add Linux AF_NETLINK getifaddrs from Hideaki YOSHIFUJI of the Usagi

project git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@11364 ec53bebd-3082-4978-b11e-865c3cabbd6b
2002-09-04 04:26:27 +00:00
parent 153921a13c
commit 6aa0fddea7
1 changed files with 775 additions and 1 deletions
--- a/lib/roken/getifaddrs.c
+++ b/lib/roken/getifaddrs.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000 - 2001 Kungliga Tekniska H<>gskolan
+ * Copyright (c) 2000 - 2002 Kungliga Tekniska H<>gskolan
 * (Royal Institute of Technology, Stockholm, Sweden).
 * All rights reserved.
 * 
@@ -56,6 +56,778 @@ struct mbuf;

 #include <ifaddrs.h>

+#ifdef AF_NETLINK
+
+/*
+ * The linux - AF_NETLINK version of getifaddrs - from Usagi.
+ * Linux does not return v6 addresses from SIOCGIFCONF.
+ */
+
+/* $USAGI: ifaddrs.c,v 1.18 2002/03/06 01:50:46 yoshfuji Exp $ */
+
+/**************************************************************************
+ * ifaddrs.c
+ * Copyright (C)2000 Hideaki YOSHIFUJI, All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the author nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "config.h"
+
+#include <string.h>
+#include <time.h>
+#include <malloc.h>
+#include <errno.h>
+#include <unistd.h>
+
+#include <sys/socket.h>
+#include <asm/types.h>
+#include <linux/netlink.h>
+#include <linux/rtnetlink.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netpacket/packet.h>
+#include <net/ethernet.h>     /* the L2 protocols */
+#include <sys/uio.h>
+#include <net/if.h>
+#include <net/if_arp.h>
+#include <ifaddrs.h>
+#include <netinet/in.h>
+
+#define __set_errno(e) (errno = (e))
+#define __close(fd) (close(fd))
+#undef ifa_broadaddr
+#define ifa_broadaddr ifa_dstaddr
+#define IFA_NETMASK
+
+/* ====================================================================== */
+struct nlmsg_list{
+    struct nlmsg_list *nlm_next;
+    struct nlmsghdr *nlh;
+    int size;
+    time_t seq;
+};
+
+struct rtmaddr_ifamap {
+  void *address;
+  void *local;
+#ifdef IFA_NETMASK
+  void *netmask;
+#endif
+  void *broadcast;
+#ifdef HAVE_IFADDRS_IFA_ANYCAST
+  void *anycast;
+#endif
+  int address_len;
+  int local_len;
+#ifdef IFA_NETMASK
+  int netmask_len;
+#endif
+  int broadcast_len;
+#ifdef HAVE_IFADDRS_IFA_ANYCAST
+  int anycast_len;
+#endif
+};
+
+/* ====================================================================== */
+static size_t
+ifa_sa_len(sa_family_t family, int len)
+{
+  size_t size;
+  switch(family){
+  case AF_INET:
+    size = sizeof(struct sockaddr_in);
+    break;
+  case AF_INET6:
+    size = sizeof(struct sockaddr_in6);
+    break;
+  case AF_PACKET:
+    size = (size_t)(((struct sockaddr_ll *)NULL)->sll_addr) + len;
+    if (size < sizeof(struct sockaddr_ll))
+      size = sizeof(struct sockaddr_ll);
+    break;
+  default:
+    size = (size_t)(((struct sockaddr *)NULL)->sa_data) + len;
+    if (size < sizeof(struct sockaddr))
+      size = sizeof(struct sockaddr);
+  }
+  return size;
