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 #include "print_fields.h"
31
32 #include <sys/socket.h>
33 #if defined ALPHA || defined SH || defined SH64
34 # include <linux/ioctl.h>
35 #endif
36 #include <linux/sockios.h>
37 #include <arpa/inet.h>
38 #include <net/if.h>
39
40 #include DEF_MPERS_TYPE(struct_ifconf)
41 #include DEF_MPERS_TYPE(struct_ifreq)
42
43 typedef struct ifconf struct_ifconf;
44 typedef struct ifreq struct_ifreq;
45
46 #include MPERS_DEFS
47
48 #include "xlat/iffflags.h"
49
50 static void
print_ifname(const char * ifname)51 print_ifname(const char *ifname)
52 {
53 print_quoted_string(ifname, IFNAMSIZ + 1, QUOTE_0_TERMINATED);
54 }
55
56 static void
print_ifreq(struct tcb * const tcp,const unsigned int code,const kernel_ulong_t arg,const struct_ifreq * const ifr)57 print_ifreq(struct tcb *const tcp, const unsigned int code,
58 const kernel_ulong_t arg, const struct_ifreq *const ifr)
59 {
60 switch (code) {
61 case SIOCSIFADDR:
62 case SIOCGIFADDR:
63 PRINT_FIELD_SOCKADDR("", *ifr, ifr_addr);
64 break;
65 case SIOCSIFDSTADDR:
66 case SIOCGIFDSTADDR:
67 PRINT_FIELD_SOCKADDR("", *ifr, ifr_dstaddr);
68 break;
69 case SIOCSIFBRDADDR:
70 case SIOCGIFBRDADDR:
71 PRINT_FIELD_SOCKADDR("", *ifr, ifr_broadaddr);
72 break;
73 case SIOCSIFNETMASK:
74 case SIOCGIFNETMASK:
75 PRINT_FIELD_SOCKADDR("", *ifr, ifr_netmask);
76 break;
77 case SIOCSIFHWADDR:
78 case SIOCGIFHWADDR: {
79 /* XXX Are there other hardware addresses
80 than 6-byte MACs? */
81 const unsigned char *bytes =
82 (unsigned char *) &ifr->ifr_hwaddr.sa_data;
83 tprintf("ifr_hwaddr=%02x:%02x:%02x:%02x:%02x:%02x",
84 bytes[0], bytes[1], bytes[2],
85 bytes[3], bytes[4], bytes[5]);
86 break;
87 }
88 case SIOCSIFFLAGS:
89 case SIOCGIFFLAGS:
90 tprints("ifr_flags=");
91 printflags(iffflags, (unsigned short) ifr->ifr_flags, "IFF_???");
92 break;
93 case SIOCSIFMETRIC:
94 case SIOCGIFMETRIC:
95 tprintf("ifr_metric=%d", ifr->ifr_metric);
96 break;
97 case SIOCSIFMTU:
98 case SIOCGIFMTU:
99 tprintf("ifr_mtu=%d", ifr->ifr_mtu);
100 break;
101 case SIOCSIFSLAVE:
102 case SIOCGIFSLAVE:
103 tprints("ifr_slave=");
104 print_ifname(ifr->ifr_slave);
105 break;
106 case SIOCSIFTXQLEN:
107 case SIOCGIFTXQLEN:
108 tprintf("ifr_qlen=%d", ifr->ifr_qlen);
109 break;
110 case SIOCSIFMAP:
111 case SIOCGIFMAP:
112 tprintf("ifr_map={mem_start=%#" PRI_klx ", "
113 "mem_end=%#" PRI_klx ", base_addr=%#x, "
114 "irq=%u, dma=%u, port=%u}",
115 (kernel_ulong_t) ifr->ifr_map.mem_start,
116 (kernel_ulong_t) ifr->ifr_map.mem_end,
117 (unsigned) ifr->ifr_map.base_addr,
118 (unsigned) ifr->ifr_map.irq,
119 (unsigned) ifr->ifr_map.dma,
120 (unsigned) ifr->ifr_map.port);
121 break;
122 }
123 }
124
125 static unsigned int
print_ifc_len(int len)126 print_ifc_len(int len)
127 {
128 const unsigned int n = (unsigned int) len / sizeof(struct_ifreq);
129
130 if (len < 0 || n * sizeof(struct_ifreq) != (unsigned int) len)
131 tprintf("%d", len);
132 else
133 tprintf("%u * sizeof(struct ifreq)", n);
134
135 return n;
136 }
137
138 static bool
print_ifconf_ifreq(struct tcb * tcp,void * elem_buf,size_t elem_size,void * dummy)139 print_ifconf_ifreq(struct tcb *tcp, void *elem_buf, size_t elem_size,
140 void *dummy)
141 {
142 struct_ifreq *ifr = elem_buf;
143
144 tprints("{ifr_name=");
145 print_ifname(ifr->ifr_name);
146 PRINT_FIELD_SOCKADDR(", ", *ifr, ifr_addr);
147 tprints("}");
148
149 return true;
150 }
151
152 /*
153 * There are two different modes of operation:
154 *
155 * - Get buffer size. In this case, the callee sets ifc_buf to NULL,
156 * and the kernel returns the buffer size in ifc_len.
