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![Alex Dewar](/assets/img/avatar_default.png)
Convert files to use SPDX header. All files are licensed under the GPLv2. Signed-off-by: Alex Dewar <alex.dewar@gmx.co.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
201 lines
3.7 KiB
C
201 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com)
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <termios.h>
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#include <unistd.h>
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#include <netinet/in.h>
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#include "chan_user.h"
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#include <os.h>
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#include "port.h"
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#include <um_malloc.h>
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struct port_chan {
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int raw;
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struct termios tt;
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void *kernel_data;
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char dev[sizeof("32768\0")];
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};
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static void *port_init(char *str, int device, const struct chan_opts *opts)
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{
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struct port_chan *data;
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void *kern_data;
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char *end;
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int port;
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if (*str != ':') {
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printk(UM_KERN_ERR "port_init : channel type 'port' must "
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"specify a port number\n");
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return NULL;
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}
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str++;
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port = strtoul(str, &end, 0);
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if ((*end != '\0') || (end == str)) {
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printk(UM_KERN_ERR "port_init : couldn't parse port '%s'\n",
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str);
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return NULL;
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}
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kern_data = port_data(port);
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if (kern_data == NULL)
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return NULL;
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data = uml_kmalloc(sizeof(*data), UM_GFP_KERNEL);
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if (data == NULL)
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goto err;
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*data = ((struct port_chan) { .raw = opts->raw,
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.kernel_data = kern_data });
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sprintf(data->dev, "%d", port);
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return data;
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err:
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port_kern_free(kern_data);
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return NULL;
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}
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static void port_free(void *d)
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{
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struct port_chan *data = d;
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port_kern_free(data->kernel_data);
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kfree(data);
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}
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static int port_open(int input, int output, int primary, void *d,
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char **dev_out)
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{
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struct port_chan *data = d;
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int fd, err;
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fd = port_wait(data->kernel_data);
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if ((fd >= 0) && data->raw) {
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CATCH_EINTR(err = tcgetattr(fd, &data->tt));
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if (err)
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return err;
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err = raw(fd);
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if (err)
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return err;
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}
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*dev_out = data->dev;
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return fd;
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}
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static void port_close(int fd, void *d)
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{
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struct port_chan *data = d;
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port_remove_dev(data->kernel_data);
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os_close_file(fd);
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}
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const struct chan_ops port_ops = {
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.type = "port",
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.init = port_init,
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.open = port_open,
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.close = port_close,
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.read = generic_read,
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.write = generic_write,
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.console_write = generic_console_write,
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.window_size = generic_window_size,
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.free = port_free,
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.winch = 1,
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};
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int port_listen_fd(int port)
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{
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struct sockaddr_in addr;
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int fd, err, arg;
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fd = socket(PF_INET, SOCK_STREAM, 0);
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if (fd == -1)
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return -errno;
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arg = 1;
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if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &arg, sizeof(arg)) < 0) {
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err = -errno;
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goto out;
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}
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addr.sin_family = AF_INET;
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addr.sin_port = htons(port);
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addr.sin_addr.s_addr = htonl(INADDR_ANY);
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if (bind(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
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err = -errno;
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goto out;
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}
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if (listen(fd, 1) < 0) {
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err = -errno;
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goto out;
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}
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err = os_set_fd_block(fd, 0);
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if (err < 0)
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goto out;
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return fd;
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out:
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close(fd);
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return err;
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}
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struct port_pre_exec_data {
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int sock_fd;
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int pipe_fd;
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};
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static void port_pre_exec(void *arg)
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{
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struct port_pre_exec_data *data = arg;
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dup2(data->sock_fd, 0);
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dup2(data->sock_fd, 1);
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dup2(data->sock_fd, 2);
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close(data->sock_fd);
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dup2(data->pipe_fd, 3);
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shutdown(3, SHUT_RD);
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close(data->pipe_fd);
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}
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int port_connection(int fd, int *socket, int *pid_out)
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{
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int new, err;
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char *argv[] = { "/usr/sbin/in.telnetd", "-L",
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OS_LIB_PATH "/uml/port-helper", NULL };
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struct port_pre_exec_data data;
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new = accept(fd, NULL, 0);
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if (new < 0)
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return -errno;
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err = os_pipe(socket, 0, 0);
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if (err < 0)
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goto out_close;
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data = ((struct port_pre_exec_data)
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{ .sock_fd = new,
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.pipe_fd = socket[1] });
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err = run_helper(port_pre_exec, &data, argv);
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if (err < 0)
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goto out_shutdown;
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*pid_out = err;
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return new;
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out_shutdown:
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shutdown(socket[0], SHUT_RDWR);
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close(socket[0]);
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shutdown(socket[1], SHUT_RDWR);
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close(socket[1]);
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out_close:
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close(new);
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return err;
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}
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