struct rtattr *current_container;
struct rtattr *next_rta;
- size_t remaining_size;
bool sealed:1;
};
return 0;
}
+bool message_type_is_route(uint16_t type) {
+ switch (type) {
+ case RTM_NEWROUTE:
+ case RTM_GETROUTE:
+ case RTM_DELROUTE:
+ return true;
+ default:
+ return false;
+ }
+}
+
+bool message_type_is_link(uint16_t type) {
+ switch (type) {
+ case RTM_NEWLINK:
+ case RTM_SETLINK:
+ case RTM_GETLINK:
+ case RTM_DELLINK:
+ return true;
+ default:
+ return false;
+ }
+}
+
+bool message_type_is_addr(uint16_t type) {
+ switch (type) {
+ case RTM_NEWADDR:
+ case RTM_GETADDR:
+ case RTM_DELADDR:
+ return true;
+ default:
+ return false;
+ }
+}
+
+int sd_rtnl_message_route_set_dst_prefixlen(sd_rtnl_message *m, unsigned char prefixlen) {
+ struct rtmsg *rtm;
+
+ rtm = NLMSG_DATA(m->hdr);
+
+ rtm->rtm_dst_len = prefixlen;
+
+ return 0;
+}
+
int sd_rtnl_message_route_new(uint16_t nlmsg_type, unsigned char rtm_family,
- unsigned char rtm_dst_len, unsigned char rtm_src_len,
- unsigned char rtm_tos, unsigned char rtm_table,
- unsigned char rtm_scope, unsigned char rtm_protocol,
- unsigned char rtm_type, unsigned rtm_flags, sd_rtnl_message **ret) {
+ sd_rtnl_message **ret) {
struct rtmsg *rtm;
int r;
- assert_return(nlmsg_type == RTM_NEWROUTE || nlmsg_type == RTM_DELROUTE ||
- nlmsg_type == RTM_GETROUTE, -EINVAL);
+ assert_return(message_type_is_route(nlmsg_type), -EINVAL);
+ assert_return(rtm_family == AF_INET || rtm_family == AF_INET6, -EINVAL);
assert_return(ret, -EINVAL);
r = message_new(ret, NLMSG_SPACE(sizeof(struct rtmsg)));
rtm = NLMSG_DATA((*ret)->hdr);
+ (*ret)->next_rta = RTM_RTA(rtm);
+
rtm->rtm_family = rtm_family;
- rtm->rtm_dst_len = rtm_dst_len;
- rtm->rtm_src_len = rtm_src_len;
- rtm->rtm_tos = rtm_tos;
- rtm->rtm_table = rtm_table;
- rtm->rtm_protocol = rtm_protocol;
- rtm->rtm_scope = rtm_scope;
- rtm->rtm_type = rtm_type;
- rtm->rtm_flags = rtm_flags;
+ rtm->rtm_scope = RT_SCOPE_UNIVERSE;
+ rtm->rtm_type = RTN_UNICAST;
+ rtm->rtm_table = RT_TABLE_MAIN;
+ rtm->rtm_protocol = RTPROT_BOOT;
+
+ return 0;
+}
+
+int sd_rtnl_message_link_set_flags(sd_rtnl_message *m, unsigned flags) {
+ struct ifinfomsg *ifi;
+
+ ifi = NLMSG_DATA(m->hdr);
+
+ ifi->ifi_flags = flags;
+
+ return 0;
+}
+
+int sd_rtnl_message_link_set_type(sd_rtnl_message *m, unsigned type) {
+ struct ifinfomsg *ifi;
+
+ ifi = NLMSG_DATA(m->hdr);
+
+ ifi->ifi_type = type;
return 0;
}
-int sd_rtnl_message_link_new(uint16_t nlmsg_type, int index, unsigned int type, unsigned int flags, sd_rtnl_message **ret) {
+int sd_rtnl_message_link_new(uint16_t nlmsg_type, int index, sd_rtnl_message **ret) {
struct ifinfomsg *ifi;
int r;
- assert_return(nlmsg_type == RTM_NEWLINK || nlmsg_type == RTM_DELLINK ||
- nlmsg_type == RTM_SETLINK || nlmsg_type == RTM_GETLINK, -EINVAL);
+ assert_return(message_type_is_link(nlmsg_type), -EINVAL);
assert_return(nlmsg_type == RTM_NEWLINK || index > 0, -EINVAL);
assert_return(ret, -EINVAL);
ifi->ifi_family = AF_UNSPEC;
ifi->ifi_index = index;
- ifi->ifi_type = type;
