#include "hmap.h"
#include "netlink.h"
#include "netlink-protocol.h"
+#include "odp-netlink.h"
#include "ofpbuf.h"
#include "ovs-thread.h"
#include "poll-loop.h"
g_last_portid++;
return g_last_portid;
}
-
-static void
-set_sock_pid_in_kernel(HANDLE handle, uint32_t pid)
- OVS_GUARDED_BY(portid_mutex)
-{
- struct nlmsghdr msg = { 0 };
-
- msg.nlmsg_len = sizeof(struct nlmsghdr);
- msg.nlmsg_type = 80; /* target = set file pid */
- msg.nlmsg_flags = 0;
- msg.nlmsg_seq = 0;
- msg.nlmsg_pid = pid;
-
- WriteFile(handle, &msg, sizeof(struct nlmsghdr), NULL, NULL);
-}
-#endif /* _WIN32 */
+#endif /* _WIN32 */
/* A single (bad) Netlink message can in theory dump out many, many log
* messages, so the burst size is set quite high here to avoid missing useful
static uint32_t nl_sock_allocate_seq(struct nl_sock *, unsigned int n);
static void log_nlmsg(const char *function, int error,
const void *message, size_t size, int protocol);
+#ifdef _WIN32
+static int get_sock_pid_from_kernel(struct nl_sock *sock);
+#endif
\f
/* Netlink sockets. */
struct nl_sock {
#ifdef _WIN32
HANDLE handle;
+ OVERLAPPED overlapped;
+ DWORD read_ioctl;
#else
int fd;
#endif
sock = xmalloc(sizeof *sock);
#ifdef _WIN32
- sock->handle = CreateFileA("\\\\.\\OpenVSwitchDevice",
- GENERIC_READ | GENERIC_WRITE,
- FILE_SHARE_READ | FILE_SHARE_WRITE,
- NULL, OPEN_EXISTING,
- FILE_ATTRIBUTE_NORMAL, NULL);
-
- int last_error = GetLastError();
+ sock->handle = CreateFile(OVS_DEVICE_NAME_USER,
+ GENERIC_READ | GENERIC_WRITE,
+ FILE_SHARE_READ | FILE_SHARE_WRITE,
+ NULL, OPEN_EXISTING,
+ FILE_FLAG_OVERLAPPED, NULL);
if (sock->handle == INVALID_HANDLE_VALUE) {
- VLOG_ERR("fcntl: %s", ovs_strerror(last_error));
+ VLOG_ERR("fcntl: %s", ovs_lasterror_to_string());
goto error;
}
+
+ memset(&sock->overlapped, 0, sizeof sock->overlapped);
+ sock->overlapped.hEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
+ if (sock->overlapped.hEvent == NULL) {
+ VLOG_ERR("fcntl: %s", ovs_lasterror_to_string());
+ goto error;
+ }
+ /* Initialize the type/ioctl to Generic */
+ sock->read_ioctl = OVS_IOCTL_READ;
#else
sock->fd = socket(AF_NETLINK, SOCK_RAW, protocol);
if (sock->fd < 0) {
rcvbuf = 1024 * 1024;
#ifdef _WIN32
sock->rcvbuf = rcvbuf;
- ovs_mutex_lock(&portid_mutex);
- sock->pid = portid_next();
- set_sock_pid_in_kernel(sock->handle, sock->pid);
- ovs_mutex_unlock(&portid_mutex);
+ retval = get_sock_pid_from_kernel(sock);
+ if (retval != 0) {
+ goto error;
+ }
#else
if (setsockopt(sock->fd, SOL_SOCKET, SO_RCVBUFFORCE,
&rcvbuf, sizeof rcvbuf)) {
}
}
#ifdef _WIN32
+ if (sock->overlapped.hEvent) {
+ CloseHandle(sock->overlapped.hEvent);
+ }
if (sock->handle != INVALID_HANDLE_VALUE) {
CloseHandle(sock->handle);
}
{
if (sock) {
#ifdef _WIN32
