1 /*
2 * Copyright 2015 The WebRTC Project Authors. All rights reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #include <net/if.h>
12 #include <sys/ioctl.h>
13 #include <unistd.h>
14
15 #include "webrtc/base/checks.h"
16 #include "webrtc/base/ifaddrs_converter.h"
17 #include "webrtc/base/logging.h"
18 #include "webrtc/base/scoped_ptr.h"
19
20 #if !defined(WEBRTC_IOS)
21 #include <net/if_media.h>
22 #include <netinet/in_var.h>
23 #else // WEBRTC_IOS
24 #define SCOPE6_ID_MAX 16
25
26 struct in6_addrlifetime {
27 time_t ia6t_expire; /* valid lifetime expiration time */
28 time_t ia6t_preferred; /* preferred lifetime expiration time */
29 u_int32_t ia6t_vltime; /* valid lifetime */
30 u_int32_t ia6t_pltime; /* prefix lifetime */
31 };
32
33 struct in6_ifstat {
34 u_quad_t ifs6_in_receive; /* # of total input datagram */
35 u_quad_t ifs6_in_hdrerr; /* # of datagrams with invalid hdr */
36 u_quad_t ifs6_in_toobig; /* # of datagrams exceeded MTU */
37 u_quad_t ifs6_in_noroute; /* # of datagrams with no route */
38 u_quad_t ifs6_in_addrerr; /* # of datagrams with invalid dst */
39 u_quad_t ifs6_in_protounknown; /* # of datagrams with unknown proto */
40 /* NOTE: increment on final dst if */
41 u_quad_t ifs6_in_truncated; /* # of truncated datagrams */
42 u_quad_t ifs6_in_discard; /* # of discarded datagrams */
43 /* NOTE: fragment timeout is not here */
44 u_quad_t ifs6_in_deliver; /* # of datagrams delivered to ULP */
45 /* NOTE: increment on final dst if */
46 u_quad_t ifs6_out_forward; /* # of datagrams forwarded */
47 /* NOTE: increment on outgoing if */
48 u_quad_t ifs6_out_request; /* # of outgoing datagrams from ULP */
49 /* NOTE: does not include forwrads */
50 u_quad_t ifs6_out_discard; /* # of discarded datagrams */
51 u_quad_t ifs6_out_fragok; /* # of datagrams fragmented */
52 u_quad_t ifs6_out_fragfail; /* # of datagrams failed on fragment */
53 u_quad_t ifs6_out_fragcreat; /* # of fragment datagrams */
54 /* NOTE: this is # after fragment */
55 u_quad_t ifs6_reass_reqd; /* # of incoming fragmented packets */
56 /* NOTE: increment on final dst if */
57 u_quad_t ifs6_reass_ok; /* # of reassembled packets */
58 /* NOTE: this is # after reass */
59 /* NOTE: increment on final dst if */
60 u_quad_t ifs6_reass_fail; /* # of reass failures */
61 /* NOTE: may not be packet count */
62 /* NOTE: increment on final dst if */
63 u_quad_t ifs6_in_mcast; /* # of inbound multicast datagrams */
64 u_quad_t ifs6_out_mcast; /* # of outbound multicast datagrams */
65 };
66 struct icmp6_ifstat {
67 /*
68 * Input statistics
69 */
70 /* ipv6IfIcmpInMsgs, total # of input messages */
71 u_quad_t ifs6_in_msg;
72 /* ipv6IfIcmpInErrors, # of input error messages */
73 u_quad_t ifs6_in_error;
74 /* ipv6IfIcmpInDestUnreachs, # of input dest unreach errors */
75 u_quad_t ifs6_in_dstunreach;
76 /* ipv6IfIcmpInAdminProhibs, # of input admin. prohibited errs */
77 u_quad_t ifs6_in_adminprohib;
78 /* ipv6IfIcmpInTimeExcds, # of input time exceeded errors */
79 u_quad_t ifs6_in_timeexceed;
80 /* ipv6IfIcmpInParmProblems, # of input parameter problem errors */
81 u_quad_t ifs6_in_paramprob;
82 /* ipv6IfIcmpInPktTooBigs, # of input packet too big errors */
83 u_quad_t ifs6_in_pkttoobig;
84 /* ipv6IfIcmpInEchos, # of input echo requests */
85 u_quad_t ifs6_in_echo;
86 /* ipv6IfIcmpInEchoReplies, # of input echo replies */
87 u_quad_t ifs6_in_echoreply;
88 /* ipv6IfIcmpInRouterSolicits, # of input router solicitations */
89 u_quad_t ifs6_in_routersolicit;
90 /* ipv6IfIcmpInRouterAdvertisements, # of input router advertisements */
91 u_quad_t ifs6_in_routeradvert;
92 /* ipv6IfIcmpInNeighborSolicits, # of input neighbor solicitations */
93 u_quad_t ifs6_in_neighborsolicit;
94 /* ipv6IfIcmpInNeighborAdvertisements, # of input neighbor advs. */
95 u_quad_t ifs6_in_neighboradvert;
96 /* ipv6IfIcmpInRedirects, # of input redirects */
97 u_quad_t ifs6_in_redirect;
98 /* ipv6IfIcmpInGroupMembQueries, # of input MLD queries */
99 u_quad_t ifs6_in_mldquery;
100 /* ipv6IfIcmpInGroupMembResponses, # of input MLD reports */
101 u_quad_t ifs6_in_mldreport;
102 /* ipv6IfIcmpInGroupMembReductions, # of input MLD done */
103 u_quad_t ifs6_in_mlddone;
104
105 /*
106 * Output statistics. We should solve unresolved routing problem...
