#include <netinet/ether.h>
#include <stdbool.h>
#include <unistd.h>
+#include <linux/netlink.h>
#include <linux/veth.h>
#include <linux/if.h>
#include <linux/ip.h>
#include "sd-rtnl.h"
#include "rtnl-util.h"
#include "rtnl-internal.h"
+#include "rtnl-types.h"
#define GET_CONTAINER(m, i) ((i) < (m)->n_containers ? (struct rtattr*)((uint8_t*)(m)->hdr + (m)->container_offsets[i]) : NULL)
#define PUSH_CONTAINER(m, new) (m)->container_offsets[(m)->n_containers ++] = (uint8_t*)(new) - (uint8_t*)(m)->hdr;
-int message_new(sd_rtnl *rtnl, sd_rtnl_message **ret, size_t initial_size) {
+static int message_new_empty(sd_rtnl *rtnl, sd_rtnl_message **ret, size_t initial_size) {
sd_rtnl_message *m;
assert_return(ret, -EINVAL);
return 0;
}
+int message_new(sd_rtnl *rtnl, sd_rtnl_message **ret, uint16_t type) {
+ const NLType *nl_type;
+ size_t size;
+ int r;
+
+ r = type_system_get_type(NULL, &nl_type, type);
+ if (r < 0)
+ return r;
+
+ assert(nl_type->type == NLA_NESTED);
+
+ size = NLMSG_SPACE(nl_type->size);
+
+ r = message_new_empty(rtnl, ret, size);
+ if (r < 0)
+ return r;
+
+ (*ret)->container_type_system[0] = nl_type->type_system;
+ (*ret)->hdr->nlmsg_len = size;
+ (*ret)->hdr->nlmsg_type = type;
+
+ return 0;
+}
+
int sd_rtnl_message_route_set_dst_prefixlen(sd_rtnl_message *m, unsigned char prefixlen) {
struct rtmsg *rtm;
assert_return(rtm_family == AF_INET || rtm_family == AF_INET6, -EINVAL);
assert_return(ret, -EINVAL);
- r = message_new(rtnl, ret, NLMSG_SPACE(sizeof(struct rtmsg)));
+ r = message_new(rtnl, ret, nlmsg_type);
if (r < 0)
return r;
- (*ret)->hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
- (*ret)->hdr->nlmsg_type = nlmsg_type;
if (nlmsg_type == RTM_NEWROUTE)
(*ret)->hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_EXCL;
assert_return(nlmsg_type != RTM_DELLINK || index > 0, -EINVAL);
assert_return(ret, -EINVAL);
- r = message_new(rtnl, ret, NLMSG_SPACE(sizeof(struct ifinfomsg)));
+ r = message_new(rtnl, ret, nlmsg_type);
if (r < 0)
return r;
- (*ret)->hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
- (*ret)->hdr->nlmsg_type = nlmsg_type;
if (nlmsg_type == RTM_NEWLINK)
(*ret)->hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_EXCL;
assert_return(family == AF_INET || family == AF_INET6, -EINVAL);
assert_return(ret, -EINVAL);
- r = message_new(rtnl, ret, NLMSG_SPACE(sizeof(struct ifaddrmsg)));
+ r = message_new(rtnl, ret, nlmsg_type);
if (r < 0)
return r;
- (*ret)->hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
- (*ret)->hdr->nlmsg_type = nlmsg_type;
if (nlmsg_type == RTM_GETADDR && family == AF_INET)
(*ret)->hdr->nlmsg_flags |= NLM_F_DUMP;
free(m->hdr);
- for (i = 0; i < m->n_containers; i++)
+ for (i = 0; i <= m->n_containers; i++)
free(m->rta_offset_tb[i]);
free(m);
rta->rta_type = type;
rta->rta_len = rta_length;
if (!data) {
+ //TODO: simply return this value rather than check for !data
/* this is the start of a new container */
m->container_offsets[m->n_containers ++] = m->hdr->nlmsg_len;
