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Commit | Line | Data |
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c8be6d7b | 1 | /* |
bbc27441 | 2 | * Copyright (C) 1996-2014 The Squid Software Foundation and contributors |
c8be6d7b | 3 | * |
bbc27441 AJ |
4 | * Squid software is distributed under GPLv2+ license and includes |
5 | * contributions from numerous individuals and organizations. | |
6 | * Please see the COPYING and CONTRIBUTORS files for details. | |
c8be6d7b | 7 | */ |
bbc27441 AJ |
8 | |
9 | /* DEBUG: section 89 NAT / IP Interception */ | |
10 | ||
f7f3304a | 11 | #include "squid.h" |
40d34a62 | 12 | #include "comm/Connection.h" |
b3166404 | 13 | #include "fde.h" |
602d9612 | 14 | #include "ip/Intercept.h" |
5c1be108 | 15 | #include "src/tools.h" |
fc27cd70 | 16 | |
1a30fdf5 AJ |
17 | #include <cerrno> |
18 | ||
c8be6d7b | 19 | #if IPF_TRANSPARENT |
34ec5c62 | 20 | |
c8be6d7b | 21 | #if HAVE_SYS_IOCTL_H |
22 | #include <sys/ioctl.h> | |
23 | #endif | |
e9e7c285 | 24 | #if HAVE_NETINET_TCP_H |
c8be6d7b | 25 | #include <netinet/tcp.h> |
e9e7c285 | 26 | #endif |
27 | #if HAVE_NET_IF_H | |
c8be6d7b | 28 | #include <net/if.h> |
e9e7c285 | 29 | #endif |
b0dfd10b | 30 | #if HAVE_IPL_H |
dbc5782a | 31 | #include <ipl.h> |
32 | #elif HAVE_NETINET_IPL_H | |
33 | #include <netinet/ipl.h> | |
34 | #endif | |
c8be6d7b | 35 | #if HAVE_IP_FIL_COMPAT_H |
36 | #include <ip_fil_compat.h> | |
37 | #elif HAVE_NETINET_IP_FIL_COMPAT_H | |
38 | #include <netinet/ip_fil_compat.h> | |
39 | #elif HAVE_IP_COMPAT_H | |
40 | #include <ip_compat.h> | |
41 | #elif HAVE_NETINET_IP_COMPAT_H | |
42 | #include <netinet/ip_compat.h> | |
43 | #endif | |
44 | #if HAVE_IP_FIL_H | |
45 | #include <ip_fil.h> | |
46 | #elif HAVE_NETINET_IP_FIL_H | |
47 | #include <netinet/ip_fil.h> | |
48 | #endif | |
49 | #if HAVE_IP_NAT_H | |
50 | #include <ip_nat.h> | |
51 | #elif HAVE_NETINET_IP_NAT_H | |
52 | #include <netinet/ip_nat.h> | |
53 | #endif | |
34ec5c62 AJ |
54 | |
55 | #endif /* IPF_TRANSPARENT required headers */ | |
c8be6d7b | 56 | |
57 | #if PF_TRANSPARENT | |
c8be6d7b | 58 | #include <sys/socket.h> |
59 | #include <sys/ioctl.h> | |
60 | #include <sys/fcntl.h> | |
61 | #include <net/if.h> | |
62 | #include <netinet/in.h> | |
b0dfd10b | 63 | #if HAVE_NET_PF_PFVAR_H |
ec9909b0 AJ |
64 | #include <net/pf/pfvar.h> |
65 | #endif /* HAVE_NET_PF_PFVAR_H */ | |
b0dfd10b | 66 | #if HAVE_NET_PFVAR_H |
c8be6d7b | 67 | #include <net/pfvar.h> |
ec9909b0 | 68 | #endif /* HAVE_NET_PFVAR_H */ |
34ec5c62 | 69 | #endif /* PF_TRANSPARENT required headers */ |
5afac208 AJ |
70 | |
71 | #if LINUX_NETFILTER | |
074d6a40 AJ |
72 | /* <climits> must be before including netfilter_ipv4.h */ |
73 | #include <climits> | |
