tb[RTA_PREFSRC]) {
addr = nla_get_addr(tb[RTA_PREFSRC], route->rt_family);
if (addr == NULL)
goto errout_errno;
rtnl_route_set_pref_src(route, addr);
nl_addr_put(addr);
}
if (tb[RTA_METRICS]) {
struct nlattr *mtb[RTAX_MAX + 1];
int i;
err = nla_parse_nested(mtb, RTAX_MAX, tb[RTA_METRICS], NULL);
if (err < 0)
goto errout;
for (i = 1; i <= RTAX_MAX; i++) {
if (mtb[i] && nla_len(mtb[i]) >= sizeof(uint32_t)) {
uint32_t m = nla_get_u32(mtb[i]);
if (rtnl_route_set_metric(route, i, m) < 0)
goto errout_errno;
}
}
}
if (tb[RTA_MULTIPATH]) {
struct rtnl_nexthop *nh;
struct rtnexthop *rtnh = nla_data(tb[RTA_MULTIPATH]);
size_t tlen = nla_len(tb[RTA_MULTIPATH]);
while (tlen >= sizeof(*rtnh) && tlen >= rtnh->rtnh_len) {
nh = rtnl_route_nh_alloc();
if (!nh)
goto errout;
rtnl_route_nh_set_weight(nh, rtnh->rtnh_hops);
rtnl_route_nh_set_ifindex(nh, rtnh->rtnh_ifindex);
rtnl_route_nh_set_flags(nh, rtnh->rtnh_flags);
if (rtnh->rtnh_len > sizeof(*rtnh)) {
struct nlattr *ntb[RTA_MAX + 1];
nla_parse(ntb, RTA_MAX, (struct nlattr *)
RTNH_DATA(rtnh),
rtnh->rtnh_len - sizeof(*rtnh),
route_policy);
if (ntb[RTA_GATEWAY]) {
nh->rtnh_gateway = nla_get_addr(
ntb[RTA_GATEWAY],
route->rt_family);
nh->rtnh_mask = NEXTHOP_HAS_GATEWAY;
}
}
rtnl_route_add_nexthop(route, nh);
tlen -= RTNH_ALIGN(rtnh->rtnh_len);
rtnh = RTNH_NEXT(rtnh);
}
}
if (tb[RTA_FLOW])
rtnl_route_set_realms(route, nla_get_u32(tb[RTA_FLOW]));
if (tb[RTA_CACHEINFO])
copy_cacheinfo_into_route(nla_data(tb[RTA_CACHEINFO]), route);
if (tb[RTA_MP_ALGO])
rtnl_route_set_mp_algo(route, nla_get_u32(tb[RTA_MP_ALGO]));
err = pp->pp_cb((struct nl_object *) route, pp);
if (err < 0)
goto errout;
err = P_ACCEPT;
errout:
rtnl_route_put(route);
return err;
errout_errno:
err = nl_get_errno();
goto errout;
}
static int route_request_update(struct nl_cache *c, struct nl_handle *h)
{
return nl_rtgen_request(h, RTM_GETROUTE, AF_UNSPEC, NLM_F_DUMP);
}
/**
* @name Cache Management
* @{
*/
/**
* Build a route cache holding all routes currently configured in the kernel
* @arg handle netlink handle
*
* Allocates a new cache, initializes it properly and updates it to
* contain all routes currently configured in the kernel.
*
* @note The caller is responsible for destroying and freeing the
* cache after using it.
* @return The cache or NULL if an error has occured.
