1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
/* source: xio-tun.c */
/* Copyright Gerhard Rieger and contributors (see file CHANGES) */
/* Published under the GNU General Public License V.2, see file COPYING */
/* this file contains the source for opening addresses of tun/tap type */
#include "xiosysincludes.h"
#if WITH_TUN
#include "xioopen.h"
#include "xio-named.h"
#include "xio-socket.h"
#include "xio-ip.h"
#include "xio-tun.h"
static int xioopen_tun(int argc, const char *argv[], struct opt *opts, int xioflags, xiofile_t *fd, unsigned groups, int dummy1, int dummy2, int dummy3);
/****** TUN addresses ******/
const struct optdesc opt_tun_device = { "tun-device", NULL, OPT_TUN_DEVICE, GROUP_TUN, PH_OPEN, TYPE_FILENAME, OFUNC_SPEC };
const struct optdesc opt_tun_name = { "tun-name", NULL, OPT_TUN_NAME, GROUP_INTERFACE, PH_FD, TYPE_STRING, OFUNC_SPEC };
const struct optdesc opt_tun_type = { "tun-type", NULL, OPT_TUN_TYPE, GROUP_INTERFACE, PH_FD, TYPE_STRING, OFUNC_SPEC };
const struct optdesc opt_iff_no_pi = { "iff-no-pi", "no-pi", OPT_IFF_NO_PI, GROUP_TUN, PH_FD, TYPE_BOOL, OFUNC_SPEC };
/*0 const struct optdesc opt_interface_addr = { "interface-addr", "address", OPT_INTERFACE_ADDR, GROUP_INTERFACE, PH_FD, TYPE_STRING, OFUNC_SPEC };*/
/*0 const struct optdesc opt_interface_netmask = { "interface-netmask", "netmask", OPT_INTERFACE_NETMASK, GROUP_INTERFACE, PH_FD, TYPE_STRING, OFUNC_SPEC };*/
const struct optdesc opt_iff_up = { "iff-up", "up", OPT_IFF_UP, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), XIO_SIZEOF(para.tun.iff_opts), IFF_UP };
const struct optdesc opt_iff_broadcast = { "iff-broadcast", NULL, OPT_IFF_BROADCAST, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), XIO_SIZEOF(para.tun.iff_opts), IFF_BROADCAST };
const struct optdesc opt_iff_debug = { "iff-debug" , NULL, OPT_IFF_DEBUG, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), XIO_SIZEOF(para.tun.iff_opts), IFF_DEBUG };
const struct optdesc opt_iff_loopback = { "iff-loopback" , "loopback", OPT_IFF_LOOPBACK, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), XIO_SIZEOF(para.tun.iff_opts), IFF_LOOPBACK };
const struct optdesc opt_iff_pointopoint = { "iff-pointopoint", "pointopoint",OPT_IFF_POINTOPOINT, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), XIO_SIZEOF(para.tun.iff_opts), IFF_POINTOPOINT };
const struct optdesc opt_iff_notrailers = { "iff-notrailers", "notrailers", OPT_IFF_NOTRAILERS, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), XIO_SIZEOF(para.tun.iff_opts), IFF_NOTRAILERS };
const struct optdesc opt_iff_running = { "iff-running", "running", OPT_IFF_RUNNING, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), XIO_SIZEOF(para.tun.iff_opts), IFF_RUNNING };
const struct optdesc opt_iff_noarp = { "iff-noarp", "noarp", OPT_IFF_NOARP, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), XIO_SIZEOF(para.tun.iff_opts), IFF_NOARP };
const struct optdesc opt_iff_promisc = { "iff-promisc", "promisc", OPT_IFF_PROMISC, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), XIO_SIZEOF(para.tun.iff_opts), IFF_PROMISC };