- ifi->ifi_flags = flags;
ifi->ifi_change = 0xffffffff;
+ (*ret)->next_rta = IFLA_RTA(ifi);
+
return 0;
}
struct ifaddrmsg *ifa;
int r;
- assert_return(nlmsg_type == RTM_NEWADDR || nlmsg_type == RTM_DELADDR || nlmsg_type == RTM_GETADDR, -EINVAL);
+ assert_return(message_type_is_addr(nlmsg_type), -EINVAL);
assert_return(index > 0, -EINVAL);
assert_return(ret, -EINVAL);
ifa->ifa_scope = scope;
ifa->ifa_index = index;
+ (*ret)->next_rta = IFA_RTA(ifa);
+
return 0;
}
struct ifinfomsg *ifi;
assert_return(m, -EINVAL);
+ assert_return(m->hdr, -EINVAL);
+ assert_return(message_type_is_link(m->hdr->nlmsg_type), -EINVAL);
assert_return(ifindex, -EINVAL);
- assert_return(m->hdr->nlmsg_type == RTM_NEWLINK || m->hdr->nlmsg_type == RTM_DELLINK ||
- m->hdr->nlmsg_type == RTM_GETLINK || m->hdr->nlmsg_type == RTM_SETLINK, -EINVAL);
ifi = NLMSG_DATA(m->hdr);
return 0;
}
+int sd_rtnl_message_link_get_flags(sd_rtnl_message *m, unsigned *flags) {
+ struct ifinfomsg *ifi;
+
+ assert_return(m, -EINVAL);
+ assert_return(m->hdr, -EINVAL);
+ assert_return(message_type_is_link(m->hdr->nlmsg_type), -EINVAL);
+ assert_return(flags, -EINVAL);
+
+ ifi = NLMSG_DATA(m->hdr);
+
+ *flags = ifi->ifi_flags;
+
+ 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) {
new_hdr = realloc(m->hdr, message_length);
if (!new_hdr)
return -ENOMEM;
+ /* update the location of the next rta for reading */
+ m->next_rta = (struct rtattr *) ((uint8_t *) m->next_rta +
+ ((uint8_t *) new_hdr -
+ (uint8_t *) m->hdr));
m->hdr = new_hdr;
/* get pointer to the attribute we are about to add */
/* we are inside a container, extend it */
if (m->current_container)
- m->current_container->rta_len = (unsigned char *) m->hdr +
+ m->current_container->rta_len = (uint8_t *) m->hdr +
m->hdr->nlmsg_len -
- (unsigned char *) m->current_container;
+ (uint8_t *) m->current_container;
/* fill in the attribute */
rta->rta_type = type;
*/
padding = mempcpy(RTA_DATA(rta), data, data_length);
/* make sure also the padding at the end of the message is initialized */
- memset(padding, '\0', (unsigned char *) m->hdr +
+ memset(padding, '\0', (uint8_t *) m->hdr +
m->hdr->nlmsg_len -
- (unsigned char *) padding);
+ (uint8_t *) padding);
}
return 0;
}
-int sd_rtnl_message_append(sd_rtnl_message *m, unsigned short type, const void *data) {
+int sd_rtnl_message_append_string(sd_rtnl_message *m, unsigned short type, const char *data) {
uint16_t rtm_type;
- struct ifaddrmsg *ifa;
- struct rtmsg *rtm;
+ int r;
assert_return(m, -EINVAL);
assert_return(data, -EINVAL);
- sd_rtnl_message_get_type(m, &rtm_type);
+ r = sd_rtnl_message_get_type(m, &rtm_type);
+ if (r < 0)
+ return r;
- if (m->current_container) {
- switch (rtm_type) {
- case RTM_NEWLINK:
- case RTM_SETLINK:
- case RTM_GETLINK:
- case RTM_DELLINK:
- switch (m->current_container->rta_type) {
- case IFLA_LINKINFO:
- switch (type) {
- case IFLA_INFO_KIND:
- return add_rtattr(m, type, data, strlen(data) + 1);
- default:
- return -ENOTSUP;
- }
+ /* check that the type is correct */
