--- lib/isc/unix/ifiter_getifaddrs.c.ORG	2019-05-16 23:19:55.760463495 +0530
+++ lib/isc/unix/ifiter_getifaddrs.c	2019-05-16 23:22:28.606616737 +0530
@@ -18,7 +18,39 @@
 
 #include <stdbool.h>
 
-#include <ifaddrs.h>
+#ifndef GENERIC_AIX_IFADDRS_H
+#define GENERIC_AIX_IFADDRS_H
+
+#include <sys/socket.h>
+#include <net/if.h>
+
+#undef  ifa_dstaddr
+#undef  ifa_broadaddr
+#define ifa_broadaddr ifa_dstaddr
+
+struct ifaddrs {
+  struct ifaddrs  *ifa_next;
+  char            *ifa_name;
+  unsigned int     ifa_flags;
+  struct sockaddr *ifa_addr;
+  struct sockaddr *ifa_netmask;
+  struct sockaddr *ifa_dstaddr;
+};
+
+extern int getifaddrs(struct ifaddrs **);
+extern void freeifaddrs(struct ifaddrs *);
+
+#endif
+
+
+#include <string.h>
+#include <sys/ioctl.h>
+
+
+#define MAX(x,y) ((x)>(y)?(x):(y))
+#define SIZE(p) MAX((p).sa_len,sizeof(p))
+
+
 
 #include <isc/strerr.h>
 
@@ -226,3 +258,89 @@
 #endif
 	iter->pos = iter->ifaddrs;
 }
+
+
+
+static struct sockaddr *
+sa_dup (struct sockaddr *sa1)
+{
+  struct sockaddr *sa2;
+  size_t sz = sa1->sa_len;
+  sa2 = (struct sockaddr *) calloc(1,sz);
+  memcpy(sa2,sa1,sz);
+  return(sa2);
+}
+
+
+void freeifaddrs (struct ifaddrs *ifp)
+{
+  if (NULL == ifp) return;
+  free(ifp->ifa_name);
+  free(ifp->ifa_addr);
+  free(ifp->ifa_netmask);
+  free(ifp->ifa_dstaddr);
+  freeifaddrs(ifp->ifa_next);
+  free(ifp);
+}
+
+
+int getifaddrs (struct ifaddrs **ifap)
+{
+  int  sd, ifsize;
+  char *ccp, *ecp;
+  struct ifconf ifc;
+  struct ifreq *ifr;
+  struct ifaddrs *cifa = NULL; /* current */
+  struct ifaddrs *pifa = NULL; /* previous */
+  const size_t IFREQSZ = sizeof(struct ifreq);
+
+  sd = socket(AF_INET, SOCK_DGRAM, 0);
+
+  *ifap = NULL;
+
+  /* find how much memory to allocate for the SIOCGIFCONF call */
+  if (ioctl(sd, SIOCGSIZIFCONF, (caddr_t)&ifsize) < 0) return(-1);
+
+  ifc.ifc_req = (struct ifreq *) calloc(1,ifsize);
+  ifc.ifc_len = ifsize;
+
+  if (ioctl(sd, SIOCGIFCONF, &ifc) < 0) return(-1);
+
+  ccp = (char *)ifc.ifc_req;
+  ecp = ccp + ifsize;
+
+  while (ccp < ecp) {
+
+    ifr = (struct ifreq *) ccp;
+    ifsize = sizeof(ifr->ifr_name) + SIZE(ifr->ifr_addr);
+    cifa = (struct ifaddrs *) calloc(1, sizeof(struct ifaddrs));
+    cifa->ifa_next = NULL;
+    cifa->ifa_name = strdup(ifr->ifr_name);
+
+    if (pifa == NULL) *ifap = cifa; /* first one */
+    else     pifa->ifa_next = cifa;
+
+    if (ioctl(sd, SIOCGIFADDR, ifr, IFREQSZ) < 0) return(-1);
+    cifa->ifa_addr = sa_dup(&ifr->ifr_addr);
+
+    if (ioctl(sd, SIOCGIFNETMASK, ifr, IFREQSZ) < 0) return(-1);
+    cifa->ifa_netmask = sa_dup(&ifr->ifr_addr);
+
+    cifa->ifa_flags = 0;
+    cifa->ifa_dstaddr = NULL;
+
+    if (0 == ioctl(sd, SIOCGIFFLAGS, ifr)) /* optional */
+      cifa->ifa_flags = ifr->ifr_flags;
+
+    if (ioctl(sd, SIOCGIFDSTADDR, ifr, IFREQSZ) < 0) {
+      if (0 == ioctl(sd, SIOCGIFBRDADDR, ifr, IFREQSZ))
+         cifa->ifa_dstaddr = sa_dup(&ifr->ifr_addr);
+    }
+    else cifa->ifa_dstaddr = sa_dup(&ifr->ifr_addr);
+
+    pifa = cifa;
+    ccp += ifsize;
+  }
+  return 0;
+}
+