File: xio-rawip.c

package info (click to toggle)
socat 2.0.0~beta9-1
  • links: PTS
  • area: main
  • in suites: experimental
  • size: 3,740 kB
  • sloc: ansic: 30,875; sh: 11,630; makefile: 149
file content (332 lines) | stat: -rw-r--r-- 13,602 bytes parent folder | download
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
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
/* source: xio-rawip.c */
/* Copyright Gerhard Rieger 2001-2009 */
/* Published under the GNU General Public License V.2, see file COPYING */

/* this file contains the source for opening addresses of raw IP type */

#include "xiosysincludes.h"

#if (WITH_IP4 || WITH_IP6) && WITH_RAWIP

#include "xioopen.h"
#include "xio-socket.h"
#include "xio-ip.h"
#include "xio-ip6.h"
#include "xio-tcpwrap.h"

#include "xio-rawip.h"


static
int xioopen_rawip_sendto(int argc, const char *argv[], struct opt *opts,
			 int xioflags, xiofile_t *fd, unsigned groups, int pf,
			 int dummy2, int dummy3);
static
int xioopen_rawip_datagram(int argc, const char *argv[], struct opt *opts,
			 int xioflags, xiofile_t *fd, unsigned groups, int pf,
			 int dummy2, int dummy3);
static
int xioopen_rawip_recvfrom(int argc, const char *argv[], struct opt *opts,
			 int xioflags, xiofile_t *xfd, unsigned groups,
			 int pf, int socktype, int dummy3);
static
int xioopen_rawip_recv(int argc, const char *argv[], struct opt *opts,
		       int xioflags, xiofile_t *xfd, unsigned groups,
		       int pf, int socktype, int ipproto);
static
int _xioopen_rawip_sendto(const char *hostname, const char *protname,
			  struct opt *opts, int xioflags,
			  xiofile_t *xxfd, unsigned groups, int *pf);

static const struct xioaddr_endpoint_desc xioaddr_rawip_sendto2  = { XIOADDR_SYS, "ip-sendto",     2, XIOBIT_WRONLY|XIOBIT_RDWR, GROUP_FD|GROUP_SOCKET|GROUP_SOCK_IP4|GROUP_SOCK_IP6, XIOSHUT_DOWN, XIOCLOSE_NONE, xioopen_rawip_sendto,   PF_UNSPEC, 0, 0 HELP(":<host>:<protocol>") };
const union xioaddr_desc *xioaddrs_rawip_sendto[]    = { (union xioaddr_desc *)&xioaddr_rawip_sendto2, NULL };
static const struct xioaddr_endpoint_desc xioaddr_rawip_datagram2= { XIOADDR_SYS, "ip-datagram",   2, XIOBIT_ALL,                GROUP_FD|GROUP_SOCKET|GROUP_SOCK_IP4|GROUP_SOCK_IP6|GROUP_RANGE, XIOSHUT_DOWN, XIOCLOSE_NONE, xioopen_rawip_datagram, PF_UNSPEC, 0, 0 HELP(":<host>:<protocol>") };
const union xioaddr_desc *xioaddrs_rawip_datagram[]  = { (union xioaddr_desc *)&xioaddr_rawip_datagram2, NULL };
static const struct xioaddr_endpoint_desc xioaddr_rawip_recvfrom1= { XIOADDR_SYS, "ip-recvfrom",   1, XIOBIT_RDONLY|XIOBIT_RDWR, GROUP_FD|GROUP_SOCKET|GROUP_SOCK_IP4|GROUP_SOCK_IP6|GROUP_CHILD|GROUP_RANGE, XIOSHUT_DOWN, XIOCLOSE_NONE, xioopen_rawip_recvfrom, PF_UNSPEC, SOCK_RAW, 0 HELP(":<protocol>") };
const union xioaddr_desc *xioaddrs_rawip_recvfrom[]  = { (union xioaddr_desc *)&xioaddr_rawip_recvfrom1, NULL };
static const struct xioaddr_endpoint_desc xioaddr_rawip_recv1    = { XIOADDR_SYS, "ip-recv",       1, XIOBIT_RDONLY,             GROUP_FD|GROUP_SOCKET|GROUP_SOCK_IP4|GROUP_SOCK_IP6|GROUP_RANGE,             XIOSHUT_DOWN, XIOCLOSE_NONE, xioopen_rawip_recv,     PF_UNSPEC, SOCK_RAW, 0 HELP(":<protocol>") };
const union xioaddr_desc *xioaddrs_rawip_recv[]      = { (union xioaddr_desc *)&xioaddr_rawip_recv1, NULL };