*/
struct nl_cache *rtnl_route_alloc_cache(struct nl_handle *handle)
{
struct nl_cache *cache;
cache = nl_cache_alloc(&rtnl_route_ops);
if (!cache)
return NULL;
if (handle && nl_cache_refill(handle, cache) < 0) {
free(cache);
return NULL;
}
return cache;
}
/** @} */
/**
* @name Route Addition
* @{
*/
static struct nl_msg *build_route_msg(struct rtnl_route *tmpl, int cmd,
int flags)
{
struct nl_msg *msg;
struct nl_addr *addr;
int scope, i, oif, nmetrics = 0;
struct nlattr *metrics;
struct rtmsg rtmsg = {
.rtm_family = rtnl_route_get_family(tmpl),
.rtm_dst_len = rtnl_route_get_dst_len(tmpl),
.rtm_src_len = rtnl_route_get_src_len(tmpl),
.rtm_tos = rtnl_route_get_tos(tmpl),
.rtm_table = rtnl_route_get_table(tmpl),
.rtm_type = rtnl_route_get_type(tmpl),
.rtm_protocol = rtnl_route_get_protocol(tmpl),
.rtm_flags = rtnl_route_get_flags(tmpl),
};
if (rtmsg.rtm_family == AF_UNSPEC) {
nl_error(EINVAL, "Cannot build route message, address " \
"family is unknown.");
return NULL;
}
scope = rtnl_route_get_scope(tmpl);
if (scope == RT_SCOPE_NOWHERE) {
if (rtmsg.rtm_type == RTN_LOCAL)
scope = RT_SCOPE_HOST;
else {
/* XXX Change to UNIVERSE if gw || nexthops */
scope = RT_SCOPE_LINK;
}
}
rtmsg.rtm_scope = scope;
msg = nlmsg_alloc_simple(cmd, flags);
if (msg == NULL)
return NULL;
if (nlmsg_append(msg, &rtmsg, sizeof(rtmsg), NLMSG_ALIGNTO) < 0)
goto nla_put_failure;
addr = rtnl_route_get_dst(tmpl);
if (addr)
NLA_PUT_ADDR(msg, RTA_DST, addr);
addr = rtnl_route_get_src(tmpl);
if (addr)
NLA_PUT_ADDR(msg, RTA_SRC, addr);
addr = rtnl_route_get_gateway(tmpl);
if (addr)
NLA_PUT_ADDR(msg, RTA_GATEWAY, addr);
addr = rtnl_route_get_pref_src(tmpl);
if (addr)
NLA_PUT_ADDR(msg, RTA_PREFSRC, addr);
NLA_PUT_U32(msg, RTA_PRIORITY, rtnl_route_get_prio(tmpl));
oif = rtnl_route_get_oif(tmpl);
if (oif != RTNL_LINK_NOT_FOUND)
NLA_PUT_U32(msg, RTA_OIF, oif);
for (i = 1; i <= RTAX_MAX; i++)
if (rtnl_route_get_metric(tmpl, i) != UINT_MAX)
nmetrics++;
if (nmetrics > 0) {
unsigned int val;
metrics = nla_nest_start(msg, RTA_METRICS);
if (metrics == NULL)
goto nla_put_failure;
for (i = 1; i <= RTAX_MAX; i++) {
val = rtnl_route_get_metric(tmpl, i);
if (val != UINT_MAX)
NLA_PUT_U32(msg, i, val);
}
nla_nest_end(msg, metrics);
}
#if 0
RTA_IIF,
RTA_MULTIPATH,
RTA_PROTOINFO,
RTA_FLOW,
RTA_CACHEINFO,
RTA_SESSION,
RTA_MP_ALGO,
#endif
return msg;
nla_put_failure:
nlmsg_free(msg);
return NULL;
}
struct nl_msg *rtnl_route_build_add_request(struct rtnl_route *tmpl, int flags)
{
return build_route_msg(tmpl, RTM_NEWROUTE, NLM_F_CREATE | flags);
}
int rtnl_route_add(struct nl_handle *handle, struct rtnl_route *route,
int flags)
{
struct nl_msg *msg;
int err;
msg = rtnl_route_build_add_request(route, flags);
if (!msg)
return nl_get_errno();
err = nl_send_auto_complete(handle, msg);
nlmsg_free(msg);
if (err < 0)
return err;
return nl_wait_for_ack(handle);
}
struct nl_msg *rtnl_route_build_del_request(struct rtnl_route *tmpl, int flags)
{
return build_route_msg(tmpl, RTM_DELROUTE, flags);
}
int rtnl_route_del(struct nl_handle *handle, struct rtnl_route *route,
