Adding upstream version 3.4.23.upstream/3.4.23upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 173 insertions, 0 deletions

diff --git a/src/util/sock_addr.c b/src/util/sock_addr.c
new file mode 100644
index 0000000..dc5c4b1
--- /dev/null
+++ b/src/util/sock_addr.c
@@ -0,0 +1,173 @@
+/*++
+/* NAME
+/*	sock_addr 3
+/* SUMMARY
+/*	sockaddr utilities
+/* SYNOPSIS
+/*	#include <sock_addr.h>
+/*
+/*	int	sock_addr_cmp_addr(sa, sb)
+/*	const struct sockaddr *sa;
+/*	const struct sockaddr *sb;
+/*
+/*	int	sock_addr_cmp_port(sa, sb)
+/*	const struct sockaddr *sa;
+/*	const struct sockaddr *sb;
+/*
+/*	int	SOCK_ADDR_EQ_ADDR(sa, sb)
+/*	const struct sockaddr *sa;
+/*	const struct sockaddr *sb;
+/*
+/*	int	SOCK_ADDR_EQ_PORT(sa, sb)
+/*	const struct sockaddr *sa;
+/*	const struct sockaddr *sb;
+/*
+/*	int	sock_addr_in_loopback(sa)
+/*	const struct sockaddr *sa;
+/* AUXILIARY MACROS
+/*	struct sockaddr *SOCK_ADDR_PTR(ptr)
+/*	unsigned char SOCK_ADDR_FAMILY(ptr)
+/*	unsigned char SOCK_ADDR_LEN(ptr)
+/*	unsigned short SOCK_ADDR_PORT(ptr)
+/*	unsigned short *SOCK_ADDR_PORTP(ptr)
+/*
+/*	struct sockaddr_in *SOCK_ADDR_IN_PTR(ptr)
+/*	unsigned char SOCK_ADDR_IN_FAMILY(ptr)
+/*	unsigned short SOCK_ADDR_IN_PORT(ptr)
+/*	struct in_addr SOCK_ADDR_IN_ADDR(ptr)
+/*	struct in_addr IN_ADDR(ptr)
+/*
+/*	struct sockaddr_in6 *SOCK_ADDR_IN6_PTR(ptr)
+/*	unsigned char SOCK_ADDR_IN6_FAMILY(ptr)
+/*	unsigned short SOCK_ADDR_IN6_PORT(ptr)
+/*	struct in6_addr SOCK_ADDR_IN6_ADDR(ptr)
+/*	struct in6_addr IN6_ADDR(ptr)
+/* DESCRIPTION
+/*	These utilities take protocol-independent address structures
+/*	and perform protocol-dependent operations on structure members.
+/*	Some of the macros described here are called unsafe,
+/*	because they evaluate one or more arguments multiple times.
+/*
+/*	sock_addr_cmp_addr() or sock_addr_cmp_port() compare the
+/*	address family and network address or port fields for
+/*	equality, and return indication of the difference between
+/*	their arguments:  < 0 if the first argument is "smaller",
+/*	0 for equality, and > 0 if the first argument is "larger".
+/*
+/*	The unsafe macros SOCK_ADDR_EQ_ADDR() or SOCK_ADDR_EQ_PORT()
+/*	compare compare the address family and network address or
+/*	port fields for equality, and return non-zero when their
+/*	arguments differ.
+/*
+/*	sock_addr_in_loopback() determines if the argument specifies
+/*	a loopback address.
+/*
+/*	The SOCK_ADDR_PTR() macro casts a generic pointer to (struct
+/*	sockaddr *).  The name is upper case for consistency not
+/*	safety.  SOCK_ADDR_FAMILY() and SOCK_ADDR_LEN() return the
+/*	address family and length of the real structure that hides
+/*	inside a generic sockaddr structure. On systems where struct
+/*	sockaddr has no sa_len member, SOCK_ADDR_LEN() cannot be
+/*	used as lvalue. SOCK_ADDR_PORT() returns the IPv4 or IPv6
+/*	port number, in network byte order; it must not be used as
+/*	lvalue. SOCK_ADDR_PORTP() returns a pointer to the same.
