snmp: T6290: add custom package build

(cherry picked from commit 56bc5a517c266fe15e9b331852826dfdd6f97b00)

4 files changed, 180 insertions, 0 deletions

diff --git a/packages/net-snmp/.gitignore b/packages/net-snmp/.gitignore
new file mode 100644
index 00000000..3f41bbac
--- /dev/null
+++ b/packages/net-snmp/.gitignore
@@ -0,0 +1 @@
+net-snmp/
diff --git a/packages/net-snmp/Jenkinsfile b/packages/net-snmp/Jenkinsfile
new file mode 100644
index 00000000..e841b1b4
--- /dev/null
+++ b/packages/net-snmp/Jenkinsfile
@@ -0,0 +1,30 @@
+// Copyright (C) 2024 VyOS maintainers and contributors
+//
+// This program is free software; you can redistribute it and/or modify
+// in order to easy exprort images built to "external" world
+// it under the terms of the GNU General Public License version 2 or later as
+// published by the Free Software Foundation.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+@NonCPS
+
+// Using a version specifier library, use 'current' branch. The underscore (_)
+// is not a typo! You need this underscore if the line immediately after the
+// @Library annotation is not an import statement!
+@Library('vyos-build@sagitta')_
+
+def pkgList = [
+    ['name': 'net-snmp',
+     'scmCommit': 'debian/5.9.4+dfsg-1',
+     'scmUrl': 'https://salsa.debian.org/debian/net-snmp',
+     'buildCmd': 'sudo mk-build-deps --install --tool "apt-get --yes --no-install-recommends"; cd ..; ./build.sh'],
+]
+
+// Start package build using library function from https://github.com/vyos/vyos-build
+buildPackage('net-snmp', pkgList, null, true, "**/packages/net-snmp/**")
diff --git a/packages/net-snmp/build.sh b/packages/net-snmp/build.sh
new file mode 100755
index 00000000..ebaeb6eb
--- /dev/null
+++ b/packages/net-snmp/build.sh
@@ -0,0 +1,30 @@
+#!/bin/sh
+CWD=$(pwd)
+set -e
+
+SRC=net-snmp
+
+if [ ! -d ${SRC} ]; then
+    echo "Source directory does not exists, please 'git clone'"
+    exit 1
+fi
+
+cd ${SRC}
+
+PATCH_DIR=${CWD}/patches
+if [ -d $PATCH_DIR ]; then
+    echo "I: Apply SNMP patches not in main repository:"
+    for patch in $(ls ${PATCH_DIR})
+    do
+        cp ${PATCH_DIR}/${patch} debian/patches
+        echo ${patch} >> debian/patches/series
+    done
+fi
+
+echo "I: Build Debian net-snmp Package"
+# We need "|| true" to fix an issue wioth the make system
+#make[2]: Leaving directory '/vyos/vyos-build/packages/net-snmp/net-snmp/snmplib'
+#making clean in /vyos/vyos-build/packages/net-snmp/net-snmp/agent
+#make[2]: Entering directory '/vyos/vyos-build/packages/net-snmp/net-snmp/agent'
+#make[2]: *** No rule to make target 'clean'.  Stop.
+dpkg-buildpackage -us -uc -tc -b || true
diff --git a/packages/net-snmp/patches/add-linux-6.7-compatibility-parsing.patch b/packages/net-snmp/patches/add-linux-6.7-compatibility-parsing.patch
new file mode 100644
index 00000000..b6dcd77a
--- /dev/null
+++ b/packages/net-snmp/patches/add-linux-6.7-compatibility-parsing.patch
@@ -0,0 +1,119 @@
+From f5ae6baf0018abda9dedc368fe6d52c0d7a8ab8f Mon Sep 17 00:00:00 2001
+From: Philippe Troin <phil+github-commits@fifi.org>
+Date: Sat, 3 Feb 2024 10:30:30 -0800
+Subject: [PATCH] Add Linux 6.7 compatibility parsing /proc/net/snmp
+
+Linux 6.7 adds a new OutTransmits field to Ip in /proc/net/snmp.
+This breaks the hard-coded assumptions about the Ip line length.
+Add compatibility to parse Linux 6.7 Ip header while keep support
+for previous versions.
+---
+ .../ip-mib/data_access/systemstats_linux.c    | 46 +++++++++++++++----
+ 1 file changed, 37 insertions(+), 9 deletions(-)
+
+diff --git a/agent/mibgroup/ip-mib/data_access/systemstats_linux.c b/agent/mibgroup/ip-mib/data_access/systemstats_linux.c
+index 49e0a34d5c..f04e828a94 100644
+--- a/agent/mibgroup/ip-mib/data_access/systemstats_linux.c
++++ b/agent/mibgroup/ip-mib/data_access/systemstats_linux.c
+@@ -36,7 +36,7 @@ netsnmp_access_systemstats_arch_init(void)
+ }
+ 
+ /*
+-  /proc/net/snmp
++  /proc/net/snmp - Linux 6.6 and lower
+ 
+   Ip: Forwarding DefaultTTL InReceives InHdrErrors InAddrErrors ForwDatagrams InUnknownProtos InDiscards InDelivers OutRequests OutDiscards OutNoRoutes ReasmTimeout ReasmReqds ReasmOKs ReasmFails FragOKs FragFails FragCreates
+   Ip: 2 64 7083534 0 0 0 0 0 6860233 6548963 0 0 1 286623 63322 1 259920 0 0
+@@ -49,6 +49,26 @@ netsnmp_access_systemstats_arch_init(void)
+   
+   Udp: InDatagrams NoPorts InErrors OutDatagrams
+   Udp: 1491094 122 0 1466178
++*
++  /proc/net/snmp - Linux 6.7 and higher
++