ee80a919 | 74 | #include <linux/if.h> |
c8be6d7b | 75 | #include <linux/netfilter_ipv4.h> |
ee80a919 AR |
76 | #if HAVE_LINUX_NETFILTER_IPV6_IP6_TABLES_H |
77 | /* 2013-07-01: Pablo the Netfilter maintainer is rejecting patches | |
78 | * which will enable C++ compilers to build the Netfilter public headers. | |
79 | * We can auto-detect its presence and attempt to use in case he ever | |
80 | * changes his mind or things get cleaned up some other way. | |
81 | * But until then are usually forced to hard-code the getsockopt() code | |
82 | * for IPv6 NAT lookups. | |
83 | */ | |
84 | #include <linux/netfilter_ipv6/ip6_tables.h> | |
85 | #endif | |
86 | #if !defined(IP6T_SO_ORIGINAL_DST) | |
f53969cc | 87 | #define IP6T_SO_ORIGINAL_DST 80 // stolen with prejudice from the above file. |
ee80a919 | 88 | #endif |
5afac208 | 89 | #endif /* LINUX_NETFILTER required headers */ |
c8be6d7b | 90 | |
0fc2952e | 91 | // single global instance for access by other components. |
b7ac5457 | 92 | Ip::Intercept Ip::Interceptor; |
0fc2952e | 93 | |
04f87469 | 94 | void |
b7ac5457 | 95 | Ip::Intercept::StopTransparency(const char *str) |
26ac0430 | 96 | { |
40d34a62 | 97 | if (transparentActive_) { |
788625af | 98 | debugs(89, DBG_IMPORTANT, "Stopping full transparency: " << str); |
40d34a62 | 99 | transparentActive_ = 0; |
788625af | 100 | } |
04f87469 AJ |
101 | } |
102 | ||
103 | void | |
b7ac5457 | 104 | Ip::Intercept::StopInterception(const char *str) |
26ac0430 | 105 | { |
40d34a62 | 106 | if (interceptActive_) { |
788625af | 107 | debugs(89, DBG_IMPORTANT, "Stopping IP interception: " << str); |
40d34a62 | 108 | interceptActive_ = 0; |
788625af | 109 | } |
04f87469 | 110 | } |
0fc2952e | 111 | |
40d34a62 AJ |
112 | bool |
113 | Ip::Intercept::NetfilterInterception(const Comm::ConnectionPointer &newConn, int silent) | |
7b0a0d1f AJ |
114 | { |
115 | #if LINUX_NETFILTER | |
ee80a919 AR |
116 | struct sockaddr_storage lookup; |
117 | socklen_t len = newConn->local.isIPv6() ? sizeof(sockaddr_in6) : sizeof(sockaddr_in); | |
118 | newConn->local.getSockAddr(lookup, AF_UNSPEC); | |
7b0a0d1f AJ |
119 | |
120 | /** \par | |
121 | * Try NAT lookup for REDIRECT or DNAT targets. */ | |
ee80a919 | 122 | if ( getsockopt(newConn->fd, |
fa0b1a25 A |
123 | newConn->local.isIPv6() ? IPPROTO_IPV6 : IPPROTO_IP, |
124 | newConn->local.isIPv6() ? IP6T_SO_ORIGINAL_DST : SO_ORIGINAL_DST, | |
125 | &lookup, | |
126 | &len) != 0) { | |
26ac0430 | 127 | if (!silent) { |
ee80a919 | 128 | debugs(89, DBG_IMPORTANT, "ERROR: NF getsockopt(ORIGINAL_DST) failed on " << newConn << ": " << xstrerror()); |
40d34a62 | 129 | lastReported_ = squid_curtime; |
7b0a0d1f | 130 | } |
ee80a919 | 131 | debugs(89, 9, "address: " << newConn); |
