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-rw-r--r--src/global/msg_stats_scan.c86
1 files changed, 86 insertions, 0 deletions
diff --git a/src/global/msg_stats_scan.c b/src/global/msg_stats_scan.c
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+/*++
+/* NAME
+/* msg_stats_scan
+/* SUMMARY
+/* read MSG_STATS from stream
+/* SYNOPSIS
+/* #include <msg_stats.h>
+/*
+/* int msg_stats_scan(scan_fn, stream, flags, ptr)
+/* ATTR_SCAN_MASTER_FN scan_fn;
+/* VSTREAM *stream;
+/* int flags;
+/* void *ptr;
+/* DESCRIPTION
+/* msg_stats_scan() reads an MSG_STATS from the named stream
+/* using the specified attribute scan routine. msg_stats_scan()
+/* is meant to be passed as a call-back to attr_scan(), thusly:
+/*
+/* ... RECV_ATTR_FUNC(msg_stats_scan, (void *) &stats), ...
+/* DIAGNOSTICS
+/* Fatal: out of memory.
+/* 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 <attr.h>
+#include <vstring.h>
+#include <msg.h>
+
+/* Global library. */
+
+#include <mail_proto.h>
+#include <msg_stats.h>
+
+ /*
+ * SLMs.
+ */
+#define STR(x) vstring_str(x)
+#define LEN(x) VSTRING_LEN(x)
+
+/* msg_stats_scan - read MSG_STATS from stream */
+
+int msg_stats_scan(ATTR_SCAN_MASTER_FN scan_fn, VSTREAM *fp,
+ int flags, void *ptr)
+{
+ MSG_STATS *stats = (MSG_STATS *) ptr;
+ VSTRING *buf = vstring_alloc(sizeof(MSG_STATS) * 2);
+ int ret;
+
+ /*
+ * Receive the entire structure. This is not only simpler but also likely
+ * to be quicker than having the sender figure out what fields need to be
+ * sent, converting those numbers to string and back, and having the
+ * receiver initialize the unused fields by hand.
+ *
+ * XXX Would be nice if VSTRINGs could import a fixed-size buffer and
+ * gracefully reject attempts to extend it.
+ */
+ ret = scan_fn(fp, flags | ATTR_FLAG_MORE,
+ RECV_ATTR_DATA(MAIL_ATTR_TIME, buf),
+ ATTR_TYPE_END);
+ if (ret == 1) {
+ if (LEN(buf) == sizeof(*stats)) {
+ memcpy((void *) stats, STR(buf), sizeof(*stats));
+ } else {
+ msg_warn("msg_stats_scan: size mis-match: %u != %u",
+ (unsigned) LEN(buf), (unsigned) sizeof(*stats));
+ ret = (-1);
+ }
+ }
+ vstring_free(buf);
+ return (ret);
+}