diff options
Diffstat (limited to 'sysdeps/mach/hurd/if_index.c')
| -rw-r--r-- | sysdeps/mach/hurd/if_index.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/if_index.c b/sysdeps/mach/hurd/if_index.c new file mode 100644 index 0000000000..e8ee999899 --- /dev/null +++ b/sysdeps/mach/hurd/if_index.c @@ -0,0 +1,166 @@ +/* Find network interface names and index numbers. Hurd version. + Copyright (C) 2000 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <net/if.h> +#include <hurd.h> +#include <hurd/fsys.h> +#include <string.h> +#include <sys/mman.h> + +static int +map_interfaces (int domain, + unsigned int *idxp, + int (*counted_initializer) (unsigned int count, + size_t nameslen), + int (*iterator) (const char *)) +{ + static const char ifopt[] = "--interface="; + file_t server; + char optsbuf[512], *opts = optsbuf, *p; + size_t optslen = sizeof optsbuf; + error_t err; + + /* Find the socket server for DOMAIN. */ + server = _hurd_socket_server (domain, 0); + if (server == MACH_PORT_NULL) + return 0; + + err = __file_get_fs_options (server, &opts, &optslen); + if (err == MACH_SEND_INVALID_DEST || err == MIG_SERVER_DIED) + { + /* On the first use of the socket server during the operation, + allow for the old server port dying. */ + server = _hurd_socket_server (domain, 1); + if (server == MACH_PORT_NULL) + return -1; + err = __file_get_fs_options (server, &opts, &optslen); + } + if (err) + return __hurd_fail (err), 0; + + if (counted_initializer) + { + unsigned int count = 0; + size_t nameslen = 0; + p = memchr (opts, '\0', optslen); + while (p != 0) + { + char *end = memchr (p + 1, '\0', optslen - (p - opts)); + if (end == 0) + break; + if (optslen - (p - opts) >= sizeof ifopt + && !memcmp (p + 1, ifopt, sizeof ifopt - 1)) + { + size_t len = end + 1 - (p + sizeof ifopt); + nameslen += len > IFNAMSIZ+1 ? IFNAMSIZ+1 : len; + ++count; + } + p = end; + } + + if ((*counted_initializer) (count, nameslen)) + return 0; + } + + *idxp = 0; + for (p = memchr (opts, '\0', optslen); p != 0; + p = memchr (p + 1, '\0', optslen - (p - opts))) + { + ++*idxp; + if (optslen - (p - opts) >= sizeof ifopt + && !memcmp (p + 1, ifopt, sizeof ifopt - 1) + && (*iterator) (p + sizeof ifopt)) + break; + } + + if (opts != optsbuf) + __munmap (opts, optslen); + + return 1; +} + +unsigned int +if_nametoindex (const char *ifname) +{ + unsigned int idx; + int find_name (const char *name) + { + return !strcmp (name, ifname); + } + return map_interfaces (PF_INET, &idx, 0, &find_name) ? idx : 0; +} + +char * +if_indextoname (unsigned int ifindex, char *ifname) +{ + unsigned int idx; + int find_idx (const char *name) + { + if (idx == ifindex) + { + strncpy (ifname, name, IFNAMSIZ); + return 1; + } + return 0; + } + return map_interfaces (PF_INET, &idx, 0, &find_idx) ? ifname : NULL; +} + + +struct if_nameindex * +if_nameindex (void) +{ + unsigned int idx; + struct if_nameindex *buf; + char *namep; + int alloc (unsigned int count, size_t nameslen) + { + buf = malloc ((sizeof buf[0] * (count + 1)) + nameslen); + if (buf == 0) + return 1; + buf[count].if_index = 0; + buf[count].if_name = NULL; + namep = (char *) &buf[count + 1]; + return 0; + } + int fill (const char *name) + { + buf[idx - 1].if_index = idx; + buf[idx - 1].if_name = namep; + namep = __memccpy (namep, name, '\0', IFNAMSIZ+1) ?: &namep[IFNAMSIZ+1]; + return 0; + } + + return map_interfaces (PF_INET, &idx, &alloc, &fill) ? buf : NULL; +} + +void +if_freenameindex (struct if_nameindex *ifn) +{ + free (ifn); +} + + +void +internal_function +__protocol_available (int *have_inet, int *have_inet6) +{ + *have_inet = _hurd_socket_server (PF_INET, 0) != MACH_PORT_NULL; + *have_inet6 = _hurd_socket_server (PF_INET6, 0) != MACH_PORT_NULL; +} |