/*++ /* 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: /* /* ... ATTR_SCAN_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, ATTR_TYPE_DATA, MAIL_ATTR_TIME, buf, ATTR_TYPE_END); if (ret == 1) { if (LEN(buf) == sizeof(*stats)) { memcpy((char *) 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); }