diff options
Diffstat (limited to 'lib/libc/net/getnetbynis.c')
| -rw-r--r-- | lib/libc/net/getnetbynis.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/lib/libc/net/getnetbynis.c b/lib/libc/net/getnetbynis.c new file mode 100644 index 0000000..0ab7073 --- /dev/null +++ b/lib/libc/net/getnetbynis.c @@ -0,0 +1,177 @@ +/*- + * Copyright (c) 1994, Garrett Wollman + * + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE 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 REGENTS 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. + */ + +#if defined(LIBC_SCCS) && !defined(lint) +static char sccsid[] = "@(#)$FreeBSD$"; +static char rcsid[] = "$FreeBSD$"; +#endif /* LIBC_SCCS and not lint */ + +#include <sys/param.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <arpa/inet.h> +#include <netdb.h> +#include <stdio.h> +#include <stdlib.h> +#include <ctype.h> +#include <errno.h> +#include <string.h> +#include <arpa/nameser.h> +#ifdef YP +#include <rpc/rpc.h> +#include <rpcsvc/yp_prot.h> +#include <rpcsvc/ypclnt.h> +#endif + +#define MAXALIASES 35 +#define MAXADDRS 35 + +#ifdef YP +static char *host_aliases[MAXALIASES]; +#endif /* YP */ + +static struct netent * +_getnetbynis(name, map, af) + const char *name; + char *map; + int af; +{ +#ifdef YP + register char *cp, **q; + static char *result; + int resultlen; + static struct netent h; + static char *domain = (char *)NULL; + static char ypbuf[YPMAXRECORD + 2]; + + switch(af) { + case AF_INET: + break; + default: + case AF_INET6: + errno = EAFNOSUPPORT; + return NULL; + } + + if (domain == (char *)NULL) + if (yp_get_default_domain (&domain)) + return (NULL); + + if (yp_match(domain, map, name, strlen(name), &result, &resultlen)) + return (NULL); + + bcopy((char *)result, (char *)&ypbuf, resultlen); + ypbuf[resultlen] = '\0'; + free(result); + result = (char *)&ypbuf; + + if ((cp = index(result, '\n'))) + *cp = '\0'; + + cp = strpbrk(result, " \t"); + *cp++ = '\0'; + h.n_name = result; + + while (*cp == ' ' || *cp == '\t') + cp++; + + h.n_net = inet_network(cp); + h.n_addrtype = AF_INET; + + q = h.n_aliases = host_aliases; + cp = strpbrk(cp, " \t"); + if (cp != NULL) + *cp++ = '\0'; + while (cp && *cp) { + if (*cp == ' ' || *cp == '\t') { + cp++; + continue; + } + if (q < &host_aliases[MAXALIASES - 1]) + *q++ = cp; + cp = strpbrk(cp, " \t"); + if (cp != NULL) + *cp++ = '\0'; + } + *q = NULL; + return (&h); +#else + return (NULL); +#endif +} + +struct netent * +_getnetbynisname(name) + const char *name; +{ + return _getnetbynis(name, "networks.byname", AF_INET); +} + +struct netent * +_getnetbynisaddr(addr, af) + unsigned long addr; + int af; +{ + char *str, *cp; + unsigned long net2; + int nn; + unsigned int netbr[4]; + char buf[MAXDNAME]; + + if (af != AF_INET) { + errno = EAFNOSUPPORT; + return (NULL); + } + + for (nn = 4, net2 = addr; net2; net2 >>= 8) { + netbr[--nn] = net2 & 0xff; + } + + switch (nn) { + case 3: /* Class A */ + sprintf(buf, "%u", netbr[3]); + break; + case 2: /* Class B */ + sprintf(buf, "%u.%u", netbr[2], netbr[3]); + break; + case 1: /* Class C */ + sprintf(buf, "%u.%u.%u", netbr[1], netbr[2], netbr[3]); + break; + case 0: /* Class D - E */ + sprintf(buf, "%u.%u.%u.%u", netbr[0], netbr[1], + netbr[2], netbr[3]); + break; + } + + str = (char *)&buf; + cp = str + (strlen(str) - 2); + + while(!strcmp(cp, ".0")) { + *cp = '\0'; + cp = str + (strlen(str) - 2); + } + + return _getnetbynis(str, "networks.byaddr", af); +} |
