+/*
+ * Copyright (c) 2001 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
+ * Reserved. This file contains Original Code and/or Modifications of
+ * Original Code as defined in and that are subject to the Apple Public
+ * Source License Version 1.1 (the "License"). You may not use this file
+ * except in compliance with the License. Please obtain a copy of the
+ * License at http://www.apple.com/publicsource and read it before using
+ * this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT. Please see the
+ * License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "sys_interfaces.h"
+
+__private_extern__ interface_list_t *
+sys_interfaces(void)
+{
+ struct ifconf ifc;
+ struct ifreq *ifr;
+ char buf[1024]; /* XXX */
+ int offset, addrlen, extra, delta;
+ int sock;
+ interface_t *iface;
+ interface_list_t *my_interfaces;
+
+ sock = socket(AF_INET, SOCK_DGRAM, 0);
+
+ if (sock < 0) return NULL;
+
+ ifc.ifc_len = sizeof(buf);
+ ifc.ifc_buf = buf;
+
+ if (ioctl(sock, SIOCGIFCONF, (char *)&ifc) < 0)
+ {
+ close(sock);
+ return NULL;
+ }
+
+ my_interfaces = (interface_list_t *)malloc(sizeof(interface_list_t));
+ my_interfaces->count = 0;
+ my_interfaces->interface = NULL;
+
+ delta = sizeof(struct ifreq);
+ addrlen = delta - IFNAMSIZ;
+ extra = 0;
+
+ offset = 0;
+
+ while (offset <= ifc.ifc_len)
+ {
+ ifr = (struct ifreq *)(ifc.ifc_buf + offset);
+
+#ifndef _NO_SOCKADDR_LENGTH_
+ extra = ifr->ifr_addr.sa_len - addrlen;
+ if (extra < 0) extra = 0;
+#endif
+
+ offset = offset + delta + extra;
+
+ if (ifr->ifr_addr.sa_family != AF_INET) continue;
+ if (ioctl(sock, SIOCGIFFLAGS, (char *)ifr) < 0) continue;
+
+ my_interfaces->count++;
+ if (my_interfaces->count == 1)
+ {
+ my_interfaces->interface = (interface_t *)malloc(sizeof(interface_t));
+ }
+ else
+ {
+ my_interfaces->interface = (interface_t *)realloc(my_interfaces->interface, my_interfaces->count * sizeof(interface_t));
+ }
+
+ iface = &(my_interfaces->interface[my_interfaces->count - 1]);
+ memset(iface, 0, sizeof(interface_t));
+
+ memmove(iface->name, ifr->ifr_name, IFNAMSIZ);
+ iface->flags = ifr->ifr_ifru.ifru_flags;
+ iface->addr.s_addr = ((struct sockaddr_in *)&(ifr->ifr_addr))->sin_addr.s_addr;
+ ioctl(sock, SIOCGIFNETMASK, (char *)ifr);
+ iface->mask.s_addr = ((struct sockaddr_in *)&(ifr->ifr_addr))->sin_addr.s_addr;
+ iface->netaddr.s_addr = iface->addr.s_addr & iface->mask.s_addr;
+ iface->bcast.s_addr = iface->netaddr.s_addr | (~iface->mask.s_addr);
+ }
+
+ close(sock);
+ return my_interfaces;
+}
+
+__private_extern__ void
+sys_interfaces_release(interface_list_t *l)
+{
+ if (l == NULL) return;
+
+ if (l->interface != NULL) free(l->interface);
+ free(l);
+}
+
+__private_extern__ int
+sys_is_my_address(interface_list_t *l, struct in_addr *a)
+{
+ int i;
+
+ if (l == NULL) return 0;
+
+ for (i = 0; i < l->count; i++)
+ {
+ if (a->s_addr == l->interface[i].addr.s_addr) return 1;
+ }
+ return 0;
+}
+
+__private_extern__ int
+sys_is_my_network(interface_list_t *l, struct in_addr *a)
+{
+ int i;
+
+ if (l == NULL) return 0;
+
+ for (i = 0; i < l->count; i++)
+ {
+ if ((a->s_addr & l->interface[i].mask.s_addr) ==
+ l->interface[i].netaddr.s_addr) return 1;
+
+ }
+ return 0;
+}
projects / apple / libinfo.git / commitdiff
