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