#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 <linux/if_tunnel.h>
-#include <linux/if_bridge.h>
#include "util.h"
#include "refcnt.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;
+#define RTA_TYPE(rta) ((rta)->rta_type & NLA_TYPE_MASK)
+
static int message_new_empty(sd_rtnl *rtnl, sd_rtnl_message **ret) {
sd_rtnl_message *m;
return 0;
}
+int sd_rtnl_message_route_get_family(sd_rtnl_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_dst_len(sd_rtnl_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_len(sd_rtnl_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_rtnl *rtnl, sd_rtnl_message **ret,
- uint16_t nlmsg_type, unsigned char rtm_family) {
+ 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(rtm_family == AF_INET || rtm_family == AF_INET6, -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);
rtm->rtm_scope = RT_SCOPE_UNIVERSE;
rtm->rtm_type = RTN_UNICAST;
rtm->rtm_table = RT_TABLE_MAIN;
- rtm->rtm_protocol = RTPROT_BOOT;
+ rtm->rtm_protocol = rtm_protocol;
+
+ return 0;
+}
+
+int sd_rtnl_message_neigh_get_family(sd_rtnl_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_rtnl_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_rtnl *rtnl, sd_rtnl_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(ndm_family == AF_INET || ndm_family == AF_INET6, -EINVAL);
+ assert_return(ret, -EINVAL);
+
+ r = message_new(rtnl, ret, nlmsg_type);
+ if (r < 0)
+ return r;
+
+ if (nlmsg_type == RTM_NEWNEIGH)
+ (*ret)->hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_APPEND;
+
+ ndm = NLMSG_DATA((*ret)->hdr);
+
+ ndm->ndm_family = ndm_family;
+ ndm->ndm_ifindex = index;
return 0;
}
return 0;
}
+int sd_rtnl_message_link_set_family(sd_rtnl_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_rtnl *rtnl, sd_rtnl_message **ret,
uint16_t nlmsg_type, int index) {
struct ifinfomsg *ifi;
int sd_rtnl_message_request_dump(sd_rtnl_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,
+ 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);
if (dump)
return 0;
}
-int sd_rtnl_message_addr_get_family(sd_rtnl_message *m, unsigned char *family) {
+int sd_rtnl_message_addr_get_family(sd_rtnl_message *m, int *family) {
struct ifaddrmsg *ifa;
assert_return(m, -EINVAL);
int sd_rtnl_message_new_addr(sd_rtnl *rtnl, sd_rtnl_message **ret,
uint16_t nlmsg_type, int index,
- unsigned char family) {
+ int family) {
struct ifaddrmsg *ifa;
int r;
}
int sd_rtnl_message_new_addr_update(sd_rtnl *rtnl, sd_rtnl_message **ret,
- int index, unsigned char family) {
+ int index, int family) {
int r;
r = sd_rtnl_message_new_addr(rtnl, ret, RTM_NEWADDR, index, family);
return 0;
}
+int sd_rtnl_message_link_get_type(sd_rtnl_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);
+ assert_return(type, -EINVAL);
+
+ ifi = NLMSG_DATA(m->hdr);
+
+ *type = ifi->ifi_type;
+
+ return 0;
+}
+
/* If successful the updated message will be correctly aligned, if
unsuccessful the old message is untouched. */
static int add_rtattr(sd_rtnl_message *m, unsigned short type, const void *data, size_t data_length) {
/* 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);
- data_length = 0;
}
/* make sure also the padding at the end of the message is initialized */
if (r < 0)
return r;
- r = add_rtattr(m, type, NULL, size);
+ r = add_rtattr(m, type | NLA_F_NESTED, NULL, size);
