New upstream version 1.5.0+dfsgupstream/1.5.0+dfsg

1 files changed, 231 insertions, 583 deletions

diff --git a/src/proc_net_netstat.c b/src/proc_net_netstat.c
index ea38acf29..8741a71c9 100644
--- a/src/proc_net_netstat.c
+++ b/src/proc_net_netstat.c
@@ -1,197 +1,22 @@
 #include "common.h"
 
-
-struct netstat_columns {
-    char *name;
-    uint32_t hash;
-    unsigned long long value;
-    int multiplier;     // not needed everywhere
-    char *label;        // not needed everywhere
-};
-
-static struct netstat_columns tcpext_data[] = {
-    { "SyncookiesSent", 0, 0, 1, NULL },
-    { "SyncookiesRecv", 0, 0, 1, NULL },
-    { "SyncookiesFailed", 0, 0, 1, NULL },
-    { "EmbryonicRsts", 0, 0, 1, NULL },
-    { "PruneCalled", 0, 0, 1, NULL },
-    { "RcvPruned", 0, 0, 1, NULL },
-    { "OfoPruned", 0, 0, 1, NULL },
-    { "OutOfWindowIcmps", 0, 0, 1, NULL },
-    { "LockDroppedIcmps", 0, 0, 1, NULL },
-    { "ArpFilter", 0, 0, 1, NULL },
-    { "TW", 0, 0, 1, NULL },
-    { "TWRecycled", 0, 0, 1, NULL },
-    { "TWKilled", 0, 0, 1, NULL },
-    { "PAWSPassive", 0, 0, 1, NULL },
-    { "PAWSActive", 0, 0, 1, NULL },
-    { "PAWSEstab", 0, 0, 1, NULL },
-    { "DelayedACKs", 0, 0, 1, NULL },
-    { "DelayedACKLocked", 0, 0, 1, NULL },
-    { "DelayedACKLost", 0, 0, 1, NULL },
-    { "ListenOverflows", 0, 0, 1, NULL },
-    { "ListenDrops", 0, 0, 1, NULL },
-    { "TCPPrequeued", 0, 0, 1, NULL },
-    { "TCPDirectCopyFromBacklog", 0, 0, 1, NULL },
-    { "TCPDirectCopyFromPrequeue", 0, 0, 1, NULL },
-    { "TCPPrequeueDropped", 0, 0, 1, NULL },
-    { "TCPHPHits", 0, 0, 1, NULL },
-    { "TCPHPHitsToUser", 0, 0, 1, NULL },
-    { "TCPPureAcks", 0, 0, 1, NULL },
-    { "TCPHPAcks", 0, 0, 1, NULL },
-    { "TCPRenoRecovery", 0, 0, 1, NULL },
-    { "TCPSackRecovery", 0, 0, 1, NULL },
-    { "TCPSACKReneging", 0, 0, 1, NULL },
-    { "TCPFACKReorder", 0, 0, 1, NULL },
-    { "TCPSACKReorder", 0, 0, 1, NULL },
-    { "TCPRenoReorder", 0, 0, 1, NULL },
-    { "TCPTSReorder", 0, 0, 1, NULL },
-    { "TCPFullUndo", 0, 0, 1, NULL },
-    { "TCPPartialUndo", 0, 0, 1, NULL },
-    { "TCPDSACKUndo", 0, 0, 1, NULL },
-    { "TCPLossUndo", 0, 0, 1, NULL },
-    { "TCPLostRetransmit", 0, 0, 1, NULL },
-    { "TCPRenoFailures", 0, 0, 1, NULL },
-    { "TCPSackFailures", 0, 0, 1, NULL },
-    { "TCPLossFailures", 0, 0, 1, NULL },
-    { "TCPFastRetrans", 0, 0, 1, NULL },
-    { "TCPForwardRetrans", 0, 0, 1, NULL },
-    { "TCPSlowStartRetrans", 0, 0, 1, NULL },
-    { "TCPTimeouts", 0, 0, 1, NULL },
-    { "TCPLossProbes", 0, 0, 1, NULL },
-    { "TCPLossProbeRecovery", 0, 0, 1, NULL },
-    { "TCPRenoRecoveryFail", 0, 0, 1, NULL },
-    { "TCPSackRecoveryFail", 0, 0, 1, NULL },
-    { "TCPSchedulerFailed", 0, 0, 1, NULL },
-    { "TCPRcvCollapsed", 0, 0, 1, NULL },
-    { "TCPDSACKOldSent", 0, 0, 1, NULL },
-    { "TCPDSACKOfoSent", 0, 0, 1, NULL },
-    { "TCPDSACKRecv", 0, 0, 1, NULL },
-    { "TCPDSACKOfoRecv", 0, 0, 1, NULL },
-    { "TCPAbortOnData", 0, 0, 1, NULL },
-    { "TCPAbortOnClose", 0, 0, 1, NULL },
-    { "TCPAbortOnMemory", 0, 0, 1, NULL },
-    { "TCPAbortOnTimeout", 0, 0, 1, NULL },
-    { "TCPAbortOnLinger", 0, 0, 1, NULL },
-    { "TCPAbortFailed", 0, 0, 1, NULL },
-    { "TCPMemoryPressures", 0, 0, 1, NULL },
-    { "TCPSACKDiscard", 0, 0, 1, NULL },
-    { "TCPDSACKIgnoredOld", 0, 0, 1, NULL },
-    { "TCPDSACKIgnoredNoUndo", 0, 0, 1, NULL },
-    { "TCPSpuriousRTOs", 0, 0, 1, NULL },
-    { "TCPMD5NotFound", 0, 0, 1, NULL },
-    { "TCPMD5Unexpected", 0, 0, 1, NULL },
-    { "TCPSackShifted", 0, 0, 1, NULL },
-    { "TCPSackMerged", 0, 0, 1, NULL },
-    { "TCPSackShiftFallback", 0, 0, 1, NULL },
-    { "TCPBacklogDrop", 0, 0, 1, NULL },
-    { "TCPMinTTLDrop", 0, 0, 1, NULL },
-    { "TCPDeferAcceptDrop", 0, 0, 1, NULL },
-    { "IPReversePathFilter", 0, 0, 1, NULL },
-    { "TCPTimeWaitOverflow", 0, 0, 1, NULL },
-    { "TCPReqQFullDoCookies", 0, 0, 1, NULL },
-    { "TCPReqQFullDrop", 0, 0, 1, NULL },
-    { "TCPRetransFail", 0, 0, 1, NULL },
-    { "TCPRcvCoalesce", 0, 0, 1, NULL },
-    { "TCPOFOQueue", 0, 0, 1, NULL },
-    { "TCPOFODrop", 0, 0, 1, NULL },
-    { "TCPOFOMerge", 0, 0, 1, NULL },
-    { "TCPChallengeACK", 0, 0, 1, NULL },
-    { "TCPSYNChallenge", 0, 0, 1, NULL },
-    { "TCPFastOpenActive", 0, 0, 1, NULL },
-    { "TCPFastOpenActiveFail", 0, 0, 1, NULL },
-    { "TCPFastOpenPassive", 0, 0, 1, NULL },
-    { "TCPFastOpenPassiveFail", 0, 0, 1, NULL },
-    { "TCPFastOpenListenOverflow", 0, 0, 1, NULL },
-    { "TCPFastOpenCookieReqd", 0, 0, 1, NULL },
-    { "TCPSpuriousRtxHostQueues", 0, 0, 1, NULL },
-    { "BusyPollRxPackets", 0, 0, 1, NULL },
-    { "TCPAutoCorking", 0, 0, 1, NULL },
-    { "TCPFromZeroWindowAdv", 0, 0, 1, NULL },
-    { "TCPToZeroWindowAdv", 0, 0, 1, NULL },
-    { "TCPWantZeroWindowAdv", 0, 0, 1, NULL },
-    { "TCPSynRetrans", 0, 0, 1, NULL },
-    { "TCPOrigDataSent", 0, 0, 1, NULL },
-    { "TCPHystartTrainDetect", 0, 0, 1, NULL },
-    { "TCPHystartTrainCwnd", 0, 0, 1, NULL },
-    { "TCPHystartDelayDetect", 0, 0, 1, NULL },
-    { "TCPHystartDelayCwnd", 0, 0, 1, NULL },
-    { "TCPACKSkippedSynRecv", 0, 0, 1, NULL },
-    { "TCPACKSkippedPAWS", 0, 0, 1, NULL },
-    { "TCPACKSkippedSeq", 0, 0, 1, NULL },
-    { "TCPACKSkippedFinWait2", 0, 0, 1, NULL },
-    { "TCPACKSkippedTimeWait", 0, 0, 1, NULL },
-    { "TCPACKSkippedChallenge", 0, 0, 1, NULL },
-    { "TCPWinProbe", 0, 0, 1, NULL },
-    { "TCPKeepAlive", 0, 0, 1, NULL },
-    { "TCPMTUPFail", 0, 0, 1, NULL },
-    { "TCPMTUPSuccess", 0, 0, 1, NULL },
-    { NULL, 0, 0, 0, NULL }
-};
-
-static struct netstat_columns ipext_data[] = {
-    { "InNoRoutes", 0, 0, 1, NULL },
-    { "InTruncatedPkts", 0, 0, 1, NULL },
-    { "InMcastPkts", 0, 0, 1, NULL },
-    { "OutMcastPkts", 0, 0, 1, NULL },
-    { "InBcastPkts", 0, 0, 1, NULL },
-    { "OutBcastPkts", 0, 0, 1, NULL },
-    { "InOctets", 0, 0, 1, NULL },
-    { "OutOctets", 0, 0, 1, NULL },
-    { "InMcastOctets", 0, 0, 1, NULL },
-    { "OutMcastOctets", 0, 0, 1, NULL },
-    { "InBcastOctets", 0, 0, 1, NULL },
-    { "OutBcastOctets", 0, 0, 1, NULL },
-    { "InCsumErrors", 0, 0, 1, NULL },
-    { "InNoECTPkts", 0, 0, 1, NULL },
-    { "InECT1Pkts", 0, 0, 1, NULL },
-    { "InECT0Pkts", 0, 0, 1, NULL },
-    { "InCEPkts", 0, 0, 1, NULL },
-    { NULL, 0, 0, 0, NULL }
-};
-
-static void hash_array(struct netstat_columns *nc) {
-    int i;
-
-    for(i = 0; nc[i].name ;i++)
-        nc[i].hash = simple_hash(nc[i].name);
-}
-
-static unsigned long long *netstat_columns_find(struct netstat_columns *nc, const char *name) {
-    uint32_t i, hash = simple_hash(name);
-
-    for(i = 0; nc[i].name ;i++)
-        if(unlikely(nc[i].hash == hash && !strcmp(nc[i].name, name)))
-            return &nc[i].value;
-
-    fatal("Cannot find key '%s' in /proc/net/netstat internal array.", name);
-}
-
-static void parse_line_pair(procfile *ff, struct netstat_columns *nc, uint32_t header_line, uint32_t values_line) {
-    uint32_t hwords = procfile_linewords(ff, header_line);
-    uint32_t vwords = procfile_linewords(ff, values_line);
-    uint32_t w, i;
+static void parse_line_pair(procfile *ff, ARL_BASE *base, size_t header_line, size_t values_line) {
+    size_t hwords = procfile_linewords(ff, header_line);
+    size_t vwords = procfile_linewords(ff, values_line);
+    size_t w;
 
