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
|
/*
* BIRD Client
*
* (c) 1999--2004 Martin Mares <mj@ucw.cz>
* (c) 2013 Tomas Hlavacek <tmshlvck@gmail.com>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/types.h>
#include "nest/bird.h"
#include "lib/resource.h"
#include "lib/string.h"
#include "client/client.h"
#include "sysdep/unix/unix.h"
char *server_path = PATH_CONTROL_SOCKET;
int server_fd;
byte server_read_buf[SERVER_READ_BUF_LEN];
byte *server_read_pos = server_read_buf;
int input_initialized;
int input_hidden_end;
int cstate = STATE_CMD_SERVER;
int nstate = STATE_CMD_SERVER;
int num_lines, skip_input, interactive;
/*** Input ***/
int
handle_internal_command(char *cmd)
{
if (!strncmp(cmd, "exit", 4) || !strncmp(cmd, "quit", 4))
{
cleanup();
exit(0);
}
if (!strncmp(cmd, "help", 4))
{
puts("Press `?' for context sensitive help.");
return 1;
}
return 0;
}
void
submit_server_command(char *cmd)
{
server_send(cmd);
nstate = STATE_CMD_SERVER;
num_lines = 2;
}
/*** Communication with server ***/
void
server_connect(void)
{
struct sockaddr_un sa;
server_fd = socket(AF_UNIX, SOCK_STREAM, 0);
if (server_fd < 0)
die("Cannot create socket: %m");
if (strlen(server_path) >= sizeof(sa.sun_path))
die("server_connect: path too long");
bzero(&sa, sizeof(sa));
sa.sun_family = AF_UNIX;
strcpy(sa.sun_path, server_path);
if (connect(server_fd, (struct sockaddr *) &sa, SUN_LEN(&sa)) < 0)
die("Unable to connect to server control socket (%s): %m", server_path);
if (fcntl(server_fd, F_SETFL, O_NONBLOCK) < 0)
die("fcntl: %m");
}
void
server_read(void)
{
int c;
byte *start, *p;
redo:
c = read(server_fd, server_read_pos, server_read_buf + sizeof(server_read_buf) - server_read_pos);
if (!c)
die("Connection closed by server.");
if (c < 0)
{
if (errno == EINTR)
goto redo;
else
die("Server read error: %m");
}
start = server_read_buf;
p = server_read_pos;
server_read_pos += c;
while (p < server_read_pos)
if (*p++ == '\n')
{
p[-1] = 0;
server_got_reply(start);
start = p;
}
if (start != server_read_buf)
{
int l = server_read_pos - start;
memmove(server_read_buf, start, l);
server_read_pos = server_read_buf + l;
}
else if (server_read_pos == server_read_buf + sizeof(server_read_buf))
{
strcpy(server_read_buf, "?<too-long>");
server_read_pos = server_read_buf + 11;
}
}
void
wait_for_write(int fd)
{
while (1)
{
int rv;
fd_set set;
FD_ZERO(&set);
FD_SET(fd, &set);
rv = select(fd+1, NULL, &set, NULL, NULL);
if (rv < 0)
{
if (errno == EINTR)
continue;
else
die("select: %m");
}
if (FD_ISSET(server_fd, &set))
return;
}
}
void
server_send(char *cmd)
{
int l = strlen(cmd);
byte *z = alloca(l + 1);
memcpy(z, cmd, l);
z[l++] = '\n';
while (l)
{
int cnt = write(server_fd, z, l);
if (cnt < 0)
{
if (errno == EAGAIN)
wait_for_write(server_fd);
else if (errno == EINTR)
continue;
else
die("Server write error: %m");
}
else
{
l -= cnt;
z += cnt;
}
}
}
|
