diff options
author | Chris Johns <chrisj@rtems.org> | 2023-04-18 16:08:04 +1000 |
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committer | Chris Johns <chrisj@rtems.org> | 2023-04-20 15:27:18 +1000 |
commit | 6b9c8b4e8d9d1fa603c54b146e8a6f51fe5ff79f (patch) | |
tree | 27ddb73ab5d5b13b7c6a27d1cf64a748da42769b /net | |
parent | d22fbcb0412e309850c0f49ab61bc410184b9b5c (diff) |
bsd: Add getaddrinfom, gai_strerror, ipv6_addr, if_nametoindex and BSD programs
- These additions let the net services repo build with the legacy
stack
Diffstat (limited to 'net')
-rw-r--r-- | net/if_nametoindex.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/net/if_nametoindex.c b/net/if_nametoindex.c new file mode 100644 index 0000000..2966078 --- /dev/null +++ b/net/if_nametoindex.c @@ -0,0 +1,111 @@ +/* $KAME: if_nametoindex.c,v 1.6 2000/11/24 08:18:54 itojun Exp $ */ + +/*- + * SPDX-License-Identifier: BSD-1-Clause + * + * Copyright (c) 1997, 2000 + * Berkeley Software Design, Inc. 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. + * + * THIS SOFTWARE IS PROVIDED BY Berkeley Software Design, Inc. ``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 Berkeley Software Design, Inc. 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. + * + * BSDI Id: if_nametoindex.c,v 2.3 2000/04/17 22:38:05 dab Exp + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#ifndef __rtems__ +#include "namespace.h" +#endif /* __rtems__ */ +#include <sys/types.h> +#include <sys/socket.h> +#include <sys/sockio.h> +#include <net/if.h> +#include <net/if_dl.h> +#include <ifaddrs.h> +#include <stdlib.h> +#include <string.h> +#include <errno.h> +#include <unistd.h> +#ifndef __rtems__ +#include "un-namespace.h" +#else /* __rtems__ */ +#define _socket socket +#define _ioctl ioctl +#define _close close +#define LLINDEX(s) ((s)->sdl_index) +#endif /* __rtems__ */ + +/* + * From RFC 2553: + * + * 4.1 Name-to-Index + * + * + * The first function maps an interface name into its corresponding + * index. + * + * #include <net/if.h> + * + * unsigned int if_nametoindex(const char *ifname); + * + * If the specified interface name does not exist, the return value is + * 0, and errno is set to ENXIO. If there was a system error (such as + * running out of memory), the return value is 0 and errno is set to the + * proper value (e.g., ENOMEM). + */ + +unsigned int +if_nametoindex(const char *ifname) +{ + int s; + struct ifreq ifr; + struct ifaddrs *ifaddrs, *ifa; + unsigned int ni; + + s = _socket(AF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0); + if (s != -1) { + memset(&ifr, 0, sizeof(ifr)); + strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); + if (_ioctl(s, SIOCGIFINDEX, &ifr) != -1) { + _close(s); + return (ifr.ifr_index); + } + _close(s); + } + + if (getifaddrs(&ifaddrs) < 0) + return(0); + + ni = 0; + + for (ifa = ifaddrs; ifa != NULL; ifa = ifa->ifa_next) { + if (ifa->ifa_addr && + ifa->ifa_addr->sa_family == AF_LINK && + strcmp(ifa->ifa_name, ifname) == 0) { + ni = LLINDEX((struct sockaddr_dl*)ifa->ifa_addr); + break; + } + } + + freeifaddrs(ifaddrs); + if (!ni) + errno = ENXIO; + return(ni); +} |