2 * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com)
3 * Licensed under the GPL
11 #include <netinet/in.h>
12 #include "chan_user.h"
13 #include "kern_constants.h"
16 #include "um_malloc.h"
23 char dev[sizeof("32768\0")];
26 static void *port_init(char *str, int device, const struct chan_opts *opts)
28 struct port_chan *data;
34 printk(UM_KERN_ERR "port_init : channel type 'port' must "
35 "specify a port number\n");
39 port = strtoul(str, &end, 0);
40 if ((*end != '\0') || (end == str)) {
41 printk(UM_KERN_ERR "port_init : couldn't parse port '%s'\n",
46 kern_data = port_data(port);
47 if (kern_data == NULL)
50 data = uml_kmalloc(sizeof(*data), UM_GFP_KERNEL);
54 *data = ((struct port_chan) { .raw = opts->raw,
55 .kernel_data = kern_data });
56 sprintf(data->dev, "%d", port);
60 port_kern_free(kern_data);
64 static void port_free(void *d)
66 struct port_chan *data = d;
68 port_kern_free(data->kernel_data);
72 static int port_open(int input, int output, int primary, void *d,
75 struct port_chan *data = d;
78 fd = port_wait(data->kernel_data);
79 if ((fd >= 0) && data->raw) {
80 CATCH_EINTR(err = tcgetattr(fd, &data->tt));
92 static void port_close(int fd, void *d)
94 struct port_chan *data = d;
96 port_remove_dev(data->kernel_data);
100 const struct chan_ops port_ops = {
105 .read = generic_read,
106 .write = generic_write,
107 .console_write = generic_console_write,
108 .window_size = generic_window_size,
113 int port_listen_fd(int port)
115 struct sockaddr_in addr;
118 fd = socket(PF_INET, SOCK_STREAM, 0);
123 if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &arg, sizeof(arg)) < 0) {
128 addr.sin_family = AF_INET;
129 addr.sin_port = htons(port);
130 addr.sin_addr.s_addr = htonl(INADDR_ANY);
131 if (bind(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
136 if (listen(fd, 1) < 0) {
141 err = os_set_fd_block(fd, 0);
151 struct port_pre_exec_data {
156 static void port_pre_exec(void *arg)
158 struct port_pre_exec_data *data = arg;
160 dup2(data->sock_fd, 0);
161 dup2(data->sock_fd, 1);
162 dup2(data->sock_fd, 2);
163 close(data->sock_fd);
164 dup2(data->pipe_fd, 3);
165 shutdown(3, SHUT_RD);
166 close(data->pipe_fd);
169 int port_connection(int fd, int *socket, int *pid_out)
172 char *argv[] = { "/usr/sbin/in.telnetd", "-L",
173 "/usr/lib/uml/port-helper", NULL };
174 struct port_pre_exec_data data;
176 new = accept(fd, NULL, 0);
180 err = os_pipe(socket, 0, 0);
184 data = ((struct port_pre_exec_data)
186 .pipe_fd = socket[1] });
188 err = run_helper(port_pre_exec, &data, argv);
196 shutdown(socket[0], SHUT_RDWR);
198 shutdown(socket[1], SHUT_RDWR);