pktlength: rework code to use tables
This commit is contained in:
Miroslav Lichvar
parent
070f2706b7
commit
0a9d75bfb8
1 changed files with 124 additions and 299 deletions
423
pktlength.c
423
pktlength.c
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@ -33,147 +33,118 @@
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#include "util.h"
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#include "pktlength.h"
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#define PADDING_LENGTH_(request_length, reply_length) \
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((request_length) < (reply_length) ? (reply_length) - (request_length) : 0)
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#define PADDING_LENGTH(request_data, reply_data) \
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PADDING_LENGTH_(offsetof(CMD_Request, request_data), offsetof(CMD_Reply, reply_data))
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#define REQ_LENGTH_ENTRY(request_data_field, reply_data_field) \
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{ offsetof(CMD_Request, data.request_data_field.EOR), \
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PADDING_LENGTH(data.request_data_field.EOR, data.reply_data_field.EOR) }
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#define RPY_LENGTH_ENTRY(reply_data_field) \
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offsetof(CMD_Reply, data.reply_data_field.EOR)
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/* ================================================== */
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static int
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command_unpadded_length(CMD_Request *r)
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{
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int type;
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type = ntohs(r->command);
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if (type < 0 || type >= N_REQUEST_TYPES) {
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return 0;
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} else {
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switch (type) {
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case REQ_NULL:
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return offsetof(CMD_Request, data.null.EOR);
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case REQ_ONLINE:
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return offsetof(CMD_Request, data.online.EOR);
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case REQ_OFFLINE:
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return offsetof(CMD_Request, data.offline.EOR);
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case REQ_BURST:
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return offsetof(CMD_Request, data.burst.EOR);
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case REQ_MODIFY_MINPOLL:
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return offsetof(CMD_Request, data.modify_minpoll.EOR);
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case REQ_MODIFY_MAXPOLL:
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return offsetof(CMD_Request, data.modify_maxpoll.EOR);
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case REQ_DUMP:
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return offsetof(CMD_Request, data.dump.EOR);
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case REQ_MODIFY_MAXDELAY:
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return offsetof(CMD_Request, data.modify_maxdelay.EOR);
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case REQ_MODIFY_MAXDELAYRATIO:
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return offsetof(CMD_Request, data.modify_maxdelayratio.EOR);
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case REQ_MODIFY_MAXDELAYDEVRATIO:
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return offsetof(CMD_Request, data.modify_maxdelaydevratio.EOR);
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case REQ_MODIFY_MAXUPDATESKEW:
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return offsetof(CMD_Request, data.modify_maxupdateskew.EOR);
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case REQ_MODIFY_MAKESTEP:
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return offsetof(CMD_Request, data.modify_makestep.EOR);
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case REQ_LOGON :
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return offsetof(CMD_Request, data.logon.EOR);
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case REQ_SETTIME :
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return offsetof(CMD_Request, data.settime.EOR);
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case REQ_LOCAL :
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return offsetof(CMD_Request, data.local.EOR);
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case REQ_MANUAL :
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return offsetof(CMD_Request, data.manual.EOR);
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case REQ_N_SOURCES :
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return offsetof(CMD_Request, data.null.EOR);
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case REQ_SOURCE_DATA :
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return offsetof(CMD_Request, data.source_data.EOR);
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case REQ_REKEY :
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return offsetof(CMD_Request, data.null.EOR);
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case REQ_ALLOW :
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return offsetof(CMD_Request, data.allow_deny.EOR);
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case REQ_ALLOWALL :
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return offsetof(CMD_Request, data.allow_deny.EOR);