if (r < 0)
return r;
int r;
void *attr_data;
+ assert_return(m, -EINVAL);
+
r = message_attribute_has_type(m, type, NLA_STRING);
if (r < 0)
return r;
else if (strnlen(attr_data, r) >= (size_t) r)
return -EIO;
- *data = (const char *) attr_data;
+ if (data)
+ *data = (const char *) attr_data;
return 0;
}
int r;
void *attr_data;
+ assert_return(m, -EINVAL);
+
r = message_attribute_has_type(m, type, NLA_U8);
if (r < 0)
return r;
else if ((size_t) r < sizeof(uint8_t))
return -EIO;
- *data = *(uint8_t *) attr_data;
+ if (data)
+ *data = *(uint8_t *) attr_data;
return 0;
}
int r;
void *attr_data;
+ assert_return(m, -EINVAL);
+
r = message_attribute_has_type(m, type, NLA_U16);
if (r < 0)
return r;
else if ((size_t) r < sizeof(uint16_t))
return -EIO;
- *data = *(uint16_t *) attr_data;
+ if (data)
+ *data = *(uint16_t *) attr_data;
return 0;
}
int r;
void *attr_data;
+ assert_return(m, -EINVAL);
+
r = message_attribute_has_type(m, type, NLA_U32);
if (r < 0)
return r;
else if ((size_t)r < sizeof(uint32_t))
return -EIO;
- *data = *(uint32_t *) attr_data;
+ if (data)
+ *data = *(uint32_t *) attr_data;
return 0;
}
int r;
void *attr_data;
+ assert_return(m, -EINVAL);
+
r = message_attribute_has_type(m, type, NLA_ETHER_ADDR);
if (r < 0)
return r;
else if ((size_t)r < sizeof(struct ether_addr))
return -EIO;
- memcpy(data, attr_data, sizeof(struct ether_addr));
+ if (data)
+ memcpy(data, attr_data, sizeof(struct ether_addr));
return 0;
}
int r;
void *attr_data;
+ assert_return(m, -EINVAL);
+
r = message_attribute_has_type(m, type, NLA_CACHE_INFO);
if (r < 0)
return r;
else if ((size_t)r < sizeof(struct ifa_cacheinfo))
return -EIO;
- memcpy(info, attr_data, sizeof(struct ifa_cacheinfo));
+ if (info)
+ memcpy(info, attr_data, sizeof(struct ifa_cacheinfo));
return 0;
}
int r;
void *attr_data;
+ assert_return(m, -EINVAL);
+
r = message_attribute_has_type(m, type, NLA_IN_ADDR);
if (r < 0)
return r;
else if ((size_t)r < sizeof(struct in_addr))
return -EIO;
- memcpy(data, attr_data, sizeof(struct in_addr));
+ if (data)
+ memcpy(data, attr_data, sizeof(struct in_addr));
return 0;
}
int r;
void *attr_data;
+ assert_return(m, -EINVAL);
+
r = message_attribute_has_type(m, type, NLA_IN_ADDR);
if (r < 0)
return r;
else if ((size_t)r < sizeof(struct in6_addr))
return -EIO;
- memcpy(data, attr_data, sizeof(struct in6_addr));
+ if (data)
+ memcpy(data, attr_data, sizeof(struct in6_addr));
return 0;
}
*rta_tb_size = max + 1;
for (; RTA_OK(rta, rt_len); rta = RTA_NEXT(rta, rt_len)) {
- type = rta->rta_type;
+ type = RTA_TYPE(rta);
/* if the kernel is newer than the headers we used
when building, we ignore out-of-range attributes
assert(iov);
r = recvmsg(fd, &msg, MSG_TRUNC | (peek ? MSG_PEEK : 0));
- if (r < 0)
+ if (r < 0) {
/* no data */
+ if (errno == ENOBUFS)
+ log_debug("rtnl: kernel receive buffer overrun");
+
return (errno == EAGAIN) ? 0 : -errno;
- else if (r == 0)
+ } else if (r == 0)
/* connection was closed by the kernel */
return -ECONNRESET;
}
/* check that the size matches the message type */
- if (new_msg->nlmsg_len < NLMSG_LENGTH(nl_type->size))
+ if (new_msg->nlmsg_len < NLMSG_LENGTH(nl_type->size)) {
+ log_debug("sd-rtnl: message larger than expected, dropping");
continue;
+ }
r = message_new_empty(rtnl, &m);
if (r < 0)