#if WITH_IP4
static const struct xioaddr_endpoint_desc xioaddr_rawip4_sendto2  = { XIOADDR_SYS, "ip4-sendto",   2, XIOBIT_WRONLY|XIOBIT_RDWR, GROUP_FD|GROUP_SOCKET|GROUP_SOCK_IP4, XIOSHUT_DOWN, XIOCLOSE_NONE, xioopen_rawip_sendto,   PF_INET, 0, 0 HELP(":<host>:<protocol>") };
const union xioaddr_desc *xioaddrs_rawip4_sendto[]   = { (union xioaddr_desc *)&xioaddr_rawip4_sendto2, NULL };
static const struct xioaddr_endpoint_desc xioaddr_rawip4_datagram2= { XIOADDR_SYS, "ip4-datagram", 2, XIOBIT_ALL,                GROUP_FD|GROUP_SOCKET|GROUP_SOCK_IP4|GROUP_RANGE, XIOSHUT_DOWN, XIOCLOSE_NONE, xioopen_rawip_datagram, PF_INET, 0, 0 HELP(":<host>:<protocol>") };
const union xioaddr_desc *xioaddrs_rawip4_datagram[] = { (union xioaddr_desc *)&xioaddr_rawip4_datagram2, NULL };
static const struct xioaddr_endpoint_desc xioaddr_rawip4_recvfrom1= { XIOADDR_SYS, "ip4-recvfrom", 1, XIOBIT_RDONLY|XIOBIT_RDWR, GROUP_FD|GROUP_SOCKET|GROUP_SOCK_IP4|GROUP_CHILD|GROUP_RANGE, XIOSHUT_DOWN, XIOCLOSE_NONE, xioopen_rawip_recvfrom, PF_INET,  SOCK_RAW, 0 HELP(":<protocol>") };
const union xioaddr_desc *xioaddrs_rawip4_recvfrom[] = { (union xioaddr_desc *)&xioaddr_rawip4_recvfrom1, NULL };
static const struct xioaddr_endpoint_desc xioaddr_rawip4_recv1    = { XIOADDR_SYS, "ip4-recv",     1, XIOBIT_RDONLY,             GROUP_FD|GROUP_SOCKET|GROUP_SOCK_IP4|GROUP_RANGE,             XIOSHUT_DOWN, XIOCLOSE_NONE, xioopen_rawip_recv,     PF_INET,  SOCK_RAW, 0 HELP(":<protocol>") };
const union xioaddr_desc *xioaddrs_rawip4_recv[]     = { (union xioaddr_desc *)&xioaddr_rawip4_recv1, NULL };
#endif /* IWITH_IP4 */