+ switch (rtm_type) {
+ case RTM_NEWLINK:
+ case RTM_SETLINK:
+ case RTM_GETLINK:
+ case RTM_DELLINK:
+ if (m->current_container) {
+ if (m->current_container->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;
}
- default:
+ }
+ break;
+ case RTM_NEWADDR:
+ case RTM_GETADDR:
+ case RTM_DELADDR:
+ if (type != IFA_LABEL)
return -ENOTSUP;
- }
+ break;
+ default:
+ return -ENOTSUP;
}
+ r = add_rtattr(m, type, data, strlen(data) + 1);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+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);
+
+ r = sd_rtnl_message_get_type(m, &rtm_type);
+ if (r < 0)
+ return r;
+
+ /* check that the type is correct */
switch (rtm_type) {
case RTM_NEWLINK:
case RTM_SETLINK:
- case RTM_DELLINK:
case RTM_GETLINK:
+ case RTM_DELLINK:
switch (type) {
- case IFLA_IFNAME:
- case IFLA_IFALIAS:
- case IFLA_QDISC:
- return add_rtattr(m, type, data, strlen(data) + 1);
case IFLA_MASTER:
case IFLA_MTU:
case IFLA_LINK:
- return add_rtattr(m, type, data, sizeof(uint32_t));
- case IFLA_STATS:
- return add_rtattr(m, type, data, sizeof(struct rtnl_link_stats));
- case IFLA_ADDRESS:
- case IFLA_BROADCAST:
- return add_rtattr(m, type, data, ETH_ALEN);
+ 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:
+ break;
+ default:
+ return -ENOTSUP;
+ }
+ break;
+ default:
+ return -ENOTSUP;
+ }
+
+ r = add_rtattr(m, type, &data, sizeof(&data));
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+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(data, -EINVAL);
+
+ r = sd_rtnl_message_get_type(m, &rtm_type);
+ if (r < 0)
+ return r;
+
+ /* check that the type is correct */
+ switch (rtm_type) {
case RTM_NEWADDR:
- case RTM_DELADDR:
case RTM_GETADDR:
+ case RTM_DELADDR:
switch (type) {
- case IFA_LABEL:
- return add_rtattr(m, type, data, strlen(data) + 1);
case IFA_ADDRESS:
case IFA_LOCAL:
case IFA_BROADCAST:
case IFA_ANYCAST:
ifa = NLMSG_DATA(m->hdr);
- switch (ifa->ifa_family) {
- case AF_INET:
- return add_rtattr(m, type, data, sizeof(struct in_addr));
- case AF_INET6:
- return add_rtattr(m, type, data, sizeof(struct in6_addr));
- default:
- return -EINVAL;
- }
+
+ 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(data));
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+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(data, -EINVAL);
+
+ r = sd_rtnl_message_get_type(m, &rtm_type);
+ 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:
+ 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);
- switch (rtm->rtm_family) {
- case AF_INET:
- return add_rtattr(m, type, data, sizeof(struct in_addr));
- case AF_INET6:
- return add_rtattr(m, type, data, sizeof(struct in6_addr));
- default:
- return -EINVAL;
- }
- case RTA_TABLE:
- case RTA_PRIORITY:
- case RTA_IIF:
- case RTA_OIF:
- return add_rtattr(m, type, data, sizeof(uint32_t));
+
+ if (rtm->rtm_family != AF_INET6)
+ return -EINVAL;
+
+ break;
default:
return -ENOTSUP;
}
default:
return -ENOTSUP;
}
+
+ r = add_rtattr(m, type, data, sizeof(data));
+ if (r < 0)
+ return r;
+
