1/*++ 2/* NAME 3/* msg_stats_scan 4/* SUMMARY 5/* read MSG_STATS from stream 6/* SYNOPSIS 7/* #include <msg_stats.h> 8/* 9/* int msg_stats_scan(scan_fn, stream, flags, ptr) 10/* ATTR_SCAN_MASTER_FN scan_fn; 11/* VSTREAM *stream; 12/* int flags; 13/* void *ptr; 14/* DESCRIPTION 15/* msg_stats_scan() reads an MSG_STATS from the named stream 16/* using the specified attribute scan routine. msg_stats_scan() 17/* is meant to be passed as a call-back to attr_scan(), thusly: 18/* 19/* ... ATTR_SCAN_FUNC, msg_stats_scan, (void *) &stats, ... 20/* DIAGNOSTICS 21/* Fatal: out of memory. 22/* LICENSE 23/* .ad 24/* .fi 25/* The Secure Mailer license must be distributed with this software. 26/* AUTHOR(S) 27/* Wietse Venema 28/* IBM T.J. Watson Research 29/* P.O. Box 704 30/* Yorktown Heights, NY 10598, USA 31/*--*/ 32 33/* System library. */ 34 35#include <sys_defs.h> 36 37/* Utility library. */ 38 39#include <attr.h> 40#include <vstring.h> 41#include <msg.h> 42 43/* Global library. */ 44 45#include <mail_proto.h> 46#include <msg_stats.h> 47 48 /* 49 * SLMs. 50 */ 51#define STR(x) vstring_str(x) 52#define LEN(x) VSTRING_LEN(x) 53 54/* msg_stats_scan - read MSG_STATS from stream */ 55 56int msg_stats_scan(ATTR_SCAN_MASTER_FN scan_fn, VSTREAM *fp, 57 int flags, void *ptr) 58{ 59 MSG_STATS *stats = (MSG_STATS *) ptr; 60 VSTRING *buf = vstring_alloc(sizeof(MSG_STATS) * 2); 61 int ret; 62 63 /* 64 * Receive the entire structure. This is not only simpler but also likely 65 * to be quicker than having the sender figure out what fields need to be 66 * sent, converting those numbers to string and back, and having the 67 * receiver initialize the unused fields by hand. 68 * 69 * XXX Would be nice if VSTRINGs could import a fixed-size buffer and 70 * gracefully reject attempts to extend it. 71 */ 72 ret = scan_fn(fp, flags | ATTR_FLAG_MORE, 73 ATTR_TYPE_DATA, MAIL_ATTR_TIME, buf, 74 ATTR_TYPE_END); 75 if (ret == 1) { 76 if (LEN(buf) == sizeof(*stats)) { 77 memcpy((char *) stats, STR(buf), sizeof(*stats)); 78 } else { 79 msg_warn("msg_stats_scan: size mis-match: %u != %u", 80 (unsigned) LEN(buf), (unsigned) sizeof(*stats)); 81 ret = (-1); 82 } 83 } 84 vstring_free(buf); 85 return (ret); 86} 87