#if WITH_IP6
static const struct xioaddr_endpoint_desc xioaddr_rawip6_sendto2  = { XIOADDR_SYS, "ip6-sendto",   2, XIOBIT_WRONLY|XIOBIT_RDWR, GROUP_FD|GROUP_SOCKET|GROUP_SOCK_IP6, XIOSHUT_DOWN, XIOCLOSE_NONE, xioopen_rawip_sendto,   PF_INET6, 0, 0 HELP(":<host>:<protocol>") };
const union xioaddr_desc *xioaddrs_rawip6_sendto[]   = { (union xioaddr_desc *)&xioaddr_rawip6_sendto2, NULL };
static const struct xioaddr_endpoint_desc xioaddr_rawip6_datagram2= { XIOADDR_SYS, "ip6-datagram", 2, XIOBIT_ALL,                GROUP_FD|GROUP_SOCKET|GROUP_SOCK_IP6|GROUP_RANGE, XIOSHUT_DOWN, XIOCLOSE_NONE, xioopen_rawip_datagram, PF_INET6, 0, 0 HELP(":<host>:<protocol>") };
const union xioaddr_desc *xioaddrs_rawip6_datagram[] = { (union xioaddr_desc *)&xioaddr_rawip6_datagram2, NULL };
static const struct xioaddr_endpoint_desc xioaddr_rawip6_recvfrom1= { XIOADDR_SYS, "ip6-recvfrom", 1, XIOBIT_RDONLY|XIOBIT_RDWR, GROUP_FD|GROUP_SOCKET|GROUP_SOCK_IP6|GROUP_CHILD|GROUP_RANGE, XIOSHUT_DOWN, XIOCLOSE_NONE, xioopen_rawip_recvfrom, PF_INET6, SOCK_RAW, 0 HELP(":<protocol>") };
const union xioaddr_desc *xioaddrs_rawip6_recvfrom[] = { (union xioaddr_desc *)&xioaddr_rawip6_recvfrom1, NULL };
static const struct xioaddr_endpoint_desc xioaddr_rawip6_recv1    = { XIOADDR_SYS, "ip6-recv",     1, XIOBIT_RDONLY,                GROUP_FD|GROUP_SOCKET|GROUP_SOCK_IP6|GROUP_RANGE,             XIOSHUT_DOWN, XIOCLOSE_NONE, xioopen_rawip_recv,     PF_INET6, SOCK_RAW, 0 HELP(":<protocol>") };
const union xioaddr_desc *xioaddrs_rawip6_recv[]     = { (union xioaddr_desc *)&xioaddr_rawip6_recv1, NULL };
#endif /* WITH_IP6 */

/* we expect the form: host:protocol */
/* struct sockaddr_in sa;*/
/* socklen_t salen;*/
static
int xioopen_rawip_sendto(int argc, const char *argv[], struct opt *opts,
			 int xioflags, xiofile_t *xxfd, unsigned groups,
			 int pf, int dummy2, int dummy3) {
   int result;

   if (argc != 3) {
      Error2("%s: wrong number of parameters (%d instead of 2)",
	     argv[0], argc-1);
      return STAT_NORETRY;
   }
   if ((result = _xioopen_rawip_sendto(argv[1], argv[2], opts, xioflags, xxfd,
				       groups, &pf)) != STAT_OK) {
      return result;
   }
   _xio_openlate(&xxfd->stream, opts);
   return STAT_OK;
}

/*
   applies and consumes the following options: 
   PH_PASTSOCKET, PH_FD, PH_PREBIND, PH_BIND, PH_PASTBIND, PH_CONNECTED, PH_LATE
   OFUNC_OFFSET
   OPT_PROTOCOL_FAMILY, OPT_BIND, OPT_SO_TYPE, OPT_SO_PROTOTYPE, OPT_USER,
   OPT_GROUP, OPT_CLOEXEC
 */
static
int _xioopen_rawip_sendto(const char *hostname, const char *protname,
			  struct opt *opts, int xioflags, xiofile_t *xxfd,
			  unsigned groups, int *pf) {
   char *garbage;
   xiosingle_t *xfd = &xxfd->stream;
   int rw = (xioflags&XIO_ACCMODE);
   union sockaddr_union us;
   socklen_t uslen;
   int feats = 1;	/* option bind supports only address, not port */
   int socktype = SOCK_RAW;
   int ipproto;
   bool needbind = false;
   int result;

   if ((ipproto = strtoul(protname, &garbage, 0)) >= 256) {
      Error3("xioopen_rawip_sendto(\"%s:%s\",,): protocol number exceeds 255 (%u)",
	     hostname, protname, ipproto);
      return STAT_NORETRY;
   } else if (*garbage) {
      Warn2("xioopen_rawip_sendto(\"%s:%s\",,): trailing garbage in protocol specification",
	     hostname, protname);
      /*return STAT_NORETRY;*/
   }

   retropt_int(opts, OPT_PROTOCOL_FAMILY, pf);