     if(unlikely(vwords > hwords)) {
-        error("File /proc/net/netstat on header line %u has %u words, but on value line %u has %u words.", header_line, hwords, values_line, vwords);
+        error("File /proc/net/netstat on header line %zu has %zu words, but on value line %zu has %zu words.", header_line, hwords, values_line, vwords);
         vwords = hwords;
     }
 
     for(w = 1; w < vwords ;w++) {
-        char *key = procfile_lineword(ff, header_line, w);
-        uint32_t hash = simple_hash(key);
-
-        for(i = 0 ; nc[i].name ;i++) {
-            if(unlikely(hash == nc[i].hash && !strcmp(key, nc[i].name))) {
-                nc[i].value = strtoull(procfile_lineword(ff, values_line, w), NULL, 10);
-                break;
-            }
-        }
+        if(unlikely(arl_check(base, procfile_lineword(ff, header_line, w), procfile_lineword(ff, values_line, w))))
+            break;
     }
 }
 
-
-int do_proc_net_netstat(int update_every, unsigned long long dt) {
+int do_proc_net_netstat(int update_every, usec_t dt) {
     (void)dt;
 
     static int do_bandwidth = -1, do_inerrors = -1, do_mcast = -1, do_bcast = -1, do_mcast_p = -1, do_bcast_p = -1, do_ecn = -1, \
@@ -199,178 +24,80 @@ int do_proc_net_netstat(int update_every, unsigned long long dt) {
     static uint32_t hash_ipext = 0, hash_tcpext = 0;
     static procfile *ff = NULL;
 
-    static unsigned long long *tcpext_TCPRenoReorder = NULL;
-    static unsigned long long *tcpext_TCPFACKReorder = NULL;
-    static unsigned long long *tcpext_TCPSACKReorder = NULL;
-    static unsigned long long *tcpext_TCPTSReorder = NULL;
-
-    static unsigned long long *tcpext_SyncookiesSent = NULL;
-    static unsigned long long *tcpext_SyncookiesRecv = NULL;
-    static unsigned long long *tcpext_SyncookiesFailed = NULL;
+    static ARL_BASE *arl_tcpext = NULL;
+    static ARL_BASE *arl_ipext = NULL;
+
+    // --------------------------------------------------------------------
+    // IPv4
+
+    // IPv4 bandwidth
+    static unsigned long long ipext_InOctets = 0;
+    static unsigned long long ipext_OutOctets = 0;
+
+    // IPv4 input errors
+    static unsigned long long ipext_InNoRoutes = 0;
+    static unsigned long long ipext_InTruncatedPkts = 0;
+    static unsigned long long ipext_InCsumErrors = 0;
+
+    // IPv4 multicast bandwidth
+    static unsigned long long ipext_InMcastOctets = 0;
+    static unsigned long long ipext_OutMcastOctets = 0;
+
+    // IPv4 multicast packets
+    static unsigned long long ipext_InMcastPkts = 0;
+    static unsigned long long ipext_OutMcastPkts = 0;
+
+    // IPv4 broadcast bandwidth
+    static unsigned long long ipext_InBcastOctets = 0;
+    static unsigned long long ipext_OutBcastOctets = 0;
+
+    // IPv4 broadcast packets
+    static unsigned long long ipext_InBcastPkts = 0;
+    static unsigned long long ipext_OutBcastPkts = 0;
+
+    // IPv4 ECN
+    static unsigned long long ipext_InNoECTPkts = 0;
+    static unsigned long long ipext_InECT1Pkts = 0;
+    static unsigned long long ipext_InECT0Pkts = 0;
+    static unsigned long long ipext_InCEPkts = 0;
+
+    // --------------------------------------------------------------------
+    // IPv4 TCP
+
+    // IPv4 TCP Reordering
+    static unsigned long long tcpext_TCPRenoReorder = 0;
+    static unsigned long long tcpext_TCPFACKReorder = 0;
+    static unsigned long long tcpext_TCPSACKReorder = 0;
+    static unsigned long long tcpext_TCPTSReorder = 0;
+
+    // IPv4 TCP SYN Cookies
+    static unsigned long long tcpext_SyncookiesSent = 0;
+    static unsigned long long tcpext_SyncookiesRecv = 0;
+    static unsigned long long tcpext_SyncookiesFailed = 0;
+
+    // IPv4 TCP Out Of Order Queue
+    // http://www.spinics.net/lists/netdev/msg204696.html
+    static unsigned long long tcpext_TCPOFOQueue = 0; // Number of packets queued in OFO queue
+    static unsigned long long tcpext_TCPOFODrop = 0;  // Number of packets meant to be queued in OFO but dropped because socket rcvbuf limit hit.
+    static unsigned long long tcpext_TCPOFOMerge = 0; // Number of packets in OFO that were merged with other packets.
+    static unsigned long long tcpext_OfoPruned = 0;   // packets dropped from out-of-order queue because of socket buffer overrun
+
+    // IPv4 TCP connection resets
+    // https://github.com/ecki/net-tools/blob/bd8bceaed2311651710331a7f8990c3e31be9840/statistics.c
+    static unsigned long long tcpext_TCPAbortOnData = 0;    // connections reset due to unexpected data
+    static unsigned long long tcpext_TCPAbortOnClose = 0;   // connections reset due to early user close
+    static unsigned long long tcpext_TCPAbortOnMemory = 0;  // connections aborted due to memory pressure
+    static unsigned long long tcpext_TCPAbortOnTimeout = 0; // connections aborted due to timeout
+    static unsigned long long tcpext_TCPAbortOnLinger = 0;  // connections aborted after user close in linger timeout
+    static unsigned long long tcpext_TCPAbortFailed = 0;    // times unable to send RST due to no memory
+
+    // IPv4 TCP memory pressures
+    static unsigned long long tcpext_TCPMemoryPressures = 0;
+
+    if(unlikely(!arl_ipext)) {
+        hash_ipext = simple_hash("IpExt");
+        hash_tcpext = simple_hash("TcpExt");
 
