Adding upstream version 3.5.24.upstream/3.5.24

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

1 files changed, 315 insertions, 0 deletions

diff --git a/src/global/own_inet_addr.c b/src/global/own_inet_addr.c
new file mode 100644
index 0000000..d164a20
--- /dev/null
+++ b/src/global/own_inet_addr.c
@@ -0,0 +1,315 @@
+/*++
+/* NAME
+/*	own_inet_addr 3
+/* SUMMARY
+/*	determine if IP address belongs to this mail system instance
+/* SYNOPSIS
+/*	#include <own_inet_addr.h>
+/*
+/*	int	own_inet_addr(addr)
+/*	struct sockaddr *addr;
+/*
+/*	INET_ADDR_LIST *own_inet_addr_list()
+/*
+/*	INET_ADDR_LIST *own_inet_mask_list()
+/*
+/*	int	proxy_inet_addr(addr)
+/*	struct in_addr *addr;
+/*
+/*	INET_ADDR_LIST *proxy_inet_addr_list()
+/* DESCRIPTION
+/*	own_inet_addr() determines if the specified IP address belongs
+/*	to this mail system instance, i.e. if this mail system instance
+/*	is supposed to be listening on this specific IP address.
+/*
+/*	own_inet_addr_list() returns the list of all addresses that
+/*	belong to this mail system instance.
+/*
+/*	own_inet_mask_list() returns the list of all corresponding
+/*	netmasks.
+/*
+/*	proxy_inet_addr() determines if the specified IP address is
+/*	listed with the proxy_interfaces configuration parameter.
+/*
+/*	proxy_inet_addr_list() returns the list of all addresses that
+/*	belong to proxy network interfaces.
+/* 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>
+
+/* Utility library. */
+
+#include <msg.h>
+#include <mymalloc.h>
+#include <inet_addr_list.h>
+#include <inet_addr_local.h>
+#include <inet_addr_host.h>
+#include <stringops.h>
+#include <myaddrinfo.h>
+#include <sock_addr.h>
+#include <inet_proto.h>
+
+/* Global library. */
+
+#include <mail_params.h>
+#include <own_inet_addr.h>
+
+/* Application-specific. */
+
+static INET_ADDR_LIST saved_addr_list;
+static INET_ADDR_LIST saved_mask_list;
+static INET_ADDR_LIST saved_proxy_list;
+
+/* own_inet_addr_init - initialize my own address list */
+
+static void own_inet_addr_init(INET_ADDR_LIST *addr_list,
+			               INET_ADDR_LIST *mask_list)
+{
+    INET_ADDR_LIST local_addrs;
+    INET_ADDR_LIST local_masks;
+    char   *hosts;
+    char   *host;
+    const char *sep = " \t,";
+    char   *bufp;
+    int     nvirtual;
+    int     nlocal;
+    MAI_HOSTADDR_STR hostaddr;
+    struct sockaddr_storage *sa;
+    struct sockaddr_storage *ma;
+
+    inet_addr_list_init(addr_list);
+    inet_addr_list_init(mask_list);
+
+    /*
+     * Avoid run-time errors when all network protocols are disabled. We
+     * can't look up interface information, and we can't convert explicit
+     * names or addresses.
+     */
+    if (inet_proto_info()->ai_family_list[0] == 0) {
+	if (msg_verbose)
+	    msg_info("skipping %s setting - "
+		     "all network protocols are disabled",
+		     VAR_INET_INTERFACES);
+	return;
+    }
+
+    /*
+     * If we are listening on all interfaces (default), ask the system what
+     * the interfaces are.
+     */
+    if (strcmp(var_inet_interfaces, INET_INTERFACES_ALL) == 0) {
+	if (inet_addr_local(addr_list, mask_list,
+			    inet_proto_info()->ai_family_list) == 0)
+	    msg_fatal("could not find any active network interfaces");
+    }
+
+    /*
+     * Select all loopback interfaces from the system's available interface
+     * list.
+     */
+    else if (strcmp(var_inet_interfaces, INET_INTERFACES_LOCAL) == 0) {
+	inet_addr_list_init(&local_addrs);
+	inet_addr_list_init(&local_masks);
+	if (inet_addr_local(&local_addrs, &local_masks,
+			    inet_proto_info()->ai_family_list) == 0)
+	    msg_fatal("could not find any active network interfaces");
+	for (sa = local_addrs.addrs, ma = local_masks.addrs;
+	     sa < local_addrs.addrs + local_addrs.used; sa++, ma++) {
+	    if (sock_addr_in_loopback(SOCK_ADDR_PTR(sa))) {
+		inet_addr_list_append(addr_list, SOCK_ADDR_PTR(sa));
+		inet_addr_list_append(mask_list, SOCK_ADDR_PTR(ma));
+	    }
+	}
+	inet_addr_list_free(&local_addrs);
+	inet_addr_list_free(&local_masks);
+    }
+
+    /*
+     * If we are supposed to be listening only on specific interface
+     * addresses (virtual hosting), look up the addresses of those
+     * interfaces.
+     */
+    else {
+	bufp = hosts = mystrdup(var_inet_interfaces);
+	while ((host = mystrtok(&bufp, sep)) != 0)
+	    if (inet_addr_host(addr_list, host) == 0)
+		msg_fatal("config variable %s: host not found: %s",
+			  VAR_INET_INTERFACES, host);
+	myfree(hosts);
