diff options
Diffstat (limited to 'src/libsystemd/sd-netlink/generic-netlink.c')
| -rw-r--r-- | src/libsystemd/sd-netlink/generic-netlink.c | 179 |
1 files changed, 0 insertions, 179 deletions
diff --git a/src/libsystemd/sd-netlink/generic-netlink.c b/src/libsystemd/sd-netlink/generic-netlink.c deleted file mode 100644 index 69f1a0cef5..0000000000 --- a/src/libsystemd/sd-netlink/generic-netlink.c +++ /dev/null @@ -1,179 +0,0 @@ -/* SPDX-License-Identifier: LGPL-2.1-or-later */ - -#include <linux/genetlink.h> - -#include "sd-netlink.h" - -#include "alloc-util.h" -#include "generic-netlink.h" -#include "netlink-internal.h" - -typedef struct { - const char* name; - uint8_t version; -} genl_family; - -static const genl_family genl_families[] = { - [SD_GENL_ID_CTRL] = { .name = "", .version = 1 }, - [SD_GENL_WIREGUARD] = { .name = "wireguard", .version = 1 }, - [SD_GENL_FOU] = { .name = "fou", .version = 1 }, - [SD_GENL_L2TP] = { .name = "l2tp", .version = 1 }, - [SD_GENL_MACSEC] = { .name = "macsec", .version = 1 }, - [SD_GENL_NL80211] = { .name = "nl80211", .version = 1 }, - [SD_GENL_BATADV] = { .name = "batadv", .version = 1 }, -}; - -int sd_genl_socket_open(sd_netlink **ret) { - return netlink_open_family(ret, NETLINK_GENERIC); -} - -static int genl_message_new(sd_netlink *nl, sd_genl_family_t family, uint16_t nlmsg_type, uint8_t cmd, sd_netlink_message **ret) { - _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; - const NLType *genl_cmd_type, *nl_type; - const NLTypeSystem *type_system; - size_t size; - int r; - - assert(nl); - assert(nl->protocol == NETLINK_GENERIC); - assert(ret); - - r = type_system_get_type(&genl_family_type_system_root, &genl_cmd_type, family); - if (r < 0) - return r; - - r = message_new_empty(nl, &m); - if (r < 0) - return r; - - size = NLMSG_SPACE(sizeof(struct genlmsghdr)); - m->hdr = malloc0(size); - if (!m->hdr) - return -ENOMEM; - - m->hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; - - type_get_type_system(genl_cmd_type, &type_system); - - r = type_system_get_type(type_system, &nl_type, cmd); - if (r < 0) - return r; - - m->hdr->nlmsg_len = size; - m->hdr->nlmsg_type = nlmsg_type; - - type_get_type_system(nl_type, &m->containers[0].type_system); - - *(struct genlmsghdr *) NLMSG_DATA(m->hdr) = (struct genlmsghdr) { - .cmd = cmd, - .version = genl_families[family].version, - }; - - *ret = TAKE_PTR(m); - - return 0; -} - -static int lookup_nlmsg_type(sd_netlink *nl, sd_genl_family_t family, uint16_t *ret) { - _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL; - uint16_t u; - void *v; - int r; - - assert(nl); - assert(nl->protocol == NETLINK_GENERIC); - assert(ret); - - if (family == SD_GENL_ID_CTRL) { - *ret = GENL_ID_CTRL; - return 0; - } - - v = hashmap_get(nl->genl_family_to_nlmsg_type, INT_TO_PTR(family)); - if (v) { - *ret = PTR_TO_UINT(v); - return 0; - } - - r = genl_message_new(nl, SD_GENL_ID_CTRL, GENL_ID_CTRL, CTRL_CMD_GETFAMILY, &req); - if (r < 0) - return r; - - r = sd_netlink_message_append_string(req, CTRL_ATTR_FAMILY_NAME, genl_families[family].name); - if (r < 0) - return r; - - r = sd_netlink_call(nl, req, 0, &reply); - if (r < 0) - return r; - - r = sd_netlink_message_read_u16(reply, CTRL_ATTR_FAMILY_ID, &u); - if (r < 0) - return r; - - r = hashmap_ensure_put(&nl->genl_family_to_nlmsg_type, NULL, INT_TO_PTR(family), UINT_TO_PTR(u)); - if (r < 0) - return r; - - r = hashmap_ensure_put(&nl->nlmsg_type_to_genl_family, NULL, UINT_TO_PTR(u), INT_TO_PTR(family)); - if (r < 0) - return r; - - *ret = u; - return 0; -} - -int sd_genl_message_new(sd_netlink *nl, sd_genl_family_t family, uint8_t cmd, sd_netlink_message **ret) { - uint16_t nlmsg_type = 0; /* Unnecessary initialization to appease gcc */ - int r; - - assert_return(nl, -EINVAL); - assert_return(nl->protocol == NETLINK_GENERIC, -EINVAL); - assert_return(ret, -EINVAL); - - r = lookup_nlmsg_type(nl, family, &nlmsg_type); - if (r < 0) - return r; - - return genl_message_new(nl, family, nlmsg_type, cmd, ret); -} - -int nlmsg_type_to_genl_family(const sd_netlink *nl, uint16_t nlmsg_type, sd_genl_family_t *ret) { - void *p; - - assert(nl); - assert(nl->protocol == NETLINK_GENERIC); - assert(ret); - - if (nlmsg_type == NLMSG_ERROR) - *ret = SD_GENL_ERROR; - else if (nlmsg_type == NLMSG_DONE) - *ret = SD_GENL_DONE; - else if (nlmsg_type == GENL_ID_CTRL) - *ret = SD_GENL_ID_CTRL; - else { - p = hashmap_get(nl->nlmsg_type_to_genl_family, UINT_TO_PTR(nlmsg_type)); - if (!p) - return -EOPNOTSUPP; - - *ret = PTR_TO_INT(p); - } - - return 0; -} - -int sd_genl_message_get_family(sd_netlink *nl, sd_netlink_message *m, sd_genl_family_t *ret) { - uint16_t nlmsg_type; - int r; - - assert_return(nl, -EINVAL); - assert_return(nl->protocol == NETLINK_GENERIC, -EINVAL); - assert_return(m, -EINVAL); - assert_return(ret, -EINVAL); - - r = sd_netlink_message_get_type(m, &nlmsg_type); - if (r < 0) - return r; - - return nlmsg_type_to_genl_family(nl, nlmsg_type, ret); -} |