} else {
return 0;
}
+static int message_attribute_has_type(sd_rtnl_message *m, uint16_t attribute_type, uint16_t data_type) {
+ const NLType *type;
+ int r;
+
+ r = type_system_get_type(m->container_type_system[m->n_containers], &type, attribute_type);
+ if (r < 0)
+ return r;
+
+ if (type->type != data_type)
+ return -EINVAL;
+
+ return type->size;
+}
+
int sd_rtnl_message_append_string(sd_rtnl_message *m, unsigned short type, const char *data) {
- uint16_t rtm_type;
+ size_t length, size;
int r;
assert_return(m, -EINVAL);
assert_return(!m->sealed, -EPERM);
assert_return(data, -EINVAL);
- r = sd_rtnl_message_get_type(m, &rtm_type);
+ r = message_attribute_has_type(m, type, NLA_STRING);
if (r < 0)
return r;
+ else
+ size = (size_t)r;
- /* check that the type is correct */
- switch (rtm_type) {
- case RTM_NEWLINK:
- case RTM_SETLINK:
- case RTM_GETLINK:
- case RTM_DELLINK:
- if (m->n_containers == 1) {
- if (GET_CONTAINER(m, 0)->rta_type != IFLA_LINKINFO ||
- type != IFLA_INFO_KIND)
- return -ENOTSUP;
- } else {
- switch (type) {
- case IFLA_IFNAME:
- case IFLA_IFALIAS:
- case IFLA_QDISC:
- break;
- default:
- return -ENOTSUP;
- }
- }
- break;
- case RTM_NEWADDR:
- case RTM_GETADDR:
- case RTM_DELADDR:
- if (type != IFA_LABEL)
- return -ENOTSUP;
- break;
- default:
- return -ENOTSUP;
- }
+ if (size) {
+ length = strnlen(data, size);
+ if (length >= size)
+ return -EINVAL;
+ } else
+ length = strlen(data);
- r = add_rtattr(m, type, data, strlen(data) + 1);
+ r = add_rtattr(m, type, data, length + 1);
if (r < 0)
return r;
}
int sd_rtnl_message_append_u8(sd_rtnl_message *m, unsigned short type, uint8_t data) {
- uint16_t rtm_type;
int r;
assert_return(m, -EINVAL);
assert_return(!m->sealed, -EPERM);
- r = sd_rtnl_message_get_type(m, &rtm_type);
+ r = message_attribute_has_type(m, type, NLA_U8);
if (r < 0)
return r;
- switch (rtm_type) {
- case RTM_NEWLINK:
- case RTM_SETLINK:
- case RTM_GETLINK:
- case RTM_DELLINK:
- switch (type) {
- case IFLA_CARRIER:
- case IFLA_OPERSTATE:
- case IFLA_LINKMODE:
- case IFLA_IPTUN_TTL:
- case IFLA_IPTUN_TOS:
- case IFLA_IPTUN_PROTO:
- case IFLA_IPTUN_PMTUDISC:
- case IFLA_IPTUN_ENCAP_LIMIT:
- case IFLA_GRE_TTL:
- break;
- default:
- return -ENOTSUP;
- }
-
- break;
- default:
- return -ENOTSUP;
- }
-
r = add_rtattr(m, type, &data, sizeof(uint8_t));
if (r < 0)
return r;
int sd_rtnl_message_append_u16(sd_rtnl_message *m, unsigned short type, uint16_t data) {
- uint16_t rtm_type;
int r;
assert_return(m, -EINVAL);
assert_return(!m->sealed, -EPERM);
- r = sd_rtnl_message_get_type(m, &rtm_type);
+ r = message_attribute_has_type(m, type, NLA_U16);
if (r < 0)
return r;
- /* check that the type is correct */
- switch (rtm_type) {
- case RTM_NEWLINK:
- case RTM_SETLINK:
- case RTM_GETLINK:
- case RTM_DELLINK:
- if (m->n_containers == 2 &&
- GET_CONTAINER(m, 0)->rta_type == IFLA_LINKINFO &&
- GET_CONTAINER(m, 1)->rta_type == IFLA_INFO_DATA) {
- switch (type) {