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case REQ_DENY :
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return offsetof(CMD_Request, data.allow_deny.EOR);
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case REQ_DENYALL :
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return offsetof(CMD_Request, data.allow_deny.EOR);
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case REQ_CMDALLOW :
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return offsetof(CMD_Request, data.allow_deny.EOR);
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case REQ_CMDALLOWALL :
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return offsetof(CMD_Request, data.allow_deny.EOR);
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case REQ_CMDDENY :
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return offsetof(CMD_Request, data.allow_deny.EOR);
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case REQ_CMDDENYALL :
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return offsetof(CMD_Request, data.allow_deny.EOR);
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case REQ_ACCHECK :
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return offsetof(CMD_Request, data.ac_check.EOR);
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case REQ_CMDACCHECK :
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return offsetof(CMD_Request, data.ac_check.EOR);
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case REQ_ADD_SERVER :
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return offsetof(CMD_Request, data.ntp_source.EOR);
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case REQ_ADD_PEER :
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return offsetof(CMD_Request, data.ntp_source.EOR);
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case REQ_DEL_SOURCE :
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return offsetof(CMD_Request, data.del_source.EOR);
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case REQ_WRITERTC :
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return offsetof(CMD_Request, data.null.EOR);
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case REQ_DFREQ :
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return offsetof(CMD_Request, data.dfreq.EOR);
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case REQ_DOFFSET :
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return offsetof(CMD_Request, data.doffset.EOR);
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case REQ_TRACKING :
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return offsetof(CMD_Request, data.null.EOR);
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case REQ_SOURCESTATS :
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return offsetof(CMD_Request, data.sourcestats.EOR);
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case REQ_RTCREPORT :
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return offsetof(CMD_Request, data.null.EOR);
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case REQ_TRIMRTC :
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return offsetof(CMD_Request, data.null.EOR);
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case REQ_CYCLELOGS :
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return offsetof(CMD_Request, data.null.EOR);
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case REQ_SUBNETS_ACCESSED :
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case REQ_CLIENT_ACCESSES:
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/* No longer supported */
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return 0;
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case REQ_CLIENT_ACCESSES_BY_INDEX:
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return offsetof(CMD_Request, data.client_accesses_by_index.EOR);
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case REQ_MANUAL_LIST:
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return offsetof(CMD_Request, data.null.EOR);
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case REQ_MANUAL_DELETE:
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return offsetof(CMD_Request, data.manual_delete.EOR);
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case REQ_MAKESTEP:
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return offsetof(CMD_Request, data.null.EOR);
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case REQ_ACTIVITY:
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return offsetof(CMD_Request, data.null.EOR);
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case REQ_RESELECT:
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return offsetof(CMD_Request, data.null.EOR);
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case REQ_RESELECTDISTANCE:
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return offsetof(CMD_Request, data.reselect_distance.EOR);
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case REQ_MODIFY_MINSTRATUM:
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return offsetof(CMD_Request, data.modify_minstratum.EOR);
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case REQ_MODIFY_POLLTARGET:
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return offsetof(CMD_Request, data.modify_polltarget.EOR);
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case REQ_SMOOTHING:
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return offsetof(CMD_Request, data.null.EOR);
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case REQ_SMOOTHTIME:
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return offsetof(CMD_Request, data.smoothtime.EOR);
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case REQ_REFRESH:
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return offsetof(CMD_Request, data.null.EOR);
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case REQ_SERVER_STATS:
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return offsetof(CMD_Request, data.null.EOR);