+ return 0;
}
-int sd_rtnl_message_open_container(sd_rtnl_message *m, unsigned short type) {
+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->current_container, -EINVAL);
+ assert_return(data, -EINVAL);
sd_rtnl_message_get_type(m, &rtm_type);
switch (rtm_type) {
case RTM_NEWLINK:
case RTM_SETLINK:
- case RTM_GETLINK:
case RTM_DELLINK:
- if (type == IFLA_LINKINFO)
- return add_rtattr(m, type, NULL, 0);
- else
- return -ENOTSUP;
+ case RTM_GETLINK:
+ switch (type) {
+ case IFLA_ADDRESS:
+ case IFLA_BROADCAST:
+ break;
+ default:
+ return -ENOTSUP;
+ }
+ break;
default:
return -ENOTSUP;
}
+ r = add_rtattr(m, type, data, sizeof(data));
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+int sd_rtnl_message_open_container(sd_rtnl_message *m, unsigned short type) {
+ uint16_t rtm_type;
+
+ assert_return(m, -EINVAL);
+ assert_return(!m->current_container, -EINVAL);
+
+ sd_rtnl_message_get_type(m, &rtm_type);
+
+ if (message_type_is_link(rtm_type)) {
+ if (type == IFLA_LINKINFO)
+ return add_rtattr(m, type, NULL, 0);
+ else
+ return -ENOTSUP;
+ } else
+ return -ENOTSUP;
+
return 0;
}
return 0;
}
-static int message_read(sd_rtnl_message *m, unsigned short *type, void **data) {
+int sd_rtnl_message_read(sd_rtnl_message *m, unsigned short *type, void **data) {
+ size_t remaining_size;
uint16_t rtm_type;
int r;
assert(type);
assert(data);
- if (!RTA_OK(m->next_rta, m->remaining_size))
+ remaining_size = (uint8_t *) m->hdr + m->hdr->nlmsg_len - (uint8_t *) m->next_rta;
+
+ if (!RTA_OK(m->next_rta, remaining_size))
return 0;
/* make sure we don't try to read a container
if (r < 0)
return r;
- switch (rtm_type) {
- case RTM_NEWLINK:
- case RTM_GETLINK:
- case RTM_SETLINK:
- case RTM_DELLINK:
- if (m->next_rta->rta_type == IFLA_LINKINFO) {
- return -EINVAL;
- }
- }
+ if (message_type_is_link(rtm_type) &&
+ m->next_rta->rta_type == IFLA_LINKINFO)
+ return -EINVAL;
*data = RTA_DATA(m->next_rta);
*type = m->next_rta->rta_type;
- m->next_rta = RTA_NEXT(m->next_rta, m->remaining_size);
+ m->next_rta = RTA_NEXT(m->next_rta, remaining_size);
return 1;
}
-int sd_rtnl_message_read(sd_rtnl_message *m, unsigned short *type, void **data) {
- uint16_t rtm_type;
- int r;
-
- assert_return(m, -EINVAL);
- assert_return(data, -EINVAL);
-
- r = sd_rtnl_message_get_type(m, &rtm_type);
- if (r < 0)
- return r;
-
- switch (rtm_type) {
- case RTM_NEWLINK:
- case RTM_SETLINK:
- case RTM_DELLINK:
- case RTM_GETLINK:
- if (!m->next_rta) {
- struct ifinfomsg *ifi = NLMSG_DATA(m->hdr);
-
- m->next_rta = IFLA_RTA(ifi);
- m->remaining_size = IFLA_PAYLOAD(m->hdr);
- }
- break;
- case RTM_NEWADDR:
- case RTM_DELADDR:
- case RTM_GETADDR:
- if (!m->next_rta) {
- struct ifaddrmsg *ifa = NLMSG_DATA(m->hdr);
-
- m->next_rta = IFA_RTA(ifa);
- m->remaining_size = IFA_PAYLOAD(m->hdr);
- }
- break;
- case RTM_NEWROUTE:
- case RTM_DELROUTE:
- case RTM_GETROUTE:
- if (!m->next_rta) {
- struct rtmesg *rtm = NLMSG_DATA(m->hdr);
-
- m->next_rta = RTM_RTA(rtm);
- m->remaining_size = RTM_PAYLOAD(m->hdr);
- }