-    static unsigned long long *tcpext_TCPOFOQueue = NULL; // Number of packets queued in OFO queue
-    static unsigned long long *tcpext_TCPOFODrop = NULL;  // Number of packets meant to be queued in OFO but dropped because socket rcvbuf limit hit.
-    static unsigned long long *tcpext_TCPOFOMerge = NULL; // Number of packets in OFO that were merged with other packets.
-    static unsigned long long *tcpext_OfoPruned = NULL;   // packets dropped from out-of-order queue because of socket buffer overrun
-
-    static unsigned long long *tcpext_TCPAbortOnData = NULL;    // connections reset due to unexpected data
-    static unsigned long long *tcpext_TCPAbortOnClose = NULL;   // connections reset due to early user close
-    static unsigned long long *tcpext_TCPAbortOnMemory = NULL;  // connections aborted due to memory pressure
-    static unsigned long long *tcpext_TCPAbortOnTimeout = NULL; // connections aborted due to timeout
-    static unsigned long long *tcpext_TCPAbortOnLinger = NULL;  // connections aborted after user close in linger timeout
-    static unsigned long long *tcpext_TCPAbortFailed = NULL;    // times unable to send RST due to no memory
-
-    static unsigned long long *tcpext_TCPMemoryPressures = NULL;
-
-/*
-    // connection rejects
-    static unsigned long long *tcpext_PAWSActive = NULL;  // active connections rejected because of time stamp
-    static unsigned long long *tcpext_PAWSPassive = NULL; // passive connections rejected because of time stamp
-
-    static unsigned long long *tcpext_TCPTimeouts = NULL;
-
-    static unsigned long long *tcpext_TCPDSACKUndo = NULL;
-    static unsigned long long *tcpext_TCPDSACKOldSent = NULL;
-    static unsigned long long *tcpext_TCPDSACKOfoSent = NULL;
-    static unsigned long long *tcpext_TCPDSACKRecv = NULL;
-    static unsigned long long *tcpext_TCPDSACKOfoRecv = NULL;
-    static unsigned long long *tcpext_TCPDSACKIgnoredOld = NULL;
-    static unsigned long long *tcpext_TCPDSACKIgnoredNoUndo = NULL;
-
-
-    static unsigned long long *tcpext_EmbryonicRsts = NULL;
-
-    static unsigned long long *tcpext_PruneCalled = NULL;
-    static unsigned long long *tcpext_RcvPruned = NULL;
-    static unsigned long long *tcpext_OutOfWindowIcmps = NULL;
-    static unsigned long long *tcpext_LockDroppedIcmps = NULL;
-    static unsigned long long *tcpext_ArpFilter = NULL;
-
-    static unsigned long long *tcpext_TW = NULL;
-    static unsigned long long *tcpext_TWRecycled = NULL;
-    static unsigned long long *tcpext_TWKilled = NULL;
-
-    static unsigned long long *tcpext_PAWSEstab = NULL;
-
-    static unsigned long long *tcpext_DelayedACKs = NULL;
-    static unsigned long long *tcpext_DelayedACKLocked = NULL;
-    static unsigned long long *tcpext_DelayedACKLost = NULL;
-
-    static unsigned long long *tcpext_ListenOverflows = NULL;
-    static unsigned long long *tcpext_ListenDrops = NULL;
-
-    static unsigned long long *tcpext_TCPPrequeued = NULL;
-
-    static unsigned long long *tcpext_TCPDirectCopyFromBacklog = NULL;
-    static unsigned long long *tcpext_TCPDirectCopyFromPrequeue = NULL;
-    static unsigned long long *tcpext_TCPPrequeueDropped = NULL;
-
-    static unsigned long long *tcpext_TCPHPHits = NULL;
-    static unsigned long long *tcpext_TCPHPHitsToUser = NULL;
-    static unsigned long long *tcpext_TCPHPAcks = NULL;
-
-    static unsigned long long *tcpext_TCPPureAcks = NULL;
-    static unsigned long long *tcpext_TCPRenoRecovery = NULL;
-
-    static unsigned long long *tcpext_TCPSackRecovery = NULL;
-    static unsigned long long *tcpext_TCPSackFailures = NULL;
-    static unsigned long long *tcpext_TCPSACKReneging = NULL;
-    static unsigned long long *tcpext_TCPSackRecoveryFail = NULL;
-    static unsigned long long *tcpext_TCPSACKDiscard = NULL;
-    static unsigned long long *tcpext_TCPSackShifted = NULL;
-    static unsigned long long *tcpext_TCPSackMerged = NULL;
-    static unsigned long long *tcpext_TCPSackShiftFallback = NULL;
-
-
-    static unsigned long long *tcpext_TCPFullUndo = NULL;
-    static unsigned long long *tcpext_TCPPartialUndo = NULL;
-
-    static unsigned long long *tcpext_TCPLossUndo = NULL;
-    static unsigned long long *tcpext_TCPLostRetransmit = NULL;
-
-    static unsigned long long *tcpext_TCPRenoFailures = NULL;
-
-    static unsigned long long *tcpext_TCPLossFailures = NULL;
-    static unsigned long long *tcpext_TCPFastRetrans = NULL;
-    static unsigned long long *tcpext_TCPForwardRetrans = NULL;
-    static unsigned long long *tcpext_TCPSlowStartRetrans = NULL;
-    static unsigned long long *tcpext_TCPLossProbes = NULL;
-    static unsigned long long *tcpext_TCPLossProbeRecovery = NULL;
-    static unsigned long long *tcpext_TCPRenoRecoveryFail = NULL;
-    static unsigned long long *tcpext_TCPSchedulerFailed = NULL;
-    static unsigned long long *tcpext_TCPRcvCollapsed = NULL;
-
-    static unsigned long long *tcpext_TCPSpuriousRTOs = NULL;
-    static unsigned long long *tcpext_TCPMD5NotFound = NULL;
-    static unsigned long long *tcpext_TCPMD5Unexpected = NULL;
-
-    static unsigned long long *tcpext_TCPBacklogDrop = NULL;
-    static unsigned long long *tcpext_TCPMinTTLDrop = NULL;
-    static unsigned long long *tcpext_TCPDeferAcceptDrop = NULL;
-    static unsigned long long *tcpext_IPReversePathFilter = NULL;
-    static unsigned long long *tcpext_TCPTimeWaitOverflow = NULL;
-    static unsigned long long *tcpext_TCPReqQFullDoCookies = NULL;
-    static unsigned long long *tcpext_TCPReqQFullDrop = NULL;
-    static unsigned long long *tcpext_TCPRetransFail = NULL;
-    static unsigned long long *tcpext_TCPRcvCoalesce = NULL;
-
-    static unsigned long long *tcpext_TCPChallengeACK = NULL;
-    static unsigned long long *tcpext_TCPSYNChallenge = NULL;
-
-    static unsigned long long *tcpext_TCPFastOpenActive = NULL;
-    static unsigned long long *tcpext_TCPFastOpenActiveFail = NULL;
-    static unsigned long long *tcpext_TCPFastOpenPassive = NULL;
-    static unsigned long long *tcpext_TCPFastOpenPassiveFail = NULL;
-    static unsigned long long *tcpext_TCPFastOpenListenOverflow = NULL;
-    static unsigned long long *tcpext_TCPFastOpenCookieReqd = NULL;
-
-    static unsigned long long *tcpext_TCPSpuriousRtxHostQueues = NULL;
-    static unsigned long long *tcpext_BusyPollRxPackets = NULL;
-    static unsigned long long *tcpext_TCPAutoCorking = NULL;
-    static unsigned long long *tcpext_TCPFromZeroWindowAdv = NULL;
-    static unsigned long long *tcpext_TCPToZeroWindowAdv = NULL;
-    static unsigned long long *tcpext_TCPWantZeroWindowAdv = NULL;
-    static unsigned long long *tcpext_TCPSynRetrans = NULL;
-    static unsigned long long *tcpext_TCPOrigDataSent = NULL;
-
-    static unsigned long long *tcpext_TCPHystartTrainDetect = NULL;
-    static unsigned long long *tcpext_TCPHystartTrainCwnd = NULL;
-    static unsigned long long *tcpext_TCPHystartDelayDetect = NULL;
-    static unsigned long long *tcpext_TCPHystartDelayCwnd = NULL;
-
-    static unsigned long long *tcpext_TCPACKSkippedSynRecv = NULL;
-    static unsigned long long *tcpext_TCPACKSkippedPAWS = NULL;
-    static unsigned long long *tcpext_TCPACKSkippedSeq = NULL;
-    static unsigned long long *tcpext_TCPACKSkippedFinWait2 = NULL;
-    static unsigned long long *tcpext_TCPACKSkippedTimeWait = NULL;
-    static unsigned long long *tcpext_TCPACKSkippedChallenge = NULL;
-
-    static unsigned long long *tcpext_TCPWinProbe = NULL;
-    static unsigned long long *tcpext_TCPKeepAlive = NULL;
-
-    static unsigned long long *tcpext_TCPMTUPFail = NULL;
-    static unsigned long long *tcpext_TCPMTUPSuccess = NULL;
-*/
-
-    static unsigned long long *ipext_InNoRoutes = NULL;
-    static unsigned long long *ipext_InTruncatedPkts = NULL;
-    static unsigned long long *ipext_InMcastPkts = NULL;
-    static unsigned long long *ipext_OutMcastPkts = NULL;
-    static unsigned long long *ipext_InBcastPkts = NULL;
-    static unsigned long long *ipext_OutBcastPkts = NULL;
-    static unsigned long long *ipext_InOctets = NULL;
-    static unsigned long long *ipext_OutOctets = NULL;
-    static unsigned long long *ipext_InMcastOctets = NULL;
-    static unsigned long long *ipext_OutMcastOctets = NULL;
-    static unsigned long long *ipext_InBcastOctets = NULL;
-    static unsigned long long *ipext_OutBcastOctets = NULL;
-    static unsigned long long *ipext_InCsumErrors = NULL;
-    static unsigned long long *ipext_InNoECTPkts = NULL;
-    static unsigned long long *ipext_InECT1Pkts = NULL;
-    static unsigned long long *ipext_InECT0Pkts = NULL;
-    static unsigned long long *ipext_InCEPkts = NULL;
-
-    if(unlikely(do_bandwidth == -1)) {
         do_bandwidth = config_get_boolean_ondemand("plugin:proc:/proc/net/netstat", "bandwidth", CONFIG_ONDEMAND_ONDEMAND);
         do_inerrors  = config_get_boolean_ondemand("plugin:proc:/proc/net/netstat", "input errors", CONFIG_ONDEMAND_ONDEMAND);
         do_mcast     = config_get_boolean_ondemand("plugin:proc:/proc/net/netstat", "multicast bandwidth", CONFIG_ONDEMAND_ONDEMAND);
@@ -385,200 +112,124 @@ int do_proc_net_netstat(int update_every, unsigned long long dt) {
         do_tcpext_connaborts = config_get_boolean_ondemand("plugin:proc:/proc/net/netstat", "TCP connection aborts", CONFIG_ONDEMAND_ONDEMAND);
         do_tcpext_memory     = config_get_boolean_ondemand("plugin:proc:/proc/net/netstat", "TCP memory pressures", CONFIG_ONDEMAND_ONDEMAND);
 
