1 /*
2 * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
3 * Copyright (c) 1996-2017 The strace developers.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include "defs.h"
30
31 #include <sys/socket.h>
32 #if defined ALPHA || defined SH || defined SH64
33 # include <linux/ioctl.h>
34 #endif
35 #include <linux/sockios.h>
36 #include <arpa/inet.h>
37 #include <net/if.h>
38
39 #include DEF_MPERS_TYPE(struct_ifconf)
40 #include DEF_MPERS_TYPE(struct_ifreq)
41
42 typedef struct ifconf struct_ifconf;
43 typedef struct ifreq struct_ifreq;
44
45 #include MPERS_DEFS
46
47 #include "xlat/iffflags.h"
48
49 #define PRINT_IFREQ_ADDR(tcp, ifr, sockaddr) \
50 do { \
51 tprints(#sockaddr "="); \
52 print_sockaddr(tcp, &((ifr)->sockaddr), \
53 sizeof((ifr)->sockaddr)); \
54 } while (0)
55
56 static void
print_ifname(const char * ifname)57 print_ifname(const char *ifname)
58 {
59 print_quoted_string(ifname, IFNAMSIZ + 1, QUOTE_0_TERMINATED);
60 }
61
62 static void
print_ifreq(struct tcb * const tcp,const unsigned int code,const kernel_ulong_t arg,const struct_ifreq * const ifr)63 print_ifreq(struct tcb *const tcp, const unsigned int code,
64 const kernel_ulong_t arg, const struct_ifreq *const ifr)
65 {
66 switch (code) {
67 case SIOCSIFADDR:
68 case SIOCGIFADDR:
69 PRINT_IFREQ_ADDR(tcp, ifr, ifr_addr);
70 break;
71 case SIOCSIFDSTADDR:
72 case SIOCGIFDSTADDR:
73 PRINT_IFREQ_ADDR(tcp, ifr, ifr_dstaddr);
74 break;
75 case SIOCSIFBRDADDR:
76 case SIOCGIFBRDADDR:
77 PRINT_IFREQ_ADDR(tcp, ifr, ifr_broadaddr);
78 break;
79 case SIOCSIFNETMASK:
80 case SIOCGIFNETMASK:
81 PRINT_IFREQ_ADDR(tcp, ifr, ifr_netmask);
82 break;
83 case SIOCSIFHWADDR:
84 case SIOCGIFHWADDR: {
85 /* XXX Are there other hardware addresses
86 than 6-byte MACs? */
87 const unsigned char *bytes =
88 (unsigned char *) &ifr->ifr_hwaddr.sa_data;
89 tprintf("ifr_hwaddr=%02x:%02x:%02x:%02x:%02x:%02x",
90 bytes[0], bytes[1], bytes[2],
91 bytes[3], bytes[4], bytes[5]);
92 break;
93 }
94 case SIOCSIFFLAGS:
95 case SIOCGIFFLAGS:
96 tprints("ifr_flags=");
97 printflags(iffflags, (unsigned short) ifr->ifr_flags, "IFF_???");
98 break;
99 case SIOCSIFMETRIC:
100 case SIOCGIFMETRIC:
101 tprintf("ifr_metric=%d", ifr->ifr_metric);
102 break;
103 case SIOCSIFMTU:
104 case SIOCGIFMTU:
105 tprintf("ifr_mtu=%d", ifr->ifr_mtu);
106 break;
107 case SIOCSIFSLAVE:
108 case SIOCGIFSLAVE:
109 tprints("ifr_slave=");
110 print_ifname(ifr->ifr_slave);
111 break;
112 case SIOCSIFTXQLEN:
113 case SIOCGIFTXQLEN:
114 tprintf("ifr_qlen=%d", ifr->ifr_qlen);
115 break;
116 case SIOCSIFMAP:
117 case SIOCGIFMAP:
118 tprintf("ifr_map={mem_start=%#" PRI_klx ", "
119 "mem_end=%#" PRI_klx ", base_addr=%#x, "
120 "irq=%u, dma=%u, port=%u}",
121 (kernel_ulong_t) ifr->ifr_map.mem_start,
122 (kernel_ulong_t) ifr->ifr_map.mem_end,
123 (unsigned) ifr->ifr_map.base_addr,
124 (unsigned) ifr->ifr_map.irq,
125 (unsigned) ifr->ifr_map.dma,
126 (unsigned) ifr->ifr_map.port);
127 break;
128 }
129 }
130