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default:
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/* If we fall through the switch, it most likely means we've forgotten to implement a new case */
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assert(0);
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}
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}
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struct request_length {
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uint16_t command;
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uint16_t padding;
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};
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/* Catch-all case */
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return 0;
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}
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static const struct request_length request_lengths[] = {
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REQ_LENGTH_ENTRY(null, null), /* NULL */
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REQ_LENGTH_ENTRY(online, null), /* ONLINE */
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REQ_LENGTH_ENTRY(offline, null), /* OFFLINE */
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REQ_LENGTH_ENTRY(burst, null), /* BURST */
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REQ_LENGTH_ENTRY(modify_minpoll, null), /* MODIFY_MINPOLL */
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REQ_LENGTH_ENTRY(modify_maxpoll, null), /* MODIFY_MAXPOLL */
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REQ_LENGTH_ENTRY(dump, null), /* DUMP */
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REQ_LENGTH_ENTRY(modify_maxdelay, null), /* MODIFY_MAXDELAY */
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REQ_LENGTH_ENTRY(modify_maxdelayratio, null), /* MODIFY_MAXDELAYRATIO */
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REQ_LENGTH_ENTRY(modify_maxupdateskew, null), /* MODIFY_MAXUPDATESKEW */
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REQ_LENGTH_ENTRY(logon, null), /* LOGON */
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REQ_LENGTH_ENTRY(settime, manual_timestamp), /* SETTIME */
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REQ_LENGTH_ENTRY(local, null), /* LOCAL */
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REQ_LENGTH_ENTRY(manual, null), /* MANUAL */
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REQ_LENGTH_ENTRY(null, n_sources), /* N_SOURCES */
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REQ_LENGTH_ENTRY(source_data, source_data), /* SOURCE_DATA */
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REQ_LENGTH_ENTRY(null, null), /* REKEY */
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REQ_LENGTH_ENTRY(allow_deny, null), /* ALLOW */
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REQ_LENGTH_ENTRY(allow_deny, null), /* ALLOWALL */
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REQ_LENGTH_ENTRY(allow_deny, null), /* DENY */
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REQ_LENGTH_ENTRY(allow_deny, null), /* DENYALL */
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REQ_LENGTH_ENTRY(allow_deny, null), /* CMDALLOW */
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REQ_LENGTH_ENTRY(allow_deny, null), /* CMDALLOWALL */
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REQ_LENGTH_ENTRY(allow_deny, null), /* CMDDENY */
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REQ_LENGTH_ENTRY(allow_deny, null), /* CMDDENYALL */
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REQ_LENGTH_ENTRY(ac_check, null), /* ACCHECK */
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REQ_LENGTH_ENTRY(ac_check, null), /* CMDACCHECK */
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REQ_LENGTH_ENTRY(ntp_source, null), /* ADD_SERVER */
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REQ_LENGTH_ENTRY(ntp_source, null), /* ADD_PEER */
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REQ_LENGTH_ENTRY(del_source, null), /* DEL_SOURCE */
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REQ_LENGTH_ENTRY(null, null), /* WRITERTC */
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REQ_LENGTH_ENTRY(dfreq, null), /* DFREQ */
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REQ_LENGTH_ENTRY(doffset, null), /* DOFFSET */
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REQ_LENGTH_ENTRY(null, tracking), /* TRACKING */
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REQ_LENGTH_ENTRY(sourcestats, sourcestats), /* SOURCESTATS */
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REQ_LENGTH_ENTRY(null, rtc), /* RTCREPORT */
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REQ_LENGTH_ENTRY(null, null), /* TRIMRTC */
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REQ_LENGTH_ENTRY(null, null), /* CYCLELOGS */
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{ 0, 0 }, /* SUBNETS_ACCESSED - not supported */
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{ 0, 0 }, /* CLIENT_ACCESSES - not supported */
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REQ_LENGTH_ENTRY(client_accesses_by_index,
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client_accesses_by_index), /* CLIENT_ACCESSES_BY_INDEX */
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REQ_LENGTH_ENTRY(null, manual_list), /* MANUAL_LIST */
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REQ_LENGTH_ENTRY(manual_delete, null), /* MANUAL_DELETE */
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REQ_LENGTH_ENTRY(null, null), /* MAKESTEP */
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REQ_LENGTH_ENTRY(null, activity), /* ACTIVITY */
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REQ_LENGTH_ENTRY(modify_minstratum, null), /* MODIFY_MINSTRATUM */
