Commit | Line | Data |
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00afbb65 LM |
1 | /* depend: */ |
2 | /* cflags: */ | |
3 | /* linker: color.o debug.o */ | |
4 | ||
5 | #include <assert.h> | |
6 | #include <stdio.h> | |
7 | #include <stdlib.h> | |
89f0e084 | 8 | #include <string.h> |
00afbb65 LM |
9 | #ifdef _WIN32 /* Windows */ |
10 | #include <winsock2.h> | |
11 | #include <ws2tcpip.h> | |
12 | #else /* Posix */ | |
13 | #include <errno.h> | |
14 | #include <unistd.h> | |
15 | #include <fcntl.h> | |
16 | #include <netinet/ip.h> | |
17 | #include <netinet/tcp.h> | |
18 | //#include <sys/types.h> | |
19 | //#include <sys/socket.h> | |
89f0e084 | 20 | #include <sys/select.h> |
00afbb65 | 21 | #endif |
7a6b7a44 | 22 | #include <unistd.h> |
00afbb65 LM |
23 | |
24 | #include "debug.h" | |
25 | ||
26 | #include "server.h" | |
27 | ||
89f0e084 | 28 | /* compat */ |
00afbb65 LM |
29 | |
30 | #ifdef _WIN32 /* Windows */ | |
00afbb65 LM |
31 | #define PF_INET AF_INET |
32 | #define ERRNO (WSAGetLastError ()) | |
33 | #else /* Posix */ | |
00afbb65 LM |
34 | #define closesocket close |
35 | #define ERRNO errno | |
00afbb65 LM |
36 | #define SOCKET_ERROR -1 |
37 | #endif | |
38 | ||
89f0e084 LM |
39 | /* types */ |
40 | ||
00afbb65 LM |
41 | /* constants */ |
42 | ||
04a2223d | 43 | #define BACKLOG 5 |
00afbb65 | 44 | #define BUFFER_SIZE 4096 |
04a2223d | 45 | #define TIMEOUT 100000 |
00afbb65 LM |
46 | |
47 | /* macros */ | |
48 | ||
49 | /* gobal variables */ | |
50 | ||
89f0e084 | 51 | /* init network context */ |
00afbb65 | 52 | |
89f0e084 | 53 | void init_network_context (void) |
00afbb65 LM |
54 | { |
55 | #ifdef _WIN32 /* Windows */ | |
56 | WSADATA WSAData; | |
57 | WSAStartup (MAKEWORD(2,0), &WSAData); | |
58 | assert (INVALID_SOCKET == (socket_t)-1); | |
9ff99d58 | 59 | assert (SOCKET_ERROR == -1); |
00afbb65 | 60 | #endif |
89f0e084 LM |
61 | } |
62 | ||
63 | /* terminate network context */ | |
64 | ||
65 | void terminate_network_context (void) | |
66 | { | |
67 | #ifdef _WIN32 /* Windows */ | |
68 | WSACleanup (); | |
69 | #endif | |
70 | } | |
00afbb65 | 71 | |
89f0e084 LM |
72 | /* open listening socket */ |
73 | ||
74 | socket_t open_listening_socket (int port) | |
75 | { | |
1e0cfbd7 LM |
76 | int val = 1; |
77 | ||
00afbb65 | 78 | VERBOSE (DEBUG, fprintf (stdout, "Opening socket\n")); |
1e0cfbd7 LM |
79 | //socket_t sock = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP); |
80 | socket_t sock = socket (AF_INET, SOCK_STREAM, 0); | |
9ff99d58 | 81 | if (sock == INVALID_SOCKET) { |
00afbb65 | 82 | return -1; |
9ff99d58 | 83 | } |
00afbb65 LM |
84 | |
85 | struct sockaddr_in addr = {0}; | |
7a6b7a44 | 86 | //bzero (&addr, sizeof (addr)); |
1e0cfbd7 LM |
87 | //addr.sin_family = PF_INET; |
88 | addr.sin_family = AF_INET; | |
00afbb65 LM |
89 | addr.sin_port = htons (port); |
90 | addr.sin_addr.s_addr = htonl (INADDR_ANY); | |
91 | ||
92 | VERBOSE (DEBUG, fprintf (stdout, "Binding socket\n")); | |
1e0cfbd7 | 93 | //setsockopt (sock, SOL_SOCKET, SO_REUSEADDR, &val, sizeof (val)); |
00afbb65 | 94 | int rc = bind (sock, (struct sockaddr *)&addr, sizeof (addr)); |
9ff99d58 | 95 | if (rc == SOCKET_ERROR) { |
04a2223d | 96 | VERBOSE (ERROR, fprintf (stderr, "error: bind %d\n", ERRNO)); |
00afbb65 | 97 | rc = closesocket (sock); |
9ff99d58 | 98 | if (rc == SOCKET_ERROR) { |
04a2223d | 99 | VERBOSE (ERROR, fprintf (stderr, "error: close %d\n", ERRNO)); |
00afbb65 LM |
100 | } |
101 | return -1; | |
102 | } | |
103 | ||
104 | VERBOSE (DEBUG, fprintf (stdout, "Configuring socket\n")); | |
9ff99d58 | 105 | #ifndef _WIN32 /* Posix */ |
00afbb65 LM |
106 | fcntl (sock, F_SETFL, O_NONBLOCK); |
107 | #endif | |
00afbb65 LM |
108 | rc = setsockopt (sock, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof (val)); |
109 | if (rc < 0) { | |
04a2223d | 110 | VERBOSE (ERROR, fprintf (stderr, "error: %s\n", "setsockopt/TCP_NODELAY")); |
00afbb65 | 111 | closesocket (sock); |
9ff99d58 | 112 | if (rc == SOCKET_ERROR) { |