+}
+
+static void 
+ifa_make_sockaddr(sa_family_t family, 
+		  struct sockaddr *sa, 
+		  void *p, size_t len,
+		  uint32_t scope, uint32_t scopeid)
+{
+  if (sa == NULL) return;
+  switch(family){
+  case AF_INET:
+    memcpy(&((struct sockaddr_in*)sa)->sin_addr, (char *)p, len);
+    break;
+  case AF_INET6:
+    memcpy(&((struct sockaddr_in6*)sa)->sin6_addr, (char *)p, len);
+    if (IN6_IS_ADDR_LINKLOCAL(p) ||
+	IN6_IS_ADDR_MC_LINKLOCAL(p)){
+      ((struct sockaddr_in6*)sa)->sin6_scope_id = scopeid;
+    }
+    break;
+  case AF_PACKET:
+    memcpy(((struct sockaddr_ll*)sa)->sll_addr, (char *)p, len);
+    ((struct sockaddr_ll*)sa)->sll_halen = len;
+    break;
+  default:
+    memcpy(sa->sa_data, p, len);	/*XXX*/
+    break;
+  }
+  sa->sa_family = family;
+#ifdef HAVE_SOCKADDR_SA_LEN
+  sa->sa_len = ifa_sa_len(family, len);
+#endif
+}
+
+static struct sockaddr *
+ifa_make_sockaddr_mask(sa_family_t family, 
+		       struct sockaddr *sa, 
+		       uint32_t prefixlen)
+{
+  int i;
+  char *p = NULL, c;
+  uint32_t max_prefixlen = 0;
+
+  if (sa == NULL) return NULL;
+  switch(family){
+  case AF_INET:
+    memset(&((struct sockaddr_in*)sa)->sin_addr, 0, sizeof(((struct sockaddr_in*)sa)->sin_addr));
+    p = (char *)&((struct sockaddr_in*)sa)->sin_addr;
+    max_prefixlen = 32;
+    break;
+  case AF_INET6:
+    memset(&((struct sockaddr_in6*)sa)->sin6_addr, 0, sizeof(((struct sockaddr_in6*)sa)->sin6_addr));
+    p = (char *)&((struct sockaddr_in6*)sa)->sin6_addr;
+#if 0	/* XXX: fill scope-id? */
+    if (IN6_IS_ADDR_LINKLOCAL(p) ||
+	IN6_IS_ADDR_MC_LINKLOCAL(p)){
+      ((struct sockaddr_in6*)sa)->sin6_scope_id = scopeid;
+    }
+#endif
+    max_prefixlen = 128;
+    break;
+  default:
+    return NULL;
+  }
+  sa->sa_family = family;
+#ifdef HAVE_SOCKADDR_SA_LEN
+  sa->sa_len = ifa_sa_len(family, len);
+#endif
+  if (p){
+    if (prefixlen > max_prefixlen)
+      prefixlen = max_prefixlen;
+    for (i=0; i<(prefixlen / 8); i++)
+      *p++ = 0xff;
+    c = 0xff;
+    c <<= (8 - (prefixlen % 8));
+    *p = c;
+  }
+  return sa;
+}
+
+/* ====================================================================== */
+static int 
+nl_sendreq(int sd, int request, int flags, int *seq)
+{
+  char reqbuf[NLMSG_ALIGN(sizeof(struct nlmsghdr)) +
+	      NLMSG_ALIGN(sizeof(struct rtgenmsg))];
+  struct sockaddr_nl nladdr;
+  struct nlmsghdr *req_hdr;
+  struct rtgenmsg *req_msg;
+  time_t t = time(NULL);
+
+  if (seq) *seq = t;
+  memset(&reqbuf, 0, sizeof(reqbuf));
+  req_hdr = (struct nlmsghdr *)reqbuf;
+  req_msg = (struct rtgenmsg *)NLMSG_DATA(req_hdr);
+  req_hdr->nlmsg_len = NLMSG_LENGTH(sizeof(*req_msg));
+  req_hdr->nlmsg_type = request;
+  req_hdr->nlmsg_flags = flags | NLM_F_REQUEST;
+  req_hdr->nlmsg_pid = 0;
+  req_hdr->nlmsg_seq = t;
+  req_msg->rtgen_family = AF_UNSPEC;
+  memset(&nladdr, 0, sizeof(nladdr));
+  nladdr.nl_family = AF_NETLINK;
+  return (sendto(sd, (void *)req_hdr, req_hdr->nlmsg_len, 0,