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REQ_LENGTH_ENTRY(modify_polltarget, null), /* MODIFY_POLLTARGET */
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REQ_LENGTH_ENTRY(modify_maxdelaydevratio, null), /* MODIFY_MAXDELAYDEVRATIO */
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REQ_LENGTH_ENTRY(null, null), /* RESELECT */
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REQ_LENGTH_ENTRY(reselect_distance, null), /* RESELECTDISTANCE */
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REQ_LENGTH_ENTRY(modify_makestep, null), /* MODIFY_MAKESTEP */
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REQ_LENGTH_ENTRY(null, smoothing), /* SMOOTHING */
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REQ_LENGTH_ENTRY(smoothtime, null), /* SMOOTHTIME */
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REQ_LENGTH_ENTRY(null, null), /* REFRESH */
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REQ_LENGTH_ENTRY(null, server_stats), /* SERVER_STATS */
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};
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static const uint16_t reply_lengths[] = {
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0, /* empty slot */
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RPY_LENGTH_ENTRY(null), /* NULL */
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RPY_LENGTH_ENTRY(n_sources), /* N_SOURCES */
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RPY_LENGTH_ENTRY(source_data), /* SOURCE_DATA */
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RPY_LENGTH_ENTRY(manual_timestamp), /* MANUAL_TIMESTAMP */
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RPY_LENGTH_ENTRY(tracking), /* TRACKING */
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RPY_LENGTH_ENTRY(sourcestats), /* SOURCESTATS */
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RPY_LENGTH_ENTRY(rtc), /* RTC */
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0, /* SUBNETS_ACCESSED - not supported */
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0, /* CLIENT_ACCESSES - not supported */
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RPY_LENGTH_ENTRY(client_accesses_by_index), /* CLIENT_ACCESSES_BY_INDEX */
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0, /* MANUAL_LIST - variable length */
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RPY_LENGTH_ENTRY(activity), /* ACTIVITY */
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RPY_LENGTH_ENTRY(smoothing), /* SMOOTHING */
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RPY_LENGTH_ENTRY(server_stats), /* SERVER_STATS */
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};
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/* ================================================== */
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int
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PKL_CommandLength(CMD_Request *r)
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{
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uint32_t type;
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int command_length;
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command_length = command_unpadded_length(r);
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assert(sizeof (request_lengths) / sizeof (request_lengths[0]) == N_REQUEST_TYPES);
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type = ntohs(r->command);
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if (type >= N_REQUEST_TYPES)
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return 0;
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command_length = request_lengths[type].command;
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if (!command_length)
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return 0;
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@ -182,141 +153,20 @@ PKL_CommandLength(CMD_Request *r)
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/* ================================================== */
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#define PADDING_LENGTH_(request_length, reply_length) \
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((request_length) < (reply_length) ? (reply_length) - (request_length) : 0)
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#define PADDING_LENGTH(request_data, reply_data) \
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PADDING_LENGTH_(offsetof(CMD_Request, request_data), offsetof(CMD_Reply, reply_data))
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int
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PKL_CommandPaddingLength(CMD_Request *r)
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{
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int type;
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uint32_t type;
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if (r->version < PROTO_VERSION_PADDING)
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return 0;
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type = ntohs(r->command);
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if (type < 0 || type >= N_REQUEST_TYPES)
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if (type >= N_REQUEST_TYPES)
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return 0;
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switch (type) {
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case REQ_NULL:
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return PADDING_LENGTH(data, data.null.EOR);
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case REQ_ONLINE:
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return PADDING_LENGTH(data.online.EOR, data.null.EOR);
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case REQ_OFFLINE:
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return PADDING_LENGTH(data.offline.EOR, data.null.EOR);
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case REQ_BURST:
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return PADDING_LENGTH(data.burst.EOR, data.null.EOR);
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case REQ_MODIFY_MINPOLL:
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return PADDING_LENGTH(data.modify_minpoll.EOR, data.null.EOR);
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case REQ_MODIFY_MAXPOLL:
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return PADDING_LENGTH(data.modify_maxpoll.EOR, data.null.EOR);
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case REQ_DUMP:
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return PADDING_LENGTH(data.dump.EOR, data.null.EOR);
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case REQ_MODIFY_MAXDELAY:
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return PADDING_LENGTH(data.modify_maxdelay.EOR, data.null.EOR);
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case REQ_MODIFY_MAXDELAYRATIO:
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return PADDING_LENGTH(data.modify_maxdelayratio.EOR, data.null.EOR);
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case REQ_MODIFY_MAXDELAYDEVRATIO:
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return PADDING_LENGTH(data.modify_maxdelaydevratio.EOR, data.null.EOR);
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case REQ_MODIFY_MAXUPDATESKEW:
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return PADDING_LENGTH(data.modify_maxupdateskew.EOR, data.null.EOR);
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case REQ_MODIFY_MAKESTEP:
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return PADDING_LENGTH(data.modify_makestep.EOR, data.null.EOR);
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case REQ_LOGON:
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return PADDING_LENGTH(data.logon.EOR, data.null.EOR);
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case REQ_SETTIME:
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return PADDING_LENGTH(data.settime.EOR, data.manual_timestamp.EOR);
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case REQ_LOCAL:
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return PADDING_LENGTH(data.local.EOR, data.null.EOR);
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case REQ_MANUAL:
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return PADDING_LENGTH(data.manual.EOR, data.null.EOR);
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case REQ_N_SOURCES:
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return PADDING_LENGTH(data.null.EOR, data.n_sources.EOR);
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case REQ_SOURCE_DATA:
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return PADDING_LENGTH(data.source_data.EOR, data.source_data.EOR);
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case REQ_REKEY:
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return PADDING_LENGTH(data.null.EOR, data.null.EOR);
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case REQ_ALLOW:
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return PADDING_LENGTH(data.allow_deny.EOR, data.null.EOR);
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case REQ_ALLOWALL:
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return PADDING_LENGTH(data.allow_deny.EOR, data.null.EOR);
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case REQ_DENY:
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return PADDING_LENGTH(data.allow_deny.EOR, data.null.EOR);
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case REQ_DENYALL:
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return PADDING_LENGTH(data.allow_deny.EOR, data.null.EOR);
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case REQ_CMDALLOW:
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return PADDING_LENGTH(data.allow_deny.EOR, data.null.EOR);
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case REQ_CMDALLOWALL:
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return PADDING_LENGTH(data.allow_deny.EOR, data.null.EOR);
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case REQ_CMDDENY:
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return PADDING_LENGTH(data.allow_deny.EOR, data.null.EOR);
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case REQ_CMDDENYALL:
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return PADDING_LENGTH(data.allow_deny.EOR, data.null.EOR);
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case REQ_ACCHECK:
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return PADDING_LENGTH(data.ac_check.EOR, data.null.EOR);
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case REQ_CMDACCHECK:
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return PADDING_LENGTH(data.ac_check.EOR, data.null.EOR);
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case REQ_ADD_SERVER:
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return PADDING_LENGTH(data.ntp_source.EOR, data.null.EOR);
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case REQ_ADD_PEER:
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return PADDING_LENGTH(data.ntp_source.EOR, data.null.EOR);
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case REQ_DEL_SOURCE:
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return PADDING_LENGTH(data.del_source.EOR, data.null.EOR);
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case REQ_WRITERTC:
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return PADDING_LENGTH(data.null.EOR, data.null.EOR);
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case REQ_DFREQ:
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return PADDING_LENGTH(data.dfreq.EOR, data.null.EOR);
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case REQ_DOFFSET:
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return PADDING_LENGTH(data.doffset.EOR, data.null.EOR);
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case REQ_TRACKING:
