Add some missing network functionality; grabbed from libc-5.3.12.

libc/inet/Makefile

@@ -33,16 +33,17 @@ MSRC2=resolv.c
 MOBJ2=encodeh.o decodeh.o encoded.o decoded.o lengthd.o encodeq.o \
 	decodeq.o lengthq.o encodea.o decodea.o encodep.o decodep.o \
 	formquery.o dnslookup.o resolveaddress.o resolvemailbox.o \
-	opennameservers.o closenameservers.o resolvename.o gethostbyname.o \
-	gethostbyaddr.o res_init.o res_query.o getnetbyname.o \
-	read_etc_hosts.o get_hosts_byname.o get_hosts_byaddr.o
+	opennameservers.o closenameservers.o resolvename.o gethostbyname.o\
+	gethostbyaddr.o get_hosts_byname.o get_hosts_byaddr.o read_etc_hosts.o
 
 MSRC3=socketcalls.c
 MOBJ3= accept.o bind.o connect.o getpeername.o getsockname.o getsockopt.o \
 	listen.o recv.o recvfrom.o recvmsg.o send.o sendmsg.o sendto.o \
 	setsockopt.o shutdown.o socket.o socketpair.o 
 
-CSRC =getservice.c getproto.c hostid.c
+CSRC =getservice.c getproto.c hostid.c getnetent.c getnetbynm.c getnetbyad.c \
+	herror.c inet_net.c
+
 COBJS=$(patsubst %.c,%.o, $(CSRC))
 
 OBJS=$(MOBJ) $(MOBJ2) $(MOBJ3) $(COBJS)

libc/inet/getnetbyad.c

@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 1983 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#include <netdb.h>
+
+extern int _net_stayopen;
+
+struct netent *
+getnetbyaddr(net, type)
+	register long net;
+	register int type;
+{
+	register struct netent *p;
+
+	setnetent(_net_stayopen);
+	while ((p = getnetent()))
+		if (p->n_addrtype == type && p->n_net == net)
+			break;
+	if (!_net_stayopen)
+		endnetent();
+	return (p);
+}

libc/inet/getnetbynm.c

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 1983 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#include <netdb.h>
+#include <string.h>
+
+extern int _net_stayopen;
+
+struct netent *
+getnetbyname(const char *name)
+{
+	register struct netent *p;
+	register char **cp;
+
+	setnetent(_net_stayopen);
+	while ((p = getnetent())) {
+		if (strcmp(p->n_name, name) == 0)
+			break;
+		for (cp = p->n_aliases; *cp != 0; cp++)
+			if (strcmp(*cp, name) == 0)
+				goto found;
+	}
+found:
+	if (!_net_stayopen)
+		endnetent();
+	return (p);
+}

libc/inet/getnetent.c

@@ -0,0 +1,116 @@
+/*
+ * Copyright (c) 1983 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#include <stdio.h>
+#include <netdb.h>
+#include <arpa/inet.h>
+
+#define	MAXALIASES	35
+
+static const char NETDB[] = _PATH_NETWORKS;
+static FILE *netf = NULL;
+static char line[BUFSIZ+1];
+static struct netent net;
+static char *net_aliases[MAXALIASES];
+static char *any(char *, char *);
+
+int _net_stayopen;
+
+void
+setnetent(f)
+	int f;
+{
+	if (netf == NULL)
+		netf = fopen(NETDB, "r" );
+	else
+		rewind(netf);
+	_net_stayopen |= f;
+}
+
+void
+endnetent()
+{
+	if (netf) {
+		fclose(netf);
+		netf = NULL;
+	}
+	_net_stayopen = 0;
+}
+
+struct netent *
+getnetent()
+{
+	char *p;
+	register char *cp, **q;
+
+	if (netf == NULL && (netf = fopen(NETDB, "r" )) == NULL)
+		return (NULL);
+again:
+	p = fgets(line, BUFSIZ, netf);
+	if (p == NULL)
+		return (NULL);
+	if (*p == '#')
+		goto again;
+	cp = any(p, "#\n");
+	if (cp == NULL)
+		goto again;
+	*cp = '\0';
+	net.n_name = p;
+	cp = any(p, " \t");
+	if (cp == NULL)
+		goto again;
+	*cp++ = '\0';
+	while (*cp == ' ' || *cp == '\t')
+		cp++;
+	p = any(cp, " \t");
+	if (p != NULL)
+		*p++ = '\0';
+	net.n_net = inet_network(cp);
+	net.n_addrtype = AF_INET;
+	q = net.n_aliases = net_aliases;
+	if (p != NULL) 
+		cp = p;
+	while (cp && *cp) {
+		if (*cp == ' ' || *cp == '\t') {
+			cp++;
+			continue;
+		}
+		if (q < &net_aliases[MAXALIASES - 1])
+			*q++ = cp;
+		cp = any(cp, " \t");
+		if (cp != NULL)
+			*cp++ = '\0';
+	}
+	*q = NULL;
+	return (&net);
+}
+
+static char *
+any(cp, match)
+	register char *cp;
+	char *match;
+{
+	register char *mp, c;
+
+	while ((c = *cp)) {
+		for (mp = match; *mp; mp++)
+			if (*mp == c)
+				return (cp);
+		cp++;
+	}
+	return ((char *)0);
+}