40d34a62 | 132 | return false; |
26ac0430 | 133 | } else { |
40d34a62 | 134 | newConn->local = lookup; |
ee80a919 | 135 | debugs(89, 5, "address NAT: " << newConn); |
40d34a62 | 136 | return true; |
7b0a0d1f | 137 | } |
7b0a0d1f | 138 | #endif |
40d34a62 | 139 | return false; |
7b0a0d1f AJ |
140 | } |
141 | ||
40d34a62 | 142 | bool |
ced8def3 | 143 | Ip::Intercept::TproxyTransparent(const Comm::ConnectionPointer &newConn, int) |
7b0a0d1f | 144 | { |
b2192042 AJ |
145 | #if (LINUX_NETFILTER && defined(IP_TRANSPARENT)) || \ |
146 | (PF_TRANSPARENT && defined(SO_BINDANY)) || \ | |
147 | (IPFW_TRANSPARENT && defined(IP_BINDANY)) | |
148 | ||
acaa7194 AJ |
149 | /* Trust the user configured properly. If not no harm done. |
150 | * We will simply attempt a bind outgoing on our own IP. | |
acaa7194 | 151 | */ |
4dd643d5 | 152 | newConn->remote.port(0); // allow random outgoing port to prevent address clashes |
40d34a62 AJ |
153 | debugs(89, 5, HERE << "address TPROXY: " << newConn); |
154 | return true; | |
155 | #else | |
156 | return false; | |
acaa7194 | 157 | #endif |
7b0a0d1f AJ |
158 | } |
159 | ||
40d34a62 | 160 | bool |
ced8def3 | 161 | Ip::Intercept::IpfwInterception(const Comm::ConnectionPointer &newConn, int) |
d8b5bcbc AJ |
162 | { |
163 | #if IPFW_TRANSPARENT | |
b2192042 AJ |
164 | /* The getsockname() call performed already provided the TCP packet details. |
165 | * There is no way to identify whether they came from NAT or not. | |
166 | * Trust the user configured properly. | |
167 | */ | |
168 | debugs(89, 5, HERE << "address NAT: " << newConn); | |
169 | return true; | |
170 | #else | |
40d34a62 | 171 | return false; |
b2192042 | 172 | #endif |
d8b5bcbc | 173 | } |
0fc2952e | 174 | |
40d34a62 AJ |
175 | bool |
176 | Ip::Intercept::IpfInterception(const Comm::ConnectionPointer &newConn, int silent) | |
3f38a55e | 177 | { |
f1e0717c | 178 | #if IPF_TRANSPARENT /* --enable-ipf-transparent */ |
62e76326 | 179 | |
c8be6d7b | 180 | struct natlookup natLookup; |
181 | static int natfd = -1; | |
c8be6d7b | 182 | int x; |
3f38a55e | 183 | |
c74be4ce | 184 | // all fields must be set to 0 |
dcfb239f | 185 | memset(&natLookup, 0, sizeof(natLookup)); |
c74be4ce | 186 | // for NAT lookup set local and remote IP:port's |
4dd643d5 AJ |
187 | natLookup.nl_inport = htons(newConn->local.port()); |
188 | newConn->local.getInAddr(natLookup.nl_inip); | |
189 | natLookup.nl_outport = htons(newConn->remote.port()); | |
190 | newConn->remote.getInAddr(natLookup.nl_outip); | |
c74be4ce | 191 | // ... and the TCP flag |
c8be6d7b | 192 | natLookup.nl_flags = IPN_TCP; |
62e76326 | 193 | |
26ac0430 | 194 | if (natfd < 0) { |
62e76326 | 195 | int save_errno; |
196 | enter_suid(); | |
