***/
#include <netinet/in.h>
-#include <netinet/ether.h>
#include <stdbool.h>
#include <unistd.h>
assert_return(ret, -EINVAL);
- /* Note that 'rtnl' is curretly unused, if we start using it internally
+ /* Note that 'rtnl' is currently unused, if we start using it internally
we must take care to avoid problems due to mutual references between
busses and their queued messages. See sd-bus.
*/
if (r < 0)
return r;
- assert(nl_type->type == NLA_NESTED);
-
r = message_new_empty(rtnl, &m);
if (r < 0)
return r;
return 0;
}
+int sd_rtnl_message_route_set_src_prefixlen(sd_rtnl_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_rtnl_message *m, unsigned char scope) {
struct rtmsg *rtm;
return 0;
}
+int sd_rtnl_message_route_get_dst_prefixlen(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_prefixlen(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, int rtm_family,
unsigned char rtm_protocol) {
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);
return 0;
}
+int sd_rtnl_message_neigh_set_flags(sd_rtnl_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_rtnl_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_rtnl_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_rtnl_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_rtnl_message *m, int *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(ndm_family == AF_INET ||
+ ndm_family == AF_INET6 ||
+ ndm_family == PF_BRIDGE, -EINVAL);
assert_return(ret, -EINVAL);
r = message_new(rtnl, ret, nlmsg_type);
}
sd_rtnl_message *sd_rtnl_message_unref(sd_rtnl_message *m) {
- if (m && REFCNT_DEC(m->n_ref) <= 0) {
+ if (m && REFCNT_DEC(m->n_ref) == 0) {
unsigned i;
free(m->hdr);
return 0;
}
+int sd_rtnl_message_get_family(sd_rtnl_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;
+ }
+
+ return -EOPNOTSUPP;
+}
+
int sd_rtnl_message_is_broadcast(sd_rtnl_message *m) {
assert_return(m, -EINVAL);
- return !m->hdr->nlmsg_pid;
+ return m->broadcast;
}
int sd_rtnl_message_link_get_ifindex(sd_rtnl_message *m, int *ifindex) {
size = (size_t)r;
if (size) {
- length = strnlen(data, size);
- if (length >= size)
+ length = strnlen(data, size+1);
+ if (length > size)
return -EINVAL;
} else
length = strlen(data);
assert_return(m->n_containers < RTNL_CONTAINER_DEPTH, -ERANGE);
r = message_attribute_has_type(m, type, NLA_NESTED);
- if (r < 0)
- return r;
- else
+ if (r < 0) {
+ const NLTypeSystemUnion *type_system_union;
+ int family;
+
+ r = message_attribute_has_type(m, type, NLA_UNION);
+ if (r < 0)
+ return r;
+ size = (size_t) r;
+
+ r = sd_rtnl_message_get_family(m, &family);
+ if (r < 0)
+ return r;
+
+ 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_protocol_get_type_system(type_system_union,
+ &m->container_type_system[m->n_containers + 1],
+ family);
+ if (r < 0)
+ return r;
+ } else {
size = (size_t)r;
- 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;
+ 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;
+ }
r = add_rtattr(m, type | NLA_F_NESTED, NULL, size);
if (r < 0)
return r;
} else if (nl_type->type == NLA_UNION) {
const NLTypeSystemUnion *type_system_union;
- const char *key;
r = type_system_get_type_system_union(m->container_type_system[m->n_containers],
&type_system_union,
if (r < 0)
return r;
- r = sd_rtnl_message_read_string(m, type_system_union->match, &key);
- if (r < 0)
- return r;
+ switch (type_system_union->match_type) {
+ case NL_MATCH_SIBLING:
+ {
+ const char *key;
- r = type_system_union_get_type_system(type_system_union,
- &type_system,
- key);
- 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;
+
+ 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-rtnl: invalid type system union type");
+ }
} else
return -EINVAL;
return m->hdr->nlmsg_seq;
}
+int sd_rtnl_message_is_error(sd_rtnl_message *m) {
+ assert_return(m, 0);
+ assert_return(m->hdr, 0);
+
+ return m->hdr->nlmsg_type == NLMSG_ERROR;
+}
+
int sd_rtnl_message_get_errno(sd_rtnl_message *m) {
struct nlmsgerr *err;
assert_return(m, -EINVAL);
assert_return(m->hdr, -EINVAL);
- if (m->hdr->nlmsg_type != NLMSG_ERROR)
+ if (!sd_rtnl_message_is_error(m))
return 0;
err = NLMSG_DATA(m->hdr);
/* no data */
if (errno == ENOBUFS)
log_debug("rtnl: kernel receive buffer overrun");
+ else if (errno == EAGAIN)
+ log_debug("rtnl: no data in socket");
- return (errno == EAGAIN) ? 0 : -errno;
- } else if (r == 0)
- /* connection was closed by the kernel */
- return -ECONNRESET;
+ return (errno == EAGAIN || errno == EINTR) ? 0 : -errno;
+ }
for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
if (cmsg->cmsg_level == SOL_SOCKET &&
struct ucred *ucred = (void *)CMSG_DATA(cmsg);
/* from the kernel */
- if (ucred->uid == 0 && ucred->pid == 0)
+ if (ucred->pid == 0)
auth = true;
+ else
+ log_debug("rtnl: ignoring message from PID "PID_FMT, ucred->pid);
} else if (cmsg->cmsg_level == SOL_NETLINK &&
cmsg->cmsg_type == NETLINK_PKTINFO &&
cmsg->cmsg_len == CMSG_LEN(sizeof(struct nl_pktinfo))) {
}
}
- if (!auth)
+ if (!auth) {
/* not from the kernel, ignore */
+ if (peek) {
+ /* drop the message */
+ r = recvmsg(fd, &msg, 0);
+ if (r < 0)
+ return (errno == EAGAIN || errno == EINTR) ? 0 : -errno;
+ }
+
return 0;
+ }
- if (group)
+ if (_group)
*_group = group;
return r;
assert(rtnl->rbuffer_allocated >= sizeof(struct nlmsghdr));
/* read nothing, just get the pending message size */
- r = socket_recv_message(rtnl->fd, &iov, &group, true);
+ r = socket_recv_message(rtnl->fd, &iov, NULL, true);
if (r <= 0)
return r;
else
}
}
- for (new_msg = rtnl->rbuffer; NLMSG_OK(new_msg, len); new_msg = NLMSG_NEXT(new_msg, len)) {
+ for (new_msg = rtnl->rbuffer; NLMSG_OK(new_msg, len) && !done; new_msg = NLMSG_NEXT(new_msg, len)) {
_cleanup_rtnl_message_unref_ sd_rtnl_message *m = NULL;
const NLType *nl_type;
if (new_msg->nlmsg_type == NLMSG_DONE) {
/* finished reading multi-part message */
done = true;
- break;
+
+ continue;
}
/* check that we support this message type */
r = type_system_get_type(NULL, &nl_type, new_msg->nlmsg_type);
if (r < 0) {
- if (r == -ENOTSUP)
- log_debug("sd-rtnl: ignored message with unknown type: %u",
+ if (r == -EOPNOTSUPP)
+ log_debug("sd-rtnl: ignored message with unknown type: %i",
new_msg->nlmsg_type);
continue;
if (r < 0)
return r;
+ m->broadcast = !!group;
+
m->hdr = memdup(new_msg, new_msg->nlmsg_len);
if (!m->hdr)
return -ENOMEM;
~ianmdlvl / elogind.git / blobdiff