diff options
Diffstat (limited to 'lib/libc/net/ifname.c')
| -rw-r--r-- | lib/libc/net/ifname.c | 212 |
1 files changed, 0 insertions, 212 deletions
diff --git a/lib/libc/net/ifname.c b/lib/libc/net/ifname.c deleted file mode 100644 index 3d3916a..0000000 --- a/lib/libc/net/ifname.c +++ /dev/null @@ -1,212 +0,0 @@ -/* - * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the project nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * $FreeBSD$ - */ -/* - * TODO: - * - prototype defs into arpa/inet.h, not net/if.h (bsd-api-new-02) - */ - -#include <sys/param.h> -#include <sys/socket.h> -#include <sys/sysctl.h> -#include <net/if.h> -#include <net/route.h> -#include <net/if_dl.h> - -#include <errno.h> -#include <stdlib.h> -#include <string.h> - -#define ROUNDUP(a) \ - ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) -#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) - -unsigned int -if_nametoindex(ifname) - const char *ifname; -{ - struct if_nameindex *iff = if_nameindex(), *ifx; - int ret; - - if (iff == NULL) return 0; - ifx = iff; - while (ifx->if_name != NULL) { - if (strcmp(ifx->if_name, ifname) == 0) { - ret = ifx->if_index; - if_freenameindex(iff); - return ret; - } - ifx++; - } - if_freenameindex(iff); - errno = ENXIO; - return 0; -} - -char * -if_indextoname(ifindex, ifname) - unsigned int ifindex; - char *ifname; /* at least IF_NAMESIZE */ -{ - struct if_nameindex *iff = if_nameindex(), *ifx; - char *cp, *dp; - - if (iff == NULL) return NULL; - ifx = iff; - while (ifx->if_index != 0) { - if (ifx->if_index == ifindex) { - cp = ifname; - dp = ifx->if_name; - while ((*cp++ = *dp++)) ; - if_freenameindex(iff); - return (ifname); - } - ifx++; - } - if_freenameindex(iff); - errno = ENXIO; - return NULL; -} - -struct if_nameindex * -if_nameindex() -{ - size_t needed; - int mib[6], i, ifn = 0, off = 0, hlen; - char *buf = NULL, *lim, *next, *cp, *ifbuf = NULL; - struct rt_msghdr *rtm; - struct if_msghdr *ifm; - struct sockaddr *sa; - struct sockaddr_dl *sdl; - struct if_nameindex *ret = NULL; - static int ifxs = 64; /* initial upper limit */ - struct _ifx { - int if_index; - int if_off; - } *ifx = NULL; - - mib[0] = CTL_NET; - mib[1] = PF_ROUTE; - mib[2] = 0; /* protocol */ - mib[3] = 0; /* wildcard address family */ - mib[4] = NET_RT_IFLIST; - mib[5] = 0; /* no flags */ - if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) - return NULL; - if ((buf = malloc(needed)) == NULL) { - errno = ENOMEM; - goto end; - } - /* XXX: we may have allocated too much than necessary */ - if ((ifbuf = malloc(needed)) == NULL) { - errno = ENOMEM; - goto end; - } - if ((ifx = (struct _ifx *)malloc(sizeof(*ifx) * ifxs)) == NULL) { - errno = ENOMEM; - goto end; - } - if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { - /* sysctl has set errno */ - goto end; - } - lim = buf + needed; - for (next = buf; next < lim; next += rtm->rtm_msglen) { - rtm = (struct rt_msghdr *)next; - if (rtm->rtm_version != RTM_VERSION) { - errno = EPROTONOSUPPORT; - goto end; - } - switch (rtm->rtm_type) { - case RTM_IFINFO: - ifm = (struct if_msghdr *)rtm; - ifx[ifn].if_index = ifm->ifm_index; - ifx[ifn].if_off = off; - cp = (char *)(ifm + 1); - for (i = 1; i; i <<= 1) { - if (i & ifm->ifm_addrs) { - sa = (struct sockaddr *)cp; - if (i == RTA_IFP && - sa->sa_family == AF_LINK) { - sdl = (struct sockaddr_dl *)sa; - memcpy(ifbuf + off, - sdl->sdl_data, - sdl->sdl_nlen); - off += sdl->sdl_nlen; - *(ifbuf + off) = '\0'; - off++; - } - ADVANCE(cp, sa); - } - } - if (++ifn == ifxs) { - /* we need more memory */ - struct _ifx *newifx; - - ifxs *= 2; - if ((newifx = (struct _ifx *)malloc(sizeof(*newifx) * ifxs)) == NULL) { - errno = ENOMEM; - goto end; - } - - /* copy and free old data */ - memcpy(newifx, ifx, (sizeof(*ifx) * ifxs) / 2); - free(ifx); - ifx = newifx; - } - } - } - hlen = sizeof(struct if_nameindex) * (ifn + 1); - if ((cp = (char *)malloc(hlen + off)) == NULL) { - errno = ENOMEM; - goto end; - } - bcopy(ifbuf, cp + hlen, off); - ret = (struct if_nameindex *)cp; - for (i = 0; i < ifn; i++) { - ret[i].if_index = ifx[i].if_index; - ret[i].if_name = cp + hlen + ifx[i].if_off; - } - ret[ifn].if_index = 0; - ret[ifn].if_name = NULL; - - end: - if (buf) free(buf); - if (ifbuf) free(ifbuf); - if (ifx) free(ifx); - - return ret; -} - -void if_freenameindex(ptr) - struct if_nameindex *ptr; -{ - free(ptr); -} |