dbc5782a | 197 | #ifdef IPNAT_NAME |
dbc5782a | 198 | natfd = open(IPNAT_NAME, O_RDONLY, 0); |
98a3bc99 | 199 | #else |
62e76326 | 200 | natfd = open(IPL_NAT, O_RDONLY, 0); |
98a3bc99 | 201 | #endif |
62e76326 | 202 | save_errno = errno; |
203 | leave_suid(); | |
204 | errno = save_errno; | |
c8be6d7b | 205 | } |
62e76326 | 206 | |
26ac0430 | 207 | if (natfd < 0) { |
219f8edb | 208 | if (!silent) { |
c74be4ce | 209 | debugs(89, DBG_IMPORTANT, "IPF (IPFilter) NAT open failed: " << xstrerror()); |
40d34a62 AJ |
210 | lastReported_ = squid_curtime; |
211 | return false; | |
d6026916 | 212 | } |
c8be6d7b | 213 | } |
62e76326 | 214 | |
dbc5782a | 215 | #if defined(IPFILTER_VERSION) && (IPFILTER_VERSION >= 4000027) |
c74be4ce AJ |
216 | struct ipfobj obj; |
217 | memset(&obj, 0, sizeof(obj)); | |
218 | obj.ipfo_rev = IPFILTER_VERSION; | |
219 | obj.ipfo_size = sizeof(natLookup); | |
220 | obj.ipfo_ptr = &natLookup; | |
221 | obj.ipfo_type = IPFOBJ_NATLOOKUP; | |
222 | ||
dbc5782a | 223 | x = ioctl(natfd, SIOCGNATL, &obj); |
dbc5782a | 224 | #else |
3f38a55e | 225 | /* |
dbc5782a | 226 | * IP-Filter changed the type for SIOCGNATL between |
227 | * 3.3 and 3.4. It also changed the cmd value for | |
228 | * SIOCGNATL, so at least we can detect it. We could | |
229 | * put something in configure and use ifdefs here, but | |
230 | * this seems simpler. | |
231 | */ | |
c74be4ce | 232 | static int siocgnatl_cmd = SIOCGNATL & 0xff; |
26ac0430 | 233 | if (63 == siocgnatl_cmd) { |
62e76326 | 234 | struct natlookup *nlp = &natLookup; |
235 | x = ioctl(natfd, SIOCGNATL, &nlp); | |
26ac0430 | 236 | } else { |
62e76326 | 237 | x = ioctl(natfd, SIOCGNATL, &natLookup); |
238 | } | |
239 | ||
dbc5782a | 240 | #endif |
26ac0430 | 241 | if (x < 0) { |
62e76326 | 242 | if (errno != ESRCH) { |
219f8edb | 243 | if (!silent) { |
c74be4ce | 244 | debugs(89, DBG_IMPORTANT, "IPF (IPFilter) NAT lookup failed: ioctl(SIOCGNATL) (v=" << IPFILTER_VERSION << "): " << xstrerror()); |
40d34a62 | 245 | lastReported_ = squid_curtime; |
d6026916 | 246 | } |
247 | ||
62e76326 | 248 | close(natfd); |
249 | natfd = -1; | |
250 | } | |
251 | ||
40d34a62 AJ |
252 | debugs(89, 9, HERE << "address: " << newConn); |
253 | return false; | |
26ac0430 | 254 | } else { |
40d34a62 | 255 | newConn->local = natLookup.nl_realip; |
4dd643d5 | 256 | newConn->local.port(ntohs(natLookup.nl_realport)); |
40d34a62 AJ |
257 | debugs(89, 5, HERE << "address NAT: " << newConn); |
258 | return true; | |
c8be6d7b | 259 | } |
62e76326 | 260 | |
219f8edb | 261 | #endif /* --enable-ipf-transparent */ |
40d34a62 | 262 | return false; |
219f8edb | 263 | } |
f1e0717c | 264 | |
1125ea7b | 265 | bool |
b2192042 | 266 | Ip::Intercept::PfInterception(const Comm::ConnectionPointer &newConn, int silent) |
