d99fe5ec96
BUG: b/5532633 Change-Id: I271168764e26dc465d2442f5015338a3e9a479b8 Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
129 lines
2.7 KiB
C
129 lines
2.7 KiB
C
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/* NOTICE: This is a clean room re-implementation of libnl */
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#include <errno.h>
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#include <unistd.h>
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#include <malloc.h>
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#include <sys/time.h>
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#include <sys/socket.h>
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#include "netlink-types.h"
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/* Join group */
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int nl_socket_add_membership(struct nl_sock *sk, int group)
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{
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return setsockopt(sk->s_fd, SOL_NETLINK,
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NETLINK_ADD_MEMBERSHIP, &group, sizeof(group));
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}
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/* Allocate new netlink socket. */
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static struct nl_sock *_nl_socket_alloc(void)
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{
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struct nl_sock *sk;
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struct timeval tv;
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struct nl_cb *cb;
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sk = (struct nl_sock *) malloc(sizeof(struct nl_sock));
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if (!sk)
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return NULL;
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memset(sk, 0, sizeof(*sk));
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/* Get current time */
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if (gettimeofday(&tv, NULL))
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goto fail;
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else
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sk->s_seq_next = (int) tv.tv_sec;
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/* Create local socket */
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sk->s_local.nl_family = AF_NETLINK;
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sk->s_local.nl_pid = 0; /* Kernel fills in pid */
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sk->s_local.nl_groups = 0; /* No groups */
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/* Create peer socket */
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sk->s_peer.nl_family = AF_NETLINK;
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sk->s_peer.nl_pid = 0; /* Kernel */
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sk->s_peer.nl_groups = 0; /* No groups */
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return sk;
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fail:
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free(sk);
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return NULL;
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}
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/* Allocate new netlink socket. */
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struct nl_sock *nl_socket_alloc(void)
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{
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struct nl_sock *sk = _nl_socket_alloc();
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struct nl_cb *cb;
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if (!sk)
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return NULL;
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cb = nl_cb_alloc(NL_CB_DEFAULT);
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if (!cb)
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goto cb_fail;
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sk->s_cb = cb;
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return sk;
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cb_fail:
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free(sk);
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return NULL;
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}
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/* Allocate new socket with custom callbacks. */
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struct nl_sock *nl_socket_alloc_cb(struct nl_cb *cb)
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{
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struct nl_sock *sk = _nl_socket_alloc();
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if (!sk)
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return NULL;
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sk->s_cb = cb;
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nl_cb_get(cb);
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return sk;
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}
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/* Free a netlink socket. */
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void nl_socket_free(struct nl_sock *sk)
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{
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nl_cb_put(sk->s_cb);
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close(sk->s_fd);
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free(sk);
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}
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/* Sets socket buffer size of netlink socket */
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int nl_socket_set_buffer_size(struct nl_sock *sk, int rxbuf, int txbuf)
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{
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if (setsockopt(sk->s_fd, SOL_SOCKET, SO_SNDBUF, \
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&rxbuf, (socklen_t) sizeof(rxbuf)))
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goto error;
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if (setsockopt(sk->s_fd, SOL_SOCKET, SO_RCVBUF, \
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&txbuf, (socklen_t) sizeof(txbuf)))
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goto error;
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return 0;
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error:
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return -errno;
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}
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int nl_socket_get_fd(struct nl_sock *sk)
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{
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return sk->s_fd;
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}
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