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-rw-r--r--common/Makefile.am2
-rw-r--r--common/socket.c309
2 files changed, 309 insertions, 2 deletions
diff --git a/common/Makefile.am b/common/Makefile.am
index ca8180c..8d0e889 100644
--- a/common/Makefile.am
+++ b/common/Makefile.am
@@ -12,5 +12,5 @@ libinternalcommon_la_SOURCES = \
collection.h
if WIN32
-libinternalcommon_la_LIBADD += -lws2_32
+libinternalcommon_la_LIBADD += -lws2_32 -lIphlpapi
endif
diff --git a/common/socket.c b/common/socket.c
index 47c0903..bcccbae 100644
--- a/common/socket.c
+++ b/common/socket.c
@@ -34,7 +34,16 @@
#include <winsock2.h>
#include <ws2tcpip.h>
#include <windows.h>
+#ifndef HAVE_GETIFADDRS
+#include <iphlpapi.h>
+#endif
static int wsa_init = 0;
+#ifndef IFF_RUNNING
+#define IFF_RUNNING IFF_UP
+#endif
+#ifndef AI_NUMERICSERV
+#define AI_NUMERICSERV 0
+#endif
#else
#include <sys/socket.h>
#include <sys/un.h>
@@ -377,10 +386,308 @@ static uint32_t _in6_addr_scope(struct in6_addr* addr)
return scope;
}
+#ifndef HAVE_GETIFADDRS
+#ifdef WIN32
+
+struct ifaddrs {
+ struct ifaddrs *ifa_next; /* Next item in list */
+ char *ifa_name; /* Name of interface */
+ unsigned int ifa_flags; /* Flags from SIOCGIFFLAGS */
+ struct sockaddr *ifa_addr; /* Address of interface */
+ struct sockaddr *ifa_netmask; /* Netmask of interface */
+ union {
+ struct sockaddr *ifu_broadaddr; /* Broadcast address of interface */
+ struct sockaddr *ifu_dstaddr; /* Point-to-point destination address */
+ } ifa_ifu;
+#define ifa_broadaddr ifa_ifu.ifu_broadaddr
+#define ifa_dstaddr ifa_ifu.ifu_dstaddr
+ void *ifa_data; /* Address-specific data */
+};
+
+#define WORKING_BUFFER_SIZE 15000
+#define MAX_TRIES 3
+
+static void freeifaddrs(struct ifaddrs *ifa)
+{
+ if (!ifa) {
+ return;
+ }
+ free(ifa->ifa_name);
+ free(ifa->ifa_addr);
+ free(ifa->ifa_netmask);
+ free(ifa->ifa_dstaddr);
+ freeifaddrs(ifa->ifa_next);
+ free(ifa);
+}
+
+/*
+ * getifaddrs() reference implementation for win32.
+ * Heavily based on openpgm's implementation found here:
+ * https://github.com/steve-o/openpgm/blob/master/openpgm/pgm/getifaddrs.c
+ */
+static int getifaddrs(struct ifaddrs** ifap)
+{
+ struct ifaddrs* ifa = NULL;
+
+ DWORD dwRetVal = 0;
+
+ PIP_ADAPTER_ADDRESSES pAddresses = NULL;
+ ULONG outBufLen = 0;
+ ULONG Iterations = 0;
+
+ ULONG flags = GAA_FLAG_INCLUDE_PREFIX |
+ GAA_FLAG_SKIP_ANYCAST |
+ GAA_FLAG_SKIP_DNS_SERVER |
+ GAA_FLAG_SKIP_FRIENDLY_NAME |
+ GAA_FLAG_SKIP_MULTICAST;
+
+ PIP_ADAPTER_ADDRESSES adapter = NULL;
+
+ if (!ifap) {
+ errno = EINVAL;
+ return -1;
+ }
+ *ifap = NULL;
+
+ outBufLen = WORKING_BUFFER_SIZE;
+ do {
+ pAddresses = (IP_ADAPTER_ADDRESSES*)malloc(outBufLen);
+ if (pAddresses == NULL) {
+ printf("Memory allocation failed for IP_ADAPTER_ADDRESSES struct\n");
+ return -1;
+ }
+ dwRetVal = GetAdaptersAddresses(AF_UNSPEC, flags, NULL, pAddresses, &outBufLen);
+ if (dwRetVal == ERROR_BUFFER_OVERFLOW) {
+ free(pAddresses);
+ pAddresses = NULL;
+ } else {
+ break;
+ }
+ Iterations++;
+ } while ((dwRetVal == ERROR_BUFFER_OVERFLOW) && (Iterations < MAX_TRIES));
+
+ if (dwRetVal != NO_ERROR) {
+ free(pAddresses);
+ return -1;
+ }
+
+ for (adapter = pAddresses; adapter; adapter = adapter->Next) {
