diff options
Diffstat (limited to 'lib/libc/net/getnetbynis.c')
| -rw-r--r-- | lib/libc/net/getnetbynis.c | 259 |
1 files changed, 259 insertions, 0 deletions
diff --git a/lib/libc/net/getnetbynis.c b/lib/libc/net/getnetbynis.c new file mode 100644 index 0000000..811e431 --- /dev/null +++ b/lib/libc/net/getnetbynis.c @@ -0,0 +1,259 @@ +/*- + * 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. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <arpa/inet.h> +#include <netdb.h> +#include <resolv.h> +#include <stdio.h> +#include <stdlib.h> +#include <ctype.h> +#include <errno.h> +#include <string.h> +#include <stdarg.h> +#include <nsswitch.h> +#include <arpa/nameser.h> +#ifdef YP +#include <rpc/rpc.h> +#include <rpcsvc/yp_prot.h> +#include <rpcsvc/ypclnt.h> +#endif +#include "netdb_private.h" + +#ifdef YP +static int +_getnetbynis(const char *name, char *map, int af, struct netent *ne, + struct netent_data *ned) +{ + char *p, *bp, *ep; + char *cp, **q; + char *result; + int resultlen, len; + char ypbuf[YPMAXRECORD + 2]; + + switch(af) { + case AF_INET: + break; + default: + case AF_INET6: + errno = EAFNOSUPPORT; + return (-1); + } + + if (ned->yp_domain == (char *)NULL) + if (yp_get_default_domain (&ned->yp_domain)) + return (-1); + + if (yp_match(ned->yp_domain, map, name, strlen(name), &result, + &resultlen)) + return (-1); + + 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'; + bp = ned->netbuf; + ep = ned->netbuf + sizeof ned->netbuf; + len = strlen(result) + 1; + if (ep - bp < len) { + RES_SET_H_ERRNO(__res_state(), NO_RECOVERY); + return (-1); + } + strlcpy(bp, result, ep - bp); + ne->n_name = bp; + bp += len; + + while (*cp == ' ' || *cp == '\t') + cp++; + + ne->n_net = inet_network(cp); + ne->n_addrtype = AF_INET; + + q = ne->n_aliases = ned->net_aliases; + cp = strpbrk(cp, " \t"); + if (cp != NULL) + *cp++ = '\0'; + while (cp && *cp) { + if (*cp == ' ' || *cp == '\t') { + cp++; + continue; + } + if (q > &ned->net_aliases[_MAXALIASES - 1]) + break; + p = strpbrk(cp, " \t"); + if (p != NULL) + *p++ = '\0'; + len = strlen(cp) + 1; + if (ep - bp < len) + break; + strlcpy(bp, cp, ep - bp); + *q++ = bp; + bp += len; + cp = p; + } + *q = NULL; + return (0); +} +#endif /* YP */ + +int +_nis_getnetbyname(void *rval, void *cb_data, va_list ap) +{ +#ifdef YP + const char *name; + char *buffer; + size_t buflen; + int *errnop, *h_errnop; + struct netent *nptr, ne; + struct netent_data *ned; + res_state statp; + + name = va_arg(ap, const char *); + nptr = va_arg(ap, struct netent *); + buffer = va_arg(ap, char *); + buflen = va_arg(ap, size_t); + errnop = va_arg(ap, int *); + h_errnop = va_arg(ap, int *); + + statp = __res_state(); + if ((ned = __netent_data_init()) == NULL) { + RES_SET_H_ERRNO(statp, NETDB_INTERNAL); + *h_errnop = statp->res_h_errno; + return (NS_UNAVAIL); + } + + if (_getnetbynis(name, "networks.byname", AF_INET, &ne, ned) != 0) { + *h_errnop = statp->res_h_errno; + return (NS_NOTFOUND); + } + if (__copy_netent(&ne, nptr, buffer, buflen) != 0) { + *errnop = errno; + RES_SET_H_ERRNO(statp, NETDB_INTERNAL); + *h_errnop = statp->res_h_errno; + return (NS_RETURN); + } + *((struct netent **)rval) = nptr; + return (NS_SUCCESS); +#else + return (NS_UNAVAIL); +#endif + +} + +int +_nis_getnetbyaddr(void *rval, void *cb_data, va_list ap) +{ +#ifdef YP + uint32_t addr; + int af; + char *buffer; + size_t buflen; + int *errnop, *h_errnop; + struct netent *nptr, ne; + struct netent_data *ned; + char *str, *cp; + uint32_t net2; + int nn; + unsigned int netbr[4]; + char buf[MAXDNAME]; + res_state statp; + + addr = va_arg(ap, uint32_t); + af = va_arg(ap, int); + nptr = va_arg(ap, struct netent *); + buffer = va_arg(ap, char *); + buflen = va_arg(ap, size_t); + errnop = va_arg(ap, int *); + h_errnop = va_arg(ap, int *); + + statp = __res_state(); + if ((ned = __netent_data_init()) == NULL) { + RES_SET_H_ERRNO(statp, NETDB_INTERNAL); + *h_errnop = statp->res_h_errno; + return (NS_UNAVAIL); + } + + if (af != AF_INET) { + RES_SET_H_ERRNO(statp, NETDB_INTERNAL); + *h_errnop = statp->res_h_errno; + errno = EAFNOSUPPORT; + return (NS_UNAVAIL); + } + + 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); + } + + if (_getnetbynis(str, "networks.byaddr", af, &ne, ned) != 0) { + *h_errnop = statp->res_h_errno; + return (NS_NOTFOUND); + } + if (__copy_netent(&ne, nptr, buffer, buflen) != 0) { + *errnop = errno; + RES_SET_H_ERRNO(statp, NETDB_INTERNAL); + *h_errnop = statp->res_h_errno; + return (NS_RETURN); + } + *((struct netent **)rval) = nptr; + return (NS_SUCCESS); +#else + return (NS_UNAVAIL); +#endif /* YP */ +} |