const struct optdesc opt_iff_allmulti = { "iff-allmulti", "allmulti", OPT_IFF_ALLMULTI, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), XIO_SIZEOF(para.tun.iff_opts), IFF_ALLMULTI };
const struct optdesc opt_iff_master = { "iff-master", "master", OPT_IFF_MASTER, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), XIO_SIZEOF(para.tun.iff_opts), IFF_MASTER };
const struct optdesc opt_iff_slave = { "iff-slave", "slave", OPT_IFF_SLAVE, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), XIO_SIZEOF(para.tun.iff_opts), IFF_SLAVE };
const struct optdesc opt_iff_multicast = { "iff-multicast", NULL, OPT_IFF_MULTICAST, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), XIO_SIZEOF(para.tun.iff_opts), IFF_MULTICAST };
const struct optdesc opt_iff_portsel = { "iff-portsel", "portsel", OPT_IFF_PORTSEL, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), XIO_SIZEOF(para.tun.iff_opts), IFF_PORTSEL };
const struct optdesc opt_iff_automedia = { "iff-automedia", "automedia", OPT_IFF_AUTOMEDIA, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), XIO_SIZEOF(para.tun.iff_opts), IFF_AUTOMEDIA };
/*const struct optdesc opt_iff_dynamic = { "iff-dynamic", "dynamic", OPT_IFF_DYNAMIC, GROUP_INTERFACE, PH_FD, TYPE_BOOL, OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.tun.iff_opts), XIO_SIZEOF(short), IFF_DYNAMIC };*/
#if LATER
const struct optdesc opt_route = { "route", NULL, OPT_ROUTE, GROUP_INTERFACE, PH_INIT, TYPE_STRING, OFUNC_SPEC };
#endif
const struct addrdesc xioaddr_tun = { "tun", 3, xioopen_tun, GROUP_FD|GROUP_CHR|GROUP_NAMED|GROUP_OPEN|GROUP_TUN, 0, 0, 0 HELP("[:<ip-addr>/<bits>]") };
/* "if-name"=tun3
// "route"=address/netmask
// "ip6-route"=address/netmask
// "iff-broadcast"
// "iff-debug"
// "iff-promisc"
// see .../linux/if.h
*/
#if LATER
/* sub options for route option */
#define IFOPT_ROUTE 1
static const struct optdesc opt_route_tos = { "route", NULL, IFOPT_ROUTE, };
static const struct optname xio_route_options[] = {
{"tos", &xio_route_tos }
} ;
#endif
static int xioopen_tun(int argc, const char *argv[], struct opt *opts, int xioflags, xiofile_t *xfd, unsigned groups, int dummy1, int dummy2, int dummy3) {
char *tundevice = NULL;
char *tunname = NULL, *tuntype = NULL;
int pf = /*! PF_UNSPEC*/ PF_INET;
struct xiorange network;
bool no_pi = false;
const char *namedargv[] = { "tun", NULL, NULL };
int rw = (xioflags & XIO_ACCMODE);
bool exists;
struct ifreq ifr;
int sockfd;
char *ifaddr;
int result;
if (argc > 2 || argc < 0) {
Error2("%s: wrong number of parameters (%d instead of 0 or 1)",
argv[0], argc-1);
}
if (retropt_string(opts, OPT_TUN_DEVICE, &tundevice) != 0) {
tundevice = strdup("/dev/net/tun");
}
/*! socket option here? */
retropt_socket_pf(opts, &pf);
namedargv[1] = tundevice;
/* open the tun cloning device */
if ((result = _xioopen_named_early(2, namedargv, xfd, groups, &exists, opts)) < 0) {
return result;
}
/*========================= the tunnel interface =========================*/
Notice("creating tunnel network interface");
if ((result = _xioopen_open(tundevice, rw, opts)) < 0)
return result;
xfd->stream.fd = result;
/* prepare configuration of the new network interface */
memset(&ifr, 0,sizeof(ifr));
