Commit | Line | Data |
---|---|---|
cd1ae0e4 JD |
1 | /* |
2 | * Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) | |
3 | * Licensed under the GPL. | |
4 | */ | |
5 | ||
1da177e4 | 6 | #include <unistd.h> |
1da177e4 | 7 | #include <errno.h> |
cd1ae0e4 | 8 | #include <string.h> |
1da177e4 | 9 | #include <sys/wait.h> |
37185b33 AV |
10 | #include <net_user.h> |
11 | #include <os.h> | |
cd1ae0e4 | 12 | #include "slirp.h" |
1da177e4 | 13 | |
f34d9d2d | 14 | static int slirp_user_init(void *data, void *dev) |
1da177e4 LT |
15 | { |
16 | struct slirp_data *pri = data; | |
17 | ||
18 | pri->dev = dev; | |
f34d9d2d | 19 | return 0; |
1da177e4 LT |
20 | } |
21 | ||
22 | struct slirp_pre_exec_data { | |
f9bb3b59 HWH |
23 | int stdin_fd; |
24 | int stdout_fd; | |
1da177e4 LT |
25 | }; |
26 | ||
27 | static void slirp_pre_exec(void *arg) | |
28 | { | |
29 | struct slirp_pre_exec_data *data = arg; | |
30 | ||
f9bb3b59 HWH |
31 | if (data->stdin_fd != -1) |
32 | dup2(data->stdin_fd, 0); | |
33 | if (data->stdout_fd != -1) | |
34 | dup2(data->stdout_fd, 1); | |
1da177e4 LT |
35 | } |
36 | ||
37 | static int slirp_tramp(char **argv, int fd) | |
38 | { | |
39 | struct slirp_pre_exec_data pe_data; | |
40 | int pid; | |
41 | ||
f9bb3b59 HWH |
42 | pe_data.stdin_fd = fd; |
43 | pe_data.stdout_fd = fd; | |
c4399016 | 44 | pid = run_helper(slirp_pre_exec, &pe_data, argv); |
1da177e4 | 45 | |
cd1ae0e4 | 46 | return pid; |
1da177e4 LT |
47 | } |
48 | ||
1da177e4 LT |
49 | static int slirp_open(void *data) |
50 | { | |
51 | struct slirp_data *pri = data; | |
a3c77c67 | 52 | int fds[2], pid, err; |
1da177e4 | 53 | |
a3c77c67 | 54 | err = os_pipe(fds, 1, 1); |
cd1ae0e4 JD |
55 | if (err) |
56 | return err; | |
1da177e4 | 57 | |
a3c77c67 | 58 | err = slirp_tramp(pri->argw.argv, fds[1]); |
cd1ae0e4 JD |
59 | if (err < 0) { |
60 | printk(UM_KERN_ERR "slirp_tramp failed - errno = %d\n", -err); | |
a3c77c67 | 61 | goto out; |
1da177e4 | 62 | } |
a3c77c67 JD |
63 | pid = err; |
64 | ||
65 | pri->slave = fds[1]; | |
66 | pri->slip.pos = 0; | |
67 | pri->slip.esc = 0; | |
68 | pri->pid = err; | |
69 | ||
cd1ae0e4 | 70 | return fds[0]; |
a3c77c67 | 71 | out: |
cd1ae0e4 JD |
72 | close(fds[0]); |
73 | close(fds[1]); | |
a3c77c67 | 74 | return err; |
1da177e4 LT |
75 | } |
76 | ||
77 | static void slirp_close(int fd, void *data) | |
78 | { | |
79 | struct slirp_data *pri = data; | |
4dbed85a | 80 | int err; |
1da177e4 | 81 | |
cd1ae0e4 JD |
82 | close(fd); |
83 | close(pri->slave); | |
1da177e4 LT |
84 | |
85 | pri->slave = -1; | |
86 | ||
cd1ae0e4 JD |
87 | if (pri->pid<1) { |
88 | printk(UM_KERN_ERR "slirp_close: no child process to shut " | |
89 | "down\n"); | |
1da177e4 LT |
90 | return; |
91 | } | |
92 | ||
93 | #if 0 | |
cd1ae0e4 JD |
94 | if (kill(pri->pid, SIGHUP)<0) { |
95 | printk(UM_KERN_ERR "slirp_close: sending hangup to %d failed " | |
96 | "(%d)\n", pri->pid, errno); | |
1da177e4 LT |
97 | } |
98 | #endif | |
1aa351a3 | 99 | err = helper_wait(pri->pid); |
4dbed85a | 100 | if (err < 0) |
1da177e4 | 101 | return; |
1da177e4 LT |
102 | |
103 | pri->pid = -1; | |
104 | } | |
105 | ||
106 | int slirp_user_read(int fd, void *buf, int len, struct slirp_data *pri) | |
107 | { | |
a3c77c67 | 108 | return slip_proto_read(fd, buf, len, &pri->slip); |
1da177e4 LT |
109 | } |
110 | ||
111 | int slirp_user_write(int fd, void *buf, int len, struct slirp_data *pri) | |
112 | { | |
a3c77c67 | 113 | return slip_proto_write(fd, buf, len, &pri->slip); |
1da177e4 LT |
114 | } |
115 | ||
5e7672ec | 116 | const struct net_user_info slirp_user_info = { |
1da177e4 LT |
117 | .init = slirp_user_init, |
118 | .open = slirp_open, | |
119 | .close = slirp_close, | |
120 | .remove = NULL, | |
1da177e4 LT |
121 | .add_address = NULL, |
122 | .delete_address = NULL, | |
b53f35a8 JD |
123 | .mtu = BUF_SIZE, |
124 | .max_packet = BUF_SIZE, | |
1da177e4 | 125 | }; |