107 */
108 /* ipv6IfIcmpOutMsgs, total # of output messages */
109 u_quad_t ifs6_out_msg;
110 /* ipv6IfIcmpOutErrors, # of output error messages */
111 u_quad_t ifs6_out_error;
112 /* ipv6IfIcmpOutDestUnreachs, # of output dest unreach errors */
113 u_quad_t ifs6_out_dstunreach;
114 /* ipv6IfIcmpOutAdminProhibs, # of output admin. prohibited errs */
115 u_quad_t ifs6_out_adminprohib;
116 /* ipv6IfIcmpOutTimeExcds, # of output time exceeded errors */
117 u_quad_t ifs6_out_timeexceed;
118 /* ipv6IfIcmpOutParmProblems, # of output parameter problem errors */
119 u_quad_t ifs6_out_paramprob;
120 /* ipv6IfIcmpOutPktTooBigs, # of output packet too big errors */
121 u_quad_t ifs6_out_pkttoobig;
122 /* ipv6IfIcmpOutEchos, # of output echo requests */
123 u_quad_t ifs6_out_echo;
124 /* ipv6IfIcmpOutEchoReplies, # of output echo replies */
125 u_quad_t ifs6_out_echoreply;
126 /* ipv6IfIcmpOutRouterSolicits, # of output router solicitations */
127 u_quad_t ifs6_out_routersolicit;
128 /* ipv6IfIcmpOutRouterAdvertisements, # of output router advs. */
129 u_quad_t ifs6_out_routeradvert;
130 /* ipv6IfIcmpOutNeighborSolicits, # of output neighbor solicitations */
131 u_quad_t ifs6_out_neighborsolicit;
132 /* ipv6IfIcmpOutNeighborAdvertisements, # of output neighbor advs. */
133 u_quad_t ifs6_out_neighboradvert;
134 /* ipv6IfIcmpOutRedirects, # of output redirects */
135 u_quad_t ifs6_out_redirect;
136 /* ipv6IfIcmpOutGroupMembQueries, # of output MLD queries */
137 u_quad_t ifs6_out_mldquery;
138 /* ipv6IfIcmpOutGroupMembResponses, # of output MLD reports */
139 u_quad_t ifs6_out_mldreport;
140 /* ipv6IfIcmpOutGroupMembReductions, # of output MLD done */
141 u_quad_t ifs6_out_mlddone;
142 };
143
144 struct in6_ifreq {
145 char ifr_name[IFNAMSIZ];
146 union {
147 struct sockaddr_in6 ifru_addr;
148 struct sockaddr_in6 ifru_dstaddr;
149 int ifru_flags;
150 int ifru_flags6;
151 int ifru_metric;
152 int ifru_intval;
153 caddr_t ifru_data;
154 struct in6_addrlifetime ifru_lifetime;
155 struct in6_ifstat ifru_stat;
156 struct icmp6_ifstat ifru_icmp6stat;
157 u_int32_t ifru_scope_id[SCOPE6_ID_MAX];
158 } ifr_ifru;
159 };
160
161 #define SIOCGIFAFLAG_IN6 _IOWR('i', 73, struct in6_ifreq)
162
163 #define IN6_IFF_ANYCAST 0x0001 /* anycast address */
164 #define IN6_IFF_TENTATIVE 0x0002 /* tentative address */
165 #define IN6_IFF_DUPLICATED 0x0004 /* DAD detected duplicate */
166 #define IN6_IFF_DETACHED 0x0008 /* may be detached from the link */
167 #define IN6_IFF_DEPRECATED 0x0010 /* deprecated address */
168 #define IN6_IFF_TEMPORARY 0x0080 /* temporary (anonymous) address. */
169
170 #endif // WEBRTC_IOS
171
172 namespace rtc {
173
174 namespace {
175
176 class IPv6AttributesGetter {
177 public:
178 IPv6AttributesGetter();
179 virtual ~IPv6AttributesGetter();
180 bool IsInitialized() const;
181 bool GetIPAttributes(const char* ifname,
182 const sockaddr* sock_addr,
183 int* native_attributes);
184
185 private:
186 // on MAC or IOS, we have to use ioctl with a socket to query an IPv6
187 // interface's attribute.