+		 (struct sockaddr *)&nladdr, sizeof(nladdr)));
+}
+
+static int 
+nl_recvmsg(int sd, int request, int seq, 
+	   void *buf, size_t buflen, 
+	   int *flags)
+{
+  struct msghdr msg;
+  struct iovec iov = { buf, buflen };
+  struct sockaddr_nl nladdr;
+  int read_len;
+
+  for (;;){
+    msg.msg_name = (void *)&nladdr;
+    msg.msg_namelen = sizeof(nladdr);
+    msg.msg_iov = &iov;
+    msg.msg_iovlen = 1;
+    msg.msg_control = NULL;
+    msg.msg_controllen = 0;
+    msg.msg_flags = 0;
+    read_len = recvmsg(sd, &msg, 0);
+    if ((read_len < 0 && errno == EINTR) || (msg.msg_flags & MSG_TRUNC))
+      continue;
+    if (flags) *flags = msg.msg_flags;
+    break;
+  }
+  return read_len;
+}
+
+static int 
+nl_getmsg(int sd, int request, int seq, 
+	  struct nlmsghdr **nlhp,
+	  int *done)
+{
+  struct nlmsghdr *nh;
+  size_t bufsize = 65536, lastbufsize = 0;
+  void *buff = NULL;
+  int result = 0, read_size;
+  int msg_flags;
+  pid_t pid = getpid();
+  for (;;){
+    void *newbuff = realloc(buff, bufsize);
+    if (newbuff == NULL || bufsize < lastbufsize) {
+      result = -1;
+      break;
+    }
+    buff = newbuff;
+    result = read_size = nl_recvmsg(sd, request, seq, buff, bufsize, &msg_flags);
+    if (read_size < 0 || (msg_flags & MSG_TRUNC)){
+      lastbufsize = bufsize;
+      bufsize *= 2;
+      continue;
+    }
+    if (read_size == 0) break;
+    nh = (struct nlmsghdr *)buff;
+    for (nh = (struct nlmsghdr *)buff;
+	 NLMSG_OK(nh, read_size);
+	 nh = (struct nlmsghdr *)NLMSG_NEXT(nh, read_size)){
+      if (nh->nlmsg_pid != pid ||
+	  nh->nlmsg_seq != seq)
+	continue;
+      if (nh->nlmsg_type == NLMSG_DONE){
+	(*done)++;
+	break; /* ok */
+      }
+      if (nh->nlmsg_type == NLMSG_ERROR){
+	struct nlmsgerr *nlerr = (struct nlmsgerr *)NLMSG_DATA(nh);
+	result = -1;
+	if (nh->nlmsg_len < NLMSG_LENGTH(sizeof(struct nlmsgerr)))
+	  __set_errno(EIO);
+	else
+	  __set_errno(-nlerr->error);
+	break;
+      }
+    }
+    break;
+  }
+  if (result < 0)
+    if (buff){
+      int saved_errno = errno;
+      free(buff);
+      __set_errno(saved_errno);
+    }
+  *nlhp = (struct nlmsghdr *)buff;
+  return result;
+}
+
+static int
+nl_getlist(int sd, int seq,
+	   int request,
+	   struct nlmsg_list **nlm_list,
+	   struct nlmsg_list **nlm_end)
+{
+  struct nlmsghdr *nlh = NULL;
+  int status;
+  int done = 0;
+
+  status = nl_sendreq(sd, request, NLM_F_ROOT|NLM_F_MATCH, &seq);
+  if (status < 0)
+    return status;
+  if (seq == 0)
+    seq = (int)time(NULL);
+  while(!done){
+    status = nl_getmsg(sd, request, seq, &nlh, &done);
+    if (status < 0)
+      return status;
+    if (nlh){
+      struct nlmsg_list *nlm_next = (struct nlmsg_list *)malloc(sizeof(struct nlmsg_list));
+      if (nlm_next == NULL){
+	int saved_errno = errno;
+	free(nlh);
+	__set_errno(saved_errno);
+	status = -1;
+      } else {
+	nlm_next->nlm_next = NULL;
+	nlm_next->nlh = (struct nlmsghdr *)nlh;