131 static unsigned int
print_ifc_len(int len)132 print_ifc_len(int len)
133 {
134 const unsigned int n = (unsigned int) len / sizeof(struct_ifreq);
135
136 if (len < 0 || n * sizeof(struct_ifreq) != (unsigned int) len)
137 tprintf("%d", len);
138 else
139 tprintf("%u * sizeof(struct ifreq)", n);
140
141 return n;
142 }
143
144 static bool
print_ifconf_ifreq(struct tcb * tcp,void * elem_buf,size_t elem_size,void * dummy)145 print_ifconf_ifreq(struct tcb *tcp, void *elem_buf, size_t elem_size,
146 void *dummy)
147 {
148 struct_ifreq *ifr = elem_buf;
149
150 tprints("{ifr_name=");
151 print_ifname(ifr->ifr_name);
152 tprints(", ");
153 PRINT_IFREQ_ADDR(tcp, ifr, ifr_addr);
154 tprints("}");
155
156 return true;
157 }
158
159 /*
160 * There are two different modes of operation:
161 *
162 * - Get buffer size. In this case, the callee sets ifc_buf to NULL,
163 * and the kernel returns the buffer size in ifc_len.
164 * - Get actual data. In this case, the callee specifies the buffer address
165 * in ifc_buf and its size in ifc_len. The kernel fills the buffer with
166 * the data, and its amount is returned in ifc_len.
167 *
168 * Note that, technically, the whole struct ifconf is overwritten,
169 * so ifc_buf could be different on exit, but current ioctl handler
170 * implementation does not touch it.
171 */
172 static int
decode_ifconf(struct tcb * const tcp,const kernel_ulong_t addr)173 decode_ifconf(struct tcb *const tcp, const kernel_ulong_t addr)
174 {
175 struct_ifconf *entering_ifc = NULL;
176 struct_ifconf *ifc =
177 entering(tcp) ? malloc(sizeof(*ifc)) : alloca(sizeof(*ifc));
178
179 if (exiting(tcp)) {
180 entering_ifc = get_tcb_priv_data(tcp);
181
182 if (!entering_ifc) {
183 error_msg("decode_ifconf: where is my ifconf?");
184 return 0;
185 }
186 }
187
188 if (!ifc || umove(tcp, addr, ifc) < 0) {
189 if (entering(tcp)) {
190 free(ifc);
191
192 tprints(", ");
193 printaddr(addr);
194 } else {
195 /*
196 * We failed to fetch the structure on exiting syscall,
197 * print whatever was fetched on entering syscall.
198 */
199 if (!entering_ifc->ifc_buf)
200 print_ifc_len(entering_ifc->ifc_len);
201
202 tprints(", ifc_buf=");
203 printaddr(ptr_to_kulong(entering_ifc->ifc_buf));
204
205 tprints("}");
206 }
207
208 return RVAL_DECODED | 1;
209 }
210
211 if (entering(tcp)) {
212 tprints(", {ifc_len=");
213 if (ifc->ifc_buf)
214 print_ifc_len(ifc->ifc_len);
215
216 set_tcb_priv_data(tcp, ifc, free);
217
218 return 1;
219 }
220
221 /* exiting */
222
223 if (entering_ifc->ifc_buf && (entering_ifc->ifc_len != ifc->ifc_len))
224 tprints(" => ");
225 if (!entering_ifc->ifc_buf || (entering_ifc->ifc_len != ifc->ifc_len))
226 print_ifc_len(ifc->ifc_len);
227
228 tprints(", ifc_buf=");
229
230 if (!entering_ifc->ifc_buf || syserror(tcp)) {
231 printaddr(ptr_to_kulong(entering_ifc->ifc_buf));
232 if (entering_ifc->ifc_buf != ifc->ifc_buf) {
233 tprints(" => ");
234 printaddr(ptr_to_kulong(ifc->ifc_buf));
235 }
236 } else {
