Merging upstream version 1.11.0+dfsg.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 185 insertions, 0 deletions

diff --git a/collectors/proc.plugin/proc_net_stat_synproxy.c b/collectors/proc.plugin/proc_net_stat_synproxy.c
new file mode 100644
index 000000000..f0c1f47c1
--- /dev/null
+++ b/collectors/proc.plugin/proc_net_stat_synproxy.c
@@ -0,0 +1,185 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "plugin_proc.h"
+
+#define PLUGIN_PROC_MODULE_SYNPROXY_NAME "/proc/net/stat/synproxy"
+
+#define RRD_TYPE_NET_STAT_NETFILTER         "netfilter"
+#define RRD_TYPE_NET_STAT_SYNPROXY          "synproxy"
+
+int do_proc_net_stat_synproxy(int update_every, usec_t dt) {
+    (void)dt;
+
+    static int do_entries = -1, do_cookies = -1, do_syns = -1, do_reopened = -1;
+    static procfile *ff = NULL;
+
+    if(unlikely(do_entries == -1)) {
+        do_entries  = config_get_boolean_ondemand("plugin:proc:/proc/net/stat/synproxy", "SYNPROXY entries", CONFIG_BOOLEAN_AUTO);
+        do_cookies  = config_get_boolean_ondemand("plugin:proc:/proc/net/stat/synproxy", "SYNPROXY cookies", CONFIG_BOOLEAN_AUTO);
+        do_syns     = config_get_boolean_ondemand("plugin:proc:/proc/net/stat/synproxy", "SYNPROXY SYN received", CONFIG_BOOLEAN_AUTO);
+        do_reopened = config_get_boolean_ondemand("plugin:proc:/proc/net/stat/synproxy", "SYNPROXY connections reopened", CONFIG_BOOLEAN_AUTO);
+    }
+
+    if(unlikely(!ff)) {
+        char filename[FILENAME_MAX + 1];
+        snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/proc/net/stat/synproxy");
+        ff = procfile_open(config_get("plugin:proc:/proc/net/stat/synproxy", "filename to monitor", filename), " \t,:|", PROCFILE_FLAG_DEFAULT);
+        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
+
+    // make sure we have 3 lines
+    size_t lines = procfile_lines(ff), l;
+    if(unlikely(lines < 2)) {
+        error("/proc/net/stat/synproxy has %zu lines, expected no less than 2. Disabling it.", lines);
+        return 1;
+    }
+
+    unsigned long long entries = 0, syn_received = 0, cookie_invalid = 0, cookie_valid = 0, cookie_retrans = 0, conn_reopened = 0;
+
+    // synproxy gives its values per CPU
+    for(l = 1; l < lines ;l++) {
+        size_t words = procfile_linewords(ff, l);
+        if(unlikely(words < 6))
+            continue;
+
+        entries         += strtoull(procfile_lineword(ff, l, 0), NULL, 16);
+        syn_received    += strtoull(procfile_lineword(ff, l, 1), NULL, 16);
+        cookie_invalid  += strtoull(procfile_lineword(ff, l, 2), NULL, 16);
+        cookie_valid    += strtoull(procfile_lineword(ff, l, 3), NULL, 16);
+        cookie_retrans  += strtoull(procfile_lineword(ff, l, 4), NULL, 16);
+        conn_reopened   += strtoull(procfile_lineword(ff, l, 5), NULL, 16);
+    }
+
+    unsigned long long events = entries + syn_received + cookie_invalid + cookie_valid + cookie_retrans + conn_reopened;
+
+    // --------------------------------------------------------------------
+
+    if((do_entries == CONFIG_BOOLEAN_AUTO && events) || do_entries == CONFIG_BOOLEAN_YES) {
+        do_entries = CONFIG_BOOLEAN_YES;
+
+        static RRDSET *st = NULL;
+        if(unlikely(!st)) {
+            st = rrdset_create_localhost(
+                    RRD_TYPE_NET_STAT_NETFILTER
+                    , RRD_TYPE_NET_STAT_SYNPROXY "_entries"
+                    , NULL
+                    , RRD_TYPE_NET_STAT_SYNPROXY
+                    , NULL
+                    , "SYNPROXY Entries Used"
+                    , "entries"
+                    , PLUGIN_PROC_NAME
+                    , PLUGIN_PROC_MODULE_SYNPROXY_NAME
+                    , NETDATA_CHART_PRIO_SYNPROXY_ENTRIES
+                    , update_every
+                    , RRDSET_TYPE_LINE
+            );
+