-        hash_ipext = simple_hash("IpExt");
-        hash_tcpext = simple_hash("TcpExt");
+        arl_ipext  = arl_create("netstat/ipext", NULL, 60);
+        arl_tcpext = arl_create("netstat/tcpext", NULL, 60);
+
+        // --------------------------------------------------------------------
+        // IPv4
+
+        if(do_bandwidth != CONFIG_ONDEMAND_NO) {
+            arl_expect(arl_ipext, "InOctets",  &ipext_InOctets);
+            arl_expect(arl_ipext, "OutOctets", &ipext_OutOctets);
+        }
+
+        if(do_inerrors != CONFIG_ONDEMAND_NO) {
+            arl_expect(arl_ipext, "InNoRoutes",      &ipext_InNoRoutes);
+            arl_expect(arl_ipext, "InTruncatedPkts", &ipext_InTruncatedPkts);
+            arl_expect(arl_ipext, "InCsumErrors",    &ipext_InCsumErrors);
+        }
 
-        hash_array(ipext_data);
-        hash_array(tcpext_data);
-
-        // Reordering
-        tcpext_TCPFACKReorder = netstat_columns_find(tcpext_data, "TCPFACKReorder");
-        tcpext_TCPSACKReorder = netstat_columns_find(tcpext_data, "TCPSACKReorder");
-        tcpext_TCPRenoReorder = netstat_columns_find(tcpext_data, "TCPRenoReorder");
-        tcpext_TCPTSReorder = netstat_columns_find(tcpext_data, "TCPTSReorder");
-
-        // SYN Cookies
-        tcpext_SyncookiesSent = netstat_columns_find(tcpext_data, "SyncookiesSent");
-        tcpext_SyncookiesRecv = netstat_columns_find(tcpext_data, "SyncookiesRecv");
-        tcpext_SyncookiesFailed = netstat_columns_find(tcpext_data, "SyncookiesFailed");
-
-        // Out Of Order Queue
-        // http://www.spinics.net/lists/netdev/msg204696.html
-        tcpext_TCPOFOQueue = netstat_columns_find(tcpext_data, "TCPOFOQueue"); // Number of packets queued in OFO queue
-        tcpext_TCPOFODrop  = netstat_columns_find(tcpext_data, "TCPOFODrop");  // Number of packets meant to be queued in OFO but dropped because socket rcvbuf limit hit.
-        tcpext_TCPOFOMerge = netstat_columns_find(tcpext_data, "TCPOFOMerge"); // Number of packets in OFO that were merged with other packets.
-        tcpext_OfoPruned   = netstat_columns_find(tcpext_data, "OfoPruned");   // packets dropped from out-of-order queue because of socket buffer overrun
-
-        // connection resets
-        // https://github.com/ecki/net-tools/blob/bd8bceaed2311651710331a7f8990c3e31be9840/statistics.c
-        tcpext_TCPAbortOnData    = netstat_columns_find(tcpext_data, "TCPAbortOnData");    // connections reset due to unexpected data
-        tcpext_TCPAbortOnClose   = netstat_columns_find(tcpext_data, "TCPAbortOnClose");   // connections reset due to early user close
-        tcpext_TCPAbortOnMemory  = netstat_columns_find(tcpext_data, "TCPAbortOnMemory");  // connections aborted due to memory pressure
-        tcpext_TCPAbortOnTimeout = netstat_columns_find(tcpext_data, "TCPAbortOnTimeout"); // connections aborted due to timeout
-        tcpext_TCPAbortOnLinger  = netstat_columns_find(tcpext_data, "TCPAbortOnLinger");  // connections aborted after user close in linger timeout
-        tcpext_TCPAbortFailed    = netstat_columns_find(tcpext_data, "TCPAbortFailed");    // times unable to send RST due to no memory
-
-        tcpext_TCPMemoryPressures = netstat_columns_find(tcpext_data, "TCPMemoryPressures");
-
-        /*
-        tcpext_EmbryonicRsts = netstat_columns_find(tcpext_data, "EmbryonicRsts");
-        tcpext_PruneCalled = netstat_columns_find(tcpext_data, "PruneCalled");
-        tcpext_RcvPruned = netstat_columns_find(tcpext_data, "RcvPruned");
-        tcpext_OutOfWindowIcmps = netstat_columns_find(tcpext_data, "OutOfWindowIcmps");
-        tcpext_LockDroppedIcmps = netstat_columns_find(tcpext_data, "LockDroppedIcmps");
-        tcpext_ArpFilter = netstat_columns_find(tcpext_data, "ArpFilter");
-        tcpext_TW = netstat_columns_find(tcpext_data, "TW");
-        tcpext_TWRecycled = netstat_columns_find(tcpext_data, "TWRecycled");
-        tcpext_TWKilled = netstat_columns_find(tcpext_data, "TWKilled");
-        tcpext_PAWSPassive = netstat_columns_find(tcpext_data, "PAWSPassive");
-        tcpext_PAWSActive = netstat_columns_find(tcpext_data, "PAWSActive");
-        tcpext_PAWSEstab = netstat_columns_find(tcpext_data, "PAWSEstab");
-        tcpext_DelayedACKs = netstat_columns_find(tcpext_data, "DelayedACKs");
-        tcpext_DelayedACKLocked = netstat_columns_find(tcpext_data, "DelayedACKLocked");
-        tcpext_DelayedACKLost = netstat_columns_find(tcpext_data, "DelayedACKLost");
-        tcpext_ListenOverflows = netstat_columns_find(tcpext_data, "ListenOverflows");
-        tcpext_ListenDrops = netstat_columns_find(tcpext_data, "ListenDrops");
-        tcpext_TCPPrequeued = netstat_columns_find(tcpext_data, "TCPPrequeued");
-        tcpext_TCPDirectCopyFromBacklog = netstat_columns_find(tcpext_data, "TCPDirectCopyFromBacklog");
-        tcpext_TCPDirectCopyFromPrequeue = netstat_columns_find(tcpext_data, "TCPDirectCopyFromPrequeue");
-        tcpext_TCPPrequeueDropped = netstat_columns_find(tcpext_data, "TCPPrequeueDropped");
-        tcpext_TCPHPHits = netstat_columns_find(tcpext_data, "TCPHPHits");
-        tcpext_TCPHPHitsToUser = netstat_columns_find(tcpext_data, "TCPHPHitsToUser");
-        tcpext_TCPPureAcks = netstat_columns_find(tcpext_data, "TCPPureAcks");
-        tcpext_TCPHPAcks = netstat_columns_find(tcpext_data, "TCPHPAcks");
-        tcpext_TCPRenoRecovery = netstat_columns_find(tcpext_data, "TCPRenoRecovery");
-        tcpext_TCPSackRecovery = netstat_columns_find(tcpext_data, "TCPSackRecovery");
-        tcpext_TCPSACKReneging = netstat_columns_find(tcpext_data, "TCPSACKReneging");
-        tcpext_TCPFullUndo = netstat_columns_find(tcpext_data, "TCPFullUndo");
-        tcpext_TCPPartialUndo = netstat_columns_find(tcpext_data, "TCPPartialUndo");
-        tcpext_TCPDSACKUndo = netstat_columns_find(tcpext_data, "TCPDSACKUndo");
-        tcpext_TCPLossUndo = netstat_columns_find(tcpext_data, "TCPLossUndo");
-        tcpext_TCPLostRetransmit = netstat_columns_find(tcpext_data, "TCPLostRetransmit");
-        tcpext_TCPRenoFailures = netstat_columns_find(tcpext_data, "TCPRenoFailures");
-        tcpext_TCPSackFailures = netstat_columns_find(tcpext_data, "TCPSackFailures");
-        tcpext_TCPLossFailures = netstat_columns_find(tcpext_data, "TCPLossFailures");
-        tcpext_TCPFastRetrans = netstat_columns_find(tcpext_data, "TCPFastRetrans");
-        tcpext_TCPForwardRetrans = netstat_columns_find(tcpext_data, "TCPForwardRetrans");
-        tcpext_TCPSlowStartRetrans = netstat_columns_find(tcpext_data, "TCPSlowStartRetrans");
-        tcpext_TCPTimeouts = netstat_columns_find(tcpext_data, "TCPTimeouts");
-        tcpext_TCPLossProbes = netstat_columns_find(tcpext_data, "TCPLossProbes");
-        tcpext_TCPLossProbeRecovery = netstat_columns_find(tcpext_data, "TCPLossProbeRecovery");
-        tcpext_TCPRenoRecoveryFail = netstat_columns_find(tcpext_data, "TCPRenoRecoveryFail");
-        tcpext_TCPSackRecoveryFail = netstat_columns_find(tcpext_data, "TCPSackRecoveryFail");
-        tcpext_TCPSchedulerFailed = netstat_columns_find(tcpext_data, "TCPSchedulerFailed");
-        tcpext_TCPRcvCollapsed = netstat_columns_find(tcpext_data, "TCPRcvCollapsed");
-        tcpext_TCPDSACKOldSent = netstat_columns_find(tcpext_data, "TCPDSACKOldSent");
-        tcpext_TCPDSACKOfoSent = netstat_columns_find(tcpext_data, "TCPDSACKOfoSent");
-        tcpext_TCPDSACKRecv = netstat_columns_find(tcpext_data, "TCPDSACKRecv");
-        tcpext_TCPDSACKOfoRecv = netstat_columns_find(tcpext_data, "TCPDSACKOfoRecv");
-        tcpext_TCPSACKDiscard = netstat_columns_find(tcpext_data, "TCPSACKDiscard");
-        tcpext_TCPDSACKIgnoredOld = netstat_columns_find(tcpext_data, "TCPDSACKIgnoredOld");
-        tcpext_TCPDSACKIgnoredNoUndo = netstat_columns_find(tcpext_data, "TCPDSACKIgnoredNoUndo");
-        tcpext_TCPSpuriousRTOs = netstat_columns_find(tcpext_data, "TCPSpuriousRTOs");
-        tcpext_TCPMD5NotFound = netstat_columns_find(tcpext_data, "TCPMD5NotFound");
-        tcpext_TCPMD5Unexpected = netstat_columns_find(tcpext_data, "TCPMD5Unexpected");
-        tcpext_TCPSackShifted = netstat_columns_find(tcpext_data, "TCPSackShifted");