int flags)
{
struct nl_msg *msg;
int err;
msg = rtnl_route_build_del_request(route, flags);
if (!msg)
return nl_get_errno();
err = nl_send_auto_complete(handle, msg);
nlmsg_free(msg);
if (err < 0)
return err;
return nl_wait_for_ack(handle);
}
/** @} */
static struct nl_af_group route_groups[] = {
{ AF_INET, RTNLGRP_IPV4_ROUTE },
{ AF_INET6, RTNLGRP_IPV6_ROUTE },
{ AF_DECnet, RTNLGRP_DECnet_ROUTE },
{ END_OF_GROUP_LIST },
};
static struct nl_cache_ops rtnl_route_ops = {
.co_name = "route/route",
.co_hdrsize = sizeof(struct rtmsg),
.co_msgtypes = {
{ RTM_NEWROUTE, NL_ACT_NEW, "new" },
{ RTM_DELROUTE, NL_ACT_DEL, "del" },
{ RTM_GETROUTE, NL_ACT_GET, "get" },
END_OF_MSGTYPES_LIST,
},
.co_protocol = NETLINK_ROUTE,
.co_groups = route_groups,
.co_request_update = route_request_update,
.co_msg_parser = route_msg_parser,
.co_obj_ops = &route_obj_ops,
};
static void __init route_init(void)
{
nl_cache_mngt_register(&rtnl_route_ops);
}
static void __exit route_exit(void)
{
nl_cache_mngt_unregister(&rtnl_route_ops);
}
static int route_msg_parser(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
{
struct nl_parser_param *pp = arg;
struct rtnl_route route = RTNL_INIT_ROUTE();
struct rtattr *tb[RTA_MAX + 1];
struct rtmsg *r = NLMSG_DATA(n);
size_t len;
int err;
if (n->nlmsg_type != RTM_NEWROUTE)
return P_IGNORE;
len = n->nlmsg_len - NLMSG_LENGTH(sizeof(*r));
if (len < 0)
return nl_error(EINVAL, "netlink message too short to be a " \
"routing message");
err = nl_parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
if (err < 0)
return err;
route.rt_family = r->rtm_family;
route.rt_dst_len = r->rtm_dst_len;
route.rt_src_len = r->rtm_src_len;
route.rt_tos = r->rtm_tos;
route.rt_table = r->rtm_table;
route.rt_protocol = r->rtm_protocol;
route.rt_scope = r->rtm_scope;
route.rt_type = r->rtm_type;
route.rt_flags = r->rtm_flags;
route.rt_mask = (ROUTE_HAS_FAMILY|ROUTE_HAS_DST_LEN|ROUTE_HAS_SRC_LEN|
ROUTE_HAS_TOS|ROUTE_HAS_TABLE|ROUTE_HAS_PROTOCOL|ROUTE_HAS_SCOPE|
ROUTE_HAS_TYPE|ROUTE_HAS_FLAGS);
if (tb[RTA_DST]) {
nl_copy_addr(&route.rt_dst, tb[RTA_DST]);
route.rt_dst.a_prefix = route.rt_dst_len;
route.rt_dst.a_family = route.rt_family;
route.rt_mask |= ROUTE_HAS_DST;
}
if (tb[RTA_SRC]) {
nl_copy_addr(&route.rt_src, tb[RTA_SRC]);
route.rt_src.a_prefix = route.rt_src_len;
route.rt_src.a_family = route.rt_family;
route.rt_mask |= ROUTE_HAS_SRC;
}
if (tb[RTA_IIF]) {
err = NL_COPY_DATA(route.rt_iif, tb[RTA_IIF]);
if (err < 0)
return err;
route.rt_mask |= ROUTE_HAS_IIF;
}
if (tb[RTA_OIF]) {
err = NL_COPY_DATA(route.rt_oif, tb[RTA_OIF]);
if (err < 0)
return err;
route.rt_mask |= ROUTE_HAS_OIF;
}
if (tb[RTA_GATEWAY]) {
nl_copy_addr(&route.rt_gateway, tb[RTA_GATEWAY]);
route.rt_gateway.a_family = route.rt_family;
route.rt_mask |= ROUTE_HAS_GATEWAY;
}
if (tb[RTA_PRIORITY]) {
err = NL_COPY_DATA(route.rt_prio, tb[RTA_PRIORITY]);
if (err < 0)
return err;
route.rt_mask |= ROUTE_HAS_PRIO;
}
if (tb[RTA_PREFSRC]) {
nl_copy_addr(&route.rt_pref_src, tb[RTA_PREFSRC]);
route.rt_pref_src.a_family = route.rt_family;