   /* ...res_opts[] */
   if (applyopts_single(xfd, opts, PH_INIT) < 0)  return -1;
   applyopts(-1, opts, PH_INIT);

   xfd->salen = sizeof(xfd->peersa);
   if ((result =
	xiogetaddrinfo(hostname, NULL, *pf, socktype, ipproto,
		       &xfd->peersa, &xfd->salen,
		       xfd->para.socket.ip.res_opts[0],
		       xfd->para.socket.ip.res_opts[1]))
       != STAT_OK) {
      return result;
   }
   if (*pf == PF_UNSPEC) {
      *pf = xfd->peersa.soa.sa_family;
   }

   uslen = socket_init(*pf, &us);

   xfd->dtype = XIODATA_RECVFROM_SKIPIP;

   if (retropt_bind(opts, *pf, socktype, ipproto, &us.soa, &uslen, feats,
		    xfd->para.socket.ip.res_opts[0],
		    xfd->para.socket.ip.res_opts[1]) != STAT_NOACTION) {
      needbind = true;
   }
   if ((result =
	_xioopen_dgram_sendto(needbind?&us:NULL, uslen,
			      opts, xioflags, xfd, groups, *pf, socktype,
			      ipproto)) != STAT_OK) {
      return result;
   }
   if (XIOWITHWR(rw))   xfd->wfd = xfd->rfd;
   if (!XIOWITHRD(rw))  xfd->rfd = -1;
   return STAT_OK;
}


/* we expect the form: address:protocol */
static
int xioopen_rawip_datagram(int argc, const char *argv[], struct opt *opts,
			 int xioflags, xiofile_t *xxfd, unsigned groups,
			 int pf, int dummy2, int dummy3) {
   xiosingle_t *xfd = &xxfd->stream;
   char *rangename;
   int result;

   if (argc != 3) {
      Error2("%s: wrong number of parameters (%d instead of 2)",
	     argv[0], argc-1);
      return STAT_NORETRY;
   }
   if ((result =
	_xioopen_rawip_sendto(argv[1], argv[2], opts, xioflags, xxfd,
				groups, &pf)) != STAT_OK) {
      return result;
   }

   xfd->dtype = XIOREAD_RECV|XIOWRITE_SENDTO;
   if (pf == PF_INET) {
      xfd->dtype |= XIOREAD_RECV_SKIPIP;
   }

   xfd->para.socket.la.soa.sa_family = xfd->peersa.soa.sa_family;

   /* which reply packets will be accepted - determine by range option */
   if (retropt_string(opts, OPT_RANGE, &rangename) >= 0) {
      if (xioparserange(rangename, pf, &xfd->para.socket.range) < 0) {
	 free(rangename);
	 return STAT_NORETRY;
      }
      xfd->para.socket.dorange = true;
      xfd->dtype |= XIOREAD_RECV_CHECKRANGE;
      free(rangename);
   }

#if WITH_LIBWRAP
   xio_retropt_tcpwrap(xfd, opts);
#endif /* WITH_LIBWRAP */

   _xio_openlate(xfd, opts);
   return STAT_OK;
}


static
int xioopen_rawip_recvfrom(int argc, const char *argv[], struct opt *opts,
		     int xioflags, xiofile_t *xfd, unsigned groups,
		     int pf, int socktype, int dummy3) {
   const char *protname = argv[1];
   char *garbage;
   union sockaddr_union us;
   socklen_t uslen = sizeof(us);
   int ipproto;
   bool needbind = false;
   int result;

   if (argc != 2) {
      Error2("%s: wrong number of parameters (%d instead of 1)",
	     argv[0], argc-1);
      return STAT_NORETRY;
   }

