283 lines
10 KiB
C++
283 lines
10 KiB
C++
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/*
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* Copyright 2015 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <net/if.h>
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#include <sys/ioctl.h>
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#include <unistd.h>
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#include <memory>
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#include "rtc_base/checks.h"
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#include "rtc_base/ifaddrs_converter.h"
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#include "rtc_base/logging.h"
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#if !defined(WEBRTC_IOS)
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#include <net/if_media.h>
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#include <netinet/in_var.h>
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#else // WEBRTC_IOS
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#define SCOPE6_ID_MAX 16
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struct in6_addrlifetime {
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time_t ia6t_expire; /* valid lifetime expiration time */
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time_t ia6t_preferred; /* preferred lifetime expiration time */
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u_int32_t ia6t_vltime; /* valid lifetime */
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u_int32_t ia6t_pltime; /* prefix lifetime */
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};
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struct in6_ifstat {
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u_quad_t ifs6_in_receive; /* # of total input datagram */
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u_quad_t ifs6_in_hdrerr; /* # of datagrams with invalid hdr */
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u_quad_t ifs6_in_toobig; /* # of datagrams exceeded MTU */
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u_quad_t ifs6_in_noroute; /* # of datagrams with no route */
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u_quad_t ifs6_in_addrerr; /* # of datagrams with invalid dst */
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u_quad_t ifs6_in_protounknown; /* # of datagrams with unknown proto */
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/* NOTE: increment on final dst if */
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u_quad_t ifs6_in_truncated; /* # of truncated datagrams */
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u_quad_t ifs6_in_discard; /* # of discarded datagrams */
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/* NOTE: fragment timeout is not here */
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u_quad_t ifs6_in_deliver; /* # of datagrams delivered to ULP */
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/* NOTE: increment on final dst if */
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u_quad_t ifs6_out_forward; /* # of datagrams forwarded */
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/* NOTE: increment on outgoing if */
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u_quad_t ifs6_out_request; /* # of outgoing datagrams from ULP */
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/* NOTE: does not include forwrads */
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u_quad_t ifs6_out_discard; /* # of discarded datagrams */
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u_quad_t ifs6_out_fragok; /* # of datagrams fragmented */
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u_quad_t ifs6_out_fragfail; /* # of datagrams failed on fragment */
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u_quad_t ifs6_out_fragcreat; /* # of fragment datagrams */
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/* NOTE: this is # after fragment */
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u_quad_t ifs6_reass_reqd; /* # of incoming fragmented packets */
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/* NOTE: increment on final dst if */
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u_quad_t ifs6_reass_ok; /* # of reassembled packets */
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/* NOTE: this is # after reass */
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/* NOTE: increment on final dst if */
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u_quad_t ifs6_reass_fail; /* # of reass failures */
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/* NOTE: may not be packet count */
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/* NOTE: increment on final dst if */
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u_quad_t ifs6_in_mcast; /* # of inbound multicast datagrams */
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u_quad_t ifs6_out_mcast; /* # of outbound multicast datagrams */
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};
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struct icmp6_ifstat {
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/*
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* Input statistics
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*/
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/* ipv6IfIcmpInMsgs, total # of input messages */
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u_quad_t ifs6_in_msg;
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/* ipv6IfIcmpInErrors, # of input error messages */
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u_quad_t ifs6_in_error;
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/* ipv6IfIcmpInDestUnreachs, # of input dest unreach errors */
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u_quad_t ifs6_in_dstunreach;
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/* ipv6IfIcmpInAdminProhibs, # of input admin. prohibited errs */
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u_quad_t ifs6_in_adminprohib;
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/* ipv6IfIcmpInTimeExcds, # of input time exceeded errors */
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u_quad_t ifs6_in_timeexceed;
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/* ipv6IfIcmpInParmProblems, # of input parameter problem errors */
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u_quad_t ifs6_in_paramprob;
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/* ipv6IfIcmpInPktTooBigs, # of input packet too big errors */
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u_quad_t ifs6_in_pkttoobig;
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/* ipv6IfIcmpInEchos, # of input echo requests */
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u_quad_t ifs6_in_echo;
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/* ipv6IfIcmpInEchoReplies, # of input echo replies */
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u_quad_t ifs6_in_echoreply;
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/* ipv6IfIcmpInRouterSolicits, # of input router solicitations */
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u_quad_t ifs6_in_routersolicit;
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/* ipv6IfIcmpInRouterAdvertisements, # of input router advertisements */
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u_quad_t ifs6_in_routeradvert;
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/* ipv6IfIcmpInNeighborSolicits, # of input neighbor solicitations */
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u_quad_t ifs6_in_neighborsolicit;
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/* ipv6IfIcmpInNeighborAdvertisements, # of input neighbor advs. */
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u_quad_t ifs6_in_neighboradvert;
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/* ipv6IfIcmpInRedirects, # of input redirects */
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u_quad_t ifs6_in_redirect;
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/* ipv6IfIcmpInGroupMembQueries, # of input MLD queries */
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u_quad_t ifs6_in_mldquery;
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/* ipv6IfIcmpInGroupMembResponses, # of input MLD reports */
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u_quad_t ifs6_in_mldreport;
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/* ipv6IfIcmpInGroupMembReductions, # of input MLD done */
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u_quad_t ifs6_in_mlddone;
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/*
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* Output statistics. We should solve unresolved routing problem...