+ if (sock->overlapped.hEvent) {
+ CloseHandle(sock->overlapped.hEvent);
+ }
CloseHandle(sock->handle);
#else
close(sock->fd);
}
}
+#ifdef _WIN32
+/* Reads the pid for 'sock' generated in the kernel datapath. The function
+ * follows a transaction semantic. Eventually this function should call into
+ * nl_transact. */
+static int
+get_sock_pid_from_kernel(struct nl_sock *sock)
+{
+ struct nl_transaction txn;
+ struct ofpbuf request;
+ uint64_t request_stub[128];
+ struct ofpbuf reply;
+ uint64_t reply_stub[128];
+ struct ovs_header *ovs_header;
+ struct nlmsghdr *nlmsg;
+ uint32_t seq;
+ int retval;
+ DWORD bytes;
+ int ovs_msg_size = sizeof (struct nlmsghdr) + sizeof (struct genlmsghdr) +
+ sizeof (struct ovs_header);
+
+ ofpbuf_use_stub(&request, request_stub, sizeof request_stub);
+ txn.request = &request;
+ ofpbuf_use_stub(&reply, reply_stub, sizeof reply_stub);
+ txn.reply = &reply;
+
+ seq = nl_sock_allocate_seq(sock, 1);
+ nl_msg_put_genlmsghdr(&request, 0, OVS_WIN_NL_CTRL_FAMILY_ID, 0,
+ OVS_CTRL_CMD_WIN_GET_PID, OVS_WIN_CONTROL_VERSION);
+ nlmsg = nl_msg_nlmsghdr(txn.request);
+ nlmsg->nlmsg_seq = seq;
+
+ ovs_header = ofpbuf_put_uninit(&request, sizeof *ovs_header);
+ ovs_header->dp_ifindex = 0;
+ ovs_header = ofpbuf_put_uninit(&reply, ovs_msg_size);
+
+ if (!DeviceIoControl(sock->handle, OVS_IOCTL_TRANSACT,
+ ofpbuf_data(txn.request), ofpbuf_size(txn.request),
+ ofpbuf_data(txn.reply), ofpbuf_size(txn.reply),
+ &bytes, NULL)) {
+ retval = EINVAL;
+ goto done;
+ } else {
+ if (bytes < ovs_msg_size) {
+ retval = EINVAL;
+ goto done;
+ }
+
+ nlmsg = nl_msg_nlmsghdr(txn.reply);
+ if (nlmsg->nlmsg_seq != seq) {
+ retval = EINVAL;
+ goto done;
+ }
+ sock->pid = nlmsg->nlmsg_pid;
+ }
+ retval = 0;
+
+done:
+ ofpbuf_uninit(&request);
+ ofpbuf_uninit(&reply);
+ return retval;
+}
+#endif /* _WIN32 */
+
+#ifdef _WIN32
+static int __inline
+nl_sock_mcgroup(struct nl_sock *sock, unsigned int multicast_group, bool join)
+{
+ struct ofpbuf request;
+ uint64_t request_stub[128];
+ struct ovs_header *ovs_header;
+ struct nlmsghdr *nlmsg;
+ int error;
+
+ ofpbuf_use_stub(&request, request_stub, sizeof request_stub);
+
+ nl_msg_put_genlmsghdr(&request, 0, OVS_WIN_NL_CTRL_FAMILY_ID, 0,
+ OVS_CTRL_CMD_MC_SUBSCRIBE_REQ,
+ OVS_WIN_CONTROL_VERSION);
+
+ ovs_header = ofpbuf_put_uninit(&request, sizeof *ovs_header);
+ ovs_header->dp_ifindex = 0;
+
+ nl_msg_put_u32(&request, OVS_NL_ATTR_MCAST_GRP, multicast_group);
+ nl_msg_put_u8(&request, OVS_NL_ATTR_MCAST_JOIN, join ? 1 : 0);
+
+ error = nl_sock_send(sock, &request, true);
+ ofpbuf_uninit(&request);
+ return error;
+}
+#endif
/* Tries to add 'sock' as a listener for 'multicast_group'. Returns 0 if
* successful, otherwise a positive errno value.