-        tcpext_TCPSackMerged = netstat_columns_find(tcpext_data, "TCPSackMerged");
-        tcpext_TCPSackShiftFallback = netstat_columns_find(tcpext_data, "TCPSackShiftFallback");
-        tcpext_TCPBacklogDrop = netstat_columns_find(tcpext_data, "TCPBacklogDrop");
-        tcpext_TCPMinTTLDrop = netstat_columns_find(tcpext_data, "TCPMinTTLDrop");
-        tcpext_TCPDeferAcceptDrop = netstat_columns_find(tcpext_data, "TCPDeferAcceptDrop");
-        tcpext_IPReversePathFilter = netstat_columns_find(tcpext_data, "IPReversePathFilter");
-        tcpext_TCPTimeWaitOverflow = netstat_columns_find(tcpext_data, "TCPTimeWaitOverflow");
-        tcpext_TCPReqQFullDoCookies = netstat_columns_find(tcpext_data, "TCPReqQFullDoCookies");
-        tcpext_TCPReqQFullDrop = netstat_columns_find(tcpext_data, "TCPReqQFullDrop");
-        tcpext_TCPRetransFail = netstat_columns_find(tcpext_data, "TCPRetransFail");
-        tcpext_TCPRcvCoalesce = netstat_columns_find(tcpext_data, "TCPRcvCoalesce");
-        tcpext_TCPChallengeACK = netstat_columns_find(tcpext_data, "TCPChallengeACK");
-        tcpext_TCPSYNChallenge = netstat_columns_find(tcpext_data, "TCPSYNChallenge");
-        tcpext_TCPFastOpenActive = netstat_columns_find(tcpext_data, "TCPFastOpenActive");
-        tcpext_TCPFastOpenActiveFail = netstat_columns_find(tcpext_data, "TCPFastOpenActiveFail");
-        tcpext_TCPFastOpenPassive = netstat_columns_find(tcpext_data, "TCPFastOpenPassive");
-        tcpext_TCPFastOpenPassiveFail = netstat_columns_find(tcpext_data, "TCPFastOpenPassiveFail");
-        tcpext_TCPFastOpenListenOverflow = netstat_columns_find(tcpext_data, "TCPFastOpenListenOverflow");
-        tcpext_TCPFastOpenCookieReqd = netstat_columns_find(tcpext_data, "TCPFastOpenCookieReqd");
-        tcpext_TCPSpuriousRtxHostQueues = netstat_columns_find(tcpext_data, "TCPSpuriousRtxHostQueues");
-        tcpext_BusyPollRxPackets = netstat_columns_find(tcpext_data, "BusyPollRxPackets");
-        tcpext_TCPAutoCorking = netstat_columns_find(tcpext_data, "TCPAutoCorking");
-        tcpext_TCPFromZeroWindowAdv = netstat_columns_find(tcpext_data, "TCPFromZeroWindowAdv");
-        tcpext_TCPToZeroWindowAdv = netstat_columns_find(tcpext_data, "TCPToZeroWindowAdv");
-        tcpext_TCPWantZeroWindowAdv = netstat_columns_find(tcpext_data, "TCPWantZeroWindowAdv");
-        tcpext_TCPSynRetrans = netstat_columns_find(tcpext_data, "TCPSynRetrans");
-        tcpext_TCPOrigDataSent = netstat_columns_find(tcpext_data, "TCPOrigDataSent");
-        tcpext_TCPHystartTrainDetect = netstat_columns_find(tcpext_data, "TCPHystartTrainDetect");
-        tcpext_TCPHystartTrainCwnd = netstat_columns_find(tcpext_data, "TCPHystartTrainCwnd");
-        tcpext_TCPHystartDelayDetect = netstat_columns_find(tcpext_data, "TCPHystartDelayDetect");
-        tcpext_TCPHystartDelayCwnd = netstat_columns_find(tcpext_data, "TCPHystartDelayCwnd");
-        tcpext_TCPACKSkippedSynRecv = netstat_columns_find(tcpext_data, "TCPACKSkippedSynRecv");
-        tcpext_TCPACKSkippedPAWS = netstat_columns_find(tcpext_data, "TCPACKSkippedPAWS");
-        tcpext_TCPACKSkippedSeq = netstat_columns_find(tcpext_data, "TCPACKSkippedSeq");
-        tcpext_TCPACKSkippedFinWait2 = netstat_columns_find(tcpext_data, "TCPACKSkippedFinWait2");
-        tcpext_TCPACKSkippedTimeWait = netstat_columns_find(tcpext_data, "TCPACKSkippedTimeWait");
-        tcpext_TCPACKSkippedChallenge = netstat_columns_find(tcpext_data, "TCPACKSkippedChallenge");
-        tcpext_TCPWinProbe = netstat_columns_find(tcpext_data, "TCPWinProbe");
-        tcpext_TCPKeepAlive = netstat_columns_find(tcpext_data, "TCPKeepAlive");
-        tcpext_TCPMTUPFail = netstat_columns_find(tcpext_data, "TCPMTUPFail");
-        tcpext_TCPMTUPSuccess = netstat_columns_find(tcpext_data, "TCPMTUPSuccess");
-*/
-        ipext_InNoRoutes = netstat_columns_find(ipext_data, "InNoRoutes");
-        ipext_InTruncatedPkts = netstat_columns_find(ipext_data, "InTruncatedPkts");
-        ipext_InMcastPkts = netstat_columns_find(ipext_data, "InMcastPkts");
-        ipext_OutMcastPkts = netstat_columns_find(ipext_data, "OutMcastPkts");
-        ipext_InBcastPkts = netstat_columns_find(ipext_data, "InBcastPkts");
-        ipext_OutBcastPkts = netstat_columns_find(ipext_data, "OutBcastPkts");
-        ipext_InOctets = netstat_columns_find(ipext_data, "InOctets");
-        ipext_OutOctets = netstat_columns_find(ipext_data, "OutOctets");
-        ipext_InMcastOctets = netstat_columns_find(ipext_data, "InMcastOctets");
-        ipext_OutMcastOctets = netstat_columns_find(ipext_data, "OutMcastOctets");
-        ipext_InBcastOctets = netstat_columns_find(ipext_data, "InBcastOctets");
-        ipext_OutBcastOctets = netstat_columns_find(ipext_data, "OutBcastOctets");
-        ipext_InCsumErrors = netstat_columns_find(ipext_data, "InCsumErrors");
-        ipext_InNoECTPkts = netstat_columns_find(ipext_data, "InNoECTPkts");
-        ipext_InECT1Pkts = netstat_columns_find(ipext_data, "InECT1Pkts");
-        ipext_InECT0Pkts = netstat_columns_find(ipext_data, "InECT0Pkts");
-        ipext_InCEPkts = netstat_columns_find(ipext_data, "InCEPkts");
+        if(do_mcast != CONFIG_ONDEMAND_NO) {
+            arl_expect(arl_ipext, "InMcastOctets", &ipext_InMcastOctets);
+            arl_expect(arl_ipext, "OutMcastOctets", &ipext_OutMcastOctets);
+        }
+
+        if(do_mcast_p != CONFIG_ONDEMAND_NO) {
+            arl_expect(arl_ipext, "InMcastPkts",  &ipext_InMcastPkts);
+            arl_expect(arl_ipext, "OutMcastPkts", &ipext_OutMcastPkts);
+        }
+
+        if(do_bcast != CONFIG_ONDEMAND_NO) {
+            arl_expect(arl_ipext, "InBcastPkts",  &ipext_InBcastPkts);
+            arl_expect(arl_ipext, "OutBcastPkts", &ipext_OutBcastPkts);
+        }
+
+        if(do_bcast_p != CONFIG_ONDEMAND_NO) {
+            arl_expect(arl_ipext, "InBcastOctets",  &ipext_InBcastOctets);
+            arl_expect(arl_ipext, "OutBcastOctets", &ipext_OutBcastOctets);
+        }
+
+        if(do_ecn != CONFIG_ONDEMAND_NO) {
+            arl_expect(arl_ipext, "InNoECTPkts", &ipext_InNoECTPkts);
+            arl_expect(arl_ipext, "InECT1Pkts",  &ipext_InECT1Pkts);
+            arl_expect(arl_ipext, "InECT0Pkts",  &ipext_InECT0Pkts);
+            arl_expect(arl_ipext, "InCEPkts",    &ipext_InCEPkts);
+        }
+
+        // --------------------------------------------------------------------
+        // IPv4 TCP
+
+        if(do_tcpext_reorder != CONFIG_ONDEMAND_NO) {
+            arl_expect(arl_tcpext, "TCPFACKReorder", &tcpext_TCPFACKReorder);
+            arl_expect(arl_tcpext, "TCPSACKReorder", &tcpext_TCPSACKReorder);
+            arl_expect(arl_tcpext, "TCPRenoReorder", &tcpext_TCPRenoReorder);
+            arl_expect(arl_tcpext, "TCPTSReorder",   &tcpext_TCPTSReorder);
+        }
+
+        if(do_tcpext_syscookies != CONFIG_ONDEMAND_NO) {
+            arl_expect(arl_tcpext, "SyncookiesSent",   &tcpext_SyncookiesSent);
+            arl_expect(arl_tcpext, "SyncookiesRecv",   &tcpext_SyncookiesRecv);
+            arl_expect(arl_tcpext, "SyncookiesFailed", &tcpext_SyncookiesFailed);
+        }
+
+        if(do_tcpext_ofo != CONFIG_ONDEMAND_NO) {
+            arl_expect(arl_tcpext, "TCPOFOQueue", &tcpext_TCPOFOQueue);
+            arl_expect(arl_tcpext, "TCPOFODrop",  &tcpext_TCPOFODrop);
+            arl_expect(arl_tcpext, "TCPOFOMerge", &tcpext_TCPOFOMerge);
+            arl_expect(arl_tcpext, "OfoPruned",   &tcpext_OfoPruned);
+        }
+
+        if(do_tcpext_connaborts != CONFIG_ONDEMAND_NO) {
+            arl_expect(arl_tcpext, "TCPAbortOnData",    &tcpext_TCPAbortOnData);
+            arl_expect(arl_tcpext, "TCPAbortOnClose",   &tcpext_TCPAbortOnClose);
+            arl_expect(arl_tcpext, "TCPAbortOnMemory",  &tcpext_TCPAbortOnMemory);
+            arl_expect(arl_tcpext, "TCPAbortOnTimeout", &tcpext_TCPAbortOnTimeout);
+            arl_expect(arl_tcpext, "TCPAbortOnLinger",  &tcpext_TCPAbortOnLinger);
+            arl_expect(arl_tcpext, "TCPAbortFailed",    &tcpext_TCPAbortFailed);
+        }
+
+        if(do_tcpext_memory != CONFIG_ONDEMAND_NO) {
+            arl_expect(arl_tcpext, "TCPMemoryPressures", &tcpext_TCPMemoryPressures);
+        }
     }
 
