8 #include <sys/termios.h>
10 #include <sys/signal.h>
11 #include "user_util.h"
12 #include "kern_util.h"
16 #include "slip_proto.h"
20 void slip_user_init(void *data, void *dev)
22 struct slip_data *pri = data;
27 static int set_up_tty(int fd)
32 if (tcgetattr(fd, &tios) < 0) {
33 printk("could not get initial terminal attributes\n");
37 tios.c_cflag = CS8 | CREAD | HUPCL | CLOCAL;
38 tios.c_iflag = IGNBRK | IGNPAR;
41 for (i = 0; i < NCCS; i++)
46 cfsetospeed(&tios, B38400);
47 cfsetispeed(&tios, B38400);
49 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
50 printk("failed to set terminal attributes\n");
56 struct slip_pre_exec_data {
62 static void slip_pre_exec(void *arg)
64 struct slip_pre_exec_data *data = arg;
66 if(data->stdin >= 0) dup2(data->stdin, 0);
67 dup2(data->stdout, 1);
68 if(data->close_me >= 0) os_close_file(data->close_me);
71 static int slip_tramp(char **argv, int fd)
73 struct slip_pre_exec_data pe_data;
75 int status, pid, fds[2], err, output_len;
77 err = os_pipe(fds, 1, 0);
79 printk("slip_tramp : pipe failed, err = %d\n", -err);
85 pe_data.stdout = fds[1];
86 pe_data.close_me = fds[0];
87 pid = run_helper(slip_pre_exec, &pe_data, argv, NULL);
89 if(pid < 0) err = pid;
91 output_len = page_size();
92 output = um_kmalloc(output_len);
94 printk("slip_tramp : failed to allocate output "
97 os_close_file(fds[1]);
98 read_output(fds[0], output, output_len);
100 printk("%s", output);
103 if(waitpid(pid, &status, 0) < 0) err = errno;
104 else if(!WIFEXITED(status) || (WEXITSTATUS(status) != 0)){
105 printk("'%s' didn't exit with status 0\n", argv[0]);
112 static int slip_open(void *data)
114 struct slip_data *pri = data;
115 char version_buf[sizeof("nnnnn\0")];
116 char gate_buf[sizeof("nnn.nnn.nnn.nnn\0")];
117 char *argv[] = { "uml_net", version_buf, "slip", "up", gate_buf,
123 printk("umn : Failed to open pty, err = %d\n", -mfd);
126 sfd = os_open_file(ptsname(mfd), of_rdwr(OPENFLAGS()), 0);
128 printk("Couldn't open tty for slip line, err = %d\n", -sfd);
131 if(set_up_tty(sfd)) return(-1);
135 if(pri->gate_addr != NULL){
136 sprintf(version_buf, "%d", UML_NET_VERSION);
137 strcpy(gate_buf, pri->gate_addr);
139 err = slip_tramp(argv, sfd);
142 printk("slip_tramp failed - err = %d\n", -err);
145 err = os_get_ifname(pri->slave, pri->name);
147 printk("get_ifname failed, err = %d\n", -err);
150 iter_addresses(pri->dev, open_addr, pri->name);
153 err = os_set_slip(sfd);
155 printk("Failed to set slip discipline encapsulation - "
163 static void slip_close(int fd, void *data)
165 struct slip_data *pri = data;
166 char version_buf[sizeof("nnnnn\0")];
167 char *argv[] = { "uml_net", version_buf, "slip", "down", pri->name,
171 if(pri->gate_addr != NULL)
172 iter_addresses(pri->dev, close_addr, pri->name);
174 sprintf(version_buf, "%d", UML_NET_VERSION);
176 err = slip_tramp(argv, -1);
179 printk("slip_tramp failed - errno = %d\n", -err);
181 os_close_file(pri->slave);
185 int slip_user_read(int fd, void *buf, int len, struct slip_data *pri)
187 int i, n, size, start;
191 while(i < pri->more) {
192 size = slip_unesc(pri->ibuf[i++],
193 pri->ibuf, &pri->pos, &pri->esc);
195 memcpy(buf, pri->ibuf, size);
196 memmove(pri->ibuf, &pri->ibuf[i], pri->more-i);
197 pri->more=pri->more-i;
204 n = net_read(fd, &pri->ibuf[pri->pos], sizeof(pri->ibuf) - pri->pos);
205 if(n <= 0) return(n);
208 for(i = 0; i < n; i++){
209 size = slip_unesc(pri->ibuf[start + i],
210 pri->ibuf, &pri->pos, &pri->esc);
212 memcpy(buf, pri->ibuf, size);
213 memmove(pri->ibuf, &pri->ibuf[start+i+1], n-(i+1));
221 int slip_user_write(int fd, void *buf, int len, struct slip_data *pri)
225 actual = slip_esc(buf, pri->obuf, len);
226 n = net_write(fd, pri->obuf, actual);
231 static int slip_set_mtu(int mtu, void *data)
236 static void slip_add_addr(unsigned char *addr, unsigned char *netmask,
239 struct slip_data *pri = data;
241 if(pri->slave < 0) return;
242 open_addr(addr, netmask, pri->name);
245 static void slip_del_addr(unsigned char *addr, unsigned char *netmask,
248 struct slip_data *pri = data;
250 if(pri->slave < 0) return;
251 close_addr(addr, netmask, pri->name);
254 struct net_user_info slip_user_info = {
255 .init = slip_user_init,
259 .set_mtu = slip_set_mtu,
260 .add_address = slip_add_addr,
261 .delete_address = slip_del_addr,
262 .max_packet = BUF_SIZE
266 * Overrides for Emacs so that we follow Linus's tabbing style.
267 * Emacs will notice this stuff at the end of the file and automatically
268 * adjust the settings for this buffer only. This must remain at the end
270 * ---------------------------------------------------------------------------
272 * c-file-style: "linux"