/
net-unix.c
executable file
·149 lines (128 loc) · 3.79 KB
/
net-unix.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
#include "net-unix.h"
int g_maxFd = 0;
sig_t g_oldSignal = NULL;
void sigpipe_handler(int i)
{
// do nothing on SIGPIPE
}
int netStartupUnix()
{
struct rlimit rlim;
getrlimit(RLIMIT_NOFILE, &rlim);
g_maxFd = rlim.rlim_cur;
g_oldSignal = signal(SIGPIPE, sigpipe_handler);
if (g_oldSignal == SIG_ERR) return -NET_STARTUP_FAILED;
return 0;
}
int netCleanupUnix()
{
sig_t s = signal(SIGPIPE, g_oldSignal);
if (s == SIG_ERR) return -NET_CLEANUP_FAILED;
return 0;
}
int netCreateSocket(int* socketHandle)
{
*socketHandle = (int) socket(AF_INET, SOCK_STREAM, 0);
if (*socketHandle == -1) return -NET_CREATE_SOCKET_FAILED;
if (addNotifications(*socketHandle) == -1) return -NET_CREATE_SOCKET_FAILED;
return 0;
}
int netCreateServerSocket(const char* address, int port, int* socketHandle)
{
struct sockaddr_in local_addr;
int param = 1;
// open new socket
*socketHandle = (int) socket(AF_INET, SOCK_STREAM, 0);
if (*socketHandle == -1) return -NET_CREATE_SOCKET_FAILED;
// avoid EADDRINUSE error on bind()
setsockopt(*socketHandle, SOL_SOCKET, SO_REUSEADDR, (char *)¶m, sizeof(param));
// bind the socket
local_addr.sin_family = AF_INET;
local_addr.sin_port = htons(port);
memset(&(local_addr.sin_zero), 0, sizeof(local_addr.sin_zero));
if (address) {
struct hostent *host;
if ((host = gethostbyname(address)) == NULL) {
return -NET_GET_HOST_BY_NAME_FAILED;
}
local_addr.sin_addr.s_addr = *((unsigned long *) host->h_addr);
} else {
local_addr.sin_addr.s_addr = htonl(INADDR_ANY);
}
if (bind(*socketHandle, (struct sockaddr *) &local_addr, sizeof(struct sockaddr)) < 0) return -NET_BIND_FAILED;
if (addNotifications(*socketHandle) == -1) return -NET_CREATE_SOCKET_FAILED;
return 0;
}
int netListen(int serverSocket, int backlog)
{
if (listen(serverSocket, backlog) < 0) return -NET_LISTEN_FAILED;
return 0;
}
int netConnect(int socket, const char* address, int port)
{
struct sockaddr_in serv_addr;
int error;
serv_addr.sin_family = AF_INET;
serv_addr.sin_port = htons(port);
memset(&(serv_addr.sin_zero), 0, sizeof(serv_addr.sin_zero));
struct hostent *host;
if ((host = gethostbyname(address)) == NULL) {
return -NET_GET_HOST_BY_NAME_FAILED;
}
serv_addr.sin_addr.s_addr = *((unsigned long *) host->h_addr);
error = connect(socket, (struct sockaddr *) &serv_addr, sizeof(struct sockaddr));
if (error < 0) {
if (errno != EINPROGRESS) return -NET_CONNECT_FAILED;
}
return 0;
}
int netAccept(int serverSocket, char** ipAddress, int *socketHandle)
{
// accept connection
struct sockaddr_in client_addr;
socklen_t addrLen = sizeof(struct sockaddr_in);
*socketHandle = (int) accept(serverSocket, ipAddress ? (struct sockaddr*) &client_addr : NULL, ipAddress ? &addrLen : NULL);
if (*socketHandle == -1) return -NET_ACCEPT_FAILED;
// get client address, if requested
if (ipAddress) *ipAddress = strdup(inet_ntoa(client_addr.sin_addr));
if (addNotifications(*socketHandle) == -1) return -NET_ACCEPT_FAILED;
return 0;
}
int netCloseSocket(int socket)
{
if (close(socket) != 0) {
return -NET_CLOSE_SOCKET_FAILED;
}
return 0;
}
int netWrite(int socket, const void* data, int size)
{
int result = send(socket, (char*) data, size, 0);
if (result >= 0) {
return result;
} else {
if (errno == EAGAIN) {
enableWriteNotifications(socket);
return -NET_WOULD_BLOCK;
} else {
return -NET_WRITE_FAILED;
}
}
}
int netRead(int socket, void* data, int size)
{
int result = recv(socket, (char*) data, size, 0);
if (result >= 0) {
return result;
} else {
if (errno == EINPROGRESS) {
return -NET_WOULD_BLOCK;
} else {
return -NET_READ_FAILED;
}
}
}
void netSleep(int milliseconds)
{
usleep(milliseconds * 1000);
}