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*/
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/* ipv6IfIcmpOutMsgs, total # of output messages */
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u_quad_t ifs6_out_msg;
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/* ipv6IfIcmpOutErrors, # of output error messages */
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u_quad_t ifs6_out_error;
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/* ipv6IfIcmpOutDestUnreachs, # of output dest unreach errors */
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u_quad_t ifs6_out_dstunreach;
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/* ipv6IfIcmpOutAdminProhibs, # of output admin. prohibited errs */
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u_quad_t ifs6_out_adminprohib;
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/* ipv6IfIcmpOutTimeExcds, # of output time exceeded errors */
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u_quad_t ifs6_out_timeexceed;
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/* ipv6IfIcmpOutParmProblems, # of output parameter problem errors */
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u_quad_t ifs6_out_paramprob;
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/* ipv6IfIcmpOutPktTooBigs, # of output packet too big errors */
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u_quad_t ifs6_out_pkttoobig;
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/* ipv6IfIcmpOutEchos, # of output echo requests */
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u_quad_t ifs6_out_echo;
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/* ipv6IfIcmpOutEchoReplies, # of output echo replies */
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u_quad_t ifs6_out_echoreply;
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/* ipv6IfIcmpOutRouterSolicits, # of output router solicitations */
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u_quad_t ifs6_out_routersolicit;
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/* ipv6IfIcmpOutRouterAdvertisements, # of output router advs. */
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u_quad_t ifs6_out_routeradvert;
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/* ipv6IfIcmpOutNeighborSolicits, # of output neighbor solicitations */
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u_quad_t ifs6_out_neighborsolicit;
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/* ipv6IfIcmpOutNeighborAdvertisements, # of output neighbor advs. */
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u_quad_t ifs6_out_neighboradvert;
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/* ipv6IfIcmpOutRedirects, # of output redirects */
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u_quad_t ifs6_out_redirect;
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/* ipv6IfIcmpOutGroupMembQueries, # of output MLD queries */
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u_quad_t ifs6_out_mldquery;
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/* ipv6IfIcmpOutGroupMembResponses, # of output MLD reports */
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u_quad_t ifs6_out_mldreport;
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/* ipv6IfIcmpOutGroupMembReductions, # of output MLD done */
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u_quad_t ifs6_out_mlddone;
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};
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struct in6_ifreq {
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char ifr_name[IFNAMSIZ];
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union {
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struct sockaddr_in6 ifru_addr;
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struct sockaddr_in6 ifru_dstaddr;
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int ifru_flags;
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int ifru_flags6;
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int ifru_metric;
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int ifru_intval;
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caddr_t ifru_data;
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struct in6_addrlifetime ifru_lifetime;
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struct in6_ifstat ifru_stat;
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struct icmp6_ifstat ifru_icmp6stat;
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u_int32_t ifru_scope_id[SCOPE6_ID_MAX];
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} ifr_ifru;
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};
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#define SIOCGIFAFLAG_IN6 _IOWR('i', 73, struct in6_ifreq)
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#define IN6_IFF_ANYCAST 0x0001 /* anycast address */
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#define IN6_IFF_TENTATIVE 0x0002 /* tentative address */
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#define IN6_IFF_DUPLICATED 0x0004 /* DAD detected duplicate */
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#define IN6_IFF_DETACHED 0x0008 /* may be detached from the link */
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#define IN6_IFF_DEPRECATED 0x0010 /* deprecated address */
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#define IN6_IFF_TEMPORARY 0x0080 /* temporary (anonymous) address. */
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#endif // WEBRTC_IOS
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namespace rtc {
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namespace {
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class IPv6AttributesGetter {
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public:
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IPv6AttributesGetter();
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virtual ~IPv6AttributesGetter();
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bool IsInitialized() const;
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bool GetIPAttributes(const char* ifname,
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const sockaddr* sock_addr,
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int* native_attributes);
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private:
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// on MAC or IOS, we have to use ioctl with a socket to query an IPv6
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// interface's attribute.