- break;
- default:
- return -ENOTSUP;
- }
-
- return message_read(m, type, data);
-}
-
uint32_t message_get_serial(sd_rtnl_message *m) {
assert(m);
+ assert(m->hdr);
return m->hdr->nlmsg_seq;
}
struct nlmsgerr *err;
assert_return(m, -EINVAL);
+ assert_return(m->hdr, -EINVAL);
if (m->hdr->nlmsg_type != NLMSG_ERROR)
return 0;
}
int message_seal(sd_rtnl *nl, sd_rtnl_message *m) {
+ assert(nl);
+ assert(m);
+ assert(m->hdr);
+
if (m->sealed)
return -EPERM;
}
static int message_receive_need(sd_rtnl *rtnl, size_t *need) {
- assert_return(rtnl, -EINVAL);
- assert_return(need, -EINVAL);
+ assert(rtnl);
+ assert(need);
/* ioctl(rtnl->fd, FIONREAD, &need)
Does not appear to work on netlink sockets. libnl uses
};
ssize_t k;
- assert_return(nl, -EINVAL);
- assert_return(m, -EINVAL);
+ assert(nl);
+ assert(m);
+ assert(m->hdr);
k = sendto(nl->fd, m->hdr, m->hdr->nlmsg_len,
0, &addr.sa, sizeof(addr));
ssize_t k;
size_t need;
- assert_return(nl, -EINVAL);
- assert_return(ret, -EINVAL);
+ assert(nl);
+ assert(ret);
r = message_receive_need(nl, &need);
if (r < 0)
else if ((size_t) k < sizeof(struct nlmsghdr) ||
(size_t) k < m->hdr->nlmsg_len)
k = -EIO; /* too small (we do accept too big though) */
- else if (m->hdr->nlmsg_pid != nl->sockaddr.nl.nl_pid)
- k = 0; /* not for us */
+ else if (m->hdr->nlmsg_pid && m->hdr->nlmsg_pid != nl->sockaddr.nl.nl_pid)
+ k = 0; /* not broadcast and not for us */
if (k > 0)
switch (m->hdr->nlmsg_type) {
+ struct ifinfomsg *ifi;
+ struct ifaddrmsg *ifa;
+ struct rtmsg *rtm;
+
/* check that the size matches the message type */
case NLMSG_ERROR:
if (m->hdr->nlmsg_len < NLMSG_LENGTH(sizeof(struct nlmsgerr)))
case RTM_GETLINK:
if (m->hdr->nlmsg_len < NLMSG_LENGTH(sizeof(struct ifinfomsg)))
k = -EIO;
+ else {
+ ifi = NLMSG_DATA(m->hdr);
+ m->next_rta = IFLA_RTA(ifi);
+ }
break;
case RTM_NEWADDR:
case RTM_DELADDR:
case RTM_GETADDR:
if (m->hdr->nlmsg_len < NLMSG_LENGTH(sizeof(struct ifaddrmsg)))
k = -EIO;
+ else {
+ ifa = NLMSG_DATA(m->hdr);
+ m->next_rta = IFA_RTA(ifa);
+ }
+ break;
+ case RTM_NEWROUTE:
+ case RTM_DELROUTE:
+ case RTM_GETROUTE:
+ if (m->hdr->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtmsg)))
+ k = -EIO;
+ else {
+ rtm = NLMSG_DATA(m->hdr);
+ m->next_rta = RTM_RTA(rtm);
+ }
break;
case NLMSG_NOOP:
k = 0;
return k;
}
+
+int sd_rtnl_message_rewind(sd_rtnl_message *m) {
+ struct ifinfomsg *ifi;
+ struct ifaddrmsg *ifa;
+ struct rtmsg *rtm;
+
+ assert_return(m, -EINVAL);
+ assert_return(m->hdr, -EINVAL);
+
+ switch(m->hdr->nlmsg_type) {
+ case RTM_NEWLINK:
+ case RTM_SETLINK:
+ case RTM_GETLINK:
+ case RTM_DELLINK:
+ ifi = NLMSG_DATA(m->hdr);
+
+ m->next_rta = IFLA_RTA(ifi);
+ break;
+ case RTM_NEWADDR:
+ case RTM_GETADDR:
+ case RTM_DELADDR:
+ ifa = NLMSG_DATA(m->hdr);
+
+ m->next_rta = IFA_RTA(ifa);
+ break;
+ case RTM_NEWROUTE:
+ case RTM_GETROUTE:
+ case RTM_DELROUTE:
+ rtm = NLMSG_DATA(m->hdr);
+
+ m->next_rta = RTM_RTA(rtm);
+ break;
+ default:
+ return -ENOTSUP;
+ }
+
+ return 0;
+}
~ianmdlvl / elogind.git / blobdiff