1125ea7b | 267 | { |
b2192042 AJ |
268 | #if PF_TRANSPARENT /* --enable-pf-transparent */ |
269 | ||
270 | #if !USE_NAT_DEVPF | |
271 | /* On recent PF versions the getsockname() call performed already provided | |
272 | * the required TCP packet details. | |
273 | * There is no way to identify whether they came from NAT or not. | |
274 | * | |
275 | * Trust the user configured properly. | |
1125ea7b | 276 | */ |
b2192042 | 277 | debugs(89, 5, HERE << "address NAT divert-to: " << newConn); |
1125ea7b | 278 | return true; |
1125ea7b | 279 | |
b2192042 | 280 | #else /* USE_NAT_DEVPF / --with-nat-devpf */ |
62e76326 | 281 | |
3f38a55e | 282 | struct pfioc_natlook nl; |
283 | static int pffd = -1; | |
62e76326 | 284 | |
285 | if (pffd < 0) | |
d14c6ef2 | 286 | pffd = open("/dev/pf", O_RDONLY); |
62e76326 | 287 | |
26ac0430 | 288 | if (pffd < 0) { |
51f4d36b | 289 | if (!silent) { |
e9172f79 | 290 | debugs(89, DBG_IMPORTANT, HERE << "PF open failed: " << xstrerror()); |
40d34a62 | 291 | lastReported_ = squid_curtime; |
d6026916 | 292 | } |
40d34a62 | 293 | return false; |
c8be6d7b | 294 | } |
62e76326 | 295 | |
c8be6d7b | 296 | memset(&nl, 0, sizeof(struct pfioc_natlook)); |
4dd643d5 AJ |
297 | newConn->remote.getInAddr(nl.saddr.v4); |
298 | nl.sport = htons(newConn->remote.port()); | |
cc192b50 | 299 | |
4dd643d5 AJ |
300 | newConn->local.getInAddr(nl.daddr.v4); |
301 | nl.dport = htons(newConn->local.port()); | |
cc192b50 | 302 | |
c8be6d7b | 303 | nl.af = AF_INET; |
304 | nl.proto = IPPROTO_TCP; | |
305 | nl.direction = PF_OUT; | |
62e76326 | 306 | |
26ac0430 | 307 | if (ioctl(pffd, DIOCNATLOOK, &nl)) { |
62e76326 | 308 | if (errno != ENOENT) { |
51f4d36b | 309 | if (!silent) { |
e9172f79 | 310 | debugs(89, DBG_IMPORTANT, HERE << "PF lookup failed: ioctl(DIOCNATLOOK)"); |
40d34a62 | 311 | lastReported_ = squid_curtime; |
d6026916 | 312 | } |
62e76326 | 313 | close(pffd); |
314 | pffd = -1; | |
315 | } | |
40d34a62 AJ |
316 | debugs(89, 9, HERE << "address: " << newConn); |
317 | return false; | |
26ac0430 | 318 | } else { |
40d34a62 | 319 | newConn->local = nl.rdaddr.v4; |
4dd643d5 | 320 | newConn->local.port(ntohs(nl.rdport)); |
40d34a62 AJ |
321 | debugs(89, 5, HERE << "address NAT: " << newConn); |
322 | return true; | |
3f38a55e | 323 | } |
b2192042 | 324 | #endif /* --with-nat-devpf */ |
51f4d36b | 325 | #endif /* --enable-pf-transparent */ |
40d34a62 | 326 | return false; |
51f4d36b AJ |
327 | } |
328 | ||
40d34a62 AJ |
329 | bool |
330 | Ip::Intercept::Lookup(const Comm::ConnectionPointer &newConn, const Comm::ConnectionPointer &listenConn) | |
51f4d36b | 331 | { |
af6a12ee AJ |
332 | /* --enable-linux-netfilter */ |