157 * - Get actual data. In this case, the callee specifies the buffer address
158 * in ifc_buf and its size in ifc_len. The kernel fills the buffer with
159 * the data, and its amount is returned in ifc_len.
160 *
161 * Note that, technically, the whole struct ifconf is overwritten,
162 * so ifc_buf could be different on exit, but current ioctl handler
163 * implementation does not touch it.
164 */
165 static int
decode_ifconf(struct tcb * const tcp,const kernel_ulong_t addr)166 decode_ifconf(struct tcb *const tcp, const kernel_ulong_t addr)
167 {
168 struct_ifconf *entering_ifc = NULL;
169 struct_ifconf *ifc =
170 entering(tcp) ? malloc(sizeof(*ifc)) : alloca(sizeof(*ifc));
171
172 if (exiting(tcp)) {
173 entering_ifc = get_tcb_priv_data(tcp);
174
175 if (!entering_ifc) {
176 error_msg("decode_ifconf: where is my ifconf?");
177 return 0;
178 }
179 }
180
181 if (!ifc || umove(tcp, addr, ifc) < 0) {
182 if (entering(tcp)) {
183 free(ifc);
184
185 tprints(", ");
186 printaddr(addr);
187 } else {
188 /*
189 * We failed to fetch the structure on exiting syscall,
190 * print whatever was fetched on entering syscall.
191 */
192 if (!entering_ifc->ifc_buf)
193 print_ifc_len(entering_ifc->ifc_len);
194
195 tprints(", ifc_buf=");
196 printaddr(ptr_to_kulong(entering_ifc->ifc_buf));
197
198 tprints("}");
199 }
200
201 return RVAL_IOCTL_DECODED;
202 }
203
204 if (entering(tcp)) {
205 tprints(", {ifc_len=");
206 if (ifc->ifc_buf)
207 print_ifc_len(ifc->ifc_len);
208
209 set_tcb_priv_data(tcp, ifc, free);
210
211 return 0;
212 }
213
214 /* exiting */
215
216 if (entering_ifc->ifc_buf && (entering_ifc->ifc_len != ifc->ifc_len))
217 tprints(" => ");
218 if (!entering_ifc->ifc_buf || (entering_ifc->ifc_len != ifc->ifc_len))
219 print_ifc_len(ifc->ifc_len);
220
221 tprints(", ifc_buf=");
222
223 if (!entering_ifc->ifc_buf || syserror(tcp)) {
224 printaddr(ptr_to_kulong(entering_ifc->ifc_buf));
225 if (entering_ifc->ifc_buf != ifc->ifc_buf) {
226 tprints(" => ");
227 printaddr(ptr_to_kulong(ifc->ifc_buf));
228 }
229 } else {
230 struct_ifreq ifr;
231
232 print_array(tcp, ptr_to_kulong(ifc->ifc_buf),
233 ifc->ifc_len / sizeof(struct_ifreq),
234 &ifr, sizeof(ifr),
235 umoven_or_printaddr, print_ifconf_ifreq, NULL);
236 }
237
238 tprints("}");
239
240 return RVAL_IOCTL_DECODED;
241 }
242
MPERS_PRINTER_DECL(int,sock_ioctl,struct tcb * tcp,const unsigned int code,const kernel_ulong_t arg)243 MPERS_PRINTER_DECL(int, sock_ioctl,
244 struct tcb *tcp, const unsigned int code,
