45 |
* Allocate TUN device |
* Allocate TUN device |
46 |
*/ |
*/ |
47 |
int |
int |
48 |
tun_open() |
tun_open () |
49 |
{ |
{ |
50 |
char tunname[14]; |
char tunname[14]; |
51 |
int i; |
int i; |
52 |
|
|
53 |
if (PARAM_INTERFACE_NAME) { |
if (PARAM_INTERFACE_NAME) |
54 |
sprintf(tunname, "/dev/%s", PARAM_INTERFACE_NAME); |
{ |
55 |
tun_fd = open(tunname, O_RDWR | O_NONBLOCK); |
sprintf (tunname, "/dev/%s", PARAM_INTERFACE_NAME); |
56 |
} else { |
tun_fd = open (tunname, O_RDWR | O_NONBLOCK); |
57 |
for (i = 0; i < 255; i++) { |
} |
58 |
sprintf(tunname, "/dev/tun%d", i); |
else |
59 |
/* Open device */ |
{ |
60 |
if ((tun_fd = open(tunname, O_RDWR| O_NONBLOCK)) > 0) { |
for (i = 0; i < 255; i++) |
61 |
sprintf(PARAM_INTERFACE_NAME, "tun%d", i); |
{ |
62 |
break; |
sprintf (tunname, "/dev/tun%d", i); |
63 |
} |
/* Open device */ |
64 |
|
if ((tun_fd = open (tunname, O_RDWR | O_NONBLOCK)) > 0) |
65 |
|
{ |
66 |
|
sprintf (PARAM_INTERFACE_NAME, "tun%d", i); |
67 |
|
break; |
68 |
|
} |
69 |
|
} |
70 |
|
} |
71 |
|
if (fd > -1) |
72 |
|
{ |
73 |
|
i = 0; |
74 |
|
/* Disable extended modes */ |
75 |
|
ioctl (tun_fd, TUNSLMODE, &i); |
76 |
|
ioctl (tun_fd, TUNSIFHEAD, &i); |
77 |
} |
} |
78 |
} |
return tun_ready (); |
|
if (fd > -1) { |
|
|
i = 0; |
|
|
/* Disable extended modes */ |
|
|
ioctl(tun_fd, TUNSLMODE, &i); |
|
|
ioctl(tun_fd, TUNSIFHEAD, &i); |
|
|
} |
|
|
return tun_ready(); |
|
79 |
} |
} |
80 |
|
|
81 |
int |
int |
82 |
tun_close() |
tun_close () |
83 |
{ |
{ |
84 |
close(tun_fd); |
close (tun_fd); |
85 |
tun_fd = -1; |
tun_fd = -1; |
86 |
return 1; |
return 1; |
87 |
} |
} |
93 |
} |
} |
94 |
|
|
95 |
int |
int |
96 |
tun_get(buffer, data, data_size) |
tun_get (buffer, data, data_size) |
97 |
buffer_t *buffer; |
buffer_t *buffer; |
98 |
char **data; |
char **data; |
99 |
size_t *data_size; |
size_t *data_size; |
100 |
{ |
{ |
101 |
struct ip *ip; |
struct ip *ip; |
102 |
|
|
103 |
ip=buffer_start(buffer); |
ip = buffer_start (buffer); |
104 |
*data=NULL; |
*data = NULL; |
105 |
*data_size=0; |
*data_size = 0; |
106 |
if(buffer->used < sizeof(struct ip)) |
if (buffer->used < sizeof (struct ip)) |
107 |
return 0; |
return 0; |
108 |
if(buffer->used < ip->ip_len) |
if (buffer->used < ip->ip_len) |
109 |
return 0; |
return 0; |
110 |
|
|
111 |
*data=ip; |
*data = ip; |
112 |
*data_size=ip->ip_len; |
*data_size = ip->ip_len; |
113 |
buffer_free(buffer,ip->ip_len); |
buffer_free (buffer, ip->ip_len); |
114 |
return 1; |
return 1; |
115 |
} |
} |
116 |
|
|
117 |
int |
int |
118 |
tun_put(buffer, data, data_size) |
tun_put (buffer, data, data_size) |
119 |
buffer_t *buffer; |
buffer_t *buffer; |
120 |
char *data; |
char *data; |
121 |
size_t data_size; |
size_t data_size; |
122 |
{ |
{ |
123 |
char *p; |
char *p; |
124 |
|
|
125 |
p=buffer_end(buffer); |
p = buffer_end (buffer); |
126 |
buffer_alloc(buffer,data_size); |
buffer_alloc (buffer, data_size); |
127 |
memcpy(p,data,data_size); |
memcpy (p, data, data_size); |
128 |
return 1; |
return 1; |
129 |
} |
} |