1 files changed, 114 insertions, 0 deletions
diff --git a/src/smtpd/smtpd_xforward.c b/src/smtpd/smtpd_xforward.c
new file mode 100644
index 0000000..053d377
--- /dev/null
+++ b/src/smtpd/smtpd_xforward.c
@@ -0,0 +1,114 @@
+/*++
+/* NAME
+/*	smtpd_xforward 3
+/* SUMMARY
+/*	maintain XCLIENT information
+/* SYNOPSIS
+/*	#include "smtpd.h"
+/*
+/*	void	smtpd_xforward_init(state)
+/*	SMTPD_STATE *state;
+/*
+/*	void	smtpd_xforward_preset(state)
+/*	SMTPD_STATE *state;
+/*
+/*	void	smtpd_xforward_reset(state)
+/*	SMTPD_STATE *state;
+/* DESCRIPTION
+/*	smtpd_xforward_init() zeroes the attributes for storage of
+/*	XFORWARD command parameters.
+/*
+/*	smtpd_xforward_preset() takes the result from smtpd_xforward_init()
+/*	and sets all fields to the same "unknown" value that regular
+/*	client attributes would have.
+/*
+/*	smtpd_xforward_reset() restores the state from smtpd_xforward_init().
+/* 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>
+
+/* Utility library. */
+
+#include <mymalloc.h>
+#include <msg.h>
+
+/* Global library. */
+
+#include <mail_proto.h>
+
+/* Application-specific. */
+
+#include <smtpd.h>
+
+/* smtpd_xforward_init - initialize xforward attributes */
+
+void    smtpd_xforward_init(SMTPD_STATE *state)
+{
+    state->xforward.flags = 0;
+    state->xforward.name = 0;
+    state->xforward.addr = 0;
+    state->xforward.port = 0;
+    state->xforward.namaddr = 0;
+    state->xforward.protocol = 0;
+    state->xforward.helo_name = 0;
+    state->xforward.ident = 0;
+    state->xforward.domain = 0;
+}
+
+/* smtpd_xforward_preset - set xforward attributes to "unknown" */
+
+void    smtpd_xforward_preset(SMTPD_STATE *state)
+{
+
+    /*
+     * Sanity checks.
+     */
+    if (state->xforward.flags)
+	msg_panic("smtpd_xforward_preset: bad flags: 0x%x",
+		  state->xforward.flags);
+
+    /*
+     * This is a temporary solution. Unknown forwarded attributes get the
+     * same values as unknown normal attributes, so that we don't break
+     * assumptions in pre-existing code.
+     */
+    state->xforward.flags = SMTPD_STATE_XFORWARD_INIT;
+    state->xforward.name = mystrdup(CLIENT_NAME_UNKNOWN);
+    state->xforward.addr = mystrdup(CLIENT_ADDR_UNKNOWN);
+    state->xforward.port = mystrdup(CLIENT_PORT_UNKNOWN);
+    state->xforward.namaddr = mystrdup(CLIENT_NAMADDR_UNKNOWN);
+    state->xforward.rfc_addr = mystrdup(CLIENT_ADDR_UNKNOWN);
+    /* Leave helo at zero. */
+    state->xforward.protocol = mystrdup(CLIENT_PROTO_UNKNOWN);
+    /* Leave ident at zero. */
+    /* Leave domain context at zero. */
+}
+
+/* smtpd_xforward_reset - reset xforward attributes */
+
+void    smtpd_xforward_reset(SMTPD_STATE *state)
+{
+#define FREE_AND_WIPE(s) { if (s) myfree(s); s = 0; }
+
+    state->xforward.flags = 0;
+    FREE_AND_WIPE(state->xforward.name);
+    FREE_AND_WIPE(state->xforward.addr);
+    FREE_AND_WIPE(state->xforward.port);
+    FREE_AND_WIPE(state->xforward.namaddr);
+    FREE_AND_WIPE(state->xforward.rfc_addr);
+    FREE_AND_WIPE(state->xforward.protocol);
+    FREE_AND_WIPE(state->xforward.helo_name);
+    FREE_AND_WIPE(state->xforward.ident);
+    FREE_AND_WIPE(state->xforward.domain);
+}