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