diff options
Diffstat (limited to 'src/libsystemd/sd-netlink/netlink-message.c')
| -rw-r--r-- | src/libsystemd/sd-netlink/netlink-message.c | 963 |
1 files changed, 0 insertions, 963 deletions
diff --git a/src/libsystemd/sd-netlink/netlink-message.c b/src/libsystemd/sd-netlink/netlink-message.c deleted file mode 100644 index df3b3c922e..0000000000 --- a/src/libsystemd/sd-netlink/netlink-message.c +++ /dev/null @@ -1,963 +0,0 @@ -/*** - This file is part of systemd. - - Copyright 2013 Tom Gundersen <teg@jklm.no> - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <netinet/in.h> -#include <stdbool.h> -#include <unistd.h> - -#include "sd-netlink.h" - -#include "alloc-util.h" -#include "formats-util.h" -#include "missing.h" -#include "netlink-internal.h" -#include "netlink-types.h" -#include "netlink-util.h" -#include "refcnt.h" -#include "socket-util.h" -#include "util.h" - -#define GET_CONTAINER(m, i) ((i) < (m)->n_containers ? (struct rtattr*)((uint8_t*)(m)->hdr + (m)->containers[i].offset) : NULL) -#define PUSH_CONTAINER(m, new) (m)->container_offsets[(m)->n_containers++] = (uint8_t*)(new) - (uint8_t*)(m)->hdr; - -#define RTA_TYPE(rta) ((rta)->rta_type & NLA_TYPE_MASK) -#define RTA_FLAGS(rta) ((rta)->rta_type & ~NLA_TYPE_MASK) - -int message_new_empty(sd_netlink *rtnl, sd_netlink_message **ret) { - sd_netlink_message *m; - - assert_return(ret, -EINVAL); - - /* Note that 'rtnl' is currently unused, if we start using it internally - we must take care to avoid problems due to mutual references between - buses and their queued messages. See sd-bus. - */ - - m = new0(sd_netlink_message, 1); - if (!m) - return -ENOMEM; - - m->n_ref = REFCNT_INIT; - - m->sealed = false; - - *ret = m; - - return 0; -} - -int message_new(sd_netlink *rtnl, sd_netlink_message **ret, uint16_t type) { - _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; - const NLType *nl_type; - size_t size; - int r; - - r = type_system_get_type(&type_system_root, &nl_type, type); - if (r < 0) - return r; - - if (type_get_type(nl_type) != NETLINK_TYPE_NESTED) - return -EINVAL; - - r = message_new_empty(rtnl, &m); - if (r < 0) - return r; - - size = NLMSG_SPACE(type_get_size(nl_type)); - - assert(size >= sizeof(struct nlmsghdr)); - m->hdr = malloc0(size); - if (!m->hdr) - return -ENOMEM; - - m->hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; - - type_get_type_system(nl_type, &m->containers[0].type_system); - m->hdr->nlmsg_len = size; - m->hdr->nlmsg_type = type; - - *ret = m; - m = NULL; - - return 0; -} - -int sd_netlink_message_request_dump(sd_netlink_message *m, int dump) { - assert_return(m, -EINVAL); - assert_return(m->hdr, -EINVAL); - assert_return(m->hdr->nlmsg_type == RTM_GETLINK || - m->hdr->nlmsg_type == RTM_GETADDR || - m->hdr->nlmsg_type == RTM_GETROUTE || - m->hdr->nlmsg_type == RTM_GETNEIGH, - -EINVAL); - - SET_FLAG(m->hdr->nlmsg_flags, NLM_F_DUMP, dump); - - return 0; -} - -sd_netlink_message *sd_netlink_message_ref(sd_netlink_message *m) { - if (m) - assert_se(REFCNT_INC(m->n_ref) >= 2); - - return m; -} - -sd_netlink_message *sd_netlink_message_unref(sd_netlink_message *m) { - sd_netlink_message *t; - - while (m && REFCNT_DEC(m->n_ref) == 0) { - unsigned i; - - free(m->hdr); - - for (i = 0; i <= m->n_containers; i++) - free(m->containers[i].attributes); - - t = m; - m = m->next; - free(t); - } - - return NULL; -} - -int sd_netlink_message_get_type(sd_netlink_message *m, uint16_t *type) { - assert_return(m, -EINVAL); - assert_return(type, -EINVAL); - - *type = m->hdr->nlmsg_type; - - return 0; -} - -int sd_netlink_message_set_flags(sd_netlink_message *m, uint16_t flags) { - assert_return(m, -EINVAL); - assert_return(flags, -EINVAL); - - m->hdr->nlmsg_flags = flags; - - return 0; -} - -int