e454916149
Pull out routines for interacting with the server and interpreting internal commands which are not dependent on libreadline and ncurses libraries. This is a preparation step for a new lightweight birdc client.
180 lines
3.3 KiB
C
180 lines
3.3 KiB
C
/*
|
|
* 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;
|
|
}
|
|
}
|
|
}
|