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net-snmp: modify init script for SNMPv3

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This commit adds function 'snmpd_snmpv3_add' to the init script
to support SNMPv3 config parsing.

The new uci config section has the following configuration parameters:

config v3
	option username 'John'
	option allow_write '0'
	option auth_type 'SHA|MD5'
	option auth_pass 'passphrase'
	option privacy_type 'AES|DES'
	option privacy_pass 'passphrase'
	option RestrictOID 'yes|no'
	option RestrictedOID '1.3.6.1.2.1.1.1'

This new section is only relevant if the snmp_version 'v1/v2c/v3' or 'v3'
is set in the uci section 'general'.

Signed-off-by: Christian Korber <ck@dev.tdt.de>
Signed-off-by: Florian Eckert <fe@dev.tdt.de>
This commit is contained in:
Christian Korber
2025-03-25 20:51:02 +01:00
committed by Florian Eckert
parent 7013ea4bce
commit 2fc221699d
3 changed files with 77 additions and 2 deletions
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1
net/net-snmp/Makefile
View File

@@ -333,7 +333,6 @@ define Package/snmpd-nossl/install
$(INSTALL_DIR) $(1)/etc/config
$(INSTALL_DATA) ./files/snmpd.conf $(1)/etc/config/snmpd
$(INSTALL_DIR) $(1)/etc/snmp
$(LN) /var/run/snmpd.conf $(1)/etc/snmp/
$(INSTALL_DIR) $(1)/etc/init.d
$(INSTALL_BIN) ./files/snmpd.init $(1)/etc/init.d/snmpd
$(INSTALL_DIR) $(1)/usr/sbin

10
net/net-snmp/files/snmpd.conf
View File

@@ -128,3 +128,13 @@ config engineid
config snmpd general
option enabled '1'
# list network 'wan'
#
#config v3
# option username 'John'
# option allow_write '0'
# option auth_type 'SHA|MD5'
# option auth_pass 'passphrase'
# option privacy_type 'AES|DES'
# option privacy_pass 'passphrase'
# option RestrictOID 'yes|no'
# option RestrictedOID '1.3.6.1.2.1.1.1'

68
net/net-snmp/files/snmpd.init
View File

@@ -242,6 +242,71 @@ snmpd_sink_add() {
echo "$section $host$port $community" >> $CONFIGFILE
}
snmpd_snmpv3_add() {
local cfg="$1"
local cfg2="$2"
local version
local username
local auth_type
local auth_pass
local privacy_type
local privacy_pass
local allow_write
local oid
config_get version "$cfg2" snmp_version
if [ "$version" != "v1/v2c/v3" ] && [ "$version" != "v3" ]; then
echo "skipping section '$cfg' wrong 'snmp_version=$version' configured"
return 0
fi
config_get username "$cfg" username
[ -n "$username" ] || {
echo "skipping section '$cfg' 'username' missing"
return 0
}
config_get auth_pass "$cfg" auth_pass
config_get oid "$cfg" RestrictedOID
config_get_bool allow_write "$cfg" allow_write 0
local useraccess="rouser"
[ "$allow_write" -eq 1 ] && useraccess="rwuser"
if [ -z "$auth_pass" ]; then
echo "createUser $username" >> "$CONFIGFILE"
echo "$useraccess $username noauth $oid" >> "$CONFIGFILE"
return
fi
[ "${#auth_pass}" -lt 8 ] && {
echo "skipping section '$cfg' 'auth_pass' requires a min length of 8"
return 0
}
config_get auth_type "$cfg" auth_type
[ -z "$auth_type" ] && {
echo "skipping section '$cfg' 'auth_type' missing"
return 0
}
config_get privacy_type "$cfg" privacy_type
config_get privacy_pass "$cfg" privacy_pass
if [ -n "$privacy_type" ] && [ -n "$privacy_pass" ]; then
[ "${#privacy_pass}" -lt 8 ] && {
echo "skipping section '$cfg' 'privacy_pass' requires a min length of 8"
return 0
}
echo "createUser $username $auth_type \"$auth_pass\" $privacy_type \"$privacy_pass\"" >> "$CONFIGFILE"
echo "$useraccess $username priv $oid" >> "$CONFIGFILE"
else
echo "createUser $username $auth_type \"$auth_pass\"" >> "$CONFIGFILE"
echo "$useraccess $username auth $oid" >> "$CONFIGFILE"
fi
}
append_parm() {
local section="$1"
local option="$2"
@@ -319,9 +384,10 @@ start_service() {
append_authtrapenable authtrapenable enable authtrapenable
append_parm v1trapaddress host v1trapaddress
append_parm trapsess trapsess trapsess
config_foreach snmpd_snmpv3_add v3 general
procd_set_param command $PROG -Lf /dev/null -f -r
procd_set_param file $CONFIGFILE
procd_append_param command -C -c "$CONFIGFILE"
procd_set_param respawn
for iface in $(ls /sys/class/net 2>/dev/null); do