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return PADDING_LENGTH(data.null.EOR, data.tracking.EOR);
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case REQ_SOURCESTATS:
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return PADDING_LENGTH(data.sourcestats.EOR, data.sourcestats.EOR);
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case REQ_RTCREPORT:
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return PADDING_LENGTH(data.null.EOR, data.rtc.EOR);
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case REQ_TRIMRTC:
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return PADDING_LENGTH(data.null.EOR, data.null.EOR);
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case REQ_CYCLELOGS:
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return PADDING_LENGTH(data.null.EOR, data.null.EOR);
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case REQ_SUBNETS_ACCESSED:
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case REQ_CLIENT_ACCESSES:
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/* No longer supported */
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return 0;
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case REQ_CLIENT_ACCESSES_BY_INDEX:
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return PADDING_LENGTH(data.client_accesses_by_index.EOR, data.client_accesses_by_index.EOR);
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case REQ_MANUAL_LIST:
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return PADDING_LENGTH(data.null.EOR, data.manual_list.EOR);
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case REQ_MANUAL_DELETE:
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return PADDING_LENGTH(data.manual_delete.EOR, data.null.EOR);
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case REQ_MAKESTEP:
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return PADDING_LENGTH(data.null.EOR, data.null.EOR);
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case REQ_ACTIVITY:
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return PADDING_LENGTH(data.null.EOR, data.activity.EOR);
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case REQ_RESELECT:
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return PADDING_LENGTH(data.null.EOR, data.null.EOR);
|
||||
case REQ_RESELECTDISTANCE:
|
||||
return PADDING_LENGTH(data.reselect_distance.EOR, data.null.EOR);
|
||||
case REQ_MODIFY_MINSTRATUM:
|
||||
return PADDING_LENGTH(data.modify_minstratum.EOR, data.null.EOR);
|
||||
case REQ_MODIFY_POLLTARGET:
|
||||
return PADDING_LENGTH(data.modify_polltarget.EOR, data.null.EOR);
|
||||
case REQ_SMOOTHING:
|
||||
return PADDING_LENGTH(data.null.EOR, data.smoothing.EOR);
|
||||
case REQ_SMOOTHTIME:
|
||||
return PADDING_LENGTH(data.smoothtime.EOR, data.null.EOR);
|
||||
case REQ_REFRESH:
|
||||
return PADDING_LENGTH(data.null.EOR, data.null.EOR);
|
||||
case REQ_SERVER_STATS:
|
||||
return PADDING_LENGTH(data.null.EOR, data.server_stats.EOR);
|
||||
default:
|
||||
/* If we fall through the switch, it most likely means we've forgotten to implement a new case */
|
||||
assert(0);
|
||||
return 0;
|
||||
}
|
||||
return request_lengths[ntohs(r->command)].padding;
|
||||
}
|
||||
|
||||
/* ================================================== */
|
||||
|
|
@ -324,57 +174,32 @@ PKL_CommandPaddingLength(CMD_Request *r)
|
|||
int
|
||||
PKL_ReplyLength(CMD_Reply *r)
|
||||
{
|
||||
int type;
|
||||
uint32_t type;
|
||||
|
||||
assert(sizeof (reply_lengths) / sizeof (reply_lengths[0]) == N_REPLY_TYPES);
|
||||
|
||||
type = ntohs(r->reply);
|
||||
|
||||
/* Note that reply type codes start from 1, not 0 */
|
||||
if (type < 1 || type >= N_REPLY_TYPES) {
|
||||
if (type < 1 || type >= N_REPLY_TYPES)
|
||||
return 0;
|
||||
} else {
|
||||
switch (type) {
|
||||
case RPY_NULL:
|
||||
return offsetof(CMD_Reply, data.null.EOR);
|
||||
case RPY_N_SOURCES:
|
||||
return offsetof(CMD_Reply, data.n_sources.EOR);
|
||||
case RPY_SOURCE_DATA:
|
||||
return offsetof(CMD_Reply, data.source_data.EOR);
|
||||
case RPY_MANUAL_TIMESTAMP:
|
||||
return offsetof(CMD_Reply, data.manual_timestamp.EOR);
|
||||
case RPY_TRACKING:
|
||||
return offsetof(CMD_Reply, data.tracking.EOR);
|
||||
case RPY_SOURCESTATS:
|
||||
return offsetof(CMD_Reply, data.sourcestats.EOR);
|
||||
case RPY_RTC:
|
||||
return offsetof(CMD_Reply, data.rtc.EOR);
|
||||
case RPY_SUBNETS_ACCESSED :
|
||||
case RPY_CLIENT_ACCESSES:
|
||||
/* No longer supported */
|
||||
return 0;
|
||||
case RPY_CLIENT_ACCESSES_BY_INDEX:
|
||||
return offsetof(CMD_Reply, data.client_accesses_by_index.EOR);
|
||||
case RPY_MANUAL_LIST:
|
||||
{
|
||||
unsigned long ns = ntohl(r->data.manual_list.n_samples);
|
||||
if (ns > MAX_MANUAL_LIST_SAMPLES)
|
||||
return 0;
|
||||
if (r->status == htons(STT_SUCCESS)) {
|
||||
return (offsetof(CMD_Reply, data.manual_list.samples) +
|
||||
ns * sizeof(RPY_ManualListSample));
|
||||
} else {
|
||||
return offsetof(CMD_Reply, data);
|
||||
}
|
||||
}
|
||||
case RPY_ACTIVITY:
|
||||
return offsetof(CMD_Reply, data.activity.EOR);
|
||||
case RPY_SMOOTHING:
|
||||
return offsetof(CMD_Reply, data.smoothing.EOR);
|
||||
case RPY_SERVER_STATS:
|
||||
return offsetof(CMD_Reply, data.server_stats.EOR);
|
||||
default:
|
||||
assert(0);
|
||||
}
|
||||
|
||||
/* Length of MANUAL_LIST depends on number of samples stored in it */
|
||||
if (type == RPY_MANUAL_LIST) {
|
||||
uint32_t ns;
|
||||
|
||||
if (r->status != htons(STT_SUCCESS))
|
||||
return offsetof(CMD_Reply, data);
|
||||
|
||||
ns = ntohl(r->data.manual_list.n_samples);
|
||||
if (ns > MAX_MANUAL_LIST_SAMPLES)
|
||||
return 0;
|
||||
|
||||
return offsetof(CMD_Reply, data.manual_list.samples) +
|
||||
ns * sizeof (RPY_ManualListSample);
|
||||
}
|
||||
|
||||
return 0;
|
||||
return reply_lengths[type];
|
||||
}
|
||||
|
||||
/* ================================================== */
|
||||
|
|
|
|||
Loading…
Reference in a new issue