333 | /* --enable-ipfw-transparent */ | |
334 | /* --enable-ipf-transparent */ | |
335 | /* --enable-pf-transparent */ | |
51f4d36b AJ |
336 | #if IPF_TRANSPARENT || LINUX_NETFILTER || IPFW_TRANSPARENT || PF_TRANSPARENT |
337 | ||
51f4d36b AJ |
338 | #if 0 |
339 | // Crop interception errors down to one per minute. | |
40d34a62 | 340 | int silent = (squid_curtime - lastReported_ > 60 ? 0 : 1); |
51f4d36b AJ |
341 | #else |
342 | // Show all interception errors. | |
343 | int silent = 0; | |
344 | #endif | |
345 | ||
40d34a62 AJ |
346 | debugs(89, 5, HERE << "address BEGIN: me/client= " << newConn->local << ", destination/me= " << newConn->remote); |
347 | ||
348 | newConn->flags |= (listenConn->flags & (COMM_TRANSPARENT|COMM_INTERCEPTION)); | |
e9172f79 | 349 | |
9bad3e09 | 350 | /* NP: try TPROXY first, its much quieter than NAT when non-matching */ |
40d34a62 | 351 | if (transparentActive_ && listenConn->flags&COMM_TRANSPARENT) { |
b2192042 | 352 | if (TproxyTransparent(newConn, silent)) return true; |
9bad3e09 AJ |
353 | } |
354 | ||
40d34a62 | 355 | if (interceptActive_ && listenConn->flags&COMM_INTERCEPTION) { |
e9172f79 | 356 | /* NAT methods that use sock-opts to return client address */ |
40d34a62 AJ |
357 | if (NetfilterInterception(newConn, silent)) return true; |
358 | if (IpfwInterception(newConn, silent)) return true; | |
e9172f79 AJ |
359 | |
360 | /* NAT methods that use ioctl to return client address AND destination address */ | |
40d34a62 AJ |
361 | if (PfInterception(newConn, silent)) return true; |
362 | if (IpfInterception(newConn, silent)) return true; | |
51f4d36b | 363 | } |
f1e0717c | 364 | |
51f4d36b | 365 | #else /* none of the transparent options configured */ |
e9172f79 | 366 | debugs(89, DBG_IMPORTANT, "WARNING: transparent proxying not supported"); |
3f38a55e | 367 | #endif |
368 | ||
40d34a62 | 369 | return false; |
f1e0717c | 370 | } |
34ec5c62 | 371 | |
263f84f0 | 372 | bool |
b7ac5457 | 373 | Ip::Intercept::ProbeForTproxy(Ip::Address &test) |
263f84f0 | 374 | { |
b2192042 AJ |
375 | bool doneSuid = false; |
376 | ||
377 | #if _SQUID_LINUX_ && defined(IP_TRANSPARENT) // Linux | |
378 | # define soLevel SOL_IP | |
379 | # define soFlag IP_TRANSPARENT | |
380 | ||
381 | #elif defined(SO_BINDANY) // OpenBSD 4.7+ and NetBSD with PF | |
382 | # define soLevel SOL_SOCKET | |
383 | # define soFlag SO_BINDANY | |
384 | enter_suid(); | |
385 | doneSuid = true; | |
386 | ||
387 | #elif defined(IP_BINDANY) // FreeBSD with IPFW | |
388 | # define soLevel IPPROTO_IP | |
389 | # define soFlag IP_BINDANY | |
390 | enter_suid(); | |
391 | doneSuid = true; | |
392 | ||
393 | #endif | |
394 | ||
395 | #if defined(soLevel) && defined(soFlag) | |
396 | ||