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int ioctl_socket_;
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};
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IPv6AttributesGetter::IPv6AttributesGetter()
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: ioctl_socket_(
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socket(AF_INET6, SOCK_DGRAM, 0 /* unspecified protocol */)) {
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RTC_DCHECK_GE(ioctl_socket_, 0);
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}
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bool IPv6AttributesGetter::IsInitialized() const {
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return ioctl_socket_ >= 0;
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}
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IPv6AttributesGetter::~IPv6AttributesGetter() {
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if (!IsInitialized()) {
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return;
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}
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close(ioctl_socket_);
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}
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bool IPv6AttributesGetter::GetIPAttributes(const char* ifname,
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const sockaddr* sock_addr,
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int* native_attributes) {
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if (!IsInitialized()) {
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return false;
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}
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struct in6_ifreq ifr = {};
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strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
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memcpy(&ifr.ifr_ifru.ifru_addr, sock_addr, sock_addr->sa_len);
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int rv = ioctl(ioctl_socket_, SIOCGIFAFLAG_IN6, &ifr);
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if (rv >= 0) {
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*native_attributes = ifr.ifr_ifru.ifru_flags;
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} else {
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RTC_LOG(LS_ERROR) << "ioctl returns " << errno;
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}
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return (rv >= 0);
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}
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// Converts native IPv6 address attributes to net IPv6 address attributes. If
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// it returns false, the IP address isn't suitable for one-to-one communications
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// applications and should be ignored.
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bool ConvertNativeToIPAttributes(int native_attributes, int* net_attributes) {
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// For MacOSX, we disallow addresses with attributes IN6_IFF_ANYCASE,
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// IN6_IFF_DUPLICATED, IN6_IFF_TENTATIVE, and IN6_IFF_DETACHED as these are
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// still progressing through duplicated address detection (DAD) or are not
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// suitable for one-to-one communication applications.
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if (native_attributes & (IN6_IFF_ANYCAST | IN6_IFF_DUPLICATED |
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IN6_IFF_TENTATIVE | IN6_IFF_DETACHED)) {
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return false;
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}
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if (native_attributes & IN6_IFF_TEMPORARY) {
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*net_attributes |= IPV6_ADDRESS_FLAG_TEMPORARY;
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}
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if (native_attributes & IN6_IFF_DEPRECATED) {
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*net_attributes |= IPV6_ADDRESS_FLAG_DEPRECATED;
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}
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return true;
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}
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class MacIfAddrsConverter : public IfAddrsConverter {
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public:
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MacIfAddrsConverter() : ip_attribute_getter_(new IPv6AttributesGetter()) {}
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~MacIfAddrsConverter() override {}
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bool ConvertNativeAttributesToIPAttributes(const struct ifaddrs* interface,
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int* ip_attributes) override {
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int native_attributes;
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if (!ip_attribute_getter_->GetIPAttributes(
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interface->ifa_name, interface->ifa_addr, &native_attributes)) {
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return false;
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}
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if (!ConvertNativeToIPAttributes(native_attributes, ip_attributes)) {
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return false;
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}
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return true;
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}
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private:
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std::unique_ptr<IPv6AttributesGetter> ip_attribute_getter_;
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};
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} // namespace
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IfAddrsConverter* CreateIfAddrsConverter() {
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return new MacIfAddrsConverter();
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}
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} // namespace rtc
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