if (retropt_string(opts, OPT_TUN_NAME, &tunname) == 0) {
strncpy(ifr.ifr_name, tunname, IFNAMSIZ); /* ok */
free(tunname);
} else {
ifr.ifr_name[0] = '\0';
}
ifr.ifr_flags = IFF_TUN;
if (retropt_string(opts, OPT_TUN_TYPE, &tuntype) == 0) {
if (!strcmp(tuntype, "tap")) {
ifr.ifr_flags = IFF_TAP;
} else if (strcmp(tuntype, "tun")) {
Error1("unknown tun-type \"%s\"", tuntype);
}
}
if (retropt_bool(opts, OPT_IFF_NO_PI, &no_pi) == 0) {
if (no_pi) {
ifr.ifr_flags |= IFF_NO_PI;
#if 0 /* not neccessary for now */
} else {
ifr.ifr_flags &= ~IFF_NO_PI;
#endif
}
}
if (Ioctl(xfd->stream.fd, TUNSETIFF, &ifr) < 0) {
Error3("ioctl(%d, TUNSETIFF, {\"%s\"}: %s",
xfd->stream.fd, ifr.ifr_name, strerror(errno));
Close(xfd->stream.fd);
}
/*===================== setting interface properties =====================*/
/* we seem to need a socket for manipulating the interface */
if ((sockfd = Socket(PF_INET, SOCK_DGRAM, 0)) < 0) {
Error1("socket(PF_INET, SOCK_DGRAM, 0): %s", strerror(errno));
sockfd = xfd->stream.fd; /* desparate fallback attempt */
}
/*--------------------- setting interface address and netmask ------------*/
if (argc == 2) {
if ((ifaddr = strdup(argv[1])) == NULL) {
Error1("strdup(\"%s\"): out of memory", argv[1]);
return STAT_RETRYLATER;
}
if ((result = xioparsenetwork(ifaddr, pf, &network)) != STAT_OK) {
/*! recover */
return result;
}
socket_init(pf, (union sockaddr_union *)&ifr.ifr_addr);
((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr =
network.netaddr.ip4.sin_addr;
if (Ioctl(sockfd, SIOCSIFADDR, &ifr) < 0) {
Error4("ioctl(%d, SIOCSIFADDR, {\"%s\", \"%s\"}: %s",
sockfd, ifr.ifr_name, ifaddr, strerror(errno));
}
((struct sockaddr_in *)&ifr.ifr_netmask)->sin_addr =
network.netmask.ip4.sin_addr;
if (Ioctl(sockfd, SIOCSIFNETMASK, &ifr) < 0) {
Error4("ioctl(%d, SIOCSIFNETMASK, {\"0x%08u\", \"%s\"}, %s",
sockfd, ((struct sockaddr_in *)&ifr.ifr_netmask)->sin_addr.s_addr,
ifaddr, strerror(errno));
}
free(ifaddr);
}
/*--------------------- setting interface flags --------------------------*/
applyopts_single(&xfd->stream, opts, PH_FD);
if (Ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
Error3("ioctl(%d, SIOCGIFFLAGS, {\"%s\"}: %s",
sockfd, ifr.ifr_name, strerror(errno));
}
Debug2("\"%s\": system set flags: 0x%hx", ifr.ifr_name, ifr.ifr_flags);
ifr.ifr_flags |= xfd->stream.para.tun.iff_opts[0];
ifr.ifr_flags &= ~xfd->stream.para.tun.iff_opts[1];
Debug2("\"%s\": xio merged flags: 0x%hx", ifr.ifr_name, ifr.ifr_flags);
if (Ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) {
Error4("ioctl(%d, SIOCSIFFLAGS, {\"%s\", %hd}: %s",
sockfd, ifr.ifr_name, ifr.ifr_flags, strerror(errno));
}
ifr.ifr_flags = 0;
if (Ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
Error3("ioctl(%d, SIOCGIFFLAGS, {\"%s\"}: %s",
sockfd, ifr.ifr_name, strerror(errno));
}
Debug2("\"%s\": resulting flags: 0x%hx", ifr.ifr_name, ifr.ifr_flags);
#if LATER
applyopts_named(tundevice, opts, PH_FD);
#endif
applyopts(xfd->stream.fd, opts, PH_FD);
applyopts_cloexec(xfd->stream.fd, opts);
applyopts_fchown(xfd->stream.fd, opts);
if ((result = _xio_openlate(&xfd->stream, opts)) < 0)
return result;
return 0;
}
#endif /* WITH_TUN */
|