+	nlm_next->size = status;
+	nlm_next->seq = seq;
+	if (*nlm_list == NULL){
+	  *nlm_list = nlm_next;
+	  *nlm_end = nlm_next;
+	} else {
+	  (*nlm_end)->nlm_next = nlm_next;
+	  *nlm_end = nlm_next;
+	}
+      }
+    }
+  }
+  return status >= 0 ? seq : status;
+}
+
+/* ---------------------------------------------------------------------- */
+static void 
+free_nlmsglist(struct nlmsg_list *nlm0)
+{
+  struct nlmsg_list *nlm;
+  int saved_errno;
+  if (!nlm0)
+    return;
+  saved_errno = errno;
+  for (nlm=nlm0; nlm; nlm=nlm->nlm_next){
+    if (nlm->nlh)
+      free(nlm->nlh);
+  }
+  free(nlm0);
+  __set_errno(saved_errno);
+}
+
+static void 
+free_data(void *data, void *ifdata)
+{
+  int saved_errno = errno;
+  if (data != NULL) free(data);
+  if (ifdata != NULL) free(ifdata);
+  __set_errno(saved_errno);
+}
+
+/* ---------------------------------------------------------------------- */
+static void 
+nl_close(int sd)
+{
+  int saved_errno = errno;
+  if (sd >= 0) __close(sd);
+  __set_errno(saved_errno);
+}
+
+/* ---------------------------------------------------------------------- */
+static int 
+nl_open(void)
+{
+  struct sockaddr_nl nladdr;
+  int sd;
+
+  sd = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+  if (sd < 0) return -1;
+  memset(&nladdr, 0, sizeof(nladdr));
+  nladdr.nl_family = AF_NETLINK;
+  if (bind(sd, (struct sockaddr*)&nladdr, sizeof(nladdr)) < 0){
+    nl_close(sd);
+    return -1;
+  }
+  return sd;
+}
+
+/* ====================================================================== */
+int getifaddrs(struct ifaddrs **ifap)
+{
+  int sd;
+  struct nlmsg_list *nlmsg_list, *nlmsg_end, *nlm;
+  /* - - - - - - - - - - - - - - - */
+  int icnt;
+  size_t dlen, xlen, nlen;
+  uint32_t max_ifindex = 0;
+
+  pid_t pid = getpid();
+  int seq;
+  int result;
+  int build     ; /* 0 or 1 */
+
+/* ---------------------------------- */
+  /* initialize */
+  icnt = dlen = xlen = nlen = 0;
+  nlmsg_list = nlmsg_end = NULL;
+
+  if (ifap)
+    *ifap = NULL;
+
+/* ---------------------------------- */
+  /* open socket and bind */
+  sd = nl_open();
+  if (sd < 0)
+    return -1;
+
+/* ---------------------------------- */
+   /* gather info */
+  if ((seq = nl_getlist(sd, 0, RTM_GETLINK,
+			&nlmsg_list, &nlmsg_end)) < 0){
+    free_nlmsglist(nlmsg_list);
+    nl_close(sd);
+    return -1;
+  }
+  if ((seq = nl_getlist(sd, seq+1, RTM_GETADDR,
+			&nlmsg_list, &nlmsg_end)) < 0){
+    free_nlmsglist(nlmsg_list);
+    nl_close(sd);
+    return -1;
+  }
+
+/* ---------------------------------- */
+  /* Estimate size of result buffer and fill it */
+  for (build=0; build<=1; build++){
+    struct ifaddrs *ifl = NULL, *ifa = NULL;
+    struct nlmsghdr *nlh, *nlh0;
+    void *data = NULL, *xdata = NULL, *ifdata = NULL;
+    char *ifname = NULL, **iflist = NULL;
+    uint16_t *ifflist = NULL;
+    struct rtmaddr_ifamap ifamap;
+
+    if (build){
+      ifa = data = calloc(1,