*
nl_sock_join_mcgroup(struct nl_sock *sock, unsigned int multicast_group)
{
#ifdef _WIN32
-#define OVS_VPORT_MCGROUP_FALLBACK_ID 33
- struct ofpbuf msg_buf;
- struct message_multicast
- {
- struct nlmsghdr;
- /* if true, join; if else, leave */
- unsigned char join;
- unsigned int groupId;
- };
-
- struct message_multicast msg = { 0 };
-
- msg.nlmsg_len = sizeof(struct message_multicast);
- msg.nlmsg_type = OVS_VPORT_MCGROUP_FALLBACK_ID;
- msg.nlmsg_flags = 0;
- msg.nlmsg_seq = 0;
- msg.nlmsg_pid = sock->pid;
-
- msg.join = 1;
- msg.groupId = multicast_group;
- msg_buf.base_ = &msg;
- msg_buf.data_ = &msg;
- msg_buf.size_ = msg.nlmsg_len;
-
- nl_sock_send__(sock, &msg_buf, msg.nlmsg_seq, 0);
+ /* Set the socket type as a "multicast" socket */
+ sock->read_ioctl = OVS_IOCTL_READ_EVENT;
+ int error = nl_sock_mcgroup(sock, multicast_group, true);
+ if (error) {
+ sock->read_ioctl = OVS_IOCTL_READ;
+ VLOG_WARN("could not join multicast group %u (%s)",
+ multicast_group, ovs_strerror(errno));
+ return errno;
+ }
#else
if (setsockopt(sock->fd, SOL_NETLINK, NETLINK_ADD_MEMBERSHIP,
&multicast_group, sizeof multicast_group) < 0) {
nl_sock_leave_mcgroup(struct nl_sock *sock, unsigned int multicast_group)
{
#ifdef _WIN32
- struct ofpbuf msg_buf;
- struct message_multicast
- {
- struct nlmsghdr;
- /* if true, join; if else, leave*/
- unsigned char join;
- };
-
- struct message_multicast msg = { 0 };
- nl_msg_put_nlmsghdr(&msg, sizeof(struct message_multicast),
- multicast_group, 0);
- msg.join = 0;
-
- msg_buf.base_ = &msg;
- msg_buf.data_ = &msg;
- msg_buf.size_ = msg.nlmsg_len;
-
- nl_sock_send__(sock, &msg_buf, msg.nlmsg_seq, 0);
+ int error = nl_sock_mcgroup(sock, multicast_group, false);
+ if (error) {
+ VLOG_WARN("could not leave multicast group %u (%s)",
+ multicast_group, ovs_strerror(errno));
+ return errno;
+ }
+ sock->read_ioctl = OVS_IOCTL_READ;
#else
if (setsockopt(sock->fd, SOL_NETLINK, NETLINK_DROP_MEMBERSHIP,
&multicast_group, sizeof multicast_group) < 0) {
do {
int retval;
#ifdef _WIN32
- bool result;
- DWORD last_error = 0;
- result = WriteFile(sock->handle, ofpbuf_data(msg), ofpbuf_size(msg),
- &retval, NULL);
- last_error = GetLastError();
- if (last_error != ERROR_SUCCESS && !result) {
+ DWORD bytes;
+
+ if (!DeviceIoControl(sock->handle, OVS_IOCTL_WRITE,
+ ofpbuf_data(msg), ofpbuf_size(msg), NULL, 0,
+ &bytes, NULL)) {
retval = -1;
- errno = EAGAIN;
+ /* XXX: Map to a more appropriate error based on GetLastError(). */
+ errno = EINVAL;
+ } else {
+ retval = ofpbuf_size(msg);
}
#else
- retval = send(sock->fd, ofpbuf_data(msg), ofpbuf_size(msg), wait ? 0 : MSG_DONTWAIT);
+ retval = send(sock->fd, ofpbuf_data(msg), ofpbuf_size(msg),
+ wait ? 0 : MSG_DONTWAIT);
#endif
error = retval < 0 ? errno : 0;
} while (error == EINTR);
* 'tail' to allow Netlink messages to be up to 64 kB long (a reasonable
* figure since that's the maximum length of a Netlink attribute). */
struct nlmsghdr *nlmsghdr;
-#ifdef _WIN32
-#define MAX_STACK_LENGTH 81920
- uint8_t tail[MAX_STACK_LENGTH];
-#else
uint8_t tail[65536];
-#endif
struct iovec iov[2];
