diff options
Diffstat (limited to 'src/libsystemd/sd-netlink/netlink-message-rtnl.c')
| -rw-r--r-- | src/libsystemd/sd-netlink/netlink-message-rtnl.c | 1205 |
1 files changed, 1205 insertions, 0 deletions
diff --git a/src/libsystemd/sd-netlink/netlink-message-rtnl.c b/src/libsystemd/sd-netlink/netlink-message-rtnl.c new file mode 100644 index 0000000..109f3ee --- /dev/null +++ b/src/libsystemd/sd-netlink/netlink-message-rtnl.c @@ -0,0 +1,1205 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include <netinet/in.h> +#include <linux/fib_rules.h> +#include <linux/if_addrlabel.h> +#include <linux/if_bridge.h> +#include <linux/nexthop.h> +#include <stdbool.h> +#include <unistd.h> + +#include "sd-netlink.h" + +#include "format-util.h" +#include "netlink-internal.h" +#include "netlink-types.h" +#include "netlink-util.h" +#include "socket-util.h" +#include "util.h" + +static bool rtnl_message_type_is_neigh(uint16_t type) { + return IN_SET(type, RTM_NEWNEIGH, RTM_GETNEIGH, RTM_DELNEIGH); +} + +static bool rtnl_message_type_is_route(uint16_t type) { + return IN_SET(type, RTM_NEWROUTE, RTM_GETROUTE, RTM_DELROUTE); +} + +static bool rtnl_message_type_is_nexthop(uint16_t type) { + return IN_SET(type, RTM_NEWNEXTHOP, RTM_GETNEXTHOP, RTM_DELNEXTHOP); +} + +static bool rtnl_message_type_is_link(uint16_t type) { + return IN_SET(type, + RTM_NEWLINK, RTM_SETLINK, RTM_GETLINK, RTM_DELLINK, + RTM_NEWLINKPROP, RTM_DELLINKPROP, RTM_GETLINKPROP); +} + +static bool rtnl_message_type_is_addr(uint16_t type) { + return IN_SET(type, RTM_NEWADDR, RTM_GETADDR, RTM_DELADDR); +} + +static bool rtnl_message_type_is_addrlabel(uint16_t type) { + return IN_SET(type, RTM_NEWADDRLABEL, RTM_DELADDRLABEL, RTM_GETADDRLABEL); +} + +static bool rtnl_message_type_is_routing_policy_rule(uint16_t type) { + return IN_SET(type, RTM_NEWRULE, RTM_DELRULE, RTM_GETRULE); +} + +static bool rtnl_message_type_is_traffic_control(uint16_t type) { + return IN_SET(type, + RTM_NEWQDISC, RTM_DELQDISC, RTM_GETQDISC, + RTM_NEWTCLASS, RTM_DELTCLASS, RTM_GETTCLASS); +} + +static bool rtnl_message_type_is_mdb(uint16_t type) { + return IN_SET(type, RTM_NEWMDB, RTM_DELMDB, RTM_GETMDB); +} + +int sd_rtnl_message_route_set_dst_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_dst_len = prefixlen; + + return 0; +} + +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; +} + +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_get_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); + assert_return(flags, -EINVAL); + + rtm = NLMSG_DATA(m->hdr); + + *flags = rtm->rtm_flags; + + return 0; +} + +int sd_rtnl_message_route_set_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); + + rtm = NLMSG_DATA(m->hdr); + + rtm->rtm_table = table; + + return 0; +} + +int sd_rtnl_message_route_get_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); + assert_return(family, -EINVAL); + + rtm = NLMSG_DATA(m->hdr); + + *family = rtm->rtm_family; + + return 0; +} + +int sd_rtnl_message_route_get_type(sd_netlink_message *m, unsigned char *type) { + 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(type, -EINVAL); + + rtm = NLMSG_DATA(m->hdr); + + *type = rtm->rtm_type; + + return 0; +} + +int sd_rtnl_message_route_set_type(sd_netlink_message *m, unsigned char type) { + 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_type = type; + + 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_route_get_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); + assert_return(scope, -EINVAL); + + rtm = NLMSG_DATA(m->hdr); + + *scope = rtm->rtm_scope; + + return 0; +} + +int sd_rtnl_message_route_get_tos(sd_netlink_message *m, uint8_t *tos) { + 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(tos, -EINVAL); + + rtm = NLMSG_DATA(m->hdr); + + *tos = rtm->rtm_tos; + + 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_dst_prefixlen(sd_netlink_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_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_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) || + IN_SET(rtm_family, AF_INET, 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_protocol = rtm_protocol; + + return 0; +} + +int sd_rtnl_message_new_nexthop(sd_netlink *rtnl, sd_netlink_message **ret, + uint16_t nlmsg_type, int nh_family, + unsigned char nh_protocol) { + struct nhmsg *nhm; + int r; + + assert_return(rtnl_message_type_is_nexthop(nlmsg_type), -EINVAL); + switch (nlmsg_type) { + case RTM_DELNEXTHOP: + assert_return(nh_family == AF_UNSPEC, -EINVAL); + _fallthrough_; + case RTM_GETNEXTHOP: + assert_return(nh_protocol == RTPROT_UNSPEC, -EINVAL); + break; + case RTM_NEWNEXTHOP: + assert_return(IN_SET(nh_family, AF_UNSPEC, AF_INET, AF_INET6), -EINVAL); + break; + default: + assert_not_reached(); + } + assert_return(ret, -EINVAL); + + r = message_new(rtnl, ret, nlmsg_type); + if (r < 0) + return r; + + if (nlmsg_type == RTM_NEWNEXTHOP) + (*ret)->hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_APPEND; + + nhm = NLMSG_DATA((*ret)->hdr); + + nhm->nh_family = nh_family; + nhm->nh_scope = RT_SCOPE_UNIVERSE; + nhm->nh_protocol = nh_protocol; + + return 0; +} + +int sd_rtnl_message_nexthop_set_flags(sd_netlink_message *m, uint8_t flags) { + struct nhmsg *nhm; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(m->hdr->nlmsg_type == RTM_NEWNEXTHOP, -EINVAL); + + nhm = NLMSG_DATA(m->hdr); + nhm->nh_flags = flags; + + return 0; +} + +int sd_rtnl_message_nexthop_get_flags(sd_netlink_message *m, uint8_t *ret) { + struct nhmsg *nhm; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_nexthop(m->hdr->nlmsg_type), -EINVAL); + assert_return(ret, -EINVAL); + + nhm = NLMSG_DATA(m->hdr); + *ret = nhm->nh_flags; + + return 0; +} + +int sd_rtnl_message_nexthop_get_family(sd_netlink_message *m, uint8_t *family) { + struct nhmsg *nhm; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_nexthop(m->hdr->nlmsg_type), -EINVAL); + assert_return(family, -EINVAL); + + nhm = NLMSG_DATA(m->hdr); + *family = nhm->nh_family; + + return 0; +} + +int sd_rtnl_message_nexthop_get_protocol(sd_netlink_message *m, uint8_t *protocol) { + struct nhmsg *nhm; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_nexthop(m->hdr->nlmsg_type), -EINVAL); + assert_return(protocol, -EINVAL); + + nhm = NLMSG_DATA(m->hdr); + *protocol = nhm->nh_protocol; + + return 0; +} + +int sd_rtnl_message_neigh_set_flags(sd_netlink_message *m, uint8_t flags) { + struct ndmsg *ndm; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_neigh(m->hdr->nlmsg_type), -EINVAL); + + ndm = NLMSG_DATA(m->hdr); + ndm->ndm_flags = flags; + + return 0; +} + +int sd_rtnl_message_neigh_set_state(sd_netlink_message *m, uint16_t state) { + struct ndmsg *ndm; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_neigh(m->hdr->nlmsg_type), -EINVAL); + + ndm = NLMSG_DATA(m->hdr); + ndm->ndm_state = state; + + return 0; +} + +int sd_rtnl_message_neigh_get_flags(sd_netlink_message *m, uint8_t *flags) { + struct ndmsg *ndm; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_neigh(m->hdr->nlmsg_type), -EINVAL); + + ndm = NLMSG_DATA(m->hdr); + *flags = ndm->ndm_flags; + + return 0; +} + +int sd_rtnl_message_neigh_get_state(sd_netlink_message *m, uint16_t *state) { + struct ndmsg *ndm; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_neigh(m->hdr->nlmsg_type), -EINVAL); + + ndm = NLMSG_DATA(m->hdr); + *state = ndm->ndm_state; + + return 0; +} + +int sd_rtnl_message_neigh_get_family(sd_netlink_message *m, int *family) { + struct ndmsg *ndm; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_neigh(m->hdr->nlmsg_type), -EINVAL); + assert_return(family, -EINVAL); + + ndm = NLMSG_DATA(m->hdr); + + *family = ndm->ndm_family; + + return 0; +} + +int sd_rtnl_message_neigh_get_ifindex(sd_netlink_message *m, int *index) { + struct ndmsg *ndm; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_neigh(m->hdr->nlmsg_type), -EINVAL); + assert_return(index, -EINVAL); + + ndm = NLMSG_DATA(m->hdr); + + *index = ndm->ndm_ifindex; + + return 0; +} + +int sd_rtnl_message_new_neigh( + sd_netlink *rtnl, + sd_netlink_message **ret, + uint16_t nlmsg_type, + int index, + int ndm_family) { + + struct ndmsg *ndm; + int r; + + assert_return(rtnl_message_type_is_neigh(nlmsg_type), -EINVAL); + assert_return(IN_SET(ndm_family, AF_UNSPEC, AF_INET, AF_INET6, AF_BRIDGE), -EINVAL); + assert_return(ret, -EINVAL); + + r = message_new(rtnl, ret, nlmsg_type); + if (r < 0) + return r; + + if (nlmsg_type == RTM_NEWNEIGH) { + if (ndm_family == AF_BRIDGE) + (*ret)->hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_APPEND; + else + (*ret)->hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_REPLACE; + } + + ndm = NLMSG_DATA((*ret)->hdr); + + ndm->ndm_family = ndm_family; + ndm->ndm_ifindex = index; + + return 0; +} + +int sd_rtnl_message_link_set_flags(sd_netlink_message *m, unsigned flags, unsigned change) { + struct ifinfomsg *ifi; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_link(m->hdr->nlmsg_type), -EINVAL); + assert_return(change != 0, -EINVAL); + + ifi = NLMSG_DATA(m->hdr); + + ifi->ifi_flags = flags; + ifi->ifi_change = change; + + return 0; +} + +int sd_rtnl_message_link_set_type(sd_netlink_message *m, unsigned type) { + struct ifinfomsg *ifi; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_link(m->hdr->nlmsg_type), -EINVAL); + + ifi = NLMSG_DATA(m->hdr); + + ifi->ifi_type = type; + + return 0; +} + +int sd_rtnl_message_link_set_family(sd_netlink_message *m, unsigned family) { + struct ifinfomsg *ifi; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_link(m->hdr->nlmsg_type), -EINVAL); + + ifi = NLMSG_DATA(m->hdr); + + ifi->ifi_family = family; + + return 0; +} + +int sd_rtnl_message_new_link(sd_netlink *rtnl, sd_netlink_message **ret, + uint16_t nlmsg_type, int index) { + struct ifinfomsg *ifi; + int r; + + assert_return(rtnl_message_type_is_link(nlmsg_type), -EINVAL); + assert_return(ret, -EINVAL); + + r = message_new(rtnl, ret, nlmsg_type); + if (r < 0) + return r; + + if (nlmsg_type == RTM_NEWLINK) + (*ret)->hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_EXCL; + else if (nlmsg_type == RTM_NEWLINKPROP) + (*ret)->hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_EXCL | NLM_F_APPEND; + + ifi = NLMSG_DATA((*ret)->hdr); + + ifi->ifi_family = AF_UNSPEC; + ifi->ifi_index = index; + + return 0; +} + +int sd_rtnl_message_addr_set_prefixlen(sd_netlink_message *m, unsigned char prefixlen) { + struct ifaddrmsg *ifa; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_addr(m->hdr->nlmsg_type), -EINVAL); + + ifa = NLMSG_DATA(m->hdr); + + if ((ifa->ifa_family == AF_INET && prefixlen > 32) || + (ifa->ifa_family == AF_INET6 && prefixlen > 128)) + return -ERANGE; + + ifa->ifa_prefixlen = prefixlen; + + return 0; +} + +int sd_rtnl_message_addr_set_flags(sd_netlink_message *m, unsigned char flags) { + struct ifaddrmsg *ifa; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_addr(m->hdr->nlmsg_type), -EINVAL); + + ifa = NLMSG_DATA(m->hdr); + + ifa->ifa_flags = flags; + + return 0; +} + +int sd_rtnl_message_addr_set_scope(sd_netlink_message *m, unsigned char scope) { + struct ifaddrmsg *ifa; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_addr(m->hdr->nlmsg_type), -EINVAL); + + ifa = NLMSG_DATA(m->hdr); + + ifa->ifa_scope = scope; + + return 0; +} + +int sd_rtnl_message_addr_get_family(sd_netlink_message *m, int *ret_family) { + struct ifaddrmsg *ifa; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_addr(m->hdr->nlmsg_type), -EINVAL); + assert_return(ret_family, -EINVAL); + + ifa = NLMSG_DATA(m->hdr); + + *ret_family = ifa->ifa_family; + + return 0; +} + +int sd_rtnl_message_addr_get_prefixlen(sd_netlink_message *m, unsigned char *ret_prefixlen) { + struct ifaddrmsg *ifa; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_addr(m->hdr->nlmsg_type), -EINVAL); + assert_return(ret_prefixlen, -EINVAL); + + ifa = NLMSG_DATA(m->hdr); + + *ret_prefixlen = ifa->ifa_prefixlen; + + return 0; +} + +int sd_rtnl_message_addr_get_scope(sd_netlink_message *m, unsigned char *ret_scope) { + struct ifaddrmsg *ifa; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_addr(m->hdr->nlmsg_type), -EINVAL); + assert_return(ret_scope, -EINVAL); + + ifa = NLMSG_DATA(m->hdr); + + *ret_scope = ifa->ifa_scope; + + return 0; +} + +int sd_rtnl_message_addr_get_flags(sd_netlink_message *m, unsigned char *ret_flags) { + struct ifaddrmsg *ifa; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_addr(m->hdr->nlmsg_type), -EINVAL); + assert_return(ret_flags, -EINVAL); + + ifa = NLMSG_DATA(m->hdr); + + *ret_flags = ifa->ifa_flags; + + return 0; +} + +int sd_rtnl_message_addr_get_ifindex(sd_netlink_message *m, int *ret_ifindex) { + struct ifaddrmsg *ifa; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_addr(m->hdr->nlmsg_type), -EINVAL); + assert_return(ret_ifindex, -EINVAL); + + ifa = NLMSG_DATA(m->hdr); + + *ret_ifindex = ifa->ifa_index; + + return 0; +} + +int sd_rtnl_message_new_addr( + sd_netlink *rtnl, + sd_netlink_message **ret, + uint16_t nlmsg_type, + int index, + int family) { + + struct ifaddrmsg *ifa; + int r; + + assert_return(rtnl_message_type_is_addr(nlmsg_type), -EINVAL); + assert_return((nlmsg_type == RTM_GETADDR && index == 0) || + index > 0, -EINVAL); + assert_return((nlmsg_type == RTM_GETADDR && family == AF_UNSPEC) || + IN_SET(family, AF_INET, AF_INET6), -EINVAL); + assert_return(ret, -EINVAL); + + r = message_new(rtnl, ret, nlmsg_type); + if (r < 0) + return r; + + ifa = NLMSG_DATA((*ret)->hdr); + + ifa->ifa_index = index; + ifa->ifa_family = family; + + return 0; +} + +int sd_rtnl_message_new_addr_update( + sd_netlink *rtnl, + sd_netlink_message **ret, + int index, + int family) { + int r; + + r = sd_rtnl_message_new_addr(rtnl, ret, RTM_NEWADDR, index, family); + if (r < 0) + return r; + + (*ret)->hdr->nlmsg_flags |= NLM_F_REPLACE; + + return 0; +} + +int sd_rtnl_message_link_get_ifindex(sd_netlink_message *m, int *ifindex) { + struct ifinfomsg *ifi; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_link(m->hdr->nlmsg_type), -EINVAL); + assert_return(ifindex, -EINVAL); + + ifi = NLMSG_DATA(m->hdr); + + *ifindex = ifi->ifi_index; + + return 0; +} + +int sd_rtnl_message_link_get_flags(sd_netlink_message *m, unsigned *flags) { + struct ifinfomsg *ifi; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_link(m->hdr->nlmsg_type), -EINVAL); + assert_return(flags, -EINVAL); + + ifi = NLMSG_DATA(m->hdr); + + *flags = ifi->ifi_flags; + + return 0; +} + +int sd_rtnl_message_link_get_type(sd_netlink_message *m, unsigned short *type) { + struct ifinfomsg *ifi; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_link(m->hdr->nlmsg_type), -EINVAL); + assert_return(type, -EINVAL); + + ifi = NLMSG_DATA(m->hdr); + + *type = ifi->ifi_type; + + 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; + } else if (rtnl_message_type_is_nexthop(m->hdr->nlmsg_type)) { + struct nhmsg *nhm; + + nhm = NLMSG_DATA(m->hdr); + + *family = nhm->nh_family; + + return 0; + } + + return -EOPNOTSUPP; +} + +int sd_rtnl_message_new_addrlabel( + sd_netlink *rtnl, + sd_netlink_message **ret, + uint16_t nlmsg_type, + int ifindex, + int ifal_family) { + + struct ifaddrlblmsg *addrlabel; + int r; + + assert_return(rtnl_message_type_is_addrlabel(nlmsg_type), -EINVAL); + assert_return(ret, -EINVAL); + + r = message_new(rtnl, ret, nlmsg_type); + if (r < 0) + return r; + + if (nlmsg_type == RTM_NEWADDRLABEL) + (*ret)->hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_EXCL; + + addrlabel = NLMSG_DATA((*ret)->hdr); + + addrlabel->ifal_family = ifal_family; + addrlabel->ifal_index = ifindex; + + return 0; +} + +int sd_rtnl_message_addrlabel_set_prefixlen(sd_netlink_message *m, unsigned char prefixlen) { + struct ifaddrlblmsg *addrlabel; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_addrlabel(m->hdr->nlmsg_type), -EINVAL); + + addrlabel = NLMSG_DATA(m->hdr); + + if (prefixlen > 128) + return -ERANGE; + + addrlabel->ifal_prefixlen = prefixlen; + + return 0; +} + +int sd_rtnl_message_addrlabel_get_prefixlen(sd_netlink_message *m, unsigned char *prefixlen) { + struct ifaddrlblmsg *addrlabel; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_addrlabel(m->hdr->nlmsg_type), -EINVAL); + + addrlabel = NLMSG_DATA(m->hdr); + + *prefixlen = addrlabel->ifal_prefixlen; + + return 0; +} + +int sd_rtnl_message_new_routing_policy_rule( + sd_netlink *rtnl, + sd_netlink_message **ret, + uint16_t nlmsg_type, + int ifal_family) { + + struct fib_rule_hdr *frh; + int r; + + assert_return(rtnl_message_type_is_routing_policy_rule(nlmsg_type), -EINVAL); + assert_return(ret, -EINVAL); + + r = message_new(rtnl, ret, nlmsg_type); + if (r < 0) + return r; + + if (nlmsg_type == RTM_NEWRULE) + (*ret)->hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_EXCL; + + frh = NLMSG_DATA((*ret)->hdr); + frh->family = ifal_family; + + return 0; +} + +int sd_rtnl_message_routing_policy_rule_set_tos(sd_netlink_message *m, uint8_t tos) { + struct fib_rule_hdr *frh; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_routing_policy_rule(m->hdr->nlmsg_type), -EINVAL); + + frh = NLMSG_DATA(m->hdr); + + frh->tos = tos; + + return 0; +} + +int sd_rtnl_message_routing_policy_rule_get_tos(sd_netlink_message *m, uint8_t *tos) { + struct fib_rule_hdr *frh; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_routing_policy_rule(m->hdr->nlmsg_type), -EINVAL); + + frh = NLMSG_DATA(m->hdr); + + *tos = frh->tos; + + return 0; +} + +int sd_rtnl_message_routing_policy_rule_set_table(sd_netlink_message *m, uint8_t table) { + struct fib_rule_hdr *frh; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_routing_policy_rule(m->hdr->nlmsg_type), -EINVAL); + + frh = NLMSG_DATA(m->hdr); + + frh->table = table; + + return 0; +} + +int sd_rtnl_message_routing_policy_rule_get_table(sd_netlink_message *m, uint8_t *table) { + struct fib_rule_hdr *frh; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_routing_policy_rule(m->hdr->nlmsg_type), -EINVAL); + + frh = NLMSG_DATA(m->hdr); + + *table = frh->table; + + return 0; +} + +int sd_rtnl_message_routing_policy_rule_set_flags(sd_netlink_message *m, uint32_t flags) { + struct fib_rule_hdr *frh; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_routing_policy_rule(m->hdr->nlmsg_type), -EINVAL); + + frh = NLMSG_DATA(m->hdr); + frh->flags = flags; + + return 0; +} + +int sd_rtnl_message_routing_policy_rule_get_flags(sd_netlink_message *m, uint32_t *flags) { + struct fib_rule_hdr *frh; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_routing_policy_rule(m->hdr->nlmsg_type), -EINVAL); + + frh = NLMSG_DATA(m->hdr); + *flags = frh->flags; + + return 0; +} + +int sd_rtnl_message_routing_policy_rule_set_fib_type(sd_netlink_message *m, uint8_t type) { + struct fib_rule_hdr *frh; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_routing_policy_rule(m->hdr->nlmsg_type), -EINVAL); + + frh = NLMSG_DATA(m->hdr); + + frh->action = type; + + return 0; +} + +int sd_rtnl_message_routing_policy_rule_get_fib_type(sd_netlink_message *m, uint8_t *type) { + struct fib_rule_hdr *frh; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_routing_policy_rule(m->hdr->nlmsg_type), -EINVAL); + + frh = NLMSG_DATA(m->hdr); + + *type = frh->action; + + return 0; +} + +int sd_rtnl_message_routing_policy_rule_set_fib_dst_prefixlen(sd_netlink_message *m, uint8_t len) { + struct fib_rule_hdr *frh; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_routing_policy_rule(m->hdr->nlmsg_type), -EINVAL); + + frh = NLMSG_DATA(m->hdr); + + frh->dst_len = len; + + return 0; +} + +int sd_rtnl_message_routing_policy_rule_get_fib_dst_prefixlen(sd_netlink_message *m, uint8_t *len) { + struct fib_rule_hdr *frh; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_routing_policy_rule(m->hdr->nlmsg_type), -EINVAL); + + frh = NLMSG_DATA(m->hdr); + + *len = frh->dst_len; + + return 0; +} + +int sd_rtnl_message_routing_policy_rule_set_fib_src_prefixlen(sd_netlink_message *m, uint8_t len) { + struct fib_rule_hdr *frh; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_routing_policy_rule(m->hdr->nlmsg_type), -EINVAL); + + frh = NLMSG_DATA(m->hdr); + + frh->src_len = len; + + return 0; +} + +int sd_rtnl_message_routing_policy_rule_get_fib_src_prefixlen(sd_netlink_message *m, uint8_t *len) { + struct fib_rule_hdr *frh; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_routing_policy_rule(m->hdr->nlmsg_type), -EINVAL); + + frh = NLMSG_DATA(m->hdr); + + *len = frh->src_len; + + return 0; +} + +int sd_rtnl_message_new_traffic_control( + sd_netlink *rtnl, + sd_netlink_message **ret, + uint16_t nlmsg_type, + int ifindex, + uint32_t handle, + uint32_t parent) { + + struct tcmsg *tcm; + int r; + + assert_return(rtnl_message_type_is_traffic_control(nlmsg_type), -EINVAL); + assert_return(ret, -EINVAL); + + r = message_new(rtnl, ret, nlmsg_type); + if (r < 0) + return r; + + if (IN_SET(nlmsg_type, RTM_NEWQDISC, RTM_NEWTCLASS)) + (*ret)->hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_EXCL; + + tcm = NLMSG_DATA((*ret)->hdr); + tcm->tcm_ifindex = ifindex; + tcm->tcm_handle = handle; + tcm->tcm_parent = parent; + + return 0; +} + +int sd_rtnl_message_traffic_control_get_ifindex(sd_netlink_message *m, int *ret) { + struct tcmsg *tcm; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_traffic_control(m->hdr->nlmsg_type), -EINVAL); + assert_return(ret, -EINVAL); + + tcm = NLMSG_DATA(m->hdr); + *ret = tcm->tcm_ifindex; + + return 0; +} + +int sd_rtnl_message_traffic_control_get_handle(sd_netlink_message *m, uint32_t *ret) { + struct tcmsg *tcm; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_traffic_control(m->hdr->nlmsg_type), -EINVAL); + assert_return(ret, -EINVAL); + + tcm = NLMSG_DATA(m->hdr); + *ret = tcm->tcm_handle; + + return 0; +} + +int sd_rtnl_message_traffic_control_get_parent(sd_netlink_message *m, uint32_t *ret) { + struct tcmsg *tcm; + + assert_return(m, -EINVAL); + assert_return(m->hdr, -EINVAL); + assert_return(rtnl_message_type_is_traffic_control(m->hdr->nlmsg_type), -EINVAL); + assert_return(ret, -EINVAL); + + tcm = NLMSG_DATA(m->hdr); + *ret = tcm->tcm_parent; + + return 0; +} + +int sd_rtnl_message_new_mdb( + sd_netlink *rtnl, + sd_netlink_message **ret, + uint16_t nlmsg_type, + int mdb_ifindex) { + + struct br_port_msg *bpm; + int r; + + assert_return(rtnl_message_type_is_mdb(nlmsg_type), -EINVAL); + assert_return(ret, -EINVAL); + + r = message_new(rtnl, ret, nlmsg_type); + if (r < 0) + return r; + + if (nlmsg_type == RTM_NEWMDB) + (*ret)->hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_EXCL; + + bpm = NLMSG_DATA((*ret)->hdr); + bpm->family = AF_BRIDGE; + bpm->ifindex = mdb_ifindex; + + return 0; +} |