+			  NLMSG_ALIGN(sizeof(struct ifaddrs[icnt]))
+			  + dlen + xlen + nlen);
+      ifdata = calloc(1, 
+		      NLMSG_ALIGN(sizeof(char *[max_ifindex+1]))
+		      + NLMSG_ALIGN(sizeof(uint16_t [max_ifindex+1])));
+      if (ifap != NULL)
+	*ifap = (ifdata != NULL) ? ifa : NULL;
+      else{
+	free_data(data, ifdata);
+	result = 0;
+	break;
+      }
+      if (data == NULL || ifdata == NULL){
+	free_data(data, ifdata);
+	result = -1;
+	break;
+      }
+      ifl = NULL;
+      data += NLMSG_ALIGN(sizeof(struct ifaddrs)) * icnt;
+      xdata = data + dlen;
+      ifname = xdata + xlen;
+      iflist = ifdata;
+      ifflist = ((void *)iflist) + NLMSG_ALIGN(sizeof(char *[max_ifindex+1]));
+    }
+
+    for (nlm=nlmsg_list; nlm; nlm=nlm->nlm_next){
+      int nlmlen = nlm->size;
+      if (!(nlh0 = nlm->nlh))
+	continue;
+      for (nlh = nlh0; 
+	   NLMSG_OK(nlh, nlmlen); 
+	   nlh=NLMSG_NEXT(nlh,nlmlen)){
+	struct ifinfomsg *ifim = NULL;
+	struct ifaddrmsg *ifam = NULL;
+	struct rtattr *rta;
+
+	size_t nlm_struct_size = 0;
+	sa_family_t nlm_family = 0;
+	uint32_t nlm_scope = 0, nlm_index = 0;
+	size_t sockaddr_size = 0;
+	uint32_t nlm_prefixlen = 0;
+	size_t rtasize;
+
+	memset(&ifamap, 0, sizeof(ifamap));
+
+	/* check if the message is what we want */
+	if (nlh->nlmsg_pid != pid ||
+	    nlh->nlmsg_seq != nlm->seq)
+	  continue;
+	if (nlh->nlmsg_type == NLMSG_DONE){
+	  break; /* ok */
+	}
+	switch (nlh->nlmsg_type){
+	case RTM_NEWLINK:
+	  ifim = (struct ifinfomsg *)NLMSG_DATA(nlh);
+	  nlm_struct_size = sizeof(*ifim);
+	  nlm_family = ifim->ifi_family;
+	  nlm_scope = 0;
+	  nlm_index = ifim->ifi_index;
+	  nlm_prefixlen = 0;
+	  if (build)
+	    ifflist[nlm_index] = ifa->ifa_flags = ifim->ifi_flags;
+	  break;
+	case RTM_NEWADDR:
+	  ifam = (struct ifaddrmsg *)NLMSG_DATA(nlh);
+	  nlm_struct_size = sizeof(*ifam);
+	  nlm_family = ifam->ifa_family;
+	  nlm_scope = ifam->ifa_scope;
+	  nlm_index = ifam->ifa_index;
+	  nlm_prefixlen = ifam->ifa_prefixlen;
+	  if (build)
+	    ifa->ifa_flags = ifflist[nlm_index];
+	  break;
+	default:
+	  continue;
+	}
+	
+	if (!build){
+	  if (max_ifindex < nlm_index)
+	    max_ifindex = nlm_index;
+	} else {
+	  if (ifl != NULL)
+	    ifl->ifa_next = ifa;
+	}
+
+	rtasize = NLMSG_PAYLOAD(nlh, nlmlen) - NLMSG_ALIGN(nlm_struct_size);
+	for (rta = (struct rtattr *)(((char *)NLMSG_DATA(nlh)) + NLMSG_ALIGN(nlm_struct_size));
+	     RTA_OK(rta, rtasize);
+	     rta = RTA_NEXT(rta, rtasize)){
+	  struct sockaddr **sap = NULL;
+	  void *rtadata = RTA_DATA(rta);
+	  size_t rtapayload = RTA_PAYLOAD(rta);
+	  socklen_t sa_len;
+
+	  switch(nlh->nlmsg_type){
+	  case RTM_NEWLINK:
+	    switch(rta->rta_type){
+	    case IFLA_ADDRESS:
+	    case IFLA_BROADCAST:
+	      if (build){
+		sap = (rta->rta_type == IFLA_ADDRESS) ? &ifa->ifa_addr : &ifa->ifa_broadaddr;
+		*sap = (struct sockaddr *)data;
+	      }
+	      sa_len = ifa_sa_len(AF_PACKET, rtapayload);
+	      if (rta->rta_type == IFLA_ADDRESS)