route.rt_mask |= ROUTE_HAS_PREF_SRC;
}
if (tb[RTA_METRICS]) {
int i;
struct rtattr *mtb[RTAX_MAX + 1];
err = nl_parse_nested(mtb, RTAX_MAX, tb[RTA_METRICS]);
if (err < 0)
return err;
for (i = 1; i <= RTAX_MAX; i++) {
if (mtb[i]) {
uint32_t m = *(uint32_t *) RTA_DATA(mtb[i]);
route.rt_metrics[i] = m;
route.rt_metrics_mask |= (1<<(i-1));
}
}
route.rt_mask |= ROUTE_HAS_METRICS;
}
if (tb[RTA_MULTIPATH]) {
struct rtnl_nexthop *nh;
struct rtnexthop *rtnh = RTA_DATA(tb[RTA_MULTIPATH]);
size_t tlen = RTA_PAYLOAD(tb[RTA_MULTIPATH]);
for (;;) {
if (tlen < sizeof(*rtnh) || tlen < rtnh->rtnh_len)
break;
nh = calloc(1, sizeof(*nh));
if (nh == NULL) {
err = -ENOMEM;
goto err_out;
}
nh->rtnh_flags = rtnh->rtnh_flags;
nh->rtnh_hops = rtnh->rtnh_hops;
nh->rtnh_ifindex = rtnh->rtnh_ifindex;
nh->rtnh_mask = (NEXTHOP_HAS_FLAGS | NEXTHOP_HAS_HOPS
| NEXTHOP_HAS_IFINDEX);
if (rtnh->rtnh_len > sizeof(*rtnh)) {
struct rtattr *ntb[RTA_MAX + 1];
nl_parse_rtattr(ntb, RTA_MAX, RTNH_DATA(rtnh),
rtnh->rtnh_len - sizeof(*rtnh));
if (ntb[RTA_GATEWAY]) {
nl_copy_addr(&nh->rtnh_gateway, ntb[RTA_GATEWAY]);
nh->rtnh_gateway.a_family = route.rt_family;
nh->rtnh_mask = NEXTHOP_HAS_GATEWAY;
}
}
nh->rtnh_next = route.rt_nexthops;
route.rt_nexthops = nh;
len -= RTNH_ALIGN(rtnh->rtnh_len);
rtnh = RTNH_NEXT(rtnh);
}
route.rt_mask |= ROUTE_HAS_MULTIPATH;
}
/* Not sure if there are any users not using this for fwmark,
* allocating for now */
if (tb[RTA_PROTOINFO]) {
err = nl_alloc_data_from_rtattr(&route.rt_protoinfo, tb[RTA_PROTOINFO]);
if (err < 0)
goto err_out;
route.rt_mask |= ROUTE_HAS_PROTOINFO;
}
if (tb[RTA_FLOW]) {
err = NL_COPY_DATA(route.rt_realm, tb[RTA_FLOW]);
if (err < 0)
goto err_out;
route.rt_mask |= ROUTE_HAS_REALM;
}
if (tb[RTA_CACHEINFO]) {
struct rta_cacheinfo *ci;
if (RTA_PAYLOAD(tb[RTA_CACHEINFO]) < sizeof(struct rta_cacheinfo))
return nl_error(EINVAL, "routing cacheinfo TLV is too short");
ci = (struct rta_cacheinfo *) RTA_DATA(tb[RTA_CACHEINFO]);
route.rt_cacheinfo.rtci_clntref = ci->rta_clntref;
route.rt_cacheinfo.rtci_last_use = ci->rta_lastuse;
route.rt_cacheinfo.rtci_expires = ci->rta_expires;
route.rt_cacheinfo.rtci_error = ci->rta_error;
route.rt_cacheinfo.rtci_used = ci->rta_used;
route.rt_cacheinfo.rtci_id = ci->rta_id;
route.rt_cacheinfo.rtci_ts = ci->rta_ts;
route.rt_cacheinfo.rtci_tsage = ci->rta_tsage;
route.rt_mask |= ROUTE_HAS_CACHEINFO;
}
if (tb[RTA_SESSION]) {
err = nl_alloc_data_from_rtattr(&route.rt_session, tb[RTA_SESSION]);
if (err < 0)
goto err_out;
route.rt_mask |= ROUTE_HAS_SESSION;
}
err = pp->pp_cb((struct nl_common *) &route, pp);
if (err < 0)
goto err_out;
return P_ACCEPT;
err_out:
route_free_data((struct nl_common *) &route);
return err;
}
/*
* parse route message
*/
int parse_rtmsg(struct nlmsghdr *nlh)
{
struct rtmsg *rtm;
int rtm_len;
struct rtattr *rta[__RTA_MAX];
char ipv[MAX_STR_SIZE] = "";
char msg[MAX_MSG_SIZE] = "";
char *mp = msg;
int log_opts = get_log_opts();
int res;
/* debug nlmsghdr */
if(log_opts & L_DEBUG)
debug_nlmsg(0, nlh);
/* get rtmsg */
