Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2001 Jeff Dike (jdike@karaya.com) |
| 3 | * Licensed under the GPL |
| 4 | */ |
| 5 | |
| 6 | #include <stdio.h> |
| 7 | #include <stddef.h> |
| 8 | #include <stdlib.h> |
| 9 | #include <string.h> |
| 10 | #include <errno.h> |
| 11 | #include <unistd.h> |
| 12 | #include <termios.h> |
| 13 | #include <sys/socket.h> |
| 14 | #include <sys/un.h> |
| 15 | #include <netinet/in.h> |
| 16 | #include "user_util.h" |
| 17 | #include "kern_util.h" |
| 18 | #include "user.h" |
| 19 | #include "chan_user.h" |
| 20 | #include "port.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include "os.h" |
Paolo 'Blaisorblade' Giarrusso | c13e569 | 2006-10-19 23:28:20 -0700 | [diff] [blame] | 22 | #include "um_malloc.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
| 24 | struct port_chan { |
| 25 | int raw; |
| 26 | struct termios tt; |
| 27 | void *kernel_data; |
| 28 | char dev[sizeof("32768\0")]; |
| 29 | }; |
| 30 | |
Jeff Dike | 5e7672e | 2006-09-27 01:50:33 -0700 | [diff] [blame] | 31 | static void *port_init(char *str, int device, const struct chan_opts *opts) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | { |
| 33 | struct port_chan *data; |
| 34 | void *kern_data; |
| 35 | char *end; |
| 36 | int port; |
| 37 | |
| 38 | if(*str != ':'){ |
| 39 | printk("port_init : channel type 'port' must specify a " |
| 40 | "port number\n"); |
| 41 | return(NULL); |
| 42 | } |
| 43 | str++; |
| 44 | port = strtoul(str, &end, 0); |
| 45 | if((*end != '\0') || (end == str)){ |
| 46 | printk("port_init : couldn't parse port '%s'\n", str); |
| 47 | return(NULL); |
| 48 | } |
| 49 | |
| 50 | kern_data = port_data(port); |
| 51 | if(kern_data == NULL) |
| 52 | return(NULL); |
| 53 | |
| 54 | data = um_kmalloc(sizeof(*data)); |
| 55 | if(data == NULL) |
| 56 | goto err; |
| 57 | |
| 58 | *data = ((struct port_chan) { .raw = opts->raw, |
| 59 | .kernel_data = kern_data }); |
| 60 | sprintf(data->dev, "%d", port); |
| 61 | |
| 62 | return(data); |
| 63 | err: |
| 64 | port_kern_free(kern_data); |
| 65 | return(NULL); |
| 66 | } |
| 67 | |
| 68 | static void port_free(void *d) |
| 69 | { |
| 70 | struct port_chan *data = d; |
| 71 | |
| 72 | port_kern_free(data->kernel_data); |
| 73 | kfree(data); |
| 74 | } |
| 75 | |
| 76 | static int port_open(int input, int output, int primary, void *d, |
| 77 | char **dev_out) |
| 78 | { |
| 79 | struct port_chan *data = d; |
| 80 | int fd, err; |
| 81 | |
| 82 | fd = port_wait(data->kernel_data); |
| 83 | if((fd >= 0) && data->raw){ |
| 84 | CATCH_EINTR(err = tcgetattr(fd, &data->tt)); |
| 85 | if(err) |
| 86 | return(err); |
| 87 | |
| 88 | err = raw(fd); |
| 89 | if(err) |
| 90 | return(err); |
| 91 | } |
| 92 | *dev_out = data->dev; |
| 93 | return(fd); |
| 94 | } |
| 95 | |
| 96 | static void port_close(int fd, void *d) |
| 97 | { |
| 98 | struct port_chan *data = d; |
| 99 | |
| 100 | port_remove_dev(data->kernel_data); |
| 101 | os_close_file(fd); |
| 102 | } |
| 103 | |
Jeff Dike | 5e7672e | 2006-09-27 01:50:33 -0700 | [diff] [blame] | 104 | const struct chan_ops port_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | .type = "port", |
| 106 | .init = port_init, |
| 107 | .open = port_open, |
| 108 | .close = port_close, |
| 109 | .read = generic_read, |
