8 #include <sys/termios.h>
10 #include <sys/signal.h>
11 #include "kern_util.h"
15 #include "slip_common.h"
17 #include "um_malloc.h"
18 #include "kern_constants.h"
20 static int slip_user_init(void *data, void *dev)
22 struct slip_data *pri = data;
28 static int set_up_tty(int fd)
33 if (tcgetattr(fd, &tios) < 0) {
34 printk("could not get initial terminal attributes\n");
38 tios.c_cflag = CS8 | CREAD | HUPCL | CLOCAL;
39 tios.c_iflag = IGNBRK | IGNPAR;
42 for (i = 0; i < NCCS; i++)
47 cfsetospeed(&tios, B38400);
48 cfsetispeed(&tios, B38400);
50 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
51 printk("failed to set terminal attributes\n");
57 struct slip_pre_exec_data {
63 static void slip_pre_exec(void *arg)
65 struct slip_pre_exec_data *data = arg;
67 if(data->stdin >= 0) dup2(data->stdin, 0);
68 dup2(data->stdout, 1);
69 if(data->close_me >= 0) os_close_file(data->close_me);
72 static int slip_tramp(char **argv, int fd)
74 struct slip_pre_exec_data pe_data;
76 int status, pid, fds[2], err, output_len;
78 err = os_pipe(fds, 1, 0);
80 printk("slip_tramp : pipe failed, err = %d\n", -err);
86 pe_data.stdout = fds[1];
87 pe_data.close_me = fds[0];
88 err = run_helper(slip_pre_exec, &pe_data, argv, NULL);
93 output_len = UM_KERN_PAGE_SIZE;
94 output = um_kmalloc(output_len);
96 printk("slip_tramp : failed to allocate output buffer\n");
97 os_kill_process(pid, 1);
102 os_close_file(fds[1]);
103 read_output(fds[0], output, output_len);
104 printk("%s", output);
106 CATCH_EINTR(err = waitpid(pid, &status, 0));
109 else if(!WIFEXITED(status) || (WEXITSTATUS(status) != 0)){
110 printk("'%s' didn't exit with status 0\n", argv[0]);
115 os_close_file(fds[0]);
122 os_close_file(fds[0]);
123 os_close_file(fds[1]);
128 static int slip_open(void *data)
130 struct slip_data *pri = data;
131 char version_buf[sizeof("nnnnn\0")];
132 char gate_buf[sizeof("nnn.nnn.nnn.nnn\0")];
133 char *argv[] = { "uml_net", version_buf, "slip", "up", gate_buf,
139 printk("slip-open : Failed to open pty, err = %d\n", -err);
144 err = os_open_file(ptsname(mfd), of_rdwr(OPENFLAGS()), 0);
146 printk("Couldn't open tty for slip line, err = %d\n", -err);
157 if(pri->gate_addr != NULL){
158 sprintf(version_buf, "%d", UML_NET_VERSION);
159 strcpy(gate_buf, pri->gate_addr);
161 err = slip_tramp(argv, sfd);
164 printk("slip_tramp failed - err = %d\n", -err);
167 err = os_get_ifname(pri->slave, pri->name);
169 printk("get_ifname failed, err = %d\n", -err);
172 iter_addresses(pri->dev, open_addr, pri->name);
175 err = os_set_slip(sfd);
177 printk("Failed to set slip discipline encapsulation - "
191 static void slip_close(int fd, void *data)
193 struct slip_data *pri = data;
194 char version_buf[sizeof("nnnnn\0")];
195 char *argv[] = { "uml_net", version_buf, "slip", "down", pri->name,
199 if(pri->gate_addr != NULL)
200 iter_addresses(pri->dev, close_addr, pri->name);
202 sprintf(version_buf, "%d", UML_NET_VERSION);
204 err = slip_tramp(argv, pri->slave);
207 printk("slip_tramp failed - errno = %d\n", -err);
209 os_close_file(pri->slave);
213 int slip_user_read(int fd, void *buf, int len, struct slip_data *pri)
215 return slip_proto_read(fd, buf, len, &pri->slip);
218 int slip_user_write(int fd, void *buf, int len, struct slip_data *pri)
220 return slip_proto_write(fd, buf, len, &pri->slip);
223 static int slip_set_mtu(int mtu, void *data)
228 static void slip_add_addr(unsigned char *addr, unsigned char *netmask,
231 struct slip_data *pri = data;
233 if(pri->slave < 0) return;
234 open_addr(addr, netmask, pri->name);
237 static void slip_del_addr(unsigned char *addr, unsigned char *netmask,
240 struct slip_data *pri = data;
242 if(pri->slave < 0) return;
243 close_addr(addr, netmask, pri->name);
246 const struct net_user_info slip_user_info = {
247 .init = slip_user_init,
251 .set_mtu = slip_set_mtu,
252 .add_address = slip_add_addr,
253 .delete_address = slip_del_addr,
254 .max_packet = BUF_SIZE