Adding upstream version 3.4.23.upstream/3.4.23upstream

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

1 files changed, 170 insertions, 0 deletions

diff --git a/src/local/resolve.c b/src/local/resolve.c
new file mode 100644
index 0000000..a6aa9d0
--- /dev/null
+++ b/src/local/resolve.c
@@ -0,0 +1,170 @@
+/*++
+/* NAME
+/*	resolve 3
+/* SUMMARY
+/*	resolve recipient and deliver locally or remotely
+/* SYNOPSIS
+/*	#include "local.h"
+/*
+/*	int	deliver_resolve_tree(state, usr_attr, addr)
+/*	LOCAL_STATE state;
+/*	USER_ATTR usr_attr;
+/*	TOK822	*addr;
+/*
+/*	int	deliver_resolve_addr(state, usr_attr, addr)
+/*	LOCAL_STATE state;
+/*	USER_ATTR usr_attr;
+/*	char	*addr;
+/* DESCRIPTION
+/*	deliver_resolve_XXX() resolves a recipient that is the result from
+/*	e.g., alias expansion, and delivers locally or via forwarding.
+/*
+/*	Arguments:
+/* .IP state
+/*	The attributes that specify the message, sender and more.
+/*	A table with the results from expanding aliases or lists.
+/*	A table with delivered-to: addresses taken from the message.
+/* .IP addr
+/*	An address from, e.g., alias expansion.
+/* DIAGNOSTICS
+/*	Fatal errors: out of memory. The result is non-zero when the
+/*	operation should be tried again. Warnings: malformed address.
+/* SEE ALSO
+/*	recipient(3) local delivery
+/*	indirect(3) deliver via forwarding
+/* 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 <unistd.h>
+#include <string.h>
+
+/* Utility library. */
+
+#include <msg.h>
+#include <vstring.h>
+#include <htable.h>
+
+/* Global library. */
+
+#include <mail_proto.h>
+#include <resolve_clnt.h>
+#include <rewrite_clnt.h>
+#include <tok822.h>
+#include <mail_params.h>
+#include <defer.h>
+
+/* Application-specific. */
+
+#include "local.h"
+
+/* deliver_resolve_addr - resolve and deliver */
+
+int     deliver_resolve_addr(LOCAL_STATE state, USER_ATTR usr_attr, char *addr)
+{
+    TOK822 *tree;
+    int     result;
+
+    tree = tok822_scan_addr(addr);
+    result = deliver_resolve_tree(state, usr_attr, tree);
+    tok822_free_tree(tree);
+    return (result);
+}
+
+/* deliver_resolve_tree - resolve and deliver */
+
+int     deliver_resolve_tree(LOCAL_STATE state, USER_ATTR usr_attr, TOK822 *addr)
+{
+    const char *myname = "deliver_resolve_tree";
+    RESOLVE_REPLY reply;
+    int     status;
+    ssize_t ext_len;
+    char   *ratsign;
+    int     rcpt_delim;
+
+    /*
+     * Make verbose logging easier to understand.
+     */
+    state.level++;
+    if (msg_verbose)
+	MSG_LOG_STATE(myname, state);
+
+    /*
+     * Initialize.
+     */
+    resolve_clnt_init(&reply);
+
+    /*
+     * Rewrite the address to canonical form, just like the cleanup service
+     * does. Then, resolve the address to (transport, nexhop, recipient),
+     * just like the queue manager does. The only part missing here is the
+     * virtual address substitution. Message forwarding fixes most of that.
+     */
+    tok822_rewrite(addr, REWRITE_CANON);
+    tok822_resolve(addr, &reply);
+
+    /*
+     * First, a healthy portion of error handling.
+     */
+    if (reply.flags & RESOLVE_FLAG_FAIL) {
+	dsb_simple(state.msg_attr.why, "4.3.0", "address resolver failure");
+	status = defer_append(BOUNCE_FLAGS(state.request),
+			      BOUNCE_ATTR(state.msg_attr));
+    } else if (reply.flags & RESOLVE_FLAG_ERROR) {
+	dsb_simple(state.msg_attr.why, "5.1.3",
+		   "bad recipient address syntax: %s", STR(reply.recipient));
+	status = bounce_append(BOUNCE_FLAGS(state.request),
+			       BOUNCE_ATTR(state.msg_attr));
+    } else {
+
+	/*
+	 * Splice in the optional unmatched address extension.
+	 */
+	if (state.msg_attr.unmatched) {
+	    rcpt_delim = state.msg_attr.local[strlen(state.msg_attr.user)];
+	    if ((ratsign = strrchr(STR(reply.recipient), '@')) == 0) {
+		VSTRING_ADDCH(reply.recipient, rcpt_delim);
+		vstring_strcat(reply.recipient, state.msg_attr.unmatched);
+	    } else {
+		ext_len = strlen(state.msg_attr.unmatched);
+		VSTRING_SPACE(reply.recipient, ext_len + 2);
+		if ((ratsign = strrchr(STR(reply.recipient), '@')) == 0)
+		    msg_panic("%s: recipient @ botch", myname);
+		memmove(ratsign + ext_len + 1, ratsign, strlen(ratsign) + 1);
+		*ratsign = rcpt_delim;
+		memcpy(ratsign + 1, state.msg_attr.unmatched, ext_len);
+		VSTRING_SKIP(reply.recipient);
+	    }
+	}
+	state.msg_attr.rcpt.address = STR(reply.recipient);
+
+	/*
+	 * Delivery to a local or non-local address. For a while there was
+	 * some ugly code to force local recursive alias expansions on a host
+	 * with no authority over the local domain, but that code was just
+	 * too unclean.
+	 */
+	if (strcmp(state.msg_attr.relay, STR(reply.transport)) == 0) {
+	    status = deliver_recipient(state, usr_attr);
+	} else {
+	    status = deliver_indirect(state);
+	}
+    }
+
+    /*
+     * Cleanup.
+     */
+    resolve_clnt_free(&reply);
+
+    return (status);
+}