+		sockaddr_size = NLMSG_ALIGN(sa_len);
+	      if (!build){
+		dlen += NLMSG_ALIGN(sa_len);
+	      } else {
+		memset(*sap, 0, sa_len);
+		ifa_make_sockaddr(AF_PACKET, *sap, rtadata,rtapayload, 0,0);
+		((struct sockaddr_ll *)*sap)->sll_ifindex = nlm_index;
+		((struct sockaddr_ll *)*sap)->sll_hatype = ifim->ifi_type;
+		data += NLMSG_ALIGN(sa_len);
+	      }
+	      break;
+	    case IFLA_IFNAME:/* Name of Interface */
+	      if (!build)
+		nlen += NLMSG_ALIGN(rtapayload + 1);
+	      else{
+		ifa->ifa_name = ifname;
+		if (iflist[nlm_index] == NULL)
+		  iflist[nlm_index] = ifa->ifa_name;
+		strncpy(ifa->ifa_name, rtadata, rtapayload);
+		ifa->ifa_name[rtapayload] = '\0';
+		ifname += NLMSG_ALIGN(rtapayload + 1);
+	      }
+	      break;
+	    case IFLA_STATS:/* Statistics of Interface */
+	      if (!build)
+		xlen += NLMSG_ALIGN(rtapayload);
+	      else{
+		ifa->ifa_data = xdata;
+		memcpy(ifa->ifa_data, rtadata, rtapayload);
+		xdata += NLMSG_ALIGN(rtapayload);
+	      }
+	      break;
+	    case IFLA_UNSPEC:
+	      break;
+	    case IFLA_MTU:
+	      break;
+	    case IFLA_LINK:
+	      break;
+	    case IFLA_QDISC:
+	      break;
+	    default:
+	    }
+	    break;
+	  case RTM_NEWADDR:
+	    if (nlm_family == AF_PACKET) break;
+	    switch(rta->rta_type){
+	    case IFA_ADDRESS:
+		ifamap.address = rtadata;
+		ifamap.address_len = rtapayload;
+		break;
+	    case IFA_LOCAL:
+		ifamap.local = rtadata;
+		ifamap.local_len = rtapayload;
+		break;
+	    case IFA_BROADCAST:
+		ifamap.broadcast = rtadata;
+		ifamap.broadcast_len = rtapayload;
+		break;
+#ifdef HAVE_IFADDRS_IFA_ANYCAST
+	    case IFA_ANYCAST:
+		ifamap.anycast = rtadata;
+		ifamap.anycast_len = rtapayload;
+		break;
+#endif
+	    case IFA_LABEL:
+	      if (!build)
+		nlen += NLMSG_ALIGN(rtapayload + 1);
+	      else{
+		ifa->ifa_name = ifname;
+		if (iflist[nlm_index] == NULL)
+		  iflist[nlm_index] = ifname;
+		strncpy(ifa->ifa_name, rtadata, rtapayload);
+		ifa->ifa_name[rtapayload] = '\0';
+		ifname += NLMSG_ALIGN(rtapayload + 1);
+	      }
+	      break;
+	    case IFA_UNSPEC:
+	      break;
+	    case IFA_CACHEINFO:
+	      break;
+	    default:
+	    }
+	  }
+	}
+	if (nlh->nlmsg_type == RTM_NEWADDR &&
+	    nlm_family != AF_PACKET) {
+	  if (!ifamap.local) {
+	    ifamap.local = ifamap.address;
+	    ifamap.local_len = ifamap.address_len;
+	  }
+	  if (!ifamap.address) {
+	    ifamap.address = ifamap.local;
+	    ifamap.address_len = ifamap.local_len;
+	  }
+	  if (ifamap.address_len != ifamap.local_len ||
+	      (ifamap.address != NULL &&
+	       memcmp(ifamap.address, ifamap.local, ifamap.address_len))) {
+	    /* p2p; address is peer and local is ours */
+	    ifamap.broadcast = ifamap.address;
+	    ifamap.broadcast_len = ifamap.address_len;
+	    ifamap.address = ifamap.local;
+	    ifamap.address_len = ifamap.local_len;
+	  }
+	  if (ifamap.address) {
+#ifndef IFA_NETMASK