- case IFLA_VLAN_ID:
- case IFLA_IPTUN_FLAGS:
- case IFLA_GRE_IFLAGS:
- case IFLA_GRE_OFLAGS:
- case IFLA_IPTUN_6RD_PREFIXLEN:
- case IFLA_IPTUN_6RD_RELAY_PREFIXLEN:
- break;
- default:
- return -ENOTSUP;
- }
- } else
- return -ENOTSUP;
-
- break;
- default:
- return -ENOTSUP;
- }
-
r = add_rtattr(m, type, &data, sizeof(uint16_t));
if (r < 0)
return r;
}
int sd_rtnl_message_append_u32(sd_rtnl_message *m, unsigned short type, uint32_t data) {
- uint16_t rtm_type;
int r;
assert_return(m, -EINVAL);
assert_return(!m->sealed, -EPERM);
- r = sd_rtnl_message_get_type(m, &rtm_type);
+ r = message_attribute_has_type(m, type, NLA_U32);
if (r < 0)
return r;
- /* check that the type is correct */
- switch (rtm_type) {
- case RTM_NEWLINK:
- case RTM_SETLINK:
- case RTM_GETLINK:
- case RTM_DELLINK:
- switch (type) {
- case IFLA_MASTER:
- case IFLA_MTU:
- case IFLA_LINK:
- case IFLA_GROUP:
- case IFLA_TXQLEN:
- case IFLA_WEIGHT:
- case IFLA_NET_NS_FD:
- case IFLA_NET_NS_PID:
- case IFLA_PROMISCUITY:
- case IFLA_NUM_TX_QUEUES:
- case IFLA_NUM_RX_QUEUES:
- case IFLA_IPTUN_LOCAL:
- case IFLA_IPTUN_REMOTE:
- case IFLA_MACVLAN_MODE:
- case IFLA_IPTUN_FLAGS:
- case IFLA_IPTUN_FLOWINFO:
- case IFLA_GRE_FLOWINFO:
- break;
- default:
- return -ENOTSUP;
- }
- break;
- case RTM_NEWROUTE:
- case RTM_GETROUTE:
- case RTM_DELROUTE:
- switch (type) {
- case RTA_TABLE:
- case RTA_PRIORITY:
- case RTA_IIF:
- case RTA_OIF:
- case RTA_MARK:
- break;
- default:
- return -ENOTSUP;
- }
- break;
- default:
- return -ENOTSUP;
- }
-
r = add_rtattr(m, type, &data, sizeof(uint32_t));
if (r < 0)
return r;
}
int sd_rtnl_message_append_in_addr(sd_rtnl_message *m, unsigned short type, const struct in_addr *data) {
- struct ifaddrmsg *ifa;
- struct rtmsg *rtm;
- uint16_t rtm_type;
int r;
assert_return(m, -EINVAL);
assert_return(!m->sealed, -EPERM);
assert_return(data, -EINVAL);
- r = sd_rtnl_message_get_type(m, &rtm_type);
+ r = message_attribute_has_type(m, type, NLA_IN_ADDR);
if (r < 0)
return r;
- /* check that the type is correct */
- switch (rtm_type) {
- case RTM_NEWADDR:
- case RTM_GETADDR:
- case RTM_DELADDR:
- switch (type) {
- case IFA_ADDRESS:
- case IFA_LOCAL:
- case IFA_BROADCAST:
- case IFA_ANYCAST:
- case IFLA_GRE_LOCAL:
- case IFLA_GRE_REMOTE:
- ifa = NLMSG_DATA(m->hdr);
-
- if (ifa->ifa_family != AF_INET)
- return -EINVAL;
-
- break;
- default:
- return -ENOTSUP;
- }
- break;
- case RTM_NEWROUTE:
- case RTM_GETROUTE:
- case RTM_DELROUTE:
- switch (type) {
- case RTA_DST:
- case RTA_SRC:
- case RTA_GATEWAY:
- rtm = NLMSG_DATA(m->hdr);
-
- if (rtm->rtm_family != AF_INET)
- return -EINVAL;
-
- break;
- default:
- return -ENOTSUP;
- }
- break;
- default:
- return -ENOTSUP;
- }
-
r = add_rtattr(m, type, data, sizeof(struct in_addr));
if (r < 0)
return r;
}
int sd_rtnl_message_append_in6_addr(sd_rtnl_message *m, unsigned short type, const struct in6_addr *data) {
- struct ifaddrmsg *ifa;
- struct rtmsg *rtm;
- uint16_t rtm_type;
int r;
assert_return(m, -EINVAL);