sd_netlink_message_is_broadcast(sd_netlink_message *m) { - assert_return(m, -EINVAL); - - return m->broadcast; -} - -/* If successful the updated message will be correctly aligned, if - unsuccessful the old message is untouched. */ -static int add_rtattr(sd_netlink_message *m, unsigned short type, const void *data, size_t data_length) { - uint32_t rta_length; - size_t message_length, padding_length; - struct nlmsghdr *new_hdr; - struct rtattr *rta; - char *padding; - unsigned i; - int offset; - - assert(m); - assert(m->hdr); - assert(!m->sealed); - assert(NLMSG_ALIGN(m->hdr->nlmsg_len) == m->hdr->nlmsg_len); - assert(!data || data_length); - - /* get offset of the new attribute */ - offset = m->hdr->nlmsg_len; - - /* get the size of the new rta attribute (with padding at the end) */ - rta_length = RTA_LENGTH(data_length); - - /* get the new message size (with padding at the end) */ - message_length = offset + RTA_ALIGN(rta_length); - - /* realloc to fit the new attribute */ - new_hdr = realloc(m->hdr, message_length); - if (!new_hdr) - return -ENOMEM; - m->hdr = new_hdr; - - /* get pointer to the attribute we are about to add */ - rta = (struct rtattr *) ((uint8_t *) m->hdr + offset); - - /* if we are inside containers, extend them */ - for (i = 0; i < m->n_containers; i++) - GET_CONTAINER(m, i)->rta_len += message_length - offset; - - /* fill in the attribute */ - rta->rta_type = type; - rta->rta_len = rta_length; - if (data) - /* we don't deal with the case where the user lies about the type - * and gives us too little data (so don't do that) - */ - padding = mempcpy(RTA_DATA(rta), data, data_length); - - else - /* if no data was passed, make sure we still initialize the padding - note that we can have data_length > 0 (used by some containers) */ - padding = RTA_DATA(rta); - - /* make sure also the padding at the end of the message is initialized */ - padding_length = (uint8_t*)m->hdr + message_length - (uint8_t*)padding; - memzero(padding, padding_length); - - /* update message size */ - m->hdr->nlmsg_len = message_length; - - return offset; -} - -static int message_attribute_has_type(sd_netlink_message *m, size_t *out_size, uint16_t attribute_type, uint16_t data_type) { - const NLType *type; - int r; - - assert(m); - - r = type_system_get_type(m->containers[m->n_containers].type_system, &type, attribute_type); - if (r < 0) - return r; - - if (type_get_type(type) != data_type) - return -EINVAL; - - if (out_size) - *out_size = type_get_size(type); - return 0; -} - -int sd_netlink_message_append_string(sd_netlink_message *m, unsigned short type, const char *data) { - size_t length, size; - int r; - - assert_return(m, -EINVAL); - assert_return(!m->sealed, -EPERM); - assert_return(data, -EINVAL); - - r = message_attribute_has_type(m, &size, type, NETLINK_TYPE_STRING); - if (r < 0) - return r; - - if (size) { - length = strnlen(data, size+1); - if (length > size) - return -EINVAL; - } else - length = strlen(data); - - r = add_rtattr(m, type, data, length + 1); - if (r < 0) - return r; - - return 0; -} - -int sd_netlink_message_append_flag(sd_netlink_message *m, unsigned short type) { - size_t size; - int r; - - assert_return(m, -EINVAL); - assert_return(!m->sealed, -EPERM); - - r = message_attribute_has_type(m, &size, type, NETLINK_TYPE_FLAG); - if (r < 0) - return r; - - r = add_rtattr(m, type, NULL, 0); - if (r < 0) - return r; - - return 0; -} - -int sd_netlink_message_append_u8(sd_netlink_message *m, unsigned short type, uint8_t data) { - int r; - - assert_return(m, -EINVAL); - assert_return(!m->sealed, -EPERM); - - r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_U8); - if (r < 0) - return r; - - r = add_rtattr(m, type, &data, sizeof(uint8_t)); - if (r < 0) - return r; - - return 