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
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <err.h>
#include <errno.h>
#include <netinet/in.h>
#include <event.h>
#include "libglouglou.h"
/* Server - private */
void cb_srv_receive(evutil_socket_t fd, short what, void *arg);
void cb_cli_receive(evutil_socket_t fd, short what, void *arg);
/*
* Server
*/
/*
* start a server
*/
struct gg_server *
gg_server_start(struct event_base *ev_base, char *ip, int port,
int (*handle_conn)(struct gg_server *s, int client_id, struct sockaddr_in *addr),
int (*handle_packet)(struct gg_server *s, struct gg_packet *p))
{
struct gg_server *srv;
struct sockaddr_in sock_addr;
struct event *ev;
int s;
int sock_on = 1;
event_init(); /* XXX needed ? */
srv = xcalloc(1, sizeof(struct gg_server));
srv->ip = ip;
srv->port = port;
s = socket(AF_INET, SOCK_DGRAM, 0);
if (s < 0)
goto err;
srv->sock = s;
setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
&sock_on, sizeof(sock_on));
fd_nonblock(s);
bzero(&sock_addr, sizeof(sock_addr));
sock_addr.sin_family = AF_INET;
sock_addr.sin_addr.s_addr = inet_addr(ip);
sock_addr.sin_port = htons(port);
if (bind(s, (struct sockaddr *)&sock_addr,
sizeof(sock_addr)) != 0)
goto err;
ev = event_new(ev_base, s, EV_READ|EV_PERSIST, cb_srv_receive, srv);
event_add(ev, NULL);
srv->ev = ev;
return srv;
err:
printf("libglouglou: gg_server_start: Error ! %s",
strerror(errno));
gg_server_stop(srv);
return NULL;
}
int
gg_server_send(struct gg_server *s, int client_id, struct gg_packet *p)
{
return -1;
}
void
gg_server_stop(struct gg_server *srv)
{
if (srv->ev)
event_del(srv->ev);
if (srv->sock)
close(srv->sock);
free(srv);
}
/*
* Server - private
*/
void cb_srv_receive(evutil_socket_t fd, short what, void *arg)
{
printf("srv: Incoming data !\n");
}
/*
* Client
*/
/*
* connect to a server
*/
struct gg_client *
gg_client_connect(struct event_base *ev_base, char *ip, int port,
int (*handle_conn)(struct gg_client *c, int status),
int (*handle_packet)(struct gg_client *c, struct gg_packet *p))
{
struct gg_client *cli;
struct sockaddr_in sock_addr;
struct event *ev;
int s;
int sock_on = 1;
event_init(); /* XXX needed ? */
cli = xmalloc(sizeof(struct gg_client));
cli->ip = ip;
cli->port = port;
s = socket(AF_INET, SOCK_DGRAM, 0);
if (s < 0)
goto err;
cli->sock = s;
setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
&sock_on, sizeof(sock_on));
fd_nonblock(s);
bzero(&sock_addr, sizeof(sock_addr));
sock_addr.sin_family = AF_INET;
sock_addr.sin_addr.s_addr=inet_addr(ip);
sock_addr.sin_port=htons(port);
ev = event_new(ev_base, s, EV_READ|EV_PERSIST, cb_cli_receive, cli);
event_add(ev, NULL);
cli->ev = ev;
sendto(s, "", strlen(""), 0,
(struct sockaddr *)&sock_addr, sizeof(struct sockaddr));
return cli;
err:
printf("libglouglou: gg_client_connect: Error ! %s",
strerror(errno));
gg_client_disconnect(cli);
return NULL;
}
int
gg_client_send(struct gg_client *c, struct gg_packet *p)
{
return -1;
}
void
gg_client_disconnect(struct gg_client *cli)
{
if (cli->ev)
event_del(cli->ev);
if (cli->sock)
close(cli->sock);
free(cli);
}
/*
* Client - private
*/
void cb_cli_receive(evutil_socket_t fd, short what, void *arg)
{
printf("cli: Incoming data !\n");
}
/*
* Utils
*/
void *
xmalloc(size_t size)
{
void *data;
data = malloc(size);
if (!data)
err(1, "could not malloc %d", (int)size);
return data;
}
void *
xcalloc(size_t nmemb, size_t size)
{
void *data;
data = calloc(nmemb, size);
if (!data)
err(1, "could not calloc %d", (int)size);
return data;
}
void
fd_nonblock(int fd)
{
int flags = fcntl(fd, F_GETFL, 0);
int rc = fcntl(fd, F_SETFL, flags | O_NONBLOCK);
if (rc == -1)
printf("failed to set fd %i non-blocking", fd);
}
|