     if(unlikely(!ff)) {
         char filename[FILENAME_MAX + 1];
         snprintfz(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/proc/net/netstat");
         ff = procfile_open(config_get("plugin:proc:/proc/net/netstat", "filename to monitor", filename), " \t:", PROCFILE_FLAG_DEFAULT);
+        if(unlikely(!ff)) return 1;
     }
-    if(unlikely(!ff)) return 1;
 
     ff = procfile_readall(ff);
     if(unlikely(!ff)) return 0; // we return 0, so that we will retry to open it next time
 
-    uint32_t lines = procfile_lines(ff), l;
-    uint32_t words;
+    size_t lines = procfile_lines(ff), l;
+    size_t words;
 
     for(l = 0; l < lines ;l++) {
         char *key = procfile_lineword(ff, l, 0);
         uint32_t hash = simple_hash(key);
 
         if(unlikely(hash == hash_ipext && strcmp(key, "IpExt") == 0)) {
-            uint32_t h = l++;
+            size_t h = l++;
 
-            if(strcmp(procfile_lineword(ff, l, 0), "IpExt") != 0) {
-                error("Cannot read IpExt line from /proc/net/netstat.");
-                break;
-            }
             words = procfile_linewords(ff, l);
-            if(words < 2) {
-                error("Cannot read /proc/net/netstat IpExt line. Expected 2+ params, read %u.", words);
+            if(unlikely(words < 2)) {
+                error("Cannot read /proc/net/netstat IpExt line. Expected 2+ params, read %zu.", words);
                 continue;
             }
 
-            parse_line_pair(ff, ipext_data, h, l);
+            arl_begin(arl_ipext);
+            parse_line_pair(ff, arl_ipext, h, l);
 
             RRDSET *st;
 
             // --------------------------------------------------------------------
 
-            if(do_bandwidth == CONFIG_ONDEMAND_YES || (do_bandwidth == CONFIG_ONDEMAND_ONDEMAND && (*ipext_InOctets || *ipext_OutOctets))) {
+            if(do_bandwidth == CONFIG_ONDEMAND_YES || (do_bandwidth == CONFIG_ONDEMAND_ONDEMAND && (ipext_InOctets || ipext_OutOctets))) {
                 do_bandwidth = CONFIG_ONDEMAND_YES;
                 st = rrdset_find("system.ipv4");
-                if(!st) {
+                if(unlikely(!st)) {
                     st = rrdset_create("system", "ipv4", NULL, "network", NULL, "IPv4 Bandwidth", "kilobits/s", 500, update_every, RRDSET_TYPE_AREA);
 
                     rrddim_add(st, "InOctets", "received", 8, 1024, RRDDIM_INCREMENTAL);
@@ -586,17 +237,17 @@ int do_proc_net_netstat(int update_every, unsigned long long dt) {
                 }
                 else rrdset_next(st);
 
-                rrddim_set(st, "InOctets", *ipext_InOctets);
-                rrddim_set(st, "OutOctets", *ipext_OutOctets);
+                rrddim_set(st, "InOctets", ipext_InOctets);
+                rrddim_set(st, "OutOctets", ipext_OutOctets);
                 rrdset_done(st);
             }
 
             // --------------------------------------------------------------------
 
-            if(do_inerrors == CONFIG_ONDEMAND_YES || (do_inerrors == CONFIG_ONDEMAND_ONDEMAND && (*ipext_InNoRoutes || *ipext_InTruncatedPkts))) {
+            if(do_inerrors == CONFIG_ONDEMAND_YES || (do_inerrors == CONFIG_ONDEMAND_ONDEMAND && (ipext_InNoRoutes || ipext_InTruncatedPkts))) {
                 do_inerrors = CONFIG_ONDEMAND_YES;
                 st = rrdset_find("ipv4.inerrors");
-                if(!st) {
+                if(unlikely(!st)) {
                     st = rrdset_create("ipv4", "inerrors", NULL, "errors", NULL, "IPv4 Input Errors", "packets/s", 4000, update_every, RRDSET_TYPE_LINE);
                     st->isdetail = 1;
 
@@ -606,18 +257,18 @@ int do_proc_net_netstat(int update_every, unsigned long long dt) {
                 }
                 else rrdset_next(st);
 
-                rrddim_set(st, "InNoRoutes", *ipext_InNoRoutes);
-                rrddim_set(st, "InTruncatedPkts", *ipext_InTruncatedPkts);
-                rrddim_set(st, "InCsumErrors", *ipext_InCsumErrors);
+                rrddim_set(st, "InNoRoutes", ipext_InNoRoutes);
+                rrddim_set(st, "InTruncatedPkts", ipext_InTruncatedPkts);
+                rrddim_set(st, "InCsumErrors", ipext_InCsumErrors);
                 rrdset_done(st);
             }
 
             // --------------------------------------------------------------------
 
-            if(do_mcast == CONFIG_ONDEMAND_YES || (do_mcast == CONFIG_ONDEMAND_ONDEMAND && (*ipext_InMcastOctets || *ipext_OutMcastOctets))) {
+            if(do_mcast == CONFIG_ONDEMAND_YES || (do_mcast == CONFIG_ONDEMAND_ONDEMAND && (ipext_InMcastOctets || ipext_OutMcastOctets))) {
                 do_mcast = CONFIG_ONDEMAND_YES;
                 st = rrdset_find("ipv4.mcast");
-                if(!st) {
+                if(unlikely(!st)) {
                     st = rrdset_create("ipv4", "mcast", NULL, "multicast", NULL, "IPv4 Multicast Bandwidth", "kilobits/s", 9000, update_every, RRDSET_TYPE_AREA);
                     st->isdetail = 1;
 