+
+	/*
+	 * Weed out duplicate IP addresses. Duplicates happen when the same
+	 * IP address is listed under multiple hostnames. If we don't weed
+	 * out duplicates, Postfix can suddenly stop working after the DNS is
+	 * changed.
+	 */
+	inet_addr_list_uniq(addr_list);
+
+	/*
+	 * Find out the netmask for each virtual interface, by looking it up
+	 * among all the local interfaces.
+	 */
+	inet_addr_list_init(&local_addrs);
+	inet_addr_list_init(&local_masks);
+	if (inet_addr_local(&local_addrs, &local_masks,
+			    inet_proto_info()->ai_family_list) == 0)
+	    msg_fatal("could not find any active network interfaces");
+	for (nvirtual = 0; nvirtual < addr_list->used; nvirtual++) {
+	    for (nlocal = 0; /* see below */ ; nlocal++) {
+		if (nlocal >= local_addrs.used) {
+		    SOCKADDR_TO_HOSTADDR(
+				 SOCK_ADDR_PTR(addr_list->addrs + nvirtual),
+				 SOCK_ADDR_LEN(addr_list->addrs + nvirtual),
+				      &hostaddr, (MAI_SERVPORT_STR *) 0, 0);
+		    msg_fatal("parameter %s: no local interface found for %s",
+			      VAR_INET_INTERFACES, hostaddr.buf);
+		}
+		if (SOCK_ADDR_EQ_ADDR(addr_list->addrs + nvirtual,
+				      local_addrs.addrs + nlocal)) {
+		    inet_addr_list_append(mask_list,
+				 SOCK_ADDR_PTR(local_masks.addrs + nlocal));
+		    break;
+		}
+	    }
+	}
+	inet_addr_list_free(&local_addrs);
+	inet_addr_list_free(&local_masks);
+    }
+}
+
+/* own_inet_addr - is this my own internet address */
+
+int     own_inet_addr(struct sockaddr * addr)
+{
+    int     i;
+
+    if (saved_addr_list.used == 0)
+	own_inet_addr_init(&saved_addr_list, &saved_mask_list);
+
+    for (i = 0; i < saved_addr_list.used; i++)
+	if (SOCK_ADDR_EQ_ADDR(addr, saved_addr_list.addrs + i))
+	    return (1);
+    return (0);
+}
+
+/* own_inet_addr_list - return list of addresses */
+
+INET_ADDR_LIST *own_inet_addr_list(void)
+{
+    if (saved_addr_list.used == 0)
+	own_inet_addr_init(&saved_addr_list, &saved_mask_list);
+
+    return (&saved_addr_list);
+}
+
+/* own_inet_mask_list - return list of addresses */
+
+INET_ADDR_LIST *own_inet_mask_list(void)
+{
+    if (saved_addr_list.used == 0)
+	own_inet_addr_init(&saved_addr_list, &saved_mask_list);
+
+    return (&saved_mask_list);
+}
+
+/* proxy_inet_addr_init - initialize my proxy interface list */
+
+static void proxy_inet_addr_init(INET_ADDR_LIST *addr_list)
+{
+    char   *hosts;
+    char   *host;
+    const char *sep = " \t,";
+    char   *bufp;
+
+    /*
+     * Parse the proxy_interfaces parameter, and expand any symbolic
+     * hostnames into IP addresses.
+     */
+    inet_addr_list_init(addr_list);
+    bufp = hosts = mystrdup(var_proxy_interfaces);
+    while ((host = mystrtok(&bufp, sep)) != 0)
+	if (inet_addr_host(addr_list, host) == 0)
+	    msg_fatal("config variable %s: host not found: %s",
+		      VAR_PROXY_INTERFACES, host);
+    myfree(hosts);
+
+    /*
+     * Weed out duplicate IP addresses.
+     */
+    inet_addr_list_uniq(addr_list);
+}
+
+/* proxy_inet_addr - is this my proxy internet address */
+
+int     proxy_inet_addr(struct sockaddr * addr)
+{
+    int     i;
+
+    if (*var_proxy_interfaces == 0)
+	return (0);
+
+    if (saved_proxy_list.used == 0)
+	proxy_inet_addr_init(&saved_proxy_list);
+
+    for (i = 0; i < saved_proxy_list.used; i++)
+	if (SOCK_ADDR_EQ_ADDR(addr, saved_proxy_list.addrs + i))
+	    return (1);
+    return (0);
+}
+
+/* proxy_inet_addr_list - return list of addresses */
+
+INET_ADDR_LIST *proxy_inet_addr_list(void)
+{
+    if (*var_proxy_interfaces != 0 && saved_proxy_list.used == 0)
+	proxy_inet_addr_init(&saved_proxy_list);
+
+    return (&saved_proxy_list);
+}
+
+#ifdef TEST
+#include <inet_proto.h>
+
+static void inet_addr_list_print(INET_ADDR_LIST *list)
+{
+    MAI_HOSTADDR_STR hostaddr;
+    struct sockaddr_storage *sa;
+
+    for (sa = list->addrs; sa < list->addrs + list->used; sa++) {
+	SOCKADDR_TO_HOSTADDR(SOCK_ADDR_PTR(sa), SOCK_ADDR_LEN(sa),
+			     &hostaddr, (MAI_SERVPORT_STR *) 0, 0);
+	msg_info("%s", hostaddr.buf);
+    }
+}
+
+char   *var_inet_interfaces;
+
+int     main(int argc, char **argv)
+{
+    INET_PROTO_INFO *proto_info;
+    INET_ADDR_LIST *list;
+
+    if (argc != 3)
+	msg_fatal("usage: %s protocols interface_list (e.g. \"all all\")",
+		  argv[0]);
+    msg_verbose = 10;
+    proto_info = inet_proto_init(argv[0], argv[1]);
+    var_inet_interfaces = argv[2];
+    list = own_inet_addr_list();
+    inet_addr_list_print(list);
+    return (0);
+}
+
+#endif