darwin
diff --git a/src/libip/BSD.c b/src/libip/BSD.c
new file mode 100644
index 0000000..9bf2db0
--- /dev/null
+++ b/src/libip/BSD.c
@@ -0,0 +1,146 @@
+#include <u.h>
+/* #include <everything_but_the_kitchen_sink.h> */
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <net/if.h>
+#include <sys/ioctl.h>
+#include <sys/sysctl.h>
+#include <net/ethernet.h>
+#include <net/if.h>
+#include <net/if_var.h>
+#include <net/if_dl.h>
+#include <net/if_types.h>
+#include <net/route.h>
+#include <netinet/in.h>
+#include <netinet/in_var.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <libc.h>
+#include <ip.h>
+
+static void
+sockaddr2ip(uchar *ip, struct sockaddr *sa)
+{
+ struct sockaddr_in *sin;
+
+ sin = (struct sockaddr_in*)sa;
+ memmove(ip, v4prefix, IPaddrlen);
+ memmove(ip+IPv4off, &sin->sin_addr, 4);
+}
+
+Ipifc*
+readipifc(char *net, Ipifc *ifc, int index)
+{
+ char *p, *ep, *q, *bp;
+ int i, mib[6];
+ size_t n;
+ Ipifc *list, **last;
+ Iplifc *lifc, **lastlifc;
+ struct if_msghdr *mh, *nmh;
+ struct ifa_msghdr *ah;
+ struct sockaddr *sa;
+ struct sockaddr_dl *sdl;
+ uchar ip[IPaddrlen];
+
+ USED(net);
+
+ free(ifc);
+ ifc = nil;
+ list = nil;
+ last = &list;
+
+ /*
+ * Does not handle IPv6 yet.
+ */
+
+ mib[0] = CTL_NET;
+ mib[1] = PF_ROUTE;
+ mib[2] = 0;
+ mib[3] = 0;
+ mib[4] = NET_RT_IFLIST;
+ mib[5] = 0;
+
+ n = 0;
+ if(sysctl(mib, 6, nil, &n, nil, 0) < 0)
+ return nil;
+ bp = mallocz(n, 1);
+ if(bp == nil)
+ return nil;
+ if(sysctl(mib, 6, bp, &n, nil, 0) < 0){
+ free(bp);
+ return nil;
+ }
+
+ p = bp;
+ ep = p+n;
+ while(p < ep){
+ mh = (struct if_msghdr*)p;
+ p += mh->ifm_msglen;
+ if(mh->ifm_type != RTM_IFINFO)
+ continue;
+ ifc = mallocz(sizeof *ifc, 1);
+ if(ifc == nil)
+ break;
+ *last = ifc;
+ last = &ifc->next;
+ sdl = (struct sockaddr_dl*)(mh+1);
+ n = sdl->sdl_nlen;
+ if(n >= sizeof ifc->dev)
+ n = sizeof ifc->dev - 1;
+ memmove(ifc->dev, sdl->sdl_data, n);
+ ifc->dev[n] = 0;
+ ifc->rp.linkmtu = mh->ifm_data.ifi_mtu;
+ lastlifc = &ifc->lifc;
+
+ if(sdl->sdl_type == IFT_ETHER && sdl->sdl_alen == 6)
+ memmove(ifc->ether, LLADDR(sdl), 6);
+
+ while(p < ep){
+ ah = (struct ifa_msghdr*)p;
+ nmh = (struct if_msghdr*)p;
+ if(nmh->ifm_type != RTM_NEWADDR)
+ break;
+ p += nmh->ifm_msglen;
+ lifc = nil;
+ for(i=0, q=(char*)(ah+1); i<RTAX_MAX && q<p; i++){
+ if(!(ah->ifam_addrs & (1<<i)))
+ continue;
+ sa = (struct sockaddr*)q;
+ q += (sa->sa_len+sizeof(long)-1) & ~(sizeof(long)-1);
+ if(sa->sa_family != AF_INET)
+ continue;
+ if(lifc == nil){
+ lifc = mallocz(sizeof *lifc, 1);
+ if(lifc == nil)
+ continue;
+ *lastlifc = lifc;
+ lastlifc = &lifc->next;
+ }
+ sockaddr2ip(ip, sa);
+ switch(i){
+ case RTAX_IFA:
+ ipmove(lifc->ip, ip);
+ break;
+ case RTAX_NETMASK:
+ memset(ip, 0xFF, IPv4off);
+ ipmove(lifc->mask, ip);
+ break;
+ case RTAX_BRD:
+ if(mh->ifm_flags & IFF_POINTOPOINT)
+ /* ipmove(lifc->remote, ip) */ ;
+ if(mh->ifm_flags & IFF_BROADCAST)
+ /* ipmove(lifc->bcast, ip) */ ;
+ break;
+ case RTAX_GATEWAY:
+ break;
+ case RTAX_DST:
+ break;
+ }
+ }
+ if(lifc)
+ maskip(lifc->ip, lifc->mask, lifc->net);
+ }
+ }
+ free(bp);
+ return list;
+}