04a2223d LM |
113 | VERBOSE (ERROR, fprintf (stderr, "error: close %d\n", ERRNO)); |
114 | } | |
115 | return -1; | |
116 | } | |
117 | ||
118 | rc = listen (sock, BACKLOG); | |
119 | if (rc < 0) { | |
120 | VERBOSE (ERROR, fprintf (stderr, "error: %s\n", "listen")); | |
121 | closesocket (sock); | |
122 | if (rc == SOCKET_ERROR) { | |
123 | VERBOSE (ERROR, fprintf (stderr, "error: close %d\n", ERRNO)); | |
9ff99d58 | 124 | } |
00afbb65 LM |
125 | return -1; |
126 | } | |
127 | ||
128 | return sock; | |
129 | } | |
130 | ||
04a2223d LM |
131 | /* accept incomming connection */ |
132 | ||
89f0e084 | 133 | socket_t accept_incoming_connection (socket_t sock) |
04a2223d | 134 | { |
89f0e084 | 135 | socket_t connection = accept (sock, NULL, 0); |
04a2223d | 136 | if (connection < 0) { |
89f0e084 | 137 | return INVALID_SOCKET; |
04a2223d LM |
138 | } |
139 | ||
140 | #ifndef _WIN32 /* POSIX */ | |
141 | fcntl (connection, F_SETFL, O_NONBLOCK); | |
142 | #endif | |
143 | int val = 1; | |
89f0e084 | 144 | int rc = setsockopt (connection, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof (val)); |
04a2223d LM |
145 | if (rc < 0) { |
146 | VERBOSE (ERROR, fprintf (stderr, "error: %s\n", "setsockopt/TCP_NODELAY")); | |
147 | closesocket (connection); | |
148 | if (rc == SOCKET_ERROR) { | |
149 | VERBOSE (ERROR, fprintf (stderr, "error: close %d\n", ERRNO)); | |
150 | } | |
89f0e084 | 151 | return INVALID_SOCKET; |
04a2223d LM |
152 | } |
153 | ||
154 | return connection; | |
155 | } | |
156 | ||
89f0e084 LM |
157 | /* close listening socket */ |
158 | ||
159 | void close_socket (socket_t sock) | |
04a2223d | 160 | { |
89f0e084 LM |
161 | int rc = closesocket (sock); |
162 | if (rc == SOCKET_ERROR) { | |
163 | VERBOSE (ERROR, fprintf (stderr, "error: %d\n", ERRNO)); | |
164 | } | |
165 | } | |
04a2223d | 166 | |
89f0e084 | 167 | /* receive data from socket */ |
04a2223d | 168 | |
89f0e084 LM |
169 | int receive_data (socket_t sock, unsigned char **pdata) |
170 | { | |
171 | unsigned char buffer[BUFFER_SIZE] = {0}; | |
172 | unsigned char *data = NULL; | |
173 | int len = 0; | |
04a2223d | 174 | |
89f0e084 | 175 | while (1) { |
04a2223d | 176 | |
89f0e084 LM |
177 | /* timeout management */ |
178 | fd_set rfds; | |
179 | struct timeval tv = { 0, TIMEOUT }; | |
180 | FD_ZERO (&rfds); | |
181 | FD_SET (sock, &rfds); | |
182 | ||
183 | int retval = select (sock + 1, &rfds, NULL, NULL, &tv); | |
184 | if (retval != 1) { /* 0 or SOCKET_ERROR */ | |
185 | break; | |
186 | } | |
04a2223d | 187 | |
89f0e084 LM |
188 | /* read from socket */ |
189 | int rc = read (sock, buffer, BUFFER_SIZE); | |
190 | ||
191 | if (rc == 0) { /* sock closed */ | |
192 | if (data) { | |
193 | free (data); | |
194 | data = NULL; | |
195 | len = 0; | |
196 | } | |
197 | break; | |
198 | ||
199 | } else if ((rc < 0) && (ERRNO != EAGAIN)) { /* error */ | |
200 | if (data) { | |
201 | free (data); | |
202 | data = NULL; | |
203 | } | |
204 | len = -1; | |
205 | break; | |
206 | ||
207 | } else if (rc > 0) { | |
208 | data = realloc (data, len + rc); | |
209 | memcpy (data + len, buffer, rc); | |
210 | len += rc; | |
211 | } | |
212 | } | |
04a2223d | 213 | |
89f0e084 LM |
214 | if (pdata != NULL) { |
215 | *pdata = data; | |
216 | } | |
217 | return len; | |
04a2223d LM |
218 | } |
219 | ||
89f0e084 LM |
220 | /* send data onto socket */ |
221 | ||
222 | int send_data (socket_t sock, unsigned char *data, int len) | |
223 | { | |
224 | int index = 0; | |
225 | ||
226 | while (index < len) { | |
227 | int rc = write (sock, data + index, len - index); | |
228 | ||
229 | if (rc == 0) { /* sock closed */ | |
230 | index = 0; | |
231 | break; | |
232 | } else if ((rc < 0) && (ERRNO != EAGAIN)) { /* error */ | |
233 | index = -1; | |
234 | break; | |
235 | } else if (rc > 0) { | |
236 | index += rc; | |
237 | } | |
238 | } | |
239 | ||
240 | return index; | |
241 | } | |
06ec8057 LM |
242 | |
243 | /* vim: set ts=4 sw=4 et: */ |