diff options
Diffstat (limited to 'lib/libc/net/getnetnamadr.c')
| -rw-r--r-- | lib/libc/net/getnetnamadr.c | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/lib/libc/net/getnetnamadr.c b/lib/libc/net/getnetnamadr.c new file mode 100644 index 0000000..cb5871b --- /dev/null +++ b/lib/libc/net/getnetnamadr.c @@ -0,0 +1,190 @@ +/*- + * 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 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 <ctype.h> +#include <errno.h> +#include <string.h> + +#ifndef _PATH_NETCONF +#define _PATH_NETCONF "/etc/host.conf" +#endif + +enum service_type { + SERVICE_NONE = 0, + SERVICE_BIND, + SERVICE_TABLE, + SERVICE_NIS }; +#define SERVICE_MAX SERVICE_NIS + +static struct { + const char *name; + enum service_type type; +} service_names[] = { + { "hosts", SERVICE_TABLE }, + { "/etc/hosts", SERVICE_TABLE }, + { "hosttable", SERVICE_TABLE }, + { "htable", SERVICE_TABLE }, + { "bind", SERVICE_BIND }, + { "dns", SERVICE_BIND }, + { "domain", SERVICE_BIND }, + { "yp", SERVICE_NIS }, + { "yellowpages", SERVICE_NIS }, + { "nis", SERVICE_NIS }, + { 0, SERVICE_NONE } +}; + +static enum service_type service_order[SERVICE_MAX + 1]; +static int service_done = 0; + +static enum service_type +get_service_name(const char *name) { + int i; + for(i = 0; service_names[i].type != SERVICE_NONE; i++) { + if(!strcasecmp(name, service_names[i].name)) { + return service_names[i].type; + } + } + return SERVICE_NONE; +} + +static void +init_services() +{ + char *cp, *p, buf[BUFSIZ]; + register int cc = 0; + FILE *fd; + + if ((fd = (FILE *)fopen(_PATH_NETCONF, "r")) == NULL) { + /* make some assumptions */ + service_order[0] = SERVICE_TABLE; + service_order[1] = SERVICE_NONE; + } else { + while (fgets(buf, BUFSIZ, fd) != NULL && cc < SERVICE_MAX) { + if(buf[0] == '#') + continue; + + p = buf; + while ((cp = strsep(&p, "\n \t,:;")) != NULL && *cp == '\0') + ; + if (cp == NULL) + continue; + do { + if (isalpha((unsigned char)cp[0])) { + service_order[cc] = get_service_name(cp); + if(service_order[cc] != SERVICE_NONE) + cc++; + } + while ((cp = strsep(&p, "\n \t,:;")) != NULL && *cp == '\0') + ; + } while(cp != NULL && cc < SERVICE_MAX); + } + service_order[cc] = SERVICE_NONE; + fclose(fd); + } + service_done = 1; +} + +struct netent * +getnetbyname(const char *name) +{ + struct netent *hp = 0; + int nserv = 0; + + if (!service_done) + init_services(); + + while (!hp) { + switch (service_order[nserv]) { + case SERVICE_NONE: + return NULL; + case SERVICE_TABLE: + hp = _getnetbyhtname(name); + break; + case SERVICE_BIND: + hp = _getnetbydnsname(name); + break; + case SERVICE_NIS: + hp = _getnetbynisname(name); + break; + } + nserv++; + } + return hp; +} + +struct netent * +getnetbyaddr(addr, af) + u_long addr; + int af; +{ + struct netent *hp = 0; + int nserv = 0; + + if (!service_done) + init_services(); + + while (!hp) { + switch (service_order[nserv]) { + case SERVICE_NONE: + return 0; + case SERVICE_TABLE: + hp = _getnetbyhtaddr(addr, af); + break; + case SERVICE_BIND: + hp = _getnetbydnsaddr(addr, af); + break; + case SERVICE_NIS: + hp = _getnetbynisaddr(addr, af); + break; + } + nserv++; + } + return hp; +} + +void +setnetent(stayopen) + int stayopen; +{ + _setnethtent(stayopen); + _setnetdnsent(stayopen); +} + +void +endnetent() +{ + _endnethtent(); + _endnetdnsent(); +} |