| 110 | .write = generic_write, |
Paolo 'Blaisorblade' Giarrusso | fd9bc53 | 2005-11-13 16:07:10 -0800 | [diff] [blame] | 111 | .console_write = generic_console_write, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | .window_size = generic_window_size, |
| 113 | .free = port_free, |
| 114 | .winch = 1, |
| 115 | }; |
| 116 | |
| 117 | int port_listen_fd(int port) |
| 118 | { |
| 119 | struct sockaddr_in addr; |
| 120 | int fd, err, arg; |
| 121 | |
| 122 | fd = socket(PF_INET, SOCK_STREAM, 0); |
| 123 | if(fd == -1) |
| 124 | return(-errno); |
| 125 | |
| 126 | arg = 1; |
| 127 | if(setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &arg, sizeof(arg)) < 0){ |
| 128 | err = -errno; |
| 129 | goto out; |
| 130 | } |
| 131 | |
| 132 | addr.sin_family = AF_INET; |
| 133 | addr.sin_port = htons(port); |
| 134 | addr.sin_addr.s_addr = htonl(INADDR_ANY); |
| 135 | if(bind(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0){ |
| 136 | err = -errno; |
| 137 | goto out; |
| 138 | } |
| 139 | |
| 140 | if(listen(fd, 1) < 0){ |
| 141 | err = -errno; |
| 142 | goto out; |
| 143 | } |
| 144 | |
| 145 | err = os_set_fd_block(fd, 0); |
| 146 | if(err < 0) |
| 147 | goto out; |
| 148 | |
| 149 | return(fd); |
| 150 | out: |
| 151 | os_close_file(fd); |
| 152 | return(err); |
| 153 | } |
| 154 | |
| 155 | struct port_pre_exec_data { |
| 156 | int sock_fd; |
| 157 | int pipe_fd; |
| 158 | }; |
| 159 | |
| 160 | void port_pre_exec(void *arg) |
| 161 | { |
| 162 | struct port_pre_exec_data *data = arg; |
| 163 | |
| 164 | dup2(data->sock_fd, 0); |
| 165 | dup2(data->sock_fd, 1); |
| 166 | dup2(data->sock_fd, 2); |
| 167 | os_close_file(data->sock_fd); |
| 168 | dup2(data->pipe_fd, 3); |
| 169 | os_shutdown_socket(3, 1, 0); |
| 170 | os_close_file(data->pipe_fd); |
| 171 | } |
| 172 | |
| 173 | int port_connection(int fd, int *socket, int *pid_out) |
| 174 | { |
| 175 | int new, err; |
| 176 | char *argv[] = { "/usr/sbin/in.telnetd", "-L", |
| 177 | "/usr/lib/uml/port-helper", NULL }; |
| 178 | struct port_pre_exec_data data; |
| 179 | |
| 180 | new = os_accept_connection(fd); |
| 181 | if(new < 0) |
| 182 | return(new); |
| 183 | |
| 184 | err = os_pipe(socket, 0, 0); |
| 185 | if(err < 0) |
| 186 | goto out_close; |
| 187 | |
| 188 | data = ((struct port_pre_exec_data) |
| 189 | { .sock_fd = new, |
| 190 | .pipe_fd = socket[1] }); |
| 191 | |
| 192 | err = run_helper(port_pre_exec, &data, argv, NULL); |
| 193 | if(err < 0) |
| 194 | goto out_shutdown; |
| 195 | |
| 196 | *pid_out = err; |
| 197 | return(new); |
| 198 | |
| 199 | out_shutdown: |
| 200 | os_shutdown_socket(socket[0], 1, 1); |
| 201 | os_close_file(socket[0]); |
| 202 | os_shutdown_socket(socket[1], 1, 1); |
| 203 | os_close_file(socket[1]); |
| 204 | out_close: |
| 205 | os_close_file(new); |
| 206 | return(err); |
| 207 | } |
| 208 | |
| 209 | /* |
| 210 | * Overrides for Emacs so that we follow Linus's tabbing style. |
| 211 | * Emacs will notice this stuff at the end of the file and automatically |
| 212 | * adjust the settings for this buffer only. This must remain at the end |
| 213 | * of the file. |
| 214 | * --------------------------------------------------------------------------- |
| 215 | * Local variables: |
| 216 | * c-file-style: "linux" |
| 217 | * End: |
| 218 | */ |