assert_return(!m->sealed, -EPERM);
assert_return(data, -EINVAL);
- r = sd_rtnl_message_get_type(m, &rtm_type);
+ r = message_attribute_has_type(m, type, NLA_IN_ADDR);
if (r < 0)
return r;
- /* check that the type is correct */
- switch (rtm_type) {
- case RTM_NEWADDR:
- case RTM_GETADDR:
- case RTM_DELADDR:
- switch (type) {
- case IFA_ADDRESS:
- case IFA_LOCAL:
- case IFA_BROADCAST:
- case IFA_ANYCAST:
- case IFLA_GRE_LOCAL:
- case IFLA_GRE_REMOTE:
- case IFLA_IPTUN_6RD_PREFIX:
- ifa = NLMSG_DATA(m->hdr);
-
- if (ifa->ifa_family != AF_INET6)
- return -EINVAL;
-
- break;
- default:
- return -ENOTSUP;
- }
- break;
- case RTM_NEWROUTE:
- case RTM_GETROUTE:
- case RTM_DELROUTE:
- switch (type) {
- case RTA_DST:
- case RTA_SRC:
- case RTA_GATEWAY:
- rtm = NLMSG_DATA(m->hdr);
-
- if (rtm->rtm_family != AF_INET6)
- return -EINVAL;
-
- break;
- default:
- return -ENOTSUP;
- }
- default:
- return -ENOTSUP;
- }
-
r = add_rtattr(m, type, data, sizeof(struct in6_addr));
if (r < 0)
return r;
}
int sd_rtnl_message_append_ether_addr(sd_rtnl_message *m, unsigned short type, const struct ether_addr *data) {
- uint16_t rtm_type;
int r;
assert_return(m, -EINVAL);
assert_return(!m->sealed, -EPERM);
assert_return(data, -EINVAL);
- sd_rtnl_message_get_type(m, &rtm_type);
-
- switch (rtm_type) {
- case RTM_NEWLINK:
- case RTM_SETLINK:
- case RTM_DELLINK:
- case RTM_GETLINK:
- switch (type) {
- case IFLA_ADDRESS:
- case IFLA_BROADCAST:
- break;
- default:
- return -ENOTSUP;
- }
- break;
- default:
- return -ENOTSUP;
- }
+ r = message_attribute_has_type(m, type, NLA_ETHER_ADDR);
+ if (r < 0)
+ return r;
r = add_rtattr(m, type, data, ETH_ALEN);
if (r < 0)
}
int sd_rtnl_message_open_container(sd_rtnl_message *m, unsigned short type) {
- uint16_t rtm_type;
+ size_t size;
+ int r;
assert_return(m, -EINVAL);
assert_return(!m->sealed, -EPERM);
- sd_rtnl_message_get_type(m, &rtm_type);
+ r = message_attribute_has_type(m, type, NLA_NESTED);
+ if (r < 0)
+ return r;
+ else
+ size = (size_t)r;
- if (rtnl_message_type_is_link(rtm_type)) {
+ r = type_system_get_type_system(m->container_type_system[m->n_containers],
+ &m->container_type_system[m->n_containers + 1],
+ type);
+ if (r < 0)
+ return r;
- if ((type == IFLA_LINKINFO && m->n_containers == 0) ||
- (type == IFLA_INFO_DATA && m->n_containers == 1 &&
- GET_CONTAINER(m, 0)->rta_type == IFLA_LINKINFO))
- return add_rtattr(m, type, NULL, 0);
- else if (type == VETH_INFO_PEER && m->n_containers == 2 &&
- GET_CONTAINER(m, 1)->rta_type == IFLA_INFO_DATA &&
- GET_CONTAINER(m, 0)->rta_type == IFLA_LINKINFO)
- return add_rtattr(m, type, NULL, sizeof(struct ifinfomsg));
- }
+ r = add_rtattr(m, type, NULL, size);
+ if (r < 0)
+ return r;
- return -ENOTSUP;
+ return 0;
}
+int sd_rtnl_message_open_container_union(sd_rtnl_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->container_type_system[m->n_containers], &type_system_union, type);
+ if (r < 0)
+ return r;
+