+	    sockaddr_size = NLMSG_ALIGN(ifa_sa_len(nlm_family,ifamap.address_len));
+#endif
+	    if (!build)
+	      dlen += NLMSG_ALIGN(ifa_sa_len(nlm_family,ifamap.address_len));
+	    else {
+	      ifa->ifa_addr = (struct sockaddr *)data;
+	      ifa_make_sockaddr(nlm_family, ifa->ifa_addr, ifamap.address, ifamap.address_len,
+				nlm_scope, nlm_index);
+	      data += NLMSG_ALIGN(ifa_sa_len(nlm_family, ifamap.address_len));
+	    }
+	  }
+#ifdef IFA_NETMASK
+	  if (ifamap.netmask) {
+	    if (!build)
+	      dlen += NLMSG_ALIGN(ifa_sa_len(nlm_family,ifamap.netmask_len));
+	    else {
+	      ifa->ifa_netmask = (struct sockaddr *)data;
+	      ifa_make_sockaddr(nlm_family, ifa->ifa_netmask, ifamap.netmask, ifamap.netmask_len,
+				nlm_scope, nlm_index);
+	      data += NLMSG_ALIGN(ifa_sa_len(nlm_family, ifamap.netmask_len));
+	    }
+	  }
+#endif
+	  if (ifamap.broadcast) {
+	    if (!build)
+	      dlen += NLMSG_ALIGN(ifa_sa_len(nlm_family,ifamap.broadcast_len));
+	    else {
+	      ifa->ifa_broadaddr = (struct sockaddr *)data;
+	      ifa_make_sockaddr(nlm_family, ifa->ifa_broadaddr, ifamap.broadcast, ifamap.broadcast_len,
+				nlm_scope, nlm_index);
+	      data += NLMSG_ALIGN(ifa_sa_len(nlm_family, ifamap.broadcast_len));
+	    }
+	  }
+#ifdef HAVE_IFADDRS_IFA_ANYCAST
+	  if (ifamap.anycast) {
+	    if (!build)
+	      dlen += NLMSG_ALIGN(ifa_sa_len(nlm_family,ifamap.anycast_len));
+	    else {
+	      ifa->ifa_anycast = (struct sockaddr *)data;
+	      ifa_make_sockaddr(nlm_family, ifa->ifa_anyaddr, ifamap.anycast, ifamap.anycast_len,
+				nlm_scope, nlm_index);
+	      data += NLMSG_ALIGN(ifa_sa_len(nlm_family, ifamap.anycast_len));
+	    }
+	  }
+#endif
+	}
+	if (!build){
+#ifndef IFA_NETMASK
+	  dlen += sockaddr_size;
+#endif
+	  icnt++;
+	} else {
+	  if (ifa->ifa_name == NULL)
+	    ifa->ifa_name = iflist[nlm_index];
+#ifndef IFA_NETMASK
+	  if (ifa->ifa_addr && 
+	      ifa->ifa_addr->sa_family != AF_UNSPEC && 
+	      ifa->ifa_addr->sa_family != AF_PACKET){
+	    ifa->ifa_netmask = (struct sockaddr *)data;
+	    ifa_make_sockaddr_mask(ifa->ifa_addr->sa_family, ifa->ifa_netmask, nlm_prefixlen);
+	  }
+	  data += sockaddr_size;
+#endif
+	  ifl = ifa++;
+	}
+      }
+    }
+    if (!build){
+      if (icnt == 0 && (dlen + nlen + xlen == 0)){
+	if (ifap != NULL)
+	  *ifap = NULL;
+	break; /* cannot found any addresses */
+      }
+    }
+    else
+      free_data(NULL, ifdata);
+  }
+
+/* ---------------------------------- */
+  /* Finalize */
+  free_nlmsglist(nlmsg_list);
+  nl_close(sd);
+  return 0;
+}
+
+/* ---------------------------------------------------------------------- */
+void 
+freeifaddrs(struct ifaddrs *ifa)
+{
+  free(ifa);
+}
+
+
+#else /* !AF_NETLINK */
+
+/*
+ * The generic SIOCGIFCONF version.
+ */
+
 static int
 getifaddrs2(struct ifaddrs **ifap, 
 	    int af, int siocgifconf, int siocgifflags,
@@ -355,6 +1127,8 @@ freeifaddrs(struct ifaddrs *ifp)
    }
 }

+#endif /* !AF_NETLINK */
+
 #ifdef TEST

 void