rtm_len = NLMSG_PAYLOAD(nlh, 0);
if(rtm_len < sizeof(*rtm)) {
rec_log("error: %s: rtmsg: length too short", __func__);
return(1);
}
rtm = (struct rtmsg *)NLMSG_DATA(nlh);
/* parse route attributes */
parse_rtattr(rta, RTA_MAX, RTM_RTA(rtm), RTM_PAYLOAD(nlh));
/* debug rtmsg */
if(log_opts & L_DEBUG)
debug_rtmsg(0, rtm, rta, rtm_len);
/* check address family */
char dst[INET6_ADDRSTRLEN] = "";
if(rtm->rtm_family == AF_INET) {
strcpy(ipv, "ipv4");
strcpy(dst, "0.0.0.0");
} else if(rtm->rtm_family == AF_INET6) {
strcpy(ipv, "ipv6");
strcpy(dst, "::");
} else {
rec_log("error: %s: unknown address family: %d",
__func__, rtm->rtm_family);
return(1);
}
/* convert from table id to table name */
char table[MAX_STR_SIZE] = "";
snprintf(table, sizeof(table), "%s", conv_rt_table(rtm->rtm_table, 0));
if(!strncmp(table, "unknown", sizeof(table)))
snprintf(table, sizeof(table), "%d", rtm->rtm_table);
/* check route table id(other than RT_TABLE_LOCAL) */
if(rtm->rtm_table == RT_TABLE_LOCAL)
return(1);
/* check route protocol(other than RTPROT_UNSPEC) */
if(rtm->rtm_protocol == RTPROT_UNSPEC)
return(1);
/* check route flags(other then RTM_F_CLONED) */
if(rtm->rtm_flags & RTM_F_CLONED)
return(1);
/* get destination prefix */
if(rta[RTA_DST]) {
res = inet_ntop_ifa(rtm->rtm_family, rta[RTA_DST], dst, sizeof(dst));
if(res) {
rec_log("error: %s: RTA_DST: %s", __func__,
(res == 1) ? strerror(errno) : "payload too short");
return(1);
}
}
/* no RTA_DST attribute if destination is a default gateway */
mp = add_log(msg, mp, "destination=%s/%d ", dst, rtm->rtm_dst_len);
/* get source prefix */
if(rta[RTA_SRC]) {
char src[INET6_ADDRSTRLEN] = "";
res = inet_ntop_ifa(rtm->rtm_family, rta[RTA_SRC], src, sizeof(src));
if(res == 1) {
rec_log("error: %s: RTA_SRC: %s", __func__,
(res == 1) ? strerror(errno) : "payload too short");
return(1);
}
mp = add_log(msg, mp, "source=%s/%d ", src, rtm->rtm_src_len);
}
/* get preferred source address */
if(rta[RTA_PREFSRC]) {
char prefsrc[INET6_ADDRSTRLEN] = "";
res = inet_ntop_ifa(rtm->rtm_family, rta[RTA_PREFSRC], prefsrc, sizeof(prefsrc));
if(res) {
rec_log("error: %s: RTA_PREFSRC: %s", __func__,
(res == 1) ? strerror(errno) : "payload too short");
return(1);
}
mp = add_log(msg, mp, "preferred-source=%s ", prefsrc);
}
/* get tos */
if(rtm->rtm_tos)
mp = add_log(msg, mp, "tos=0x%.2x ", rtm->rtm_tos);
/* get ingress interface */
if(rta[RTA_IIF]) {
unsigned iifindex;
char iifname[IFNAMSIZ] = "";
if(RTA_PAYLOAD(rta[RTA_IIF]) < sizeof(iifindex)) {
rec_log("error: %s: RTA_IIF: payload too short", __func__);
return(1);
}
iifindex = *((unsigned *)RTA_DATA(rta[RTA_IIF]));
if_indextoname_from_lists(iifindex, iifname);
mp = add_log(msg, mp, "in=%s ", iifname);
}
/* get gateway address */
if(rta[RTA_GATEWAY]) {
char nexthop[INET6_ADDRSTRLEN] = "";
res = inet_ntop_ifa(rtm->rtm_family, rta[RTA_GATEWAY], nexthop, sizeof(nexthop));
if(res) {
rec_log("error: %s: RTA_GATEWAY: %s", __func__,
(res == 1) ? strerror(errno) : "payload too short");
return(1);
}
mp = add_log(msg, mp, "nexthop=%s ", nexthop);