struct msghdr msg;
ssize_t retval;
do {
nlmsghdr->nlmsg_len = UINT32_MAX;
#ifdef _WIN32
- boolean result = false;
- DWORD last_error = 0;
- result = ReadFile(sock->handle, tail, MAX_STACK_LENGTH, &retval, NULL);
- last_error = GetLastError();
- if (last_error != ERROR_SUCCESS && !result) {
+ DWORD bytes;
+ if (!DeviceIoControl(sock->handle, sock->read_ioctl,
+ NULL, 0, tail, sizeof tail, &bytes, NULL)) {
retval = -1;
- errno = EAGAIN;
+ errno = EINVAL;
} else {
- ofpbuf_put(buf, tail, retval);
+ retval = bytes;
+ if (retval == 0) {
+ retval = -1;
+ errno = EAGAIN;
+ } else {
+ if (retval >= buf->allocated) {
+ ofpbuf_reinit(buf, retval);
+ }
+ memcpy(ofpbuf_data(buf), tail, retval);
+ ofpbuf_set_size(buf, retval);
+ }
}
#else
retval = recvmsg(sock->fd, &msg, wait ? 0 : MSG_DONTWAIT);
iovs[i].iov_len = ofpbuf_size(txn->request);
}
+#ifndef _WIN32
memset(&msg, 0, sizeof msg);
msg.msg_iov = iovs;
msg.msg_iovlen = n;
do {
-#ifdef _WIN32
- DWORD last_error = 0;
- bool result = FALSE;
- for (i = 0; i < n; i++) {
- result = WriteFile((HANDLE)sock->handle, iovs[i].iov_base, iovs[i].iov_len,
- &error, NULL);
- last_error = GetLastError();
- if (last_error != ERROR_SUCCESS && !result) {
- error = EAGAIN;
- errno = EAGAIN;
- } else {
- error = 0;
- }
- }
-#else
error = sendmsg(sock->fd, &msg, 0) < 0 ? errno : 0;
-#endif
} while (error == EINTR);
for (i = 0; i < n; i++) {
struct nl_transaction *txn = transactions[i];
- log_nlmsg(__func__, error, ofpbuf_data(txn->request), ofpbuf_size(txn->request),
- sock->protocol);
+ log_nlmsg(__func__, error, ofpbuf_data(txn->request),
+ ofpbuf_size(txn->request), sock->protocol);
}
if (!error) {
COVERAGE_ADD(netlink_sent, n);
base_seq += i + 1;
}
ofpbuf_uninit(&tmp_reply);
+#else
+ error = 0;
+ for (i = 0; i < n; i++) {
+ DWORD reply_len;
+ uint8_t tail[65536];
+ struct nl_transaction *txn = transactions[i];
+ struct nlmsghdr *request_nlmsg, *reply_nlmsg;
+
+ if (!DeviceIoControl(sock->handle, OVS_IOCTL_TRANSACT,
+ ofpbuf_data(txn->request),
+ ofpbuf_size(txn->request),
+ txn->reply ? tail : 0,
+ txn->reply ? sizeof tail : 0,
+ &reply_len, NULL)) {
+ /* XXX: Map to a more appropriate error. */
+ error = EINVAL;
+ break;
+ }
+
+ if (txn->reply) {
+ if (reply_len < sizeof *reply_nlmsg) {
+ VLOG_DBG_RL(&rl, "insufficient length of reply %#"PRIu32,
+ reply_len);
+ break;
+ }
+
+ /* Validate the sequence number in the reply. */
+ request_nlmsg = nl_msg_nlmsghdr(txn->request);
+ reply_nlmsg = (struct nlmsghdr *)tail;
+
+ if (request_nlmsg->nlmsg_seq != reply_nlmsg->nlmsg_seq) {
+ ovs_assert(request_nlmsg->nlmsg_seq == reply_nlmsg->nlmsg_seq);
+ VLOG_DBG_RL(&rl, "mismatched seq request %#"PRIx32
+ ", reply %#"PRIx32, request_nlmsg->nlmsg_seq,
+ reply_nlmsg->nlmsg_seq);
+ break;
+ }
+
+ /* If reply was expected, verify if there was indeed a reply
+ * received. */
+ if (reply_len == 0) {
+ nl_sock_record_errors__(transactions, n, 0);
+ VLOG_DBG_RL(&rl, "reply not seen when expected seq %#"PRIx32,
+ request_nlmsg->nlmsg_seq);
+ break;
+ }
+
+ /* Copy the reply to the buffer specified by the caller. */