@@ -626,17 +277,17 @@ int do_proc_net_netstat(int update_every, unsigned long long dt) {
                 }
                 else rrdset_next(st);
 
-                rrddim_set(st, "InMcastOctets", *ipext_InMcastOctets);
-                rrddim_set(st, "OutMcastOctets", *ipext_OutMcastOctets);
+                rrddim_set(st, "InMcastOctets", ipext_InMcastOctets);
+                rrddim_set(st, "OutMcastOctets", ipext_OutMcastOctets);
                 rrdset_done(st);
             }
 
             // --------------------------------------------------------------------
 
-            if(do_bcast == CONFIG_ONDEMAND_YES || (do_bcast == CONFIG_ONDEMAND_ONDEMAND && (*ipext_InBcastOctets || *ipext_OutBcastOctets))) {
+            if(do_bcast == CONFIG_ONDEMAND_YES || (do_bcast == CONFIG_ONDEMAND_ONDEMAND && (ipext_InBcastOctets || ipext_OutBcastOctets))) {
                 do_bcast = CONFIG_ONDEMAND_YES;
                 st = rrdset_find("ipv4.bcast");
-                if(!st) {
+                if(unlikely(!st)) {
                     st = rrdset_create("ipv4", "bcast", NULL, "broadcast", NULL, "IPv4 Broadcast Bandwidth", "kilobits/s", 8000, update_every, RRDSET_TYPE_AREA);
                     st->isdetail = 1;
 
@@ -645,17 +296,17 @@ int do_proc_net_netstat(int update_every, unsigned long long dt) {
                 }
                 else rrdset_next(st);
 
-                rrddim_set(st, "InBcastOctets", *ipext_InBcastOctets);
-                rrddim_set(st, "OutBcastOctets", *ipext_OutBcastOctets);
+                rrddim_set(st, "InBcastOctets", ipext_InBcastOctets);
+                rrddim_set(st, "OutBcastOctets", ipext_OutBcastOctets);
                 rrdset_done(st);
             }
 
             // --------------------------------------------------------------------
 
-            if(do_mcast_p == CONFIG_ONDEMAND_YES || (do_mcast_p == CONFIG_ONDEMAND_ONDEMAND && (*ipext_InMcastPkts || *ipext_OutMcastPkts))) {
+            if(do_mcast_p == CONFIG_ONDEMAND_YES || (do_mcast_p == CONFIG_ONDEMAND_ONDEMAND && (ipext_InMcastPkts || ipext_OutMcastPkts))) {
                 do_mcast_p = CONFIG_ONDEMAND_YES;
                 st = rrdset_find("ipv4.mcastpkts");
-                if(!st) {
+                if(unlikely(!st)) {
                     st = rrdset_create("ipv4", "mcastpkts", NULL, "multicast", NULL, "IPv4 Multicast Packets", "packets/s", 8600, update_every, RRDSET_TYPE_LINE);
                     st->isdetail = 1;
 
@@ -664,17 +315,17 @@ int do_proc_net_netstat(int update_every, unsigned long long dt) {
                 }
                 else rrdset_next(st);
 
-                rrddim_set(st, "InMcastPkts", *ipext_InMcastPkts);
-                rrddim_set(st, "OutMcastPkts", *ipext_OutMcastPkts);
+                rrddim_set(st, "InMcastPkts", ipext_InMcastPkts);
+                rrddim_set(st, "OutMcastPkts", ipext_OutMcastPkts);
                 rrdset_done(st);
             }
 
             // --------------------------------------------------------------------
 
-            if(do_bcast_p == CONFIG_ONDEMAND_YES || (do_bcast_p == CONFIG_ONDEMAND_ONDEMAND && (*ipext_InBcastPkts || *ipext_OutBcastPkts))) {
+            if(do_bcast_p == CONFIG_ONDEMAND_YES || (do_bcast_p == CONFIG_ONDEMAND_ONDEMAND && (ipext_InBcastPkts || ipext_OutBcastPkts))) {
                 do_bcast_p = CONFIG_ONDEMAND_YES;
                 st = rrdset_find("ipv4.bcastpkts");
-                if(!st) {
+                if(unlikely(!st)) {
                     st = rrdset_create("ipv4", "bcastpkts", NULL, "broadcast", NULL, "IPv4 Broadcast Packets", "packets/s", 8500, update_every, RRDSET_TYPE_LINE);
                     st->isdetail = 1;
 
@@ -683,17 +334,17 @@ int do_proc_net_netstat(int update_every, unsigned long long dt) {
                 }
                 else rrdset_next(st);
 
-                rrddim_set(st, "InBcastPkts", *ipext_InBcastPkts);
-                rrddim_set(st, "OutBcastPkts", *ipext_OutBcastPkts);
+                rrddim_set(st, "InBcastPkts", ipext_InBcastPkts);
+                rrddim_set(st, "OutBcastPkts", ipext_OutBcastPkts);
                 rrdset_done(st);
             }
 
             // --------------------------------------------------------------------
 
-            if(do_ecn == CONFIG_ONDEMAND_YES || (do_ecn == CONFIG_ONDEMAND_ONDEMAND && (*ipext_InCEPkts || *ipext_InECT0Pkts || *ipext_InECT1Pkts || *ipext_InNoECTPkts))) {
+            if(do_ecn == CONFIG_ONDEMAND_YES || (do_ecn == CONFIG_ONDEMAND_ONDEMAND && (ipext_InCEPkts || ipext_InECT0Pkts || ipext_InECT1Pkts || ipext_InNoECTPkts))) {
                 do_ecn = CONFIG_ONDEMAND_YES;
                 st = rrdset_find("ipv4.ecnpkts");
-                if(!st) {
+                if(unlikely(!st)) {
                     st = rrdset_create("ipv4", "ecnpkts", NULL, "ecn", NULL, "IPv4 ECN Statistics", "packets/s", 8700, update_every, RRDSET_TYPE_LINE);
                     st->isdetail = 1;
 
@@ -704,52 +355,49 @@ int do_proc_net_netstat(int update_every, unsigned long long dt) {
                 }
                 else rrdset_next(st);
 
-                rrddim_set(st, "InCEPkts", *ipext_InCEPkts);
-                rrddim_set(st, "InNoECTPkts", *ipext_InNoECTPkts);
-                rrddim_set(st, "InECT0Pkts", *ipext_InECT0Pkts);
-                rrddim_set(st, "InECT1Pkts", *ipext_InECT1Pkts);
+                rrddim_set(st, "InCEPkts", ipext_InCEPkts);
+                rrddim_set(st, "InNoECTPkts", ipext_InNoECTPkts);
+                rrddim_set(st, "InECT0Pkts", ipext_InECT0Pkts);
+                rrddim_set(st, "InECT1Pkts", ipext_InECT1Pkts);
                 rrdset_done(st);
             }
         }
         else if(unlikely(hash == hash_tcpext && strcmp(key, "TcpExt") == 0)) {
-            uint32_t h = l++;
+            size_t h = l++;
 
-            if(strcmp(procfile_lineword(ff, l, 0), "TcpExt") != 0) {
-                error("Cannot read TcpExt line from /proc/net/netstat.");
-                break;
-            }
             words = procfile_linewords(ff, l);
-            if(words < 2) {
-                error("Cannot read /proc/net/netstat TcpExt line. Expected 2+ params, read %u.", words);
+            if(unlikely(words < 2)) {
+                error("Cannot read /proc/net/netstat TcpExt line. Expected 2+ params, read %zu.", words);
                 continue;
             }
 
-            parse_line_pair(ff, tcpext_data, h, l);
+            arl_begin(arl_tcpext);
+            parse_line_pair(ff, arl_tcpext, h, l);
 
             RRDSET *st;
 
             // --------------------------------------------------------------------
 
-            if(do_tcpext_memory == CONFIG_ONDEMAND_YES || (do_tcpext_memory == CONFIG_ONDEMAND_ONDEMAND && (*tcpext_TCPMemoryPressures))) {
+            if(do_tcpext_memory == CONFIG_ONDEMAND_YES || (do_tcpext_memory == CONFIG_ONDEMAND_ONDEMAND && (tcpext_TCPMemoryPressures))) {
                 do_tcpext_memory = CONFIG_ONDEMAND_YES;
                 st = rrdset_find("ipv4.tcpmemorypressures");
-                if(!st) {
+                if(unlikely(!st)) {
                     st = rrdset_create("ipv4", "tcpmemorypressures", NULL, "tcp", NULL, "TCP Memory Pressures", "events/s", 3000, update_every, RRDSET_TYPE_LINE);
 
                     rrddim_add(st, "TCPMemoryPressures",   "pressures",  1, 1, RRDDIM_INCREMENTAL);
                 }
                 else rrdset_next(st);
 
