2 * Copyright (c) 1990,1993 Regents of The University of Michigan.
3 * Copyright (c) 1999-2000 Adrian Sun.
4 * All Rights Reserved. See COPYRIGHT.
19 #include <sys/types.h>
20 #include <sys/socket.h>
21 #include <sys/ioctl.h>
22 #include <netinet/in.h>
23 #include <netinet/tcp.h>
28 #include <sys/sockio.h>
31 #include <atalk/util.h>
33 /* allocation size for interface list. */
36 /* we leave all of the ioctl's to the application */
37 static int addname(char **list, int *i, int *length, const char *name)
40 /* if we've run out of room, allocate some more. just return
41 * the present list if we can't. */
43 char **new = realloc(list, sizeof(char **)*(*length + IFACE_NUM));
45 if (!new) /* just break if we can't allocate anything */
50 if ((list[*i] = strdup(name)) == NULL)
54 list[*i] = NULL; /* zero out the next entry */
59 static int getifaces(const int sockfd, char **list, int *length)
61 #ifdef HAVE_IFNAMEINDEX
62 struct if_nameindex *ifstart, *ifs;
65 if (!list || *length < 1)
68 ifs = ifstart = if_nameindex();
69 while (ifs && ifs->if_name) {
70 /* just bail if there's a problem */
71 if (addname(list, &i, length, ifs->if_name) < 0)
76 if_freenameindex(ifstart);
81 struct ifreq ifrs[ 64 ], *ifr, *nextifr;
84 if (!list || *length < 1)
87 memset( &ifc, 0, sizeof( struct ifconf ));
88 ifc.ifc_len = sizeof( ifrs );
89 memset( ifrs, 0, sizeof( ifrs ));
90 ifc.ifc_buf = (caddr_t)ifrs;
91 if ( ioctl( sockfd, SIOCGIFCONF, &ifc ) < 0 ) {
95 for ( ifr = ifc.ifc_req; ifc.ifc_len >= sizeof( struct ifreq );
96 ifc.ifc_len -= ifrsize, ifr = nextifr ) {
98 ifrsize = sizeof(ifr->ifr_name) +
99 (ifr->ifr_addr.sa_len > sizeof(struct sockaddr)
100 ? ifr->ifr_addr.sa_len : sizeof(struct sockaddr));
102 ifrsize = sizeof( struct ifreq );
104 nextifr = (struct ifreq *)((caddr_t)ifr + ifrsize );
106 /* just bail if there's a problem */
107 if (addname(list, &i, length, ifr->ifr_name) < 0)
116 * Get interfaces from the kernel. we keep an extra null entry to signify
117 * the end of the interface list.
119 char **getifacelist()
121 char **list = (char **) malloc(sizeof(char **)*(IFACE_NUM + 1));
123 int length = IFACE_NUM, i, fd;
128 if ((fd = socket(PF_INET, SOCK_STREAM, 0)) < 0)
131 if ((i = getifaces(fd, list, &length)) == 0) {
139 (new = (char **) realloc(list, sizeof(char **)*(i + 1))))
146 /* go through and free the interface list */
147 void freeifacelist(char **ifacelist)
149 char *value, **list = ifacelist;
154 while ((value = *list++)) {