+ r = type_system_union_get_type_system(type_system_union,
+ &m->container_type_system[m->n_containers + 1],
+ key);
+ if (r < 0)
+ return r;
+
+ r = sd_rtnl_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, NULL, 0);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+
int sd_rtnl_message_close_container(sd_rtnl_message *m) {
assert_return(m, -EINVAL);
assert_return(!m->sealed, -EPERM);
assert_return(m->n_containers > 0, -EINVAL);
+ m->container_type_system[m->n_containers] = NULL;
m->n_containers --;
return 0;
assert_return(m, -EINVAL);
assert_return(m->sealed, -EPERM);
assert_return(data, -EINVAL);
- assert_return(m->rta_offset_tb[m->n_containers], -EINVAL);
- assert_return(type < m->rta_tb_size[m->n_containers], -EINVAL);
+ assert(m->n_containers <= RTNL_CONTAINER_DEPTH);
+ assert(m->rta_offset_tb[m->n_containers]);
+ assert(type < m->rta_tb_size[m->n_containers]);
if(!m->rta_offset_tb[m->n_containers][type])
return -ENODATA;
int r;
void *attr_data;
- assert_return(data, -EINVAL);
+ r = message_attribute_has_type(m, type, NLA_STRING);
+ if (r < 0)
+ return r;
r = rtnl_message_read_internal(m, type, &attr_data);
if (r < 0)
int r;
void *attr_data;
- assert_return(data, -EINVAL);
+ r = message_attribute_has_type(m, type, NLA_U8);
+ if (r < 0)
+ return r;
r = rtnl_message_read_internal(m, type, &attr_data);
if (r < 0)
int r;
void *attr_data;
- assert_return(data, -EINVAL);
+ r = message_attribute_has_type(m, type, NLA_U16);
+ if (r < 0)
+ return r;
r = rtnl_message_read_internal(m, type, &attr_data);
if (r < 0)
int r;
void *attr_data;
- assert_return(data, -EINVAL);
+ r = message_attribute_has_type(m, type, NLA_U32);
+ if (r < 0)
+ return r;
r = rtnl_message_read_internal(m, type, &attr_data);
if (r < 0)
int r;
void *attr_data;
- assert_return(data, -EINVAL);
+ r = message_attribute_has_type(m, type, NLA_ETHER_ADDR);
+ if (r < 0)
+ return r;
r = rtnl_message_read_internal(m, type, &attr_data);
if (r < 0)
int r;
void *attr_data;
- assert_return(data, -EINVAL);
+ r = message_attribute_has_type(m, type, NLA_IN_ADDR);
+ if (r < 0)
+ return r;
r = rtnl_message_read_internal(m, type, &attr_data);
if (r < 0)
int r;
void *attr_data;
- assert_return(data, -EINVAL);
+ r = message_attribute_has_type(m, type, NLA_IN_ADDR);
+ if (r < 0)
+ return r;
r = rtnl_message_read_internal(m, type, &attr_data);
if (r < 0)
}
int sd_rtnl_message_enter_container(sd_rtnl_message *m, unsigned short type) {
- uint16_t rtm_type;
- unsigned short parent_type;
+ const NLType *nl_type;
+ const NLTypeSystem *type_system;
void *container;
- size_t container_length;
- int max, r;
+ size_t size;
+ int r;
assert_return(m, -EINVAL);
assert_return(m->n_containers < RTNL_CONTAINER_DEPTH, -EINVAL);
- r = rtnl_message_read_internal(m, type, &container);
+ r = type_system_get_type(m->container_type_system[m->n_containers],
+ &nl_type,
+ type);
if (r < 0)
return r;
- else
- container_length = r;
- r = sd_rtnl_message_get_type(m, &rtm_type);
+ if (nl_type->type == NLA_NESTED) {