-                rrddim_set(st, "TCPMemoryPressures", *tcpext_TCPMemoryPressures);
+                rrddim_set(st, "TCPMemoryPressures", tcpext_TCPMemoryPressures);
                 rrdset_done(st);
             }
 
             // --------------------------------------------------------------------
 
-            if(do_tcpext_connaborts == CONFIG_ONDEMAND_YES || (do_tcpext_connaborts == CONFIG_ONDEMAND_ONDEMAND && (*tcpext_TCPAbortOnData || *tcpext_TCPAbortOnClose || *tcpext_TCPAbortOnMemory || *tcpext_TCPAbortOnTimeout || *tcpext_TCPAbortOnLinger || *tcpext_TCPAbortFailed))) {
+            if(do_tcpext_connaborts == CONFIG_ONDEMAND_YES || (do_tcpext_connaborts == CONFIG_ONDEMAND_ONDEMAND && (tcpext_TCPAbortOnData || tcpext_TCPAbortOnClose || tcpext_TCPAbortOnMemory || tcpext_TCPAbortOnTimeout || tcpext_TCPAbortOnLinger || tcpext_TCPAbortFailed))) {
                 do_tcpext_connaborts = CONFIG_ONDEMAND_YES;
                 st = rrdset_find("ipv4.tcpconnaborts");
-                if(!st) {
+                if(unlikely(!st)) {
                     st = rrdset_create("ipv4", "tcpconnaborts", NULL, "tcp", NULL, "TCP Connection Aborts", "connections/s", 3010, update_every, RRDSET_TYPE_LINE);
 
                     rrddim_add(st, "TCPAbortOnData",    "baddata",     1, 1, RRDDIM_INCREMENTAL);
@@ -761,20 +409,20 @@ int do_proc_net_netstat(int update_every, unsigned long long dt) {
                 }
                 else rrdset_next(st);
 
-                rrddim_set(st, "TCPAbortOnData",    *tcpext_TCPAbortOnData);
-                rrddim_set(st, "TCPAbortOnClose",   *tcpext_TCPAbortOnClose);
-                rrddim_set(st, "TCPAbortOnMemory",  *tcpext_TCPAbortOnMemory);
-                rrddim_set(st, "TCPAbortOnTimeout", *tcpext_TCPAbortOnTimeout);
-                rrddim_set(st, "TCPAbortOnLinger",  *tcpext_TCPAbortOnLinger);
-                rrddim_set(st, "TCPAbortFailed",    *tcpext_TCPAbortFailed);
+                rrddim_set(st, "TCPAbortOnData",    tcpext_TCPAbortOnData);
+                rrddim_set(st, "TCPAbortOnClose",   tcpext_TCPAbortOnClose);
+                rrddim_set(st, "TCPAbortOnMemory",  tcpext_TCPAbortOnMemory);
+                rrddim_set(st, "TCPAbortOnTimeout", tcpext_TCPAbortOnTimeout);
+                rrddim_set(st, "TCPAbortOnLinger",  tcpext_TCPAbortOnLinger);
+                rrddim_set(st, "TCPAbortFailed",    tcpext_TCPAbortFailed);
                 rrdset_done(st);
             }
             // --------------------------------------------------------------------
 
-            if(do_tcpext_reorder == CONFIG_ONDEMAND_YES || (do_tcpext_reorder == CONFIG_ONDEMAND_ONDEMAND && (*tcpext_TCPRenoReorder || *tcpext_TCPFACKReorder || *tcpext_TCPSACKReorder || *tcpext_TCPTSReorder))) {
+            if(do_tcpext_reorder == CONFIG_ONDEMAND_YES || (do_tcpext_reorder == CONFIG_ONDEMAND_ONDEMAND && (tcpext_TCPRenoReorder || tcpext_TCPFACKReorder || tcpext_TCPSACKReorder || tcpext_TCPTSReorder))) {
                 do_tcpext_reorder = CONFIG_ONDEMAND_YES;
                 st = rrdset_find("ipv4.tcpreorders");
-                if(!st) {
+                if(unlikely(!st)) {
                     st = rrdset_create("ipv4", "tcpreorders", NULL, "tcp", NULL, "TCP Reordered Packets by Detection Method", "packets/s", 3020, update_every, RRDSET_TYPE_LINE);
 
                     rrddim_add(st, "TCPTSReorder",   "timestamp",   1, 1, RRDDIM_INCREMENTAL);
@@ -784,19 +432,19 @@ int do_proc_net_netstat(int update_every, unsigned long long dt) {
                 }
                 else rrdset_next(st);
 
-                rrddim_set(st, "TCPTSReorder",   *tcpext_TCPTSReorder);
-                rrddim_set(st, "TCPSACKReorder", *tcpext_TCPSACKReorder);
-                rrddim_set(st, "TCPFACKReorder", *tcpext_TCPFACKReorder);
-                rrddim_set(st, "TCPRenoReorder", *tcpext_TCPRenoReorder);
+                rrddim_set(st, "TCPTSReorder",   tcpext_TCPTSReorder);
+                rrddim_set(st, "TCPSACKReorder", tcpext_TCPSACKReorder);
+                rrddim_set(st, "TCPFACKReorder", tcpext_TCPFACKReorder);
+                rrddim_set(st, "TCPRenoReorder", tcpext_TCPRenoReorder);
                 rrdset_done(st);
             }
 
             // --------------------------------------------------------------------
 
-            if(do_tcpext_ofo == CONFIG_ONDEMAND_YES || (do_tcpext_ofo == CONFIG_ONDEMAND_ONDEMAND && (*tcpext_TCPOFOQueue || *tcpext_TCPOFODrop || *tcpext_TCPOFOMerge))) {
+            if(do_tcpext_ofo == CONFIG_ONDEMAND_YES || (do_tcpext_ofo == CONFIG_ONDEMAND_ONDEMAND && (tcpext_TCPOFOQueue || tcpext_TCPOFODrop || tcpext_TCPOFOMerge))) {
                 do_tcpext_ofo = CONFIG_ONDEMAND_YES;
                 st = rrdset_find("ipv4.tcpofo");
-                if(!st) {
+                if(unlikely(!st)) {
                     st = rrdset_create("ipv4", "tcpofo", NULL, "tcp", NULL, "TCP Out-Of-Order Queue", "packets/s", 3050, update_every, RRDSET_TYPE_LINE);
 
                     rrddim_add(st, "TCPOFOQueue", "inqueue",  1, 1, RRDDIM_INCREMENTAL);
@@ -806,19 +454,19 @@ int do_proc_net_netstat(int update_every, unsigned long long dt) {
                 }
                 else rrdset_next(st);
 
-                rrddim_set(st, "TCPOFOQueue",   *tcpext_TCPOFOQueue);
-                rrddim_set(st, "TCPOFODrop",    *tcpext_TCPOFODrop);
-                rrddim_set(st, "TCPOFOMerge",   *tcpext_TCPOFOMerge);
-                rrddim_set(st, "OfoPruned",     *tcpext_OfoPruned);
+                rrddim_set(st, "TCPOFOQueue",   tcpext_TCPOFOQueue);
+                rrddim_set(st, "TCPOFODrop",    tcpext_TCPOFODrop);
+                rrddim_set(st, "TCPOFOMerge",   tcpext_TCPOFOMerge);
+                rrddim_set(st, "OfoPruned",     tcpext_OfoPruned);
                 rrdset_done(st);
             }
 
             // --------------------------------------------------------------------
 
-            if(do_tcpext_syscookies == CONFIG_ONDEMAND_YES || (do_tcpext_syscookies == CONFIG_ONDEMAND_ONDEMAND && (*tcpext_SyncookiesSent || *tcpext_SyncookiesRecv || *tcpext_SyncookiesFailed))) {
+            if(do_tcpext_syscookies == CONFIG_ONDEMAND_YES || (do_tcpext_syscookies == CONFIG_ONDEMAND_ONDEMAND && (tcpext_SyncookiesSent || tcpext_SyncookiesRecv || tcpext_SyncookiesFailed))) {
                 do_tcpext_syscookies = CONFIG_ONDEMAND_YES;
                 st = rrdset_find("ipv4.tcpsyncookies");
-                if(!st) {
+                if(unlikely(!st)) {
                     st = rrdset_create("ipv4", "tcpsyncookies", NULL, "tcp", NULL, "TCP SYN Cookies", "packets/s", 3100, update_every, RRDSET_TYPE_LINE);
 
                     rrddim_add(st, "SyncookiesRecv",   "received",  1, 1, RRDDIM_INCREMENTAL);
@@ -827,9 +475,9 @@ int do_proc_net_netstat(int update_every, unsigned long long dt) {
                 }
                 else rrdset_next(st);
 
-                rrddim_set(st, "SyncookiesRecv",   *tcpext_SyncookiesRecv);
-                rrddim_set(st, "SyncookiesSent",   *tcpext_SyncookiesSent);
-                rrddim_set(st, "SyncookiesFailed", *tcpext_SyncookiesFailed);
+                rrddim_set(st, "SyncookiesRecv",   tcpext_SyncookiesRecv);
+                rrddim_set(st, "SyncookiesSent",   tcpext_SyncookiesSent);
+                rrddim_set(st, "SyncookiesFailed", tcpext_SyncookiesFailed);
                 rrdset_done(st);
             }