libc/inet/herror.c

@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 1987 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that: (1) source distributions retain this entire copyright
+ * notice and comment, and (2) distributions including binaries display
+ * the following acknowledgement:  ``This product includes software
+ * developed by the University of California, Berkeley and its contributors''
+ * in the documentation or other materials provided with the distribution
+ * and in all advertising materials mentioning features or use of this
+ * software. 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <netdb.h>
+
+static const char *const h_errlist[] = {
+	"Error 0",
+	"Unknown host",				/* 1 HOST_NOT_FOUND */
+	"Host name lookup failure",	/* 2 TRY_AGAIN */
+	"Unknown server error",		/* 3 NO_RECOVERY */
+	"No address associated with name", /* 4 NO_ADDRESS */
+};
+static const int h_nerr = { sizeof(h_errlist)/sizeof(h_errlist[0]) };
+
+/*
+ * herror -- print the error indicated by the h_errno value.
+ */
+void herror(const char *s)
+{
+	static const char colon_space[] = ": ";
+	const char *p;
+	const char *c;
+
+	c = colon_space;
+	if (!s || !*s) {
+		c += 2;
+	}
+	p = "Unknown error";
+	if ((h_errno >= 0) && (h_errno < h_nerr)) {
+	    p = h_errlist[h_errno];
+	}
+	fprintf(stderr, "%s%s%s\n", s, c, p);
+}

libc/inet/inet_net.c

@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 1983, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 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.
+ */
+
+#include <ctype.h>
+#include <netinet/in.h>
+
+/*
+ * Internet network address interpretation routine.
+ * The library routines call this routine to interpret
+ * network numbers.
+ */
+u_int32_t
+inet_network(const char *cp)
+{
+	register u_long val, base, n;
+	register char c;
+	u_long parts[4], *pp = parts;
+	register int i;
+
+again:
+	/*
+	 * Collect number up to ``.''.
+	 * Values are specified as for C:
+	 * 0x=hex, 0=octal, other=decimal.
+	 */
+	val = 0; base = 10;
+	/*
+	 * The 4.4BSD version of this file also accepts 'x__' as a hexa
+	 * number.  I don't think this is correct.  -- Uli
+	 */
+	if (*cp == '0') {
+		if (*++cp == 'x' || *cp == 'X')
+			base = 16, cp++;
+		else
+			base = 8;
+	}
+	while ((c = *cp)) {
+		if (isdigit(c)) {
+			val = (val * base) + (c - '0');
+			cp++;
+			continue;
+		}
+		if (base == 16 && isxdigit(c)) {
+			val = (val << 4) + (c + 10 - (islower(c) ? 'a' : 'A'));
+			cp++;
+			continue;
+		}
+		break;
+	}
+	if (*cp == '.') {
+		if (pp >= parts + 4)
+			return (INADDR_NONE);
+		*pp++ = val, cp++;
+		goto again;
+	}
+	if (*cp && !isspace(*cp))
+		return (INADDR_NONE);
+	*pp++ = val;
+	n = pp - parts;
+	if (n > 4)
+		return (INADDR_NONE);
+	for (val = 0, i = 0; i < n; i++) {
+		val <<= 8;
+		val |= parts[i] & 0xff;
+	}
+	return (val);
+}