1 /*
2 * Copyright (C) 2017-2021 THL A29 Limited, a Tencent company.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
18 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
23 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 *
25 */
26
27 #include <string.h>
28 #include <errno.h>
29 #include <sys/socket.h>
30
31 #include "rtioctl.h"
32 #include "ff_ipc.h"
33
34 int rt_shutdown_rd = 0;
35 int rt_sofib = 0;
36
37 int
rt_socket(int domain,int type,int protocol)38 rt_socket(int domain, int type, int protocol)
39 {
40 if (domain != PF_ROUTE || type != SOCK_RAW) {
41 errno = EINVAL;
42 return -1;
43 }
44
45 return 0;
46 }
47
48 int
rt_shutdown(int fd,int how)49 rt_shutdown(int fd, int how)
50 {
51 if (how == SHUT_RD) {
52 rt_shutdown_rd = 1;
53 }
54 return 0;
55 }
56
57 int
rt_setsockopt(int sockfd,int level,int optname,const void * optval,socklen_t optlen)58 rt_setsockopt(int sockfd, int level, int optname,
59 const void *optval, socklen_t optlen)
60 {
61 if (level == SOL_SOCKET && optname == SO_SETFIB) {
62 rt_sofib = *(int *)optval;
63 }
64 return 0;
65 }
66
67 void
rt_close(int fd)68 rt_close(int fd)
69 {
70 return;
71 }
72
73 int
rtioctl(char * data,unsigned len,unsigned read_len)74 rtioctl(char *data, unsigned len, unsigned read_len)
75 {
76 struct ff_msg *msg, *retmsg = NULL;
77 unsigned maxlen;
78
79 msg = ff_ipc_msg_alloc();
80 if (msg == NULL) {
81 errno = ENOMEM;
82 return -1;
83 }
84
85 if (len > msg->buf_len) {
86 errno = EINVAL;
87 ff_ipc_msg_free(msg);
88 return -1;
89 }
90
91 if (read_len > msg->buf_len) {
92 read_len = msg->buf_len;
93 }
94
95 maxlen = read_len ? read_len : len;
96
97 msg->msg_type = FF_ROUTE;
98 msg->route.fib = rt_sofib;
99 msg->route.len = len;
100 msg->route.maxlen = maxlen;
101 msg->route.data = msg->buf_addr;
102 memcpy(msg->route.data, data, len);
103 msg->buf_addr += len;
104
105 int ret = ff_ipc_send(msg);
106 if (ret < 0) {
107 errno = EPIPE;
108 ff_ipc_msg_free(msg);
109 return -1;
110 }
111
112 do {
113 if (retmsg != NULL) {
114 ff_ipc_msg_free(retmsg);
115 }
116 ret = ff_ipc_recv(&retmsg, msg->msg_type);
117 if (ret < 0) {
118 errno = EPIPE;
119 return -1;
120 }
121 } while (msg != retmsg);
122
123 if (retmsg->result == 0) {
124 ret = retmsg->route.len;
125
126 if (!rt_shutdown_rd && read_len > 0) {
127 memcpy(data, retmsg->route.data, retmsg->route.len);
128 }
129 } else {
130 ret = -1;
131 errno = retmsg->result;
132 }
133
134 ff_ipc_msg_free(msg);
135
136 return ret;
137 }
138
139