245 const kernel_ulong_t arg)
246 {
247 struct_ifreq ifr;
248
249 switch (code) {
250 case SIOCGIFCONF:
251 return decode_ifconf(tcp, arg);
252
253 #ifdef SIOCBRADDBR
254 case SIOCBRADDBR:
255 case SIOCBRDELBR:
256 tprints(", ");
257 printstr(tcp, arg);
258 break;
259 #endif
260
261 #ifdef FIOSETOWN
262 case FIOSETOWN:
263 #endif
264 #ifdef SIOCSPGRP
265 case SIOCSPGRP:
266 #endif
267 tprints(", ");
268 printnum_int(tcp, arg, "%d");
269 break;
270
271 #ifdef FIOGETOWN
272 case FIOGETOWN:
273 #endif
274 #ifdef SIOCGPGRP
275 case SIOCGPGRP:
276 #endif
277 #ifdef SIOCATMARK
278 case SIOCATMARK:
279 #endif
280 if (entering(tcp))
281 return 0;
282 tprints(", ");
283 printnum_int(tcp, arg, "%d");
284 break;
285
286 #ifdef SIOCBRADDIF
287 case SIOCBRADDIF:
288 #endif
289 #ifdef SIOCBRDELIF
290 case SIOCBRDELIF:
291 #endif
292 /* no arguments */
293 break;
294
295 case SIOCSIFNAME:
296 case SIOCSIFADDR:
297 case SIOCSIFDSTADDR:
298 case SIOCSIFBRDADDR:
299 case SIOCSIFNETMASK:
300 case SIOCSIFFLAGS:
301 case SIOCSIFMETRIC:
302 case SIOCSIFMTU:
303 case SIOCSIFSLAVE:
304 case SIOCSIFHWADDR:
305 case SIOCSIFTXQLEN:
306 case SIOCSIFMAP:
307 tprints(", ");
308 if (umove_or_printaddr(tcp, arg, &ifr))
309 break;
310
311 tprints("{ifr_name=");
312 print_ifname(ifr.ifr_name);
313 tprints(", ");
314 if (code == SIOCSIFNAME) {
315 tprints("ifr_newname=");
316 print_ifname(ifr.ifr_newname);
317 } else {
318 print_ifreq(tcp, code, arg, &ifr);
319 }
320 tprints("}");
321 break;
322
323 case SIOCGIFNAME:
324 case SIOCGIFINDEX:
325 case SIOCGIFADDR:
326 case SIOCGIFDSTADDR:
327 case SIOCGIFBRDADDR:
328 case SIOCGIFNETMASK:
329 case SIOCGIFFLAGS:
330 case SIOCGIFMETRIC:
331 case SIOCGIFMTU:
332 case SIOCGIFSLAVE:
333 case SIOCGIFHWADDR:
334 case SIOCGIFTXQLEN:
335 case SIOCGIFMAP:
336 if (entering(tcp)) {
337 tprints(", ");
338 if (umove_or_printaddr(tcp, arg, &ifr))
339 break;
340
341 if (SIOCGIFNAME == code) {
342 tprintf("{ifr_index=%d", ifr.ifr_ifindex);
343 } else {
344 tprints("{ifr_name=");
345 print_ifname(ifr.ifr_name);
346 }
347 return 0;
348 } else {
349 if (syserror(tcp)) {
350 tprints("}");
351 break;
352 }
353
354 tprints(", ");
355 if (umove(tcp, arg, &ifr) < 0) {
356 tprints("???}");
357 break;
358 }
359
360 if (SIOCGIFNAME == code) {
361 tprints("ifr_name=");
362 print_ifname(ifr.ifr_name);
363 } else {
364 print_ifreq(tcp, code, arg, &ifr);
365 }
366 tprints("}");
367 break;
368 }
369
370 default:
371 return RVAL_DECODED;
372 }
373
374 return RVAL_IOCTL_DECODED;
375 }
376