}
/* get egress interface */
if(rta[RTA_OIF]) {
unsigned oifindex;
char oifname[IFNAMSIZ] = "";
if(RTA_PAYLOAD(rta[RTA_OIF]) < sizeof(oifindex)) {
rec_log("error: %s: RTA_OIF: payload too short", __func__);
return(1);
}
oifindex = *((unsigned *)RTA_DATA(rta[RTA_OIF]));
if_indextoname_from_lists(oifindex, oifname);
mp = add_log(msg, mp, "interface=%s ", oifname);
}
/* get priority(but metric) */
char metric[MAX_STR_SIZE] = "";
if(rta[RTA_PRIORITY]) {
if(RTA_PAYLOAD(rta[RTA_PRIORITY]) < sizeof(int)) {
rec_log("error: %s: RTA_PRIORITY: payload too short", __func__);
return(1);
}
snprintf(metric, sizeof(metric), "metric=%d ", *((int *)RTA_DATA(rta[RTA_PRIORITY])));
}
/* convert route message type */
char type[MAX_STR_SIZE] = "";
snprintf(type, sizeof(type), "%s", conv_rtn_type(rtm->rtm_type, 0));
/* convert route message protocol */
char proto[MAX_STR_SIZE] = "";
snprintf(proto, sizeof(proto), "%s", conv_rtprot(rtm->rtm_protocol, 0));
/* get table id & name */
if(rta[RTA_TABLE]) {
int table_id = *(int *)RTA_DATA(rta[RTA_TABLE]);
if(RTA_PAYLOAD(rta[RTA_TABLE]) < sizeof(int)) {
rec_log("error: %s: RTA_TABLE: payload too short", __func__);
return(1);
}
snprintf(table, sizeof(table), "%s", conv_rt_table(table_id, 0));
if(!strncmp(table, "unknown", sizeof(table)))
snprintf(table, sizeof(table), "%d", table_id);
}
/* get multipath */
if(rta[RTA_MULTIPATH]) {
struct rtnexthop *rtnh;
int rtnh_len = RTA_PAYLOAD(rta[RTA_MULTIPATH]);
struct rtattr *rtna[__RTA_MAX];
char rtnh_ifname[IFNAMSIZ] = "";
char rtnh_nexthop[INET6_ADDRSTRLEN] = "";
if(RTA_PAYLOAD(rta[RTA_MULTIPATH]) < sizeof(*rtnh)) {
rec_log("error: %s: RTA_MULTIPATH: payload too short", __func__);
return(1);
}
rtnh = RTA_DATA(rta[RTA_MULTIPATH]);
for(; RTNH_OK(rtnh, rtnh_len);
rtnh = RTNH_NEXT(rtnh), rtnh_len -= RTNH_ALIGN(rtnh->rtnh_len)) {
parse_rtattr(rtna, RTA_MAX, RTNH_DATA(rtnh), rtnh->rtnh_len - sizeof(*rtnh));
if(rtna[RTA_GATEWAY]) {
res = inet_ntop_ifa(rtm->rtm_family, rtna[RTA_GATEWAY],
rtnh_nexthop, sizeof(rtnh_nexthop));
if(res) {
rec_log("error: %s: RTA_GATEWAY: %s", __func__,
(res == 1) ? strerror(errno) : "payload too short");
return(1);
}
}
/* get interface name & logging routing table message */
if_indextoname_from_lists(rtnh->rtnh_ifindex, rtnh_ifname);
if(nlh->nlmsg_type == RTM_NEWROUTE)
rec_log("%s route added: %snexthop=%s interface=%s "
"%sweight=%d type=%s protocol=%s table=%s",
ipv, msg, rtnh_nexthop, rtnh_ifname,
metric, rtnh->rtnh_hops+1, type, proto, table);
else if(nlh->nlmsg_type == RTM_DELROUTE)
rec_log("%s route deleted: %snexthop=%s interface=%s "
"%sweight=%d type=%s protocol=%s table=%s",
ipv, msg, rtnh_nexthop, rtnh_ifname,
metric, rtnh->rtnh_hops+1, type, proto, table);
}
return(0);
}
/* logging routing message */
if(nlh->nlmsg_type == RTM_NEWROUTE)
rec_log("%s route added: %s%stype=%s protocol=%s table=%s",
ipv, msg, metric, type, proto, table);
else if(nlh->nlmsg_type == RTM_DELROUTE)
rec_log("%s route deleted: %s%stype=%s proto=%s table=%s",
ipv, msg, metric, type, proto, table);
return(0);
}
