diff options
Diffstat (limited to 'lib/libc/net/getnetbyht.c')
| -rw-r--r-- | lib/libc/net/getnetbyht.c | 288 |
1 files changed, 288 insertions, 0 deletions
diff --git a/lib/libc/net/getnetbyht.c b/lib/libc/net/getnetbyht.c new file mode 100644 index 0000000..d2df570 --- /dev/null +++ b/lib/libc/net/getnetbyht.c @@ -0,0 +1,288 @@ +/* + * Copyright (c) 1983, 1993 + * The Regents of the University of California. 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. + * 4. Neither the name of the University 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 REGENTS 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 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. + */ + +/* Portions Copyright (c) 1993 Carlos Leandro and Rui Salgueiro + * Dep. Matematica Universidade de Coimbra, Portugal, Europe + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * from getnetent.c 1.1 (Coimbra) 93/06/02 + */ + +#if defined(LIBC_SCCS) && !defined(lint) +static char sccsid[] = "@(#)getnetent.c 8.1 (Berkeley) 6/4/93"; +static char orig_rcsid[] = "From: Id: getnetent.c,v 8.4 1997/06/01 20:34:37 vixie Exp"; +#endif /* LIBC_SCCS and not lint */ +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <arpa/inet.h> +#include <arpa/nameser.h> +#include <errno.h> +#include <netdb.h> +#include <resolv.h> +#include <stdio.h> +#include <string.h> +#include <stdarg.h> +#include <nsswitch.h> +#include "netdb_private.h" + +void +_setnethtent(int f, struct netent_data *ned) +{ + + if (ned->netf == NULL) + ned->netf = fopen(_PATH_NETWORKS, "r"); + else + rewind(ned->netf); + ned->stayopen |= f; +} + +void +_endnethtent(struct netent_data *ned) +{ + + if (ned->netf) { + fclose(ned->netf); + ned->netf = NULL; + } + ned->stayopen = 0; +} + +static int +getnetent_p(struct netent *ne, struct netent_data *ned) +{ + char *p, *bp, *ep; + char *cp, **q; + int len; + char line[BUFSIZ + 1]; + + if (ned->netf == NULL && + (ned->netf = fopen(_PATH_NETWORKS, "r")) == NULL) + return (-1); +again: + p = fgets(line, sizeof line, ned->netf); + if (p == NULL) + return (-1); + if (*p == '#') + goto again; + cp = strpbrk(p, "#\n"); + if (cp != NULL) + *cp = '\0'; + bp = ned->netbuf; + ep = ned->netbuf + sizeof ned->netbuf; + ne->n_name = bp; + cp = strpbrk(p, " \t"); + if (cp == NULL) + goto again; + *cp++ = '\0'; + len = strlen(p) + 1; + if (ep - bp < len) { + RES_SET_H_ERRNO(__res_state(), NO_RECOVERY); + return (-1); + } + strlcpy(bp, p, ep - bp); + bp += len; + while (*cp == ' ' || *cp == '\t') + cp++; + p = strpbrk(cp, " \t"); + if (p != NULL) + *p++ = '\0'; + ne->n_net = inet_network(cp); + ne->n_addrtype = AF_INET; + q = ne->n_aliases = ned->net_aliases; + if (p != NULL) { + cp = p; + 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); +} + +int +getnetent_r(struct netent *nptr, char *buffer, size_t buflen, + struct netent **result, int *h_errnop) +{ + struct netent_data *ned; + struct netent ne; + res_state statp; + + statp = __res_state(); + if ((ned = __netent_data_init()) == NULL) { + RES_SET_H_ERRNO(statp, NETDB_INTERNAL); + *h_errnop = statp->res_h_errno; + return (-1); + } + if (getnetent_p(&ne, ned) != 0) + return (-1); + if (__copy_netent(&ne, nptr, buffer, buflen) != 0) { + RES_SET_H_ERRNO(statp, NETDB_INTERNAL); + *h_errnop = statp->res_h_errno; + return ((errno != 0) ? errno : -1); + } + *result = nptr; + return (0); +} + +struct netent * +getnetent(void) +{ + struct netdata *nd; + struct netent *rval; + int ret_h_errno; + + if ((nd = __netdata_init()) == NULL) + return (NULL); + if (getnetent_r(&nd->net, nd->data, sizeof(nd->data), &rval, + &ret_h_errno) != 0) + return (NULL); + return (rval); +} + +int +_ht_getnetbyname(void *rval, void *cb_data, va_list ap) +{ + const char *name; + char *buffer; + size_t buflen; + int *errnop, *h_errnop; + struct netent *nptr, ne; + struct netent_data *ned; + char **cp; + res_state statp; + int error; + + 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); + } + + _setnethtent(ned->stayopen, ned); + while ((error = getnetent_p(&ne, ned)) == 0) { + if (strcasecmp(ne.n_name, name) == 0) + break; + for (cp = ne.n_aliases; *cp != 0; cp++) + if (strcasecmp(*cp, name) == 0) + goto found; + } +found: + if (!ned->stayopen) + _endnethtent(ned); + if (error != 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); +} + +int +_ht_getnetbyaddr(void *rval, void *cb_data, va_list ap) +{ + uint32_t net; + int type; + char *buffer; + size_t buflen; + int *errnop, *h_errnop; + struct netent *nptr, ne; + struct netent_data *ned; + res_state statp; + int error; + + net = va_arg(ap, uint32_t); + type = 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); + } + + _setnethtent(ned->stayopen, ned); + while ((error = getnetent_p(&ne, ned)) == 0) + if (ne.n_addrtype == type && ne.n_net == net) + break; + if (!ned->stayopen) + _endnethtent(ned); + if (error != 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); +} |