+ int unicastIndex = 0;
+ for (IP_ADAPTER_UNICAST_ADDRESS *unicast = adapter->FirstUnicastAddress; unicast; unicast = unicast->Next, ++unicastIndex) {
+ /* ensure IP adapter */
+ if (AF_INET != unicast->Address.lpSockaddr->sa_family && AF_INET6 != unicast->Address.lpSockaddr->sa_family) {
+ continue;
+ }
+
+ if (!ifa) {
+ ifa = malloc(sizeof(struct ifaddrs));
+ if (!ifa) {
+ errno = ENOMEM;
+ free(pAddresses);
+ return -1;
+ }
+ *ifap = ifa;
+ ifa->ifa_next = NULL;
+ } else {
+ struct ifaddrs* ifanew = malloc(sizeof(struct ifaddrs));
+ if (!ifanew) {
+ freeifaddrs(*ifap);
+ free(pAddresses);
+ errno = ENOMEM;
+ return -1;
+ }
+ ifa->ifa_next = ifanew;
+ ifa = ifanew;
+ ifa->ifa_next = NULL;
+ }
+
+ /* name */
+ ifa->ifa_name = strdup(adapter->AdapterName);
+
+ /* flags */
+ ifa->ifa_flags = 0;
+ if (IfOperStatusUp == adapter->OperStatus)
+ ifa->ifa_flags |= IFF_UP;
+ if (IF_TYPE_SOFTWARE_LOOPBACK == adapter->IfType)
+ ifa->ifa_flags |= IFF_LOOPBACK;
+ if (!(adapter->Flags & IP_ADAPTER_NO_MULTICAST))
+ ifa->ifa_flags |= IFF_MULTICAST;
+
+ /* address */
+ ifa->ifa_addr = (struct sockaddr*)malloc(sizeof(struct sockaddr_storage));
+ memcpy(ifa->ifa_addr, unicast->Address.lpSockaddr, unicast->Address.iSockaddrLength);
+
+ /* netmask */
+ ifa->ifa_netmask = (struct sockaddr*)malloc(sizeof(struct sockaddr_storage));
+ memset(ifa->ifa_netmask, 0, sizeof(struct sockaddr_storage));
+
+/* pre-Vista must hunt for matching prefix in linked list, otherwise use
+ * OnLinkPrefixLength from IP_ADAPTER_UNICAST_ADDRESS structure.
+ * FirstPrefix requires Windows XP SP1, from SP1 to pre-Vista provides a
+ * single adapter prefix for each IP address. Vista and later provides
+ * host IP address prefix, subnet IP address, and subnet broadcast IP
+ * address. In addition there is a multicast and broadcast address prefix.
+ */
+ ULONG prefixLength = 0;
+
+#if defined( _WIN32 ) && ( _WIN32_WINNT >= 0x0600 )
+/* For a unicast IPv4 address, any value greater than 32 is an illegal
+ * value. For a unicast IPv6 address, any value greater than 128 is an
+ * illegal value. A value of 255 is commonly used to represent an illegal
+ * value.
+ *
+ * Windows 7 SP1 returns 64 for Teredo links which is incorrect.
+ */
+
+#define IN6_IS_ADDR_TEREDO(addr) \
+ (((const uint32_t *)(addr))[0] == ntohl (0x20010000))
+
+ if (AF_INET6 == unicast->Address.lpSockaddr->sa_family &&
+/* TunnelType only applies to one interface on the adapter and no
+ * convenient method is provided to determine which.
+ */
+ TUNNEL_TYPE_TEREDO == adapter->TunnelType &&
+/* Test the interface with the known Teredo network prefix.
+ */
+ IN6_IS_ADDR_TEREDO( &((struct sockaddr_in6*)(unicast->Address.lpSockaddr))->sin6_addr) &&
+/* Test that this version is actually wrong, subsequent releases from Microsoft
+ * may resolve the issue.
+ */
+ 32 != unicast->OnLinkPrefixLength)
+ {
+ prefixLength = 32;
+ }
+ else
+ prefixLength = unicast->OnLinkPrefixLength;
+#else
+/* The order of linked IP_ADAPTER_UNICAST_ADDRESS structures pointed to by
+ * the FirstUnicastAddress member does not have any relationship with the
+ * order of linked IP_ADAPTER_PREFIX structures pointed to by the FirstPrefix
+ * member.
