68 lines
1.4 KiB
C
68 lines
1.4 KiB
C
#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <ifaddrs.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <netinet/in.h>
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#include <net/gen/in.h>
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#include <net/gen/ip_io.h>
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#include <net/gen/tcp.h>
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#include <net/gen/udp.h>
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int
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getifaddrs(struct ifaddrs **ifap)
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{
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static int fd = -1;
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nwio_ipconf_t ipconf;
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int flags;
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static struct ifaddrs ifa;
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static struct sockaddr_in addr, netmask;
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memset(&ifa, 0, sizeof(ifa));
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memset(&addr, 0, sizeof(addr));
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memset(&netmask, 0, sizeof(netmask));
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ifa.ifa_next = NULL;
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ifa.ifa_name = "ip";
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addr.sin_family = netmask.sin_family = AF_INET;
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ifa.ifa_addr = (struct sockaddr *) &addr;
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ifa.ifa_netmask = (struct sockaddr *) &netmask;
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addr.sin_addr.s_addr = 0;
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netmask.sin_addr.s_addr = 0;
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if(fd < 0) {
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char *ipd;
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if(!(ipd=getenv("IP_DEVICE")))
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ipd="/dev/ip";
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if((fd = open(ipd, O_RDWR)) < 0)
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return -1;
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}
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/* Code taken from commands/simple/ifconfig.c. */
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if((flags = fcntl(fd, F_GETFL)) < 0 ||
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fcntl(fd, F_SETFL, flags | O_NONBLOCK) < 0 ||
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ioctl(fd, NWIOGIPCONF, &ipconf))
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return 0; /* Report interface as down. */
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addr.sin_addr.s_addr = ipconf.nwic_ipaddr;
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netmask.sin_addr.s_addr = ipconf.nwic_netmask;
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if(addr.sin_addr.s_addr) ifa.ifa_flags = IFF_UP;
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/* Just report on this interface. */
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*ifap = &ifa;
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return 0;
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}
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void
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freeifaddrs(struct ifaddrs *ifp)
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{
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/* getifaddrs points to static data, so no need to free. */
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;
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}
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