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1 office 1 /**
2 * @file BConnectionGeneric.h
3 * @author Ambroz Bizjak <ambrop7@gmail.com>
4 *
5 * @section LICENSE
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of the author nor the
15 * names of its contributors may be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29  
30 #ifndef BADVPN_BCONNECTION_GENERIC_H
31 #define BADVPN_BCONNECTION_GENERIC_H
32  
33 #include <string.h>
34  
35 #include <misc/debug.h>
36 #include <misc/strdup.h>
37 #include <misc/memref.h>
38 #include <base/BLog.h>
39 #include <system/BConnection.h>
40  
41 #define BCONNECTION_ADDR_TYPE_BADDR 1
42 #define BCONNECTION_ADDR_TYPE_UNIX 2
43  
44 struct BConnection_addr {
45 int type;
46 union {
47 BAddr baddr;
48 struct {
49 const char *str;
50 size_t len;
51 } unix_socket_path;
52 } u;
53 };
54  
55 static struct BConnection_addr BConnection_addr_baddr (BAddr baddr)
56 {
57 struct BConnection_addr addr;
58 addr.type = BCONNECTION_ADDR_TYPE_BADDR;
59 addr.u.baddr = baddr;
60 return addr;
61 }
62  
63 static struct BConnection_addr BConnection_addr_unix (MemRef unix_socket_path)
64 {
65 struct BConnection_addr addr;
66 addr.type = BCONNECTION_ADDR_TYPE_UNIX;
67 addr.u.unix_socket_path.str = unix_socket_path.ptr;
68 addr.u.unix_socket_path.len = unix_socket_path.len;
69 return addr;
70 }
71  
72 static int BListener_InitGeneric (BListener *o, struct BConnection_addr addr, BReactor *reactor, void *user,
73 BListener_handler handler) WARN_UNUSED;
74 static int BConnector_InitGeneric (BConnector *o, struct BConnection_addr addr, BReactor *reactor, void *user,
75 BConnector_handler handler) WARN_UNUSED;
76  
77 static int BListener_InitGeneric (BListener *o, struct BConnection_addr addr, BReactor *reactor, void *user,
78 BListener_handler handler)
79 {
80 ASSERT(handler)
81 BNetwork_Assert();
82 ASSERT(addr.type != BCONNECTION_ADDR_TYPE_UNIX || !memchr(addr.u.unix_socket_path.str, '\0', addr.u.unix_socket_path.len))
83  
84 switch (addr.type) {
85 case BCONNECTION_ADDR_TYPE_BADDR: {
86 return BListener_Init(o, addr.u.baddr, reactor, user, handler);
87 } break;
88  
89 case BCONNECTION_ADDR_TYPE_UNIX: {
90 #ifdef BADVPN_USE_WINAPI
91 BLog_LogToChannel(BLOG_CHANNEL_BConnection, BLOG_ERROR, "unix sockets not supported");
92 return 0;
93 #else
94 char *str = b_strdup_bin(addr.u.unix_socket_path.str, addr.u.unix_socket_path.len);
95 if (!str) {
96 BLog_LogToChannel(BLOG_CHANNEL_BConnection, BLOG_ERROR, "b_strdup_bin failed");
97 return 0;
98 }
99 int res = BListener_InitUnix(o, str, reactor, user, handler);
100 free(str);
101 return res;
102 #endif
103 } break;
104  
105 default:
106 ASSERT(0);
107 return 0;
108 }
109 }
110  
111 static int BConnector_InitGeneric (BConnector *o, struct BConnection_addr addr, BReactor *reactor, void *user,
112 BConnector_handler handler)
113 {
114 ASSERT(handler)
115 BNetwork_Assert();
116 ASSERT(addr.type != BCONNECTION_ADDR_TYPE_UNIX || !memchr(addr.u.unix_socket_path.str, '\0', addr.u.unix_socket_path.len))
117  
118 switch (addr.type) {
119 case BCONNECTION_ADDR_TYPE_BADDR: {
120 return BConnector_Init(o, addr.u.baddr, reactor, user, handler);
121 } break;
122  
123 case BCONNECTION_ADDR_TYPE_UNIX: {
124 #ifdef BADVPN_USE_WINAPI
125 BLog_LogToChannel(BLOG_CHANNEL_BConnection, BLOG_ERROR, "unix sockets not supported");
126 return 0;
127 #else
128 char *str = b_strdup_bin(addr.u.unix_socket_path.str, addr.u.unix_socket_path.len);
129 if (!str) {
130 BLog_LogToChannel(BLOG_CHANNEL_BConnection, BLOG_ERROR, "b_strdup_bin failed");
131 return 0;
132 }
133 int res = BConnector_InitUnix(o, str, reactor, user, handler);
134 free(str);
135 return res;
136 #endif
137 } break;
138  
139 default:
140 ASSERT(0);
141 return 0;
142 }
143 }
144  
145 #endif