+/*
+/*	The macros SOCK_ADDR_IN{,6}_{PTR,FAMILY,PORT,ADDR}() cast
+/*	a generic pointer to a specific socket address structure
+/*	pointer, or access a specific socket address structure
+/*	member. These can be used as lvalues.
+/*
+/*	The unsafe INADDR() and IN6_ADDR() macros dereference a
+/*	generic pointer to a specific address structure.
+/* DIAGNOSTICS
+/*	Panic: unsupported address family.
+/* LICENSE
+/* .ad
+/* .fi
+/*	The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/*	Wietse Venema
+/*	IBM T.J. Watson Research
+/*	P.O. Box 704
+/*	Yorktown Heights, NY 10598, USA
+/*--*/
+
+/* System library. */
+
+#include <sys_defs.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <string.h>
+
+/* Utility library. */
+
+#include <msg.h>
+#include <sock_addr.h>
+
+/* sock_addr_cmp_addr - compare addresses for equality */
+
+int     sock_addr_cmp_addr(const struct sockaddr *sa,
+			           const struct sockaddr *sb)
+{
+    if (sa->sa_family != sb->sa_family)
+	return (sa->sa_family - sb->sa_family);
+
+    /*
+     * With IPv6 address structures, assume a non-hostile implementation that
+     * stores the address as a contiguous sequence of bits. Any holes in the
+     * sequence would invalidate the use of memcmp().
+     */
+    if (sa->sa_family == AF_INET) {
+	return (SOCK_ADDR_IN_ADDR(sa).s_addr - SOCK_ADDR_IN_ADDR(sb).s_addr);
+#ifdef HAS_IPV6
+    } else if (sa->sa_family == AF_INET6) {
+	return (memcmp((void *) &(SOCK_ADDR_IN6_ADDR(sa)),
+		       (void *) &(SOCK_ADDR_IN6_ADDR(sb)),
+		       sizeof(SOCK_ADDR_IN6_ADDR(sa))));
+#endif
+    } else {
+	msg_panic("sock_addr_cmp_addr: unsupported address family %d",
+		  sa->sa_family);
+    }
+}
+
+/* sock_addr_cmp_port - compare ports for equality */
+
+int     sock_addr_cmp_port(const struct sockaddr *sa,
+			           const struct sockaddr *sb)
+{
+    if (sa->sa_family != sb->sa_family)
+	return (sa->sa_family - sb->sa_family);
+
+    if (sa->sa_family == AF_INET) {
+	return (SOCK_ADDR_IN_PORT(sa) - SOCK_ADDR_IN_PORT(sb));
+#ifdef HAS_IPV6
+    } else if (sa->sa_family == AF_INET6) {
+	return (SOCK_ADDR_IN6_PORT(sa) - SOCK_ADDR_IN6_PORT(sb));
+#endif
+    } else {
+	msg_panic("sock_addr_cmp_port: unsupported address family %d",
+		  sa->sa_family);
+    }
+}
+
+/* sock_addr_in_loopback - determine if address is loopback */
+
+int     sock_addr_in_loopback(const struct sockaddr *sa)
+{
+    unsigned long inaddr;
+
+    if (sa->sa_family == AF_INET) {
+	inaddr = ntohl(SOCK_ADDR_IN_ADDR(sa).s_addr);
+	return (IN_CLASSA(inaddr)
+		&& ((inaddr & IN_CLASSA_NET) >> IN_CLASSA_NSHIFT)
+		== IN_LOOPBACKNET);
+#ifdef HAS_IPV6
+    } else if (sa->sa_family == AF_INET6) {
+	return (IN6_IS_ADDR_LOOPBACK(&SOCK_ADDR_IN6_ADDR(sa)));
+#endif
+    } else {
+	msg_panic("sock_addr_in_loopback: unsupported address family %d",
+		  sa->sa_family);
+    }
+}