0; -} - - -int sd_netlink_message_append_u16(sd_netlink_message *m, unsigned short type, uint16_t data) { - int r; - - assert_return(m, -EINVAL); - assert_return(!m->sealed, -EPERM); - - r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_U16); - if (r < 0) - return r; - - r = add_rtattr(m, type, &data, sizeof(uint16_t)); - if (r < 0) - return r; - - return 0; -} - -int sd_netlink_message_append_u32(sd_netlink_message *m, unsigned short type, uint32_t data) { - int r; - - assert_return(m, -EINVAL); - assert_return(!m->sealed, -EPERM); - - r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_U32); - if (r < 0) - return r; - - r = add_rtattr(m, type, &data, sizeof(uint32_t)); - if (r < 0) - return r; - - return 0; -} - -int sd_netlink_message_append_data(sd_netlink_message *m, unsigned short type, const void *data, size_t len) { - int r; - - assert_return(m, -EINVAL); - assert_return(!m->sealed, -EPERM); - - r = add_rtattr(m, type, data, len); - if (r < 0) - return r; - - return 0; -} - -int sd_netlink_message_append_in_addr(sd_netlink_message *m, unsigned short type, const struct in_addr *data) { - int r; - - assert_return(m, -EINVAL); - assert_return(!m->sealed, -EPERM); - assert_return(data, -EINVAL); - - r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_IN_ADDR); - if (r < 0) - return r; - - r = add_rtattr(m, type, data, sizeof(struct in_addr)); - if (r < 0) - return r; - - return 0; -} - -int sd_netlink_message_append_in6_addr(sd_netlink_message *m, unsigned short type, const struct in6_addr *data) { - int r; - - assert_return(m, -EINVAL); - assert_return(!m->sealed, -EPERM); - assert_return(data, -EINVAL); - - r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_IN_ADDR); - if (r < 0) - return r; - - r = add_rtattr(m, type, data, sizeof(struct in6_addr)); - if (r < 0) - return r; - - return 0; -} - -int sd_netlink_message_append_ether_addr(sd_netlink_message *m, unsigned short type, const struct ether_addr *data) { - int r; - - assert_return(m, -EINVAL); - assert_return(!m->sealed, -EPERM); - assert_return(data, -EINVAL); - - r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_ETHER_ADDR); - if (r < 0) - return r; - - r = add_rtattr(m, type, data, ETH_ALEN); - if (r < 0) - return r; - - return 0; -} - -int sd_netlink_message_append_cache_info(sd_netlink_message *m, unsigned short type, const struct ifa_cacheinfo *info) { - int r; - - assert_return(m, -EINVAL); - assert_return(!m->sealed, -EPERM); - assert_return(info, -EINVAL); - - r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_CACHE_INFO); - if (r < 0) - return r; - - r = add_rtattr(m, type, info, sizeof(struct ifa_cacheinfo)); - if (r < 0) - return r; - - return 0; -} - -int sd_netlink_message_open_container(sd_netlink_message *m, unsigned short type) { - size_t size; - int r; - - assert_return(m, -EINVAL); - assert_return(!m->sealed, -EPERM); - assert_return(m->n_containers < RTNL_CONTAINER_DEPTH, -ERANGE); - - r = message_attribute_has_type(m, &size, type, NETLINK_TYPE_NESTED); - if (r < 0) { - const NLTypeSystemUnion *type_system_union; - int family; - - r = message_attribute_has_type(m, &size, type, NETLINK_TYPE_UNION); - if (r < 0) - return r; - - r = sd_rtnl_message_get_family(m, &family); - if (r < 0) - return r; - - r = type_system_get_type_system_union(m->containers[m->n_containers].type_system, &type_system_union, type); - if (r < 0) - return r; - - r = type_system_union_protocol_get_type_system(type_system_union, - &m->containers[m->n_containers + 1].type_system, - family); - if (r < 0) - return r; - } else { - r = type_system_get_type_system(m->containers[m->n_containers].type_system, - &m->containers[m->n_containers + 1].type_system, - type); - if (r < 0) - return r; - } - - r = add_rtattr(m, type | NLA_F_NESTED, NULL, size); - if (r < 0) - return r; - - m->containers[m->n_containers++].offset = r; - - return 0; -} - -int sd_netlink_message_open_container_union(sd_netlink_message *m, unsigned short type, const char *key) { - const NLTypeSystemUnion *type_system_union; - int r; - - assert_return(m, -EINVAL); - assert_return(!m->sealed, -EPERM); - - r = type_system_get_type_system_union(m->containers[m->n_containers].type_system, &type_system_union, type); - if (r < 0) - return r; - - r = type_system_union_get_type_system(type_system_union, - &m->containers[m->n_containers + 1].type_system, - key); - if (r < 0) - return r; - - r = sd_netlink_message_append_string(m, type_system_union->match, key); - if (r < 0) - return r; - - /* do we evere need non-null size */ - r = add_rtattr(m, type | NLA_F_NESTED, NULL, 0); - if (r < 0) - return r; - - m->containers[m->n_containers++].offset = r; - - return 0; -} - - -int sd_netlink_message_close_container(sd_netlink_message *m) { - assert_return(m, -EINVAL); - assert_return(!m->sealed, -EPERM); - assert_return(m->n_containers > 0, -EINVAL); - - m->containers[m->n_containers].type_system = NULL; - m->n_containers--; - - return 0; -} - -static int netlink_message_read_internal(sd_netlink_message *m, unsigned short type, void **data, bool *net_byteorder) { - struct netlink_attribute *attribute; - struct rtattr *rta; - - assert_return(m, -EINVAL); - assert_return(m->sealed, -EPERM); - assert_return(data, -EINVAL); - assert(m->n_containers < RTNL_CONTAINER_DEPTH); - assert(m->containers[m->n_containers].attributes); - assert(type < m->containers[m->n_containers].n_attributes); - - attribute = &m->containers[m->n_containers].attributes[type]; - - if (!attribute->offset) - return -ENODATA; - - rta = (struct rtattr*)((uint8_t *) m->hdr + attribute->offset); - - *data = RTA_DATA(rta); - - if (net_byteorder) - *net_byteorder = attribute->net_byteorder; - - return RTA_PAYLOAD(rta); -} - -int sd_netlink_message_read_string(sd_netlink_message *m, unsigned short type, const char **data) { - int r; - void *attr_data; - - assert_return(m, -EINVAL); - - r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_STRING); - if (r < 0) - return r; - - r = netlink_message_read_internal(m, type, &attr_data, NULL); - if (r < 0) - return r; - else if (strnlen(attr_data, r) >= (size_t) r) - return -EIO; - - if (data) - *data = (const char *) attr_data; - - return 0; -} - -int sd_netlink_message_read_u8(sd_netlink_message *m, unsigned short type, uint8_t *data) { - int r; - void *attr_data; - - assert_return(m, -EINVAL); - - r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_U8); - if (r < 0) - return r; - - r = netlink_message_read_internal(m, type, &attr_data, NULL); - if (r < 0) - return r; - else if ((size_t) r < sizeof(uint8_t)) - return -EIO; - - if (data) - *data = *(uint8_t *) attr_data; - - return 0; -} - -int sd_netlink_message_read_u16(sd_netlink_message *m, unsigned short type, uint16_t *data) { - void *attr_data; - bool net_byteorder; - int r; - - assert_return(m, -EINVAL); - - r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_U16); - if (r < 0) - return r; - - r = netlink_message_read_internal(m, type, &attr_data, &net_byteorder); - if (r < 0) - return r; - else if ((size_t) r < sizeof(uint16_t)) - return -EIO; - - if (data) { - if (net_byteorder) - *data = be16toh(*(uint16_t *) attr_data); - else - *data = *(uint16_t *) attr_data; - } - - return 0; -} - -int sd_netlink_message_read_u32(sd_netlink_message *m, unsigned short type, uint32_t *data) { - void *attr_data; - bool net_byteorder; - int r; - - assert_return(m, -EINVAL); - - r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_U32); - if (r < 0) - return r; - - r = netlink_message_read_internal(m, type, &attr_data, &net_byteorder); - if (r < 0) - return r; - else if ((size_t)r < sizeof(uint32_t)) - return -EIO; - - if (data) { - if (net_byteorder) - *data = be32toh(*(uint32_t *) attr_data); - else - *data = *(uint32_t *) attr_data; - } - - return 0; -} - -int sd_netlink_message_read_ether_addr(sd_netlink_message *m, unsigned short type, struct ether_addr *data) { - int r; - void *attr_data; - - assert_return(m, -EINVAL); - - r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_ETHER_ADDR); - if (r < 0) - return r; - - r = netlink_message_read_internal(m, type, &attr_data, NULL); - if (r < 0) - return r; - else if ((size_t)r < sizeof(struct ether_addr)) - return -EIO; - - if (data) - memcpy(data, attr_data, sizeof(struct ether_addr)); - - return 0; -} - -int sd_netlink_message_read_cache_info(sd_netlink_message *m, unsigned short type, struct ifa_cacheinfo *info) { - int r; - void *attr_data; - - assert_return(m, -EINVAL); - - r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_CACHE_INFO); - if (r < 0) - return r; - - r = netlink_message_read_internal(m, type, &attr_data, NULL); - if (r < 0) - return r; - else if ((size_t)r < sizeof(struct ifa_cacheinfo)) - return -EIO; - - if (info) - memcpy(info, attr_data, sizeof(struct ifa_cacheinfo)); - - return 0; -} - -int sd_netlink_message_read_in_addr(sd_netlink_message *m, unsigned short type, struct in_addr *data) { - int r; - void *attr_data; - - assert_return(m, -EINVAL); - - r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_IN_ADDR); - if (r < 0) - return r; - - r = netlink_message_read_internal(m, type, &attr_data, NULL); - if (r < 0) - return r; - else if ((size_t)r < sizeof(struct in_addr)) - return -EIO; - - if (data) - memcpy(data, attr_data, sizeof(struct in_addr)); - - return 0; -} - -int sd_netlink_message_read_in6_addr(sd_netlink_message *m, unsigned short type, struct in6_addr *data) { - int r; - void *attr_data; - - assert_return(m, -EINVAL); - - r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_IN_ADDR); - if (r < 0) - return r; - - r = netlink_message_read_internal(m, type, &attr_data, NULL); - if (r < 0) - return r; - else if ((size_t)r < sizeof(struct in6_addr)) - return -EIO; - - if (data) - memcpy(data, attr_data, sizeof(struct in6_addr)); - - return 0; -} - -static int netlink_container_parse(sd_netlink_message *m, - struct netlink_container *container, - int count, - struct rtattr *rta, - unsigned int rt_len) { - _cleanup_free_ struct netlink_attribute *attributes = NULL; - - attributes = new0(struct netlink_attribute, count); - if (!attributes) - return -ENOMEM; - - for (; RTA_OK(rta, rt_len); rta = RTA_NEXT(rta, rt_len)) { - unsigned short type; - - type = RTA_TYPE(rta); - - /* if the kernel is newer than the headers we used - when building, we ignore out-of-range attributes */ - if (type >= count) - continue; - - if (attributes[type].offset) - log_debug("rtnl: message parse - overwriting repeated attribute"); - - attributes[type].offset = (uint8_t *) rta - (uint8_t *) m->hdr; - attributes[type].nested = RTA_FLAGS(rta) & NLA_F_NESTED; - attributes[type].net_byteorder = RTA_FLAGS(rta) & NLA_F_NET_BYTEORDER; - } - - container->attributes = attributes; - attributes = NULL; - container->n_attributes = count; - - return 0; -} - -int sd_netlink_message_enter_container(sd_netlink_message *m, unsigned short type_id) { - const NLType *nl_type; - const NLTypeSystem *type_system; - void *container; - uint16_t type; - size_t size; - int r; - - assert_return(m, -EINVAL); - assert_return(m->n_containers < RTNL_CONTAINER_DEPTH, -EINVAL); - - r = type_system_get_type(m->containers[m->n_containers].type_system, - &nl_type, - type_id); - if (r < 0) - return r; - - type = type_get_type(nl_type); - - if (type == NETLINK_TYPE_NESTED) { - r = type_system_get_type_system(m->containers[m->n_containers].type_system, - &type_system, - type_id); - if (r < 0) - return r; - } else if (type == NETLINK_TYPE_UNION) { - const NLTypeSystemUnion *type_system_union; - - r = type_system_get_type_system_union(m->containers[m->n_containers].type_system, - &type_system_union, - type_id); - if (r < 0) - return r; - - switch (type_system_union->match_type) { - case NL_MATCH_SIBLING: - { - const char *key; - - r = sd_netlink_message_read_string(m, type_system_union->match, &key); - if (r < 0) - return r; - - r = type_system_union_get_type_system(type_system_union, - &type_system, - key); - if (r < 0) - return r; - - break; - } - case NL_MATCH_PROTOCOL: - { - int family; - - r = sd_rtnl_message_get_family(m, &family); - if (r < 0) - return r; - - r = type_system_union_protocol_get_type_system(type_system_union, - &type_system, - family); - if (r < 0) - return r; - - break; - } - default: - assert_not_reached("sd-netlink: invalid type system union type"); - } - } else - return -EINVAL; - - r = netlink_message_read_internal(m, type_id, &container, NULL); - if (r < 0) - return r; - else - size = (size_t)r; - - m->n_containers++; - - r = netlink_container_parse(m, - &m->containers[m->n_containers], - type_system_get_count(type_system), - container, - size); - if (r < 0) { - m->n_containers--; - return r; - } - - m->containers[m->n_containers].type_system = type_system; - - return 0; -} - -int sd_netlink_message_exit_container(sd_netlink_message *m) { - assert_return(m, -EINVAL); - assert_return(m->sealed, -EINVAL); - assert_return(m->n_containers > 0, -EINVAL); - - m->containers[m->n_containers].attributes = mfree(m->containers[m->n_containers].attributes); - m->containers[m->n_containers].type_system = NULL; - - m->n_containers--; - - return 0; -} - -uint32_t rtnl_message_get_serial(sd_netlink_message *m) { - assert(m); - assert(m->hdr); - - return m->hdr->nlmsg_seq; -} - -int sd_netlink_message_is_error(sd_netlink_message *m) { - assert_return(m, 0); - assert_return(m->hdr, 0); - - return m->hdr->nlmsg_type == NLMSG_ERROR; -} - -int sd_netlink_message_get_errno(sd_netlink_message *m) { - struct nlmsgerr *err; - - assert_return(m, -EINVAL); - assert_return(m->hdr, -EINVAL); - - if (!sd_netlink_message_is_error(m)) - return 0; - - err = NLMSG_DATA(m->hdr); - - return err->error; -} - -int sd_netlink_message_rewind(sd_netlink_message *m) { - const NLType *nl_type; - uint16_t type; - size_t size; - unsigned i; - int r; - - assert_return(m, -EINVAL); - - /* don't allow appending to message once parsed */ - if (!m->sealed) - rtnl_message_seal(m); - - for (i = 1; i <= m->n_containers; i++) - m->containers[i].attributes = mfree(m->containers[i].attributes); - - m->n_containers = 0; - - if (m->containers[0].attributes) - /* top-level attributes have already been parsed */ - return 0; - - assert(m->hdr); - - r = type_system_get_type(&type_system_root, &nl_type, m->hdr->nlmsg_type); - if (r < 0) - return r; - - type = type_get_type(nl_type); - size = type_get_size(nl_type); - - if (type == NETLINK_TYPE_NESTED) { - const NLTypeSystem *type_system; - - type_get_type_system(nl_type, &type_system); - - m->containers[0].type_system = type_system; - - r = netlink_container_parse(m, - &m->containers[m->n_containers], - type_system_get_count(type_system), - (struct rtattr*)((uint8_t*)NLMSG_DATA(m->hdr) + NLMSG_ALIGN(size)), - NLMSG_PAYLOAD(m->hdr, size)); - if (r < 0) - return r; - } - - return 0; -} - -void rtnl_message_seal(sd_netlink_message *m) { - assert(m); - assert(!m->sealed); - - m->sealed = true; -} - -sd_netlink_message *sd_netlink_message_next(sd_netlink_message *m) { - assert_return(m, NULL); - - return m->next; -} |