Adding upstream version 3.4.23.upstream/3.4.23upstream

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

1 files changed, 152 insertions, 0 deletions

diff --git a/src/global/valid_mailhost_addr.c b/src/global/valid_mailhost_addr.c
new file mode 100644
index 0000000..79a7900
--- /dev/null
+++ b/src/global/valid_mailhost_addr.c
@@ -0,0 +1,152 @@
+/*++
+/* NAME
+/*	valid_mailhost_addr 3
+/* SUMMARY
+/*	mailhost address syntax validation
+/* SYNOPSIS
+/*	#include <valid_mailhost_addr.h>
+/*
+/*	const char *valid_mailhost_addr(name, gripe)
+/*	const char *name;
+/*	int	gripe;
+/*
+/*	int	valid_mailhost_literal(addr, gripe)
+/*	const char *addr;
+/*	int	gripe;
+/* DESCRIPTION
+/*	valid_mailhost_addr() requires that the input is a valid
+/*	RFC 2821 string representation of an IPv4 or IPv6 network
+/*	address.  A valid IPv4 address is in dotted quad decimal
+/*	form.  A valid IPv6 address includes the "IPV6:" prefix as
+/*	required by RFC 2821, and is in valid hexadecimal form or
+/*	in valid IPv4-in-IPv6 form.  The result value is the bare
+/*	address in the input argument (i.e. text after "IPV6:"
+/*	prefix, if any) in case of success, a null pointer in case
+/*	of failure.
+/*
+/*	valid_mailhost_literal() requires an address enclosed in
+/*	[].  The result is non-zero in case of success, zero in
+/*	case of failure.
+/*
+/*	These routines operate silently unless the gripe parameter
+/*	specifies a non-zero value. The macros DO_GRIPE and DONT_GRIPE
+/*	provide suitable constants.
+/*
+/*	The IPV6_COL macro defines the "IPv6:" prefix.
+/* DIAGNOSTICS
+/*	Warnings are logged with msg_warn().
+/* SEE ALSO
+/*	valid_hostname(3)
+/*	RFC 952, RFC 1123, RFC 1035, RFC 2821
+/* 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 <string.h>
+
+#ifdef STRCASECMP_IN_STRINGS_H
+#include <strings.h>
+#endif
+
+/* Utility library. */
+
+#include <msg.h>
+#include <myaddrinfo.h>
+
+/* Global library. */
+
+#include <valid_mailhost_addr.h>
+
+/* Application-specific. */
+
+#define IPV6_COL_LEN       (sizeof(IPV6_COL) - 1)
+#define HAS_IPV6_COL(str)  (strncasecmp((str), IPV6_COL, IPV6_COL_LEN) == 0)
+#define SKIP_IPV6_COL(str) (HAS_IPV6_COL(str) ? (str) + IPV6_COL_LEN : (str))
+
+/* valid_mailhost_addr - validate RFC 2821 numerical address form */
+
+const char *valid_mailhost_addr(const char *addr, int gripe)
+{
+    const char *bare_addr;
+
+    bare_addr = SKIP_IPV6_COL(addr);
+    return ((bare_addr != addr ? valid_ipv6_hostaddr : valid_ipv4_hostaddr)
+	    (bare_addr, gripe) ? bare_addr : 0);
+}
+
+/* valid_mailhost_literal - validate [RFC 2821 numerical address] form */
+
+int     valid_mailhost_literal(const char *addr, int gripe)
+{
+    const char *myname = "valid_mailhost_literal";
+    MAI_HOSTADDR_STR hostaddr;
+    const char *last;
+    size_t address_bytes;
+
+    if (*addr != '[') {
+	if (gripe)
+	    msg_warn("%s: '[' expected at start: %.100s", myname, addr);
+	return (0);
+    }
+    if ((last = strchr(addr, ']')) == 0) {
+	if (gripe)
+	    msg_warn("%s: ']' expected at end: %.100s", myname, addr);
+	return (0);
+    }
+    if (last[1]) {
+	if (gripe)
+	    msg_warn("%s: unexpected text after ']': %.100s", myname, addr);
+	return (0);
+    }
+    if ((address_bytes = last - addr - 1) >= sizeof(hostaddr.buf)) {
+	if (gripe)
+	    msg_warn("%s: too much text: %.100s", myname, addr);
+	return (0);
+    }
+    strncpy(hostaddr.buf, addr + 1, address_bytes);
+    hostaddr.buf[address_bytes] = 0;
+    return (valid_mailhost_addr(hostaddr.buf, gripe) != 0);
+}
+
+#ifdef TEST
+
+ /*
+  * Test program - reads hostnames from stdin, reports invalid hostnames to
+  * stderr.
+  */
+#include <stdlib.h>
+
+#include <vstring.h>
+#include <vstream.h>
+#include <vstring_vstream.h>
+#include <msg_vstream.h>
+
+int     main(int unused_argc, char **argv)
+{
+    VSTRING *buffer = vstring_alloc(1);
+
+    msg_vstream_init(argv[0], VSTREAM_ERR);
+    msg_verbose = 1;
+
+    while (vstring_fgets_nonl(buffer, VSTREAM_IN)) {
+	msg_info("testing: \"%s\"", vstring_str(buffer));
+	if (vstring_str(buffer)[0] == '[')
+	    valid_mailhost_literal(vstring_str(buffer), DO_GRIPE);
+	else
+	    valid_mailhost_addr(vstring_str(buffer), DO_GRIPE);
+    }
+    exit(0);
+}
+
+#endif