/*
|
* Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
|
* Licensed under the GPL.
|
*/
|
|
#include <unistd.h>
|
#include <errno.h>
|
#include <string.h>
|
#include <sys/wait.h>
|
#include <net_user.h>
|
#include <os.h>
|
#include "slirp.h"
|
|
static int slirp_user_init(void *data, void *dev)
|
{
|
struct slirp_data *pri = data;
|
|
pri->dev = dev;
|
return 0;
|
}
|
|
struct slirp_pre_exec_data {
|
int stdin_fd;
|
int stdout_fd;
|
};
|
|
static void slirp_pre_exec(void *arg)
|
{
|
struct slirp_pre_exec_data *data = arg;
|
|
if (data->stdin_fd != -1)
|
dup2(data->stdin_fd, 0);
|
if (data->stdout_fd != -1)
|
dup2(data->stdout_fd, 1);
|
}
|
|
static int slirp_tramp(char **argv, int fd)
|
{
|
struct slirp_pre_exec_data pe_data;
|
int pid;
|
|
pe_data.stdin_fd = fd;
|
pe_data.stdout_fd = fd;
|
pid = run_helper(slirp_pre_exec, &pe_data, argv);
|
|
return pid;
|
}
|
|
static int slirp_open(void *data)
|
{
|
struct slirp_data *pri = data;
|
int fds[2], pid, err;
|
|
err = os_pipe(fds, 1, 1);
|
if (err)
|
return err;
|
|
err = slirp_tramp(pri->argw.argv, fds[1]);
|
if (err < 0) {
|
printk(UM_KERN_ERR "slirp_tramp failed - errno = %d\n", -err);
|
goto out;
|
}
|
pid = err;
|
|
pri->slave = fds[1];
|
pri->slip.pos = 0;
|
pri->slip.esc = 0;
|
pri->pid = err;
|
|
return fds[0];
|
out:
|
close(fds[0]);
|
close(fds[1]);
|
return err;
|
}
|
|
static void slirp_close(int fd, void *data)
|
{
|
struct slirp_data *pri = data;
|
int err;
|
|
close(fd);
|
close(pri->slave);
|
|
pri->slave = -1;
|
|
if (pri->pid<1) {
|
printk(UM_KERN_ERR "slirp_close: no child process to shut "
|
"down\n");
|
return;
|
}
|
|
#if 0
|
if (kill(pri->pid, SIGHUP)<0) {
|
printk(UM_KERN_ERR "slirp_close: sending hangup to %d failed "
|
"(%d)\n", pri->pid, errno);
|
}
|
#endif
|
err = helper_wait(pri->pid);
|
if (err < 0)
|
return;
|
|
pri->pid = -1;
|
}
|
|
int slirp_user_read(int fd, void *buf, int len, struct slirp_data *pri)
|
{
|
return slip_proto_read(fd, buf, len, &pri->slip);
|
}
|
|
int slirp_user_write(int fd, void *buf, int len, struct slirp_data *pri)
|
{
|
return slip_proto_write(fd, buf, len, &pri->slip);
|
}
|
|
const struct net_user_info slirp_user_info = {
|
.init = slirp_user_init,
|
.open = slirp_open,
|
.close = slirp_close,
|
.remove = NULL,
|
.add_address = NULL,
|
.delete_address = NULL,
|
.mtu = BUF_SIZE,
|
.max_packet = BUF_SIZE,
|
};
|