+ *
+ * Example enumeration:
+ * [ no subnet ]
+ * ::1/128 - address
+ * ff00::%1/8 - multicast (no IPv6 broadcast)
+ * 127.0.0.0/8 - subnet
+ * 127.0.0.1/32 - address
+ * 127.255.255.255/32 - subnet broadcast
+ * 224.0.0.0/4 - multicast
+ * 255.255.255.255/32 - broadcast
+ *
+ * Which differs from most adapters listing three IPv6:
+ * fe80::%10/64 - subnet
+ * fe80::51e9:5fe5:4202:325a%10/128 - address
+ * ff00::%10/8 - multicast
+ *
+ * !IfOperStatusUp IPv4 addresses are skipped:
+ * fe80::%13/64 - subnet
+ * fe80::d530:946d:e8df:8c91%13/128 - address
+ * ff00::%13/8 - multicast
+ * [ no subnet ]
+ * [ no address ]
+ * 224.0.0.0/4 - multicast
+ * 255.255.255.255/32 - broadcast
+ *
+ * On PTP links no multicast or broadcast addresses are returned:
+ * [ no subnet ]
+ * fe80::5efe:10.203.9.30/128 - address
+ * [ no multicast ]
+ * [ no multicast ]
+ * [ no broadcast ]
+ *
+ * Active primary IPv6 interfaces are a bit overloaded:
+ * ::/0 - default route
+ * 2001::/32 - global subnet
+ * 2001:0:4137:9e76:2443:d6:ba87:1a2a/128 - global address
+ * fe80::/64 - link-local subnet
+ * fe80::2443:d6:ba87:1a2a/128 - link-local address
+ * ff00::/8 - multicast
+ */
+
+#define IN_LINKLOCAL(a) ((((uint32_t) (a)) & 0xaffff0000) == 0xa9fe0000)
+
+ for (IP_ADAPTER_PREFIX *prefix = adapter->FirstPrefix; prefix; prefix = prefix->Next) {
+ LPSOCKADDR lpSockaddr = prefix->Address.lpSockaddr;
+ if (lpSockaddr->sa_family != unicast->Address.lpSockaddr->sa_family)
+ continue;
+/* special cases */
+/* RFC2863: IPv4 interface not up */
+ if (AF_INET == lpSockaddr->sa_family && adapter->OperStatus != IfOperStatusUp) {
+/* RFC3927: link-local IPv4 always has 16-bit CIDR */
+ if (IN_LINKLOCAL( ntohl (((struct sockaddr_in*)(unicast->Address.lpSockaddr))->sin_addr.s_addr))) {
+ prefixLength = 16;
+ }
+ break;
+ }
+/* default IPv6 route */
+ if (AF_INET6 == lpSockaddr->sa_family && 0 == prefix->PrefixLength && IN6_IS_ADDR_UNSPECIFIED( &((struct sockaddr_in6*)(lpSockaddr))->sin6_addr)) {
+ continue;
+ }
+/* Assume unicast address for first prefix of operational adapter */
+ if (AF_INET == lpSockaddr->sa_family)
+ if (IN_MULTICAST( ntohl (((struct sockaddr_in*)(lpSockaddr))->sin_addr.s_addr))) {
+ fprintf(stderr, "FATAL: first prefix is non a unicast address\n");
+ break;
+ }
+ if (AF_INET6 == lpSockaddr->sa_family)
+ if (IN6_IS_ADDR_MULTICAST( &((struct sockaddr_in6*)(lpSockaddr))->sin6_addr)) {
+ fprintf(stderr, "FATAL: first prefix is not a unicast address\n");
+ break;
+ }
+/* Assume subnet or host IP address for XP backward compatibility */
+
+ prefixLength = prefix->PrefixLength;
+ break;
+ }
+#endif /* defined( _WIN32 ) && ( _WIN32_WINNT >= 0x0600 ) */
+
+/* map prefix to netmask */
+ ifa->ifa_netmask->sa_family = unicast->Address.lpSockaddr->sa_family;
+ switch (unicast->Address.lpSockaddr->sa_family) {
+ case AF_INET:
+ if (0 == prefixLength || prefixLength > 32) {
+ prefixLength = 32;
+ }
+#if defined( _WIN32) && ( _WIN32_WINNT >= 0x0600 )
+/* Added in Vista, but no IPv6 equivalent. */
+ {
+ ULONG Mask;
+ ConvertLengthToIpv4Mask (prefixLength, &Mask);
+ ((struct sockaddr_in*)ifa->ifa_netmask)->sin_addr.s_addr = Mask; /* network order */
+ }
+#else
+/* NB: left-shift of full bit-width is undefined in C standard. */
+ ((struct sockaddr_in*)ifa->ifa_netmask)->sin_addr.s_addr = htonl( 0xffffffffU << ( 32 - prefixLength ) );
+#endif
+ break;
+
+ case AF_INET6:
+ if (0 == prefixLength || prefixLength > 128) {
+ prefixLength = 128;
+ }
+ for (LONG i = prefixLength, j = 0; i > 0; i -= 8, ++j) {
+ ((struct sockaddr_in6*)ifa->ifa_netmask)->sin6_addr.s6_addr[ j ] = i >= 8 ? 0xff : (ULONG)(( 0xffU << ( 8 - i ) ) & 0xffU );
+ }
+ break;
+ default:
+ break;
+ }
+ }
+ }
+ free(pAddresses);
+
+ return 0;
+}
+#else
+#error No reference implementation for getifaddrs available for this platform.
+#endif
+#endif
+
static int32_t _sockaddr_in6_scope_id(struct sockaddr_in6* addr)
{
int32_t res = -1;
- struct ifaddrs *ifaddr, *ifa;
+ struct ifaddrs *ifaddr = NULL, *ifa = NULL;
uint32_t addr_scope;
/* get scope for requested address */
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