++  Ip: Forwarding DefaultTTL InReceives InHdrErrors InAddrErrors ForwDatagrams InUnknownProtos InDiscards InDelivers OutRequests OutDiscards OutNoRoutes ReasmTimeout ReasmReqds ReasmOKs ReasmFails FragOKs FragFails FragCreates OutTransmits
++  Ip: 1 64 50859058 496 0 37470604 0 0 20472980 7515791 1756 0 0 7264 3632 0 3548 0 7096 44961424
++
++  Icmp: InMsgs InErrors InCsumErrors InDestUnreachs InTimeExcds InParmProbs InSrcQuenchs InRedirects InEchos InEchoReps InTimestamps InTimestampReps InAddrMasks InAddrMaskReps OutMsgs OutErrors OutRateLimitGlobal OutRateLimitHost OutDestUnreachs OutTimeExcds OutParmProbs OutSrcQuenchs OutRedirects OutEchos OutEchoReps OutTimestamps OutTimestampReps OutAddrMasks OutAddrMaskReps
++  Icmp: 114447 2655 0 17589 0 0 0 0 66905 29953 0 0 0 0 143956 0 0 572 16610 484 0 0 0 59957 66905 0 0 0 0
++
++  IcmpMsg: InType0 InType3 InType8 OutType0 OutType3 OutType8 OutType11
++  IcmpMsg: 29953 17589 66905 66905 16610 59957 484
++
++  Tcp: RtoAlgorithm RtoMin RtoMax MaxConn ActiveOpens PassiveOpens AttemptFails EstabResets CurrEstab InSegs OutSegs RetransSegs InErrs OutRsts InCsumErrors
++  Tcp: 1 200 120000 -1 17744 13525 307 3783 6 18093137 9277788 3499 8 7442 0
++
++  Udp: InDatagrams NoPorts InErrors OutDatagrams RcvbufErrors SndbufErrors InCsumErrors IgnoredMulti MemErrors
++  Udp: 2257832 1422 0 2252835 0 0 0 84 0
++
++  UdpLite: InDatagrams NoPorts InErrors OutDatagrams RcvbufErrors SndbufErrors InCsumErrors IgnoredMulti MemErrors
++  UdpLite: 0 0 0 0 0 0 0 0 0
+ */
+ 
+ 
+@@ -101,10 +121,10 @@ _systemstats_v4(netsnmp_container* container, u_int load_flags)
+     FILE           *devin;
+     char            line[1024];
+     netsnmp_systemstats_entry *entry = NULL;
+-    int             scan_count;
++    int             scan_count, expected_scan_count;
+     char           *stats, *start = line;
+     int             len;
+-    unsigned long long scan_vals[19];
++    unsigned long long scan_vals[20];
+ 
+     DEBUGMSGTL(("access:systemstats:container:arch", "load v4 (flags %x)\n",
+                 load_flags));
+@@ -126,10 +146,17 @@ _systemstats_v4(netsnmp_container* container, u_int load_flags)
+      */
+     NETSNMP_IGNORE_RESULT(fgets(line, sizeof(line), devin));
+     len = strlen(line);
+-    if (224 != len) {
++    switch (len) {
++    case 224:
++	expected_scan_count = 19;
++	break;
++    case 237:
++	expected_scan_count = 20;
++	break;
++    default:
+         fclose(devin);
+         snmp_log(LOG_ERR, "systemstats_linux: unexpected header length in /proc/net/snmp."
+-                 " %d != 224\n", len);
++                 " %d not in { 224, 237 } \n", len);
+         return -4;
+     }
+ 
+@@ -178,20 +205,20 @@ _systemstats_v4(netsnmp_container* container, u_int load_flags)
+         memset(scan_vals, 0x0, sizeof(scan_vals));
+         scan_count = sscanf(stats,
+                             "%llu %llu %llu %llu %llu %llu %llu %llu %llu %llu"
+-                            "%llu %llu %llu %llu %llu %llu %llu %llu %llu",
++                            "%llu %llu %llu %llu %llu %llu %llu %llu %llu %llu",
+                             &scan_vals[0],&scan_vals[1],&scan_vals[2],
+                             &scan_vals[3],&scan_vals[4],&scan_vals[5],
+                             &scan_vals[6],&scan_vals[7],&scan_vals[8],
+                             &scan_vals[9],&scan_vals[10],&scan_vals[11],
+                             &scan_vals[12],&scan_vals[13],&scan_vals[14],
+                             &scan_vals[15],&scan_vals[16],&scan_vals[17],
+-                            &scan_vals[18]);
++                            &scan_vals[18],&scan_vals[19]);
+         DEBUGMSGTL(("access:systemstats", "  read %d values\n", scan_count));
+ 
+-        if(scan_count != 19) {
++        if(scan_count != expected_scan_count) {
+             snmp_log(LOG_ERR,
+                      "error scanning systemstats data (expected %d, got %d)\n",
+-                     19, scan_count);
++                     expected_scan_count, scan_count);
+             netsnmp_access_systemstats_entry_free(entry);
+             return -4;
+         }
+@@ -223,6 +250,7 @@ _systemstats_v4(netsnmp_container* container, u_int load_flags)
+         entry->stats.HCOutFragFails.high = scan_vals[17] >> 32;
+         entry->stats.HCOutFragCreates.low = scan_vals[18] & 0xffffffff;
+         entry->stats.HCOutFragCreates.high = scan_vals[18] >> 32;
++        /* entry->stats. = scan_vals[19]; / * OutTransmits */
+ 
+         entry->stats.columnAvail[IPSYSTEMSTATSTABLE_HCINRECEIVES] = 1;
+         entry->stats.columnAvail[IPSYSTEMSTATSTABLE_INHDRERRORS] = 1;