+ if (reply_len > txn->reply->allocated) {
+ ofpbuf_reinit(txn->reply, reply_len);
+ }
+ memcpy(ofpbuf_data(txn->reply), tail, reply_len);
+ ofpbuf_set_size(txn->reply, reply_len);
+
+ /* Handle errors embedded within the netlink message. */
+ if (nl_msg_nlmsgerr(txn->reply, &txn->error)) {
+ if (txn->reply) {
+ ofpbuf_clear(txn->reply);
+ }
+ if (txn->error) {
+ VLOG_DBG_RL(&rl, "received NAK error=%d (%s)",
+ error, ovs_strerror(txn->error));
+ }
+ } else {
+ txn->error = 0;
+ }
+ }
+
+ /* Count the number of successful transactions. */
+ (*done)++;
+ }
+
+ if (!error) {
+ COVERAGE_ADD(netlink_sent, n);
+ }
+#endif
return error;
}
return status == EOF ? 0 : status;
}
+#ifdef _WIN32
+/* Pend an I/O request in the driver. The driver completes the I/O whenever
+ * an event or a packet is ready to be read. Once the I/O is completed
+ * the overlapped structure event associated with the pending I/O will be set
+ */
+static int
+pend_io_request(const struct nl_sock *sock)
+{
+ struct ofpbuf request;
+ uint64_t request_stub[128];
+ struct ovs_header *ovs_header;
+ struct nlmsghdr *nlmsg;
+ uint32_t seq;
+ int retval;
+ int error;
+ DWORD bytes;
+ OVERLAPPED *overlapped = CONST_CAST(OVERLAPPED *, &sock->overlapped);
+
+ int ovs_msg_size = sizeof (struct nlmsghdr) + sizeof (struct genlmsghdr) +
+ sizeof (struct ovs_header);
+
+ ofpbuf_use_stub(&request, request_stub, sizeof request_stub);
+
+ seq = nl_sock_allocate_seq(sock, 1);
+ nl_msg_put_genlmsghdr(&request, 0, OVS_WIN_NL_CTRL_FAMILY_ID, 0,
+ OVS_CTRL_CMD_WIN_PEND_REQ, OVS_WIN_CONTROL_VERSION);
+ nlmsg = nl_msg_nlmsghdr(&request);
+ nlmsg->nlmsg_seq = seq;
+
+ ovs_header = ofpbuf_put_uninit(&request, sizeof *ovs_header);
+ ovs_header->dp_ifindex = 0;
+
+ if (!DeviceIoControl(sock->handle, OVS_IOCTL_WRITE,
+ ofpbuf_data(&request), ofpbuf_size(&request),
+ NULL, 0, &bytes, overlapped)) {
+ error = GetLastError();
+ /* Check if the I/O got pended */
+ if (error != ERROR_IO_INCOMPLETE && error != ERROR_IO_PENDING) {
+ VLOG_ERR("nl_sock_wait failed - %s\n", ovs_format_message(error));
+ retval = EINVAL;
+ goto done;
+ }
+ } else {
+ /* The I/O was completed synchronously */
+ poll_immediate_wake();
+ }
+ retval = 0;
+
+done:
+ ofpbuf_uninit(&request);
+ return retval;
+}
+#endif /* _WIN32 */
+
/* Causes poll_block() to wake up when any of the specified 'events' (which is
* a OR'd combination of POLLIN, POLLOUT, etc.) occur on 'sock'. */
void
nl_sock_wait(const struct nl_sock *sock, short int events)
{
#ifdef _WIN32
+ if (sock->overlapped.Internal != STATUS_PENDING) {
+ pend_io_request(sock);
+ }
poll_fd_wait(sock->handle, events);
#else
poll_fd_wait(sock->fd, events);
}
}
+#ifndef _WIN32
static int
do_lookup_genl_family(const char *name, struct nlattr **attrs,
struct ofpbuf **replyp)
*replyp = reply;
return 0;
}
+#else
+static int
+do_lookup_genl_family(const char *name, struct nlattr **attrs,
+ struct ofpbuf **replyp)
+{
+ struct nlmsghdr *nlmsg;
+ struct ofpbuf *reply;
+ int error;
+ uint16_t family_id;
+ const char *family_name;
+ uint32_t family_version;
+ uint32_t family_attrmax;
