2 * Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL.
12 #include <sys/termios.h>
14 #include "kern_constants.h"
18 #include "um_malloc.h"
21 static int slip_user_init(void *data, void *dev)
23 struct slip_data *pri = data;
29 static int set_up_tty(int fd)
34 if (tcgetattr(fd, &tios) < 0) {
35 printk(UM_KERN_ERR "could not get initial terminal "
40 tios.c_cflag = CS8 | CREAD | HUPCL | CLOCAL;
41 tios.c_iflag = IGNBRK | IGNPAR;
44 for (i = 0; i < NCCS; i++)
49 cfsetospeed(&tios, B38400);
50 cfsetispeed(&tios, B38400);
52 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
53 printk(UM_KERN_ERR "failed to set terminal attributes\n");
59 struct slip_pre_exec_data {
65 static void slip_pre_exec(void *arg)
67 struct slip_pre_exec_data *data = arg;
71 dup2(data->stdout, 1);
72 if (data->close_me >= 0)
73 close(data->close_me);
76 static int slip_tramp(char **argv, int fd)
78 struct slip_pre_exec_data pe_data;
80 int status, pid, fds[2], err, output_len;
82 err = os_pipe(fds, 1, 0);
84 printk(UM_KERN_ERR "slip_tramp : pipe failed, err = %d\n",
91 pe_data.stdout = fds[1];
92 pe_data.close_me = fds[0];
93 err = run_helper(slip_pre_exec, &pe_data, argv);
98 output_len = UM_KERN_PAGE_SIZE;
99 output = kmalloc(output_len, UM_GFP_KERNEL);
100 if (output == NULL) {
101 printk(UM_KERN_ERR "slip_tramp : failed to allocate output "
103 os_kill_process(pid, 1);
109 read_output(fds[0], output, output_len);
110 printk("%s", output);
112 CATCH_EINTR(err = waitpid(pid, &status, 0));
115 else if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) {
116 printk(UM_KERN_ERR "'%s' didn't exit with status 0\n", argv[0]);
134 static int slip_open(void *data)
136 struct slip_data *pri = data;
137 char version_buf[sizeof("nnnnn\0")];
138 char gate_buf[sizeof("nnn.nnn.nnn.nnn\0")];
139 char *argv[] = { "uml_net", version_buf, "slip", "up", gate_buf,
145 printk(UM_KERN_ERR "slip-open : Failed to open pty, err = %d\n",
151 err = open(ptsname(mfd), O_RDWR, 0);
153 printk(UM_KERN_ERR "Couldn't open tty for slip line, "
165 if (pri->gate_addr != NULL) {
166 sprintf(version_buf, "%d", UML_NET_VERSION);
167 strcpy(gate_buf, pri->gate_addr);
169 err = slip_tramp(argv, sfd);
172 printk(UM_KERN_ERR "slip_tramp failed - err = %d\n",
176 err = os_get_ifname(pri->slave, pri->name);
178 printk(UM_KERN_ERR "get_ifname failed, err = %d\n",
182 iter_addresses(pri->dev, open_addr, pri->name);
185 err = os_set_slip(sfd);
187 printk(UM_KERN_ERR "Failed to set slip discipline "
188 "encapsulation - err = %d\n", -err);
201 static void slip_close(int fd, void *data)
203 struct slip_data *pri = data;
204 char version_buf[sizeof("nnnnn\0")];
205 char *argv[] = { "uml_net", version_buf, "slip", "down", pri->name,
209 if (pri->gate_addr != NULL)
210 iter_addresses(pri->dev, close_addr, pri->name);
212 sprintf(version_buf, "%d", UML_NET_VERSION);
214 err = slip_tramp(argv, pri->slave);
217 printk(UM_KERN_ERR "slip_tramp failed - errno = %d\n", -err);
223 int slip_user_read(int fd, void *buf, int len, struct slip_data *pri)
225 return slip_proto_read(fd, buf, len, &pri->slip);
228 int slip_user_write(int fd, void *buf, int len, struct slip_data *pri)
230 return slip_proto_write(fd, buf, len, &pri->slip);
233 static void slip_add_addr(unsigned char *addr, unsigned char *netmask,
236 struct slip_data *pri = data;
240 open_addr(addr, netmask, pri->name);
243 static void slip_del_addr(unsigned char *addr, unsigned char *netmask,
246 struct slip_data *pri = data;
250 close_addr(addr, netmask, pri->name);
253 const struct net_user_info slip_user_info = {
254 .init = slip_user_init,
258 .add_address = slip_add_addr,
259 .delete_address = slip_del_addr,
261 .max_packet = BUF_SIZE,