188 int ioctl_socket_;
189 };
190
IPv6AttributesGetter()191 IPv6AttributesGetter::IPv6AttributesGetter()
192 : ioctl_socket_(
193 socket(AF_INET6, SOCK_DGRAM, 0 /* unspecified protocol */)) {
194 RTC_DCHECK_GE(ioctl_socket_, 0);
195 }
196
IsInitialized() const197 bool IPv6AttributesGetter::IsInitialized() const {
198 return ioctl_socket_ >= 0;
199 }
200
~IPv6AttributesGetter()201 IPv6AttributesGetter::~IPv6AttributesGetter() {
202 if (!IsInitialized()) {
203 return;
204 }
205 close(ioctl_socket_);
206 }
207
GetIPAttributes(const char * ifname,const sockaddr * sock_addr,int * native_attributes)208 bool IPv6AttributesGetter::GetIPAttributes(const char* ifname,
209 const sockaddr* sock_addr,
210 int* native_attributes) {
211 if (!IsInitialized()) {
212 return false;
213 }
214
215 struct in6_ifreq ifr = {};
216 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
217 memcpy(&ifr.ifr_ifru.ifru_addr, sock_addr, sock_addr->sa_len);
218 int rv = ioctl(ioctl_socket_, SIOCGIFAFLAG_IN6, &ifr);
219 if (rv >= 0) {
220 *native_attributes = ifr.ifr_ifru.ifru_flags;
221 } else {
222 LOG(LS_ERROR) << "ioctl returns " << errno;
223 }
224 return (rv >= 0);
225 }
226
227 // Converts native IPv6 address attributes to net IPv6 address attributes. If
228 // it returns false, the IP address isn't suitable for one-to-one communications
229 // applications and should be ignored.
ConvertNativeToIPAttributes(int native_attributes,int * net_attributes)230 bool ConvertNativeToIPAttributes(int native_attributes, int* net_attributes) {
231 // For MacOSX, we disallow addresses with attributes IN6_IFF_ANYCASE,
232 // IN6_IFF_DUPLICATED, IN6_IFF_TENTATIVE, and IN6_IFF_DETACHED as these are
233 // still progressing through duplicated address detection (DAD) or are not
234 // suitable for one-to-one communication applications.
235 if (native_attributes & (IN6_IFF_ANYCAST | IN6_IFF_DUPLICATED |
236 IN6_IFF_TENTATIVE | IN6_IFF_DETACHED)) {
237 return false;
238 }
239
240 if (native_attributes & IN6_IFF_TEMPORARY) {
241 *net_attributes |= IPV6_ADDRESS_FLAG_TEMPORARY;
242 }
243
244 if (native_attributes & IN6_IFF_DEPRECATED) {
245 *net_attributes |= IPV6_ADDRESS_FLAG_DEPRECATED;
246 }
247
248 return true;
249 }
250
251 class MacIfAddrsConverter : public IfAddrsConverter {
252 public:
MacIfAddrsConverter()253 MacIfAddrsConverter() : ip_attribute_getter_(new IPv6AttributesGetter()) {}
~MacIfAddrsConverter()254 ~MacIfAddrsConverter() override {}
255
ConvertNativeAttributesToIPAttributes(const struct ifaddrs * interface,int * ip_attributes)256 bool ConvertNativeAttributesToIPAttributes(const struct ifaddrs* interface,
257 int* ip_attributes) override {
258 int native_attributes;
259 if (!ip_attribute_getter_->GetIPAttributes(
260 interface->ifa_name, interface->ifa_addr, &native_attributes)) {
261 return false;
262 }
263
264 if (!ConvertNativeToIPAttributes(native_attributes, ip_attributes)) {
265 return false;
266 }
267
268 return true;
269 }
270
271 private:
272 rtc::scoped_ptr<IPv6AttributesGetter> ip_attribute_getter_;
273 };
274
275 } // namespace
276
CreateIfAddrsConverter()277 IfAddrsConverter* CreateIfAddrsConverter() {
278 return new MacIfAddrsConverter();
279 }
280
281 } // namespace rtc
282