/* * Copyright (C) 2001 Jeff Dike (jdike@karaya.com) * Licensed under the GPL */ #include <stdio.h> #include <stddef.h> #include <stdlib.h> #include <string.h> #include <errno.h> #include <unistd.h> #include <termios.h> #include <sys/socket.h> #include <sys/un.h> #include <netinet/in.h> #include "user_util.h" #include "kern_util.h" #include "user.h" #include "chan_user.h" #include "port.h" #include "os.h" #include "um_malloc.h" struct port_chan { int raw; struct termios tt; void *kernel_data; char dev[sizeof("32768\0")]; }; static void *port_init(char *str, int device, const struct chan_opts *opts) { struct port_chan *data; void *kern_data; char *end; int port; if(*str != ':'){ printk("port_init : channel type 'port' must specify a " "port number\n"); return(NULL); } str++; port = strtoul(str, &end, 0); if((*end != '\0') || (end == str)){ printk("port_init : couldn't parse port '%s'\n", str); return(NULL); } kern_data = port_data(port); if(kern_data == NULL) return(NULL); data = um_kmalloc(sizeof(*data)); if(data == NULL) goto err; *data = ((struct port_chan) { .raw = opts->raw, .kernel_data = kern_data }); sprintf(data->dev, "%d", port); return(data); err: port_kern_free(kern_data); return(NULL); } static void port_free(void *d) { struct port_chan *data = d; port_kern_free(data->kernel_data); kfree(data); } static int port_open(int input, int output, int primary, void *d, char **dev_out) { struct port_chan *data = d; int fd, err; fd = port_wait(data->kernel_data); if((fd >= 0) && data->raw){ CATCH_EINTR(err = tcgetattr(fd, &data->tt)); if(err) return(err); err = raw(fd); if(err) return(err); } *dev_out = data->dev; return(fd); } static void port_close(int fd, void *d) { struct port_chan *data = d; port_remove_dev(data->kernel_data); os_close_file(fd); } const struct chan_ops port_ops = { .type = "port", .init = port_init, .open = port_open, .close = port_close, .read = generic_read, .write = generic_write, .console_write = generic_console_write, .window_size = generic_window_size, .free = port_free, .winch = 1, }; int port_listen_fd(int port) { struct sockaddr_in addr; int fd, err, arg; fd = socket(PF_INET, SOCK_STREAM, 0); if(fd == -1) return(-errno); arg = 1; if(setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &arg, sizeof(arg)) < 0){ err = -errno; goto out; } addr.sin_family = AF_INET; addr.sin_port = htons(port); addr.sin_addr.s_addr = htonl(INADDR_ANY); if(bind(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0){ err = -errno; goto out; } if(listen(fd, 1) < 0){ err = -errno; goto out; } err = os_set_fd_block(fd, 0); if(err < 0) goto out; return(fd); out: os_close_file(fd); return(err); } struct port_pre_exec_data { int sock_fd; int pipe_fd; }; void port_pre_exec(void *arg) { struct port_pre_exec_data *data = arg; dup2(data->sock_fd, 0); dup2(data->sock_fd, 1); dup2(data->sock_fd, 2); os_close_file(data->sock_fd); dup2(data->pipe_fd, 3); os_shutdown_socket(3, 1, 0); os_close_file(data->pipe_fd); } int port_connection(int fd, int *socket, int *pid_out) { int new, err; char *argv[] = { "/usr/sbin/in.telnetd", "-L", "/usr/lib/uml/port-helper", NULL }; struct port_pre_exec_data data; new = os_accept_connection(fd); if(new < 0) return(new); err = os_pipe(socket, 0, 0); if(err < 0) goto out_close; data = ((struct port_pre_exec_data) { .sock_fd = new, .pipe_fd = socket[1] }); err = run_helper(port_pre_exec, &data, argv, NULL); if(err < 0) goto out_shutdown; *pid_out = err; return(new); out_shutdown: os_shutdown_socket(socket[0], 1, 1); os_close_file(socket[0]); os_shutdown_socket(socket[1], 1, 1); os_close_file(socket[1]); out_close: os_close_file(new); return(err); } /* * Overrides for Emacs so that we follow Linus's tabbing style. * Emacs will notice this stuff at the end of the file and automatically * adjust the settings for this buffer only. This must remain at the end * of the file. * --------------------------------------------------------------------------- * Local variables: * c-file-style: "linux" * End: */