237 struct_ifreq ifr;
238
239 print_array(tcp, ptr_to_kulong(ifc->ifc_buf),
240 ifc->ifc_len / sizeof(struct_ifreq),
241 &ifr, sizeof(ifr),
242 umoven_or_printaddr, print_ifconf_ifreq, NULL);
243 }
244
245 tprints("}");
246
247 return RVAL_DECODED | 1;
248 }
249
MPERS_PRINTER_DECL(int,sock_ioctl,struct tcb * tcp,const unsigned int code,const kernel_ulong_t arg)250 MPERS_PRINTER_DECL(int, sock_ioctl,
251 struct tcb *tcp, const unsigned int code,
252 const kernel_ulong_t arg)
253 {
254 struct_ifreq ifr;
255
256 switch (code) {
257 case SIOCGIFCONF:
258 return decode_ifconf(tcp, arg);
259
260 #ifdef SIOCBRADDBR
261 case SIOCBRADDBR:
262 case SIOCBRDELBR:
263 tprints(", ");
264 printstr(tcp, arg);
265 break;
266 #endif
267
268 #ifdef FIOSETOWN
269 case FIOSETOWN:
270 #endif
271 #ifdef SIOCSPGRP
272 case SIOCSPGRP:
273 #endif
274 tprints(", ");
275 printnum_int(tcp, arg, "%d");
276 break;
277
278 #ifdef FIOGETOWN
279 case FIOGETOWN:
280 #endif
281 #ifdef SIOCGPGRP
282 case SIOCGPGRP:
283 #endif
284 #ifdef SIOCATMARK
285 case SIOCATMARK:
286 #endif
287 if (entering(tcp))
288 return 0;
289 tprints(", ");
290 printnum_int(tcp, arg, "%d");
291 break;
292
293 #ifdef SIOCBRADDIF
294 case SIOCBRADDIF:
295 #endif
296 #ifdef SIOCBRDELIF
297 case SIOCBRDELIF:
298 #endif
299 /* no arguments */
300 break;
301
302 case SIOCSIFNAME:
303 case SIOCSIFADDR:
304 case SIOCSIFDSTADDR:
305 case SIOCSIFBRDADDR:
306 case SIOCSIFNETMASK:
307 case SIOCSIFFLAGS:
308 case SIOCSIFMETRIC:
309 case SIOCSIFMTU:
310 case SIOCSIFSLAVE:
311 case SIOCSIFHWADDR:
312 case SIOCSIFTXQLEN:
313 case SIOCSIFMAP:
314 tprints(", ");
315 if (umove_or_printaddr(tcp, arg, &ifr))
316 break;
317
318 tprints("{ifr_name=");
319 print_ifname(ifr.ifr_name);
320 tprints(", ");
321 if (code == SIOCSIFNAME) {
322 tprints("ifr_newname=");
323 print_ifname(ifr.ifr_newname);
324 } else {
325 print_ifreq(tcp, code, arg, &ifr);
326 }
327 tprints("}");
328 break;
329
330 case SIOCGIFNAME:
331 case SIOCGIFINDEX:
332 case SIOCGIFADDR:
333 case SIOCGIFDSTADDR:
334 case SIOCGIFBRDADDR:
335 case SIOCGIFNETMASK:
336 case SIOCGIFFLAGS:
337 case SIOCGIFMETRIC:
338 case SIOCGIFMTU:
339 case SIOCGIFSLAVE:
340 case SIOCGIFHWADDR:
341 case SIOCGIFTXQLEN:
342 case SIOCGIFMAP:
343 if (entering(tcp)) {
344 tprints(", ");
345 if (umove_or_printaddr(tcp, arg, &ifr))
346 break;
347
348 if (SIOCGIFNAME == code) {
349 tprintf("{ifr_index=%d", ifr.ifr_ifindex);
350 } else {
351 tprints("{ifr_name=");
352 print_ifname(ifr.ifr_name);
353 }
354 return 1;
355 } else {
356 if (syserror(tcp)) {
357 tprints("}");
358 break;
359 }
360
361 tprints(", ");
362 if (umove(tcp, arg, &ifr) < 0) {
363 tprints("???}");
364 break;
365 }
366
367 if (SIOCGIFNAME == code) {
368 tprints("ifr_name=");
369 print_ifname(ifr.ifr_name);
370 } else {
371 print_ifreq(tcp, code, arg, &ifr);
372 }
373 tprints("}");
374 break;
375 }
376
377 default:
378 return RVAL_DECODED;
379 }
380
381 return RVAL_DECODED | 1;
382 }
383