int sd_rtnl_message_new_route(sd_netlink *rtnl, sd_netlink_message **ret,
uint16_t nlmsg_type, int rtm_family,
unsigned char rtm_protocol) {
struct rtmsg *rtm;
int r;
assert_return(rtnl_message_type_is_route(nlmsg_type), -EINVAL);
assert_return((nlmsg_type == RTM_GETROUTE && rtm_family == AF_UNSPEC) ||
rtm_family == AF_INET || rtm_family == AF_INET6, -EINVAL);
assert_return(ret, -EINVAL);
r = message_new(rtnl, ret, nlmsg_type);
if (r < 0)
return r;
if (nlmsg_type == RTM_NEWROUTE)
(*ret)->hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_APPEND;
rtm = NLMSG_DATA((*ret)->hdr);
rtm->rtm_family = rtm_family;
rtm->rtm_scope = RT_SCOPE_UNIVERSE;
rtm->rtm_type = RTN_UNICAST;
rtm->rtm_table = RT_TABLE_MAIN;
rtm->rtm_protocol = rtm_protocol;
return 0;
}
int sd_rtnl_message_route_set_scope(sd_netlink_message *m, unsigned char scope) {
struct rtmsg *rtm;
assert_return(m, -EINVAL);
assert_return(m->hdr, -EINVAL);
assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
rtm = NLMSG_DATA(m->hdr);
rtm->rtm_scope = scope;
return 0;
}
int sd_rtnl_message_route_set_flags(sd_netlink_message *m, unsigned flags) {
struct rtmsg *rtm;
assert_return(m, -EINVAL);
assert_return(m->hdr, -EINVAL);
assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
rtm = NLMSG_DATA(m->hdr);
rtm->rtm_flags = flags;
return 0;
}
int sd_rtnl_message_route_set_family(sd_netlink_message *m, int family) {
struct rtmsg *rtm;
assert_return(m, -EINVAL);
assert_return(m->hdr, -EINVAL);
assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
rtm = NLMSG_DATA(m->hdr);
rtm->rtm_family = family;
return 0;
}
int sd_rtnl_message_route_get_src_prefixlen(sd_netlink_message *m, unsigned char *src_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(src_len, -EINVAL);
rtm = NLMSG_DATA(m->hdr);
*src_len = rtm->rtm_src_len;
return 0;
}
int sd_rtnl_message_route_get_table(sd_netlink_message *m, unsigned char *table) {
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(table, -EINVAL);
rtm = NLMSG_DATA(m->hdr);
*table = rtm->rtm_table;
return 0;
}
int sd_rtnl_message_route_get_protocol(sd_netlink_message *m, unsigned char *protocol) {
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(protocol, -EINVAL);
rtm = NLMSG_DATA(m->hdr);
*protocol = rtm->rtm_protocol;
return 0;
}
int sd_rtnl_message_get_family(sd_netlink_message *m, int *family) {
assert_return(m, -EINVAL);
assert_return(family, -EINVAL);
assert(m->hdr);
if (rtnl_message_type_is_link(m->hdr->nlmsg_type)) {
struct ifinfomsg *ifi;
ifi = NLMSG_DATA(m->hdr);
*family = ifi->ifi_family;
return 0;
} else if (rtnl_message_type_is_route(m->hdr->nlmsg_type)) {
struct rtmsg *rtm;
rtm = NLMSG_DATA(m->hdr);
*family = rtm->rtm_family;
return 0;
} else if (rtnl_message_type_is_neigh(m->hdr->nlmsg_type)) {
struct ndmsg *ndm;
ndm = NLMSG_DATA(m->hdr);
*family = ndm->ndm_family;
return 0;
} else if (rtnl_message_type_is_addr(m->hdr->nlmsg_type)) {
struct ifaddrmsg *ifa;
ifa = NLMSG_DATA(m->hdr);
*family = ifa->ifa_family;
return 0;
} else if (rtnl_message_type_is_routing_policy_rule(m->hdr->nlmsg_type)) {
struct rtmsg *rtm;
rtm = NLMSG_DATA(m->hdr);
*family = rtm->rtm_family;
return 0;
}
return -EOPNOTSUPP;
}
int sd_rtnl_message_route_set_src_prefixlen(sd_netlink_message *m, unsigned char prefixlen) {
struct rtmsg *rtm;
assert_return(m, -EINVAL);
assert_return(m->hdr, -EINVAL);
assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
rtm = NLMSG_DATA(m->hdr);
if ((rtm->rtm_family == AF_INET && prefixlen > 32) ||
(rtm->rtm_family == AF_INET6 && prefixlen > 128))
return -ERANGE;
rtm->rtm_src_len = prefixlen;
return 0;
}