+ r = type_system_get_type_system(m->container_type_system[m->n_containers],
+ &type_system,
+ type);
+ if (r < 0)
+ return r;
+ } else if (nl_type->type == NLA_UNION) {
+ const NLTypeSystemUnion *type_system_union;
+ char *key;
+
+ r = type_system_get_type_system_union(m->container_type_system[m->n_containers],
+ &type_system_union,
+ type);
+ if (r < 0)
+ return r;
+
+ r = sd_rtnl_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;
+ } else
+ return -EINVAL;
+
+ r = rtnl_message_read_internal(m, type, &container);
if (r < 0)
return r;
+ else
+ size = (size_t)r;
- if (rtnl_message_type_is_link(rtm_type)) {
- switch (m->n_containers) {
- case 0:
- switch (type) {
- case IFLA_LINKINFO:
- max = IFLA_INFO_MAX;
- break;
- default:
- return -ENOTSUP;
- }
- break;
- case 1:
- parent_type = GET_CONTAINER(m, 0)->rta_type;
- switch (parent_type) {
- case IFLA_LINKINFO:
- switch (type) {
- case IFLA_INFO_DATA: {
- char *kind;
-
- r = sd_rtnl_message_read_string(m, IFLA_INFO_KIND, &kind);
- if (r < 0)
- return r;
-
- if (streq(kind, "vlan")) {
- max = IFLA_VLAN_MAX;
- } else if (streq(kind, "bridge")) {
- max = IFLA_BRIDGE_MAX;
- } else if (streq(kind, "veth")) {
- max = VETH_INFO_MAX;
- container = IFLA_RTA(container);
- } else
- return -ENOTSUP;
-
- break;
- }
- default:
- return -ENOTSUP;
- }
- break;
- default:
- return -ENOTSUP;
- }
- break;
- default:
- return -ENOTSUP;
- }
- } else
- return -ENOTSUP;
+ m->n_containers ++;
r = rtnl_message_parse(m,
- &m->rta_offset_tb[m->n_containers + 1],
- &m->rta_tb_size[m->n_containers + 1],
- max,
+ &m->rta_offset_tb[m->n_containers],
+ &m->rta_tb_size[m->n_containers],
+ type_system->max,
container,
- container_length);
- if (r < 0)
+ size);
+ if (r < 0) {
+ m->n_containers --;
return r;
+ }
- m->n_containers ++;
+ m->container_type_system[m->n_containers] = type_system;
return 0;
}
free(m->rta_offset_tb[m->n_containers]);
m->rta_offset_tb[m->n_containers] = NULL;
+ m->container_type_system[m->n_containers] = NULL;
m->n_containers --;
for (; RTA_OK(rta, rt_len); rta = RTA_NEXT(rta, rt_len)) {
type = rta->rta_type;
- if (type > max) {
- log_debug("rtnl: message parse - ignore out of range attribute type");
+ /* if the kernel is newer than the headers we used
+ when building, we ignore out-of-range attributes
+ */
+ if (type > max)
continue;
- }
if (tb[type])
log_debug("rtnl: message parse - overwriting repeated attribute");
*/
int socket_read_message(sd_rtnl *nl, sd_rtnl_message **ret) {
_cleanup_rtnl_message_unref_ sd_rtnl_message *m = NULL;
+ const NLType *nl_type;
struct nlmsghdr *new_hdr;
union {
struct sockaddr sa;
if (r < 0)
return r;
- r = message_new(nl, &m, need);
+ r = message_new_empty(nl, &m, need);
if (r < 0)
return r;
else
len = (size_t) r;
- /* check that the size matches the message type */
- switch (m->hdr->nlmsg_type) {
-
- case NLMSG_ERROR:
- if (len < NLMSG_LENGTH(sizeof(struct nlmsgerr)))
- return -EIO;
- break;
+ /* silently drop noop messages */