+            rrddim_add(st, "entries", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
+        }
+        else rrdset_next(st);
+
+        rrddim_set(st, "entries", entries);
+        rrdset_done(st);
+    }
+
+    // --------------------------------------------------------------------
+
+    if((do_syns == CONFIG_BOOLEAN_AUTO && events) || do_syns == CONFIG_BOOLEAN_YES) {
+        do_syns = CONFIG_BOOLEAN_YES;
+
+        static RRDSET *st = NULL;
+        if(unlikely(!st)) {
+            st = rrdset_create_localhost(
+                    RRD_TYPE_NET_STAT_NETFILTER
+                    , RRD_TYPE_NET_STAT_SYNPROXY "_syn_received"
+                    , NULL
+                    , RRD_TYPE_NET_STAT_SYNPROXY
+                    , NULL
+                    , "SYNPROXY SYN Packets received"
+                    , "SYN/s"
+                    , PLUGIN_PROC_NAME
+                    , PLUGIN_PROC_MODULE_SYNPROXY_NAME
+                    , NETDATA_CHART_PRIO_SYNPROXY_SYN_RECEIVED
+                    , update_every
+                    , RRDSET_TYPE_LINE
+            );
+
+            rrddim_add(st, "received", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+        }
+        else rrdset_next(st);
+
+        rrddim_set(st, "received", syn_received);
+        rrdset_done(st);
+    }
+
+    // --------------------------------------------------------------------
+
+    if((do_reopened == CONFIG_BOOLEAN_AUTO && events) || do_reopened == CONFIG_BOOLEAN_YES) {
+        do_reopened = CONFIG_BOOLEAN_YES;
+
+        static RRDSET *st = NULL;
+        if(unlikely(!st)) {
+            st = rrdset_create_localhost(
+                    RRD_TYPE_NET_STAT_NETFILTER
+                    , RRD_TYPE_NET_STAT_SYNPROXY "_conn_reopened"
+                    , NULL
+                    , RRD_TYPE_NET_STAT_SYNPROXY
+                    , NULL
+                    , "SYNPROXY Connections Reopened"
+                    , "connections/s"
+                    , PLUGIN_PROC_NAME
+                    , PLUGIN_PROC_MODULE_SYNPROXY_NAME
+                    , NETDATA_CHART_PRIO_SYNPROXY_CONN_OPEN
+                    , update_every
+                    , RRDSET_TYPE_LINE
+            );
+
+            rrddim_add(st, "reopened", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+        }
+        else rrdset_next(st);
+
+        rrddim_set(st, "reopened", conn_reopened);
+        rrdset_done(st);
+    }
+
+    // --------------------------------------------------------------------
+
+    if((do_cookies == CONFIG_BOOLEAN_AUTO && events) || do_cookies == CONFIG_BOOLEAN_YES) {
+        do_cookies = CONFIG_BOOLEAN_YES;
+
+        static RRDSET *st = NULL;
+        if(unlikely(!st)) {
+            st = rrdset_create_localhost(
+                    RRD_TYPE_NET_STAT_NETFILTER
+                    , RRD_TYPE_NET_STAT_SYNPROXY "_cookies"
+                    , NULL
+                    , RRD_TYPE_NET_STAT_SYNPROXY
+                    , NULL
+                    , "SYNPROXY TCP Cookies"
+                    , "cookies/s"
+                    , PLUGIN_PROC_NAME
+                    , PLUGIN_PROC_MODULE_SYNPROXY_NAME
+                    , NETDATA_CHART_PRIO_SYNPROXY_COOKIES
+                    , update_every
+                    , RRDSET_TYPE_LINE
+            );
+
+            rrddim_add(st, "valid", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+            rrddim_add(st, "invalid", NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL);
+            rrddim_add(st, "retransmits", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+        }
+        else rrdset_next(st);
+
+        rrddim_set(st, "valid", cookie_valid);
+        rrddim_set(st, "invalid", cookie_invalid);
+        rrddim_set(st, "retransmits", cookie_retrans);
+        rrdset_done(st);
+    }
+
+    return 0;
+}