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
|
#include <stdio.h>
#include <gio/gio.h>
#include <string.h>
#include "response.h"
#include <stdlib.h>
#include <strings.h>
static int port = 3333;
#define BUFSIZE 1024
GMainContext *context=NULL;
GMainLoop *mainLoop=NULL;
GSocketConnection * connection = NULL;
GSocketClient * client = NULL;
char exitTokens[5][7] = {"quit", "exit", "logout", "logoff", "local"};
//helper function to nicely terminate the client
static void terminate(char *message, int exitCode)
{
g_object_unref(client);
g_object_unref(connection);
if (message) {
g_print("%s\n", message);
}
exit(exitCode);
}
//a sort of strncmp but with \n or \r exception
static gboolean Matches(char *src, char* dst, gssize size)
{
for(; *src != '\0', (size--)>0; src++) {
if(g_ascii_toupper(*src) != g_ascii_toupper(*dst)) {
return FALSE;
}
dst++;
}
for(; *dst != '\0'; dst++)
if (*dst != '\r' && *dst != '\n') {
return FALSE;
}
return TRUE;
}
//GIOChannel callback
static gboolean
stdinAvailable (GIOChannel *source, GIOCondition condition, gpointer data)
{
char tmp[BUFSIZE];
memset(tmp,0,BUFSIZE);
int size = read(0, tmp, BUFSIZE);
if(size<=0) {
return TRUE;
}
//test if we have an exit word
int idx=0;
for(idx=0; idx<sizeof(exitTokens)/sizeof(exitTokens[0]); idx++) {
if(Matches(exitTokens[idx], tmp, strlen(exitTokens[idx]))) {
g_socket_close(g_socket_connection_get_socket(connection), NULL);
terminate("Goodbye", 0);
}
}
//write the message
gssize written=0;
GPollableOutputStream* out = (GPollableOutputStream*)data;
written = g_pollable_output_stream_write_nonblocking(out, tmp, size, NULL, NULL);
if (written <=0 || written == G_IO_ERROR_WOULD_BLOCK) {
return FALSE;
}
return TRUE;
}
//callback for server input
static gboolean cbServerInput(gpointer data, gpointer additional)
{
char buffer[BUFSIZE];
gssize size=0;
memset(buffer,0,BUFSIZE);
GPollableInputStream* inStream = (GPollableInputStream*)data;
size=g_pollable_input_stream_read_nonblocking(inStream, buffer, BUFSIZE, NULL, NULL);
if(size <=0 || size == G_IO_ERROR_WOULD_BLOCK) {
terminate("Connection to server lost", -1);
}
g_print("\n%s", buffer);
g_print("> ");
return TRUE;
}
int main(int argc, char** argv)
{
/* create a new connection */
g_type_init ();
GOutputStream *out;
GInputStream *in;
GError* error = NULL;
GIOChannel* stdinChannel = NULL;
client = g_socket_client_new();
GSource *source = NULL;
/* connect to the host */
connection = g_socket_client_connect_to_host (client,
(gchar*)"localhost",
port,
NULL,
&error);
if (error != NULL) {
g_print("Could not connect to server on port %d\n", port);
g_object_unref(client);
return -1;
}
g_print("> ");
//register Pollable sources
out = g_io_stream_get_output_stream (G_IO_STREAM (connection));
in = g_io_stream_get_input_stream (G_IO_STREAM (connection));
GSource *outSource = NULL;
GSource *inSource = g_pollable_input_stream_create_source((struct GPollableInputStream*)in, NULL);
outSource = g_pollable_output_stream_create_source((struct GPollableOutputStream*)out, NULL);
//register stdin channel
stdinChannel = g_io_channel_unix_new(0);
if(stdinChannel == NULL) {
terminate("Could not open STDIN channel", -2);
}
//attach the sources
g_io_add_watch(stdinChannel, G_IO_IN, stdinAvailable, (struct GPollableOutputStream*)out);
g_source_set_callback(inSource, cbServerInput, (GPollableOutputStream*)in, NULL);
g_source_attach(inSource, NULL);
g_main_loop_run (g_main_loop_new (NULL, FALSE));
return 0;
}
|