+ uint32_t mcgrp_id = OVS_WIN_NL_INVALID_MCGRP_ID;
+ const char *mcgrp_name = NULL;
+
+ *replyp = NULL;
+ reply = ofpbuf_new(1024);
+
+ /* CTRL_ATTR_MCAST_GROUPS is supported only for VPORT family. */
+ if (!strcmp(name, OVS_WIN_CONTROL_FAMILY)) {
+ family_id = OVS_WIN_NL_CTRL_FAMILY_ID;
+ family_name = OVS_WIN_CONTROL_FAMILY;
+ family_version = OVS_WIN_CONTROL_VERSION;
+ family_attrmax = OVS_WIN_CONTROL_ATTR_MAX;
+ } else if (!strcmp(name, OVS_DATAPATH_FAMILY)) {
+ family_id = OVS_WIN_NL_DATAPATH_FAMILY_ID;
+ family_name = OVS_DATAPATH_FAMILY;
+ family_version = OVS_DATAPATH_VERSION;
+ family_attrmax = OVS_DP_ATTR_MAX;
+ } else if (!strcmp(name, OVS_PACKET_FAMILY)) {
+ family_id = OVS_WIN_NL_PACKET_FAMILY_ID;
+ family_name = OVS_PACKET_FAMILY;
+ family_version = OVS_PACKET_VERSION;
+ family_attrmax = OVS_PACKET_ATTR_MAX;
+ } else if (!strcmp(name, OVS_VPORT_FAMILY)) {
+ family_id = OVS_WIN_NL_VPORT_FAMILY_ID;
+ family_name = OVS_VPORT_FAMILY;
+ family_version = OVS_VPORT_VERSION;
+ family_attrmax = OVS_VPORT_ATTR_MAX;
+ mcgrp_id = OVS_WIN_NL_VPORT_MCGRP_ID;
+ mcgrp_name = OVS_VPORT_MCGROUP;
+ } else if (!strcmp(name, OVS_FLOW_FAMILY)) {
+ family_id = OVS_WIN_NL_FLOW_FAMILY_ID;
+ family_name = OVS_FLOW_FAMILY;
+ family_version = OVS_FLOW_VERSION;
+ family_attrmax = OVS_FLOW_ATTR_MAX;
+ } else if (!strcmp(name, OVS_WIN_NETDEV_FAMILY)) {
+ family_id = OVS_WIN_NL_NETDEV_FAMILY_ID;
+ family_name = OVS_WIN_NETDEV_FAMILY;
+ family_version = OVS_WIN_NETDEV_VERSION;
+ family_attrmax = OVS_WIN_NETDEV_ATTR_MAX;
+ } else {
+ ofpbuf_delete(reply);
+ return EINVAL;
+ }
+
+ nl_msg_put_genlmsghdr(reply, 0, GENL_ID_CTRL, 0,
+ CTRL_CMD_NEWFAMILY, family_version);
+ /* CTRL_ATTR_HDRSIZE and CTRL_ATTR_OPS are not populated, but the
+ * callers do not seem to need them. */
+ nl_msg_put_u16(reply, CTRL_ATTR_FAMILY_ID, family_id);
+ nl_msg_put_string(reply, CTRL_ATTR_FAMILY_NAME, family_name);
+ nl_msg_put_u32(reply, CTRL_ATTR_VERSION, family_version);
+ nl_msg_put_u32(reply, CTRL_ATTR_MAXATTR, family_attrmax);
+
+ if (mcgrp_id != OVS_WIN_NL_INVALID_MCGRP_ID) {
+ size_t mcgrp_ofs1 = nl_msg_start_nested(reply, CTRL_ATTR_MCAST_GROUPS);
+ size_t mcgrp_ofs2= nl_msg_start_nested(reply,
+ OVS_WIN_NL_VPORT_MCGRP_ID - OVS_WIN_NL_MCGRP_START_ID);
+ nl_msg_put_u32(reply, CTRL_ATTR_MCAST_GRP_ID, mcgrp_id);
+ ovs_assert(mcgrp_name != NULL);
+ nl_msg_put_string(reply, CTRL_ATTR_MCAST_GRP_NAME, mcgrp_name);
+ nl_msg_end_nested(reply, mcgrp_ofs2);
+ nl_msg_end_nested(reply, mcgrp_ofs1);
+ }
+
+ /* Set the total length of the netlink message. */
+ nlmsg = nl_msg_nlmsghdr(reply);
+ nlmsg->nlmsg_len = ofpbuf_size(reply);
+
+ if (!nl_policy_parse(reply, NLMSG_HDRLEN + GENL_HDRLEN,
+ family_policy, attrs, ARRAY_SIZE(family_policy))
+ || nl_attr_get_u16(attrs[CTRL_ATTR_FAMILY_ID]) == 0) {
+ ofpbuf_delete(reply);
+ return EPROTO;
+ }
+
+ *replyp = reply;
+ return 0;
+}
+#endif
/* Finds the multicast group called 'group_name' in genl family 'family_name'.
* When successful, writes its result to 'multicast_group' and returns 0.
projects / cascardo / ovs.git / blobdiff