1125ea7b | 397 | debugs(3, 3, "Detect TPROXY support on port " << test); |
263f84f0 AJ |
398 | |
399 | int tos = 1; | |
400 | int tmp_sock = -1; | |
401 | ||
263f84f0 | 402 | /* Probe to see if the Kernel TPROXY support is IPv6-enabled */ |
4dd643d5 | 403 | if (test.isIPv6()) { |
263f84f0 AJ |
404 | debugs(3, 3, "...Probing for IPv6 TPROXY support."); |
405 | ||
406 | struct sockaddr_in6 tmp_ip6; | |
b7ac5457 | 407 | Ip::Address tmp = "::2"; |
4dd643d5 AJ |
408 | tmp.port(0); |
409 | tmp.getSockAddr(tmp_ip6); | |
263f84f0 AJ |
410 | |
411 | if ( (tmp_sock = socket(PF_INET6, SOCK_STREAM, IPPROTO_TCP)) >= 0 && | |
b2192042 | 412 | setsockopt(tmp_sock, soLevel, soFlag, (char *)&tos, sizeof(int)) == 0 && |
f54f527e | 413 | bind(tmp_sock, (struct sockaddr*)&tmp_ip6, sizeof(struct sockaddr_in6)) == 0 ) { |
263f84f0 AJ |
414 | |
415 | debugs(3, 3, "IPv6 TPROXY support detected. Using."); | |
fb5bffa3 | 416 | close(tmp_sock); |
b2192042 AJ |
417 | if (doneSuid) |
418 | leave_suid(); | |
263f84f0 AJ |
419 | return true; |
420 | } | |
421 | if (tmp_sock >= 0) { | |
fb5bffa3 | 422 | close(tmp_sock); |
263f84f0 AJ |
423 | tmp_sock = -1; |
424 | } | |
425 | } | |
426 | ||
4dd643d5 | 427 | if ( test.isIPv6() && !test.setIPv4() ) { |
263f84f0 | 428 | debugs(3, DBG_CRITICAL, "TPROXY lacks IPv6 support for " << test ); |
b2192042 AJ |
429 | if (doneSuid) |
430 | leave_suid(); | |
263f84f0 AJ |
431 | return false; |
432 | } | |
263f84f0 AJ |
433 | |
434 | /* Probe to see if the Kernel TPROXY support is IPv4-enabled (aka present) */ | |
4dd643d5 | 435 | if (test.isIPv4()) { |
263f84f0 AJ |
436 | debugs(3, 3, "...Probing for IPv4 TPROXY support."); |
437 | ||
438 | struct sockaddr_in tmp_ip4; | |
b7ac5457 | 439 | Ip::Address tmp = "127.0.0.2"; |
4dd643d5 AJ |
440 | tmp.port(0); |
441 | tmp.getSockAddr(tmp_ip4); | |
263f84f0 AJ |
442 | |
443 | if ( (tmp_sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) >= 0 && | |
b2192042 | 444 | setsockopt(tmp_sock, soLevel, soFlag, (char *)&tos, sizeof(int)) == 0 && |
f54f527e | 445 | bind(tmp_sock, (struct sockaddr*)&tmp_ip4, sizeof(struct sockaddr_in)) == 0 ) { |
263f84f0 AJ |
446 | |
447 | debugs(3, 3, "IPv4 TPROXY support detected. Using."); | |
fb5bffa3 | 448 | close(tmp_sock); |
b2192042 AJ |
449 | if (doneSuid) |
450 | leave_suid(); | |
263f84f0 AJ |
451 | return true; |
452 | } | |
453 | if (tmp_sock >= 0) { | |
fb5bffa3 | 454 | close(tmp_sock); |
263f84f0 AJ |
455 | } |
456 | } | |
457 | ||
1125ea7b MM |
458 | #else |
459 | debugs(3, 3, "TPROXY setsockopt() not supported on this platform. Disabling TPROXY."); | |
460 | ||
263f84f0 | 461 | #endif |
b2192042 AJ |
462 | if (doneSuid) |
463 | leave_suid(); | |
263f84f0 AJ |
464 | return false; |
465 | } | |
f53969cc | 466 |