   if ((ipproto = strtoul(protname, &garbage, 0)) >= 256) {
      Error2("xioopen_rawip_recvfrom(\"%s\",,): protocol number exceeds 255 (%u)",
	     protname, ipproto);
      return STAT_NORETRY;
   } else if (*garbage) {
      Warn1("xioopen_rawip_recvfrom(\"%s\",,): trailing garbage in protocol specification",
	     protname);
      /*return STAT_NORETRY;*/
   }
   xfd->stream.howtoshut  = XIOSHUT_NONE;
   xfd->stream.howtoclose = XIOCLOSE_CLOSE;

   retropt_socket_pf(opts, &pf);
   if (pf == PF_UNSPEC) {
#if WITH_IP4 && WITH_IP6
      pf = xioopts.default_ip=='6'?PF_INET6:PF_INET;
#elif WITH_IP6
      pf = PF_INET6;
#else
      pf = PF_INET;
#endif
   }

   if (retropt_bind(opts, pf, socktype, ipproto, &us.soa, &uslen, 1,
		    xfd->stream.para.socket.ip.res_opts[0],
		    xfd->stream.para.socket.ip.res_opts[1]) != STAT_NOACTION) {
      needbind = true;
   }

   xfd->stream.dtype = XIODATA_RECVFROM_SKIPIP_ONE;
   if ((result =
	_xioopen_dgram_recvfrom(&xfd->stream, xioflags, needbind?&us.soa:NULL,
				uslen, opts, pf, socktype, ipproto, E_ERROR))
       != STAT_OK) {
      return result;
   }
   _xio_openlate(&xfd->stream, opts);
   return STAT_OK;
}


static
int xioopen_rawip_recv(int argc, const char *argv[], struct opt *opts,
		       int xioflags, xiofile_t *xfd, unsigned groups,
		       int pf, int socktype, int dummy3) {
   const char *protname = argv[1];
   char *garbage;
   bool needbind = false;
   union sockaddr_union us;
   socklen_t uslen = sizeof(us);
   int ipproto;
   int result;

   if (argc != 2) {
      Error2("%s: wrong number of parameters (%d instead of 1)",
	     argv[0], argc-1);
      return STAT_NORETRY;
   }

   if ((ipproto = strtoul(protname, &garbage, 0)) >= 256) {
      Error2("xioopen_rawip_recv(\"%s\",,): protocol number exceeds 255 (%u)",
	     protname, ipproto);
      return STAT_NORETRY;
   } else if (*garbage) {
      Warn1("xioopen_rawip_recv(\"%s\",,): trailing garbage in protocol specification",
	     protname);
      /*return STAT_NORETRY;*/
   }

   retropt_socket_pf(opts, &pf);
   if (pf == PF_UNSPEC) {
#if WITH_IP4 && WITH_IP6
      pf = xioopts.default_ip=='6'?PF_INET6:PF_INET;
#elif WITH_IP6
      pf = PF_INET6;
#else
      pf = PF_INET;
#endif
   }

   if (retropt_bind(opts, pf, socktype, ipproto,
		    &/*us.soa*/xfd->stream.para.socket.la.soa, &uslen, 1,
		    xfd->stream.para.socket.ip.res_opts[0],
		    xfd->stream.para.socket.ip.res_opts[1]) ==
       STAT_OK) {
      needbind = true;
   } else {
      /* pf is required during xioread checks */
      xfd->stream.para.socket.la.soa.sa_family = pf;
   }

   xfd->stream.dtype = XIODATA_RECV_SKIPIP;
   result =
      _xioopen_dgram_recv(&xfd->stream, xioflags,
			  needbind?&/*us.soa*/xfd->stream.para.socket.la.soa:NULL,
			  uslen,
			  opts, pf, socktype, ipproto, E_ERROR);
   _xio_openlate(&xfd->stream, opts);
   return result;
}

#endif /* (WITH_IP4 || WITH_IP6) && WITH_RAWIP */