+ if (m->hdr->nlmsg_type == NLMSG_NOOP)
+ return 0;
- case RTM_NEWLINK:
- case RTM_SETLINK:
- case RTM_DELLINK:
- case RTM_GETLINK:
- if (len < NLMSG_LENGTH(sizeof(struct ifinfomsg)))
- return -EIO;
- break;
+ /* check that we support this message type */
+ r = type_system_get_type(NULL, &nl_type, m->hdr->nlmsg_type);
+ if (r < 0) {
+ if (r == -ENOTSUP)
+ log_debug("sd-rtnl: ignored message with unknown type: %u",
+ m->hdr->nlmsg_type);
- case RTM_NEWADDR:
- case RTM_DELADDR:
- case RTM_GETADDR:
- if (len < NLMSG_LENGTH(sizeof(struct ifaddrmsg)))
- return -EIO;
- break;
- case RTM_NEWROUTE:
- case RTM_DELROUTE:
- case RTM_GETROUTE:
- if (len < NLMSG_LENGTH(sizeof(struct rtmsg)))
- return -EIO;
- break;
- case NLMSG_NOOP:
- return 0;
- default:
- log_debug("sd-rtnl: ignored message with unknown type");
return 0;
}
+ /* check that the size matches the message type */
+ if (len < NLMSG_LENGTH(nl_type->size))
+ return -EIO;
+
/* we probably allocated way too much memory, give it back */
new_hdr = realloc(m->hdr, len);
if (!new_hdr)
}
int sd_rtnl_message_rewind(sd_rtnl_message *m) {
- struct ifinfomsg *ifi;
- struct ifaddrmsg *ifa;
- struct rtmsg *rtm;
+ const NLType *type;
unsigned i;
int r;
assert_return(m, -EINVAL);
- assert_return(m->hdr, -EINVAL);
/* don't allow appending to message once parsed */
if (!m->sealed)
free(m->rta_offset_tb[i]);
m->rta_offset_tb[i] = NULL;
m->rta_tb_size[i] = 0;
+ m->container_type_system[i] = NULL;
}
m->n_containers = 0;
return 0;
}
- /* parse top-level attributes */
- switch(m->hdr->nlmsg_type) {
- case NLMSG_NOOP:
- case NLMSG_ERROR:
- break;
- case RTM_NEWLINK:
- case RTM_SETLINK:
- case RTM_GETLINK:
- case RTM_DELLINK:
- ifi = NLMSG_DATA(m->hdr);
-
- r = rtnl_message_parse(m,
- &m->rta_offset_tb[0],
- &m->rta_tb_size[0],
- IFLA_MAX,
- IFLA_RTA(ifi),
- IFLA_PAYLOAD(m->hdr));
- if (r < 0)
- return r;
-
- break;
- case RTM_NEWADDR:
- case RTM_GETADDR:
- case RTM_DELADDR:
- ifa = NLMSG_DATA(m->hdr);
-
- r = rtnl_message_parse(m,
- &m->rta_offset_tb[0],
- &m->rta_tb_size[0],
- IFA_MAX,
- IFA_RTA(ifa),
- IFA_PAYLOAD(m->hdr));
- if (r < 0)
- return r;
-
- break;
- case RTM_NEWROUTE:
- case RTM_GETROUTE:
- case RTM_DELROUTE:
- rtm = NLMSG_DATA(m->hdr);
-
- r = rtnl_message_parse(m,
- &m->rta_offset_tb[0],
- &m->rta_tb_size[0],
- RTA_MAX,
- RTM_RTA(rtm),
- RTM_PAYLOAD(m->hdr));
-
- break;
- default:
- return -ENOTSUP;
+ assert(m->hdr);
+
+ r = type_system_get_type(NULL, &type, m->hdr->nlmsg_type);
+ if (r < 0)
+ return r;
+
+ if (type->type == NLA_NESTED) {
+ const NLTypeSystem *type_system = type->type_system;
+
+ assert(type_system);
+
+ m->container_type_system[0] = type_system;
+
+ r = rtnl_message_parse(m,
+ &m->rta_offset_tb[m->n_containers],
+ &m->rta_tb_size[m->n_containers],
+ type_system->max,
+ (struct rtattr*)((uint8_t*)NLMSG_DATA(m->hdr) +
+ NLMSG_ALIGN(type->size)),
+ NLMSG_PAYLOAD(m->hdr, type->size));
+ if (r < 0)
+ return r;
}
return 0;
~ianmdlvl / elogind.git / blobdiff