Initial Release
This commit is contained in:
parent
e44ed140e3
commit
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15 changed files with 679 additions and 0 deletions
9
.gitignore
vendored
Normal file
9
.gitignore
vendored
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@ -0,0 +1,9 @@
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src/update.d/*
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!src/update.d/.do-not-delete
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src/aws/*
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!src/aws/.do-not-delete
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src/conf.d/*
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!src/conf.d/.do-not-delete
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4
init/dynamic-ip-update.target
Normal file
4
init/dynamic-ip-update.target
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@ -0,0 +1,4 @@
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[Unit]
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Description=Dynamic IP Target
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StopWhenUnneeded=yes
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3
init/dynamic-ip.sysconfig
Normal file
3
init/dynamic-ip.sysconfig
Normal file
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@ -0,0 +1,3 @@
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# Domain Name to update:
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#DOMAIN_NAME=
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11
init/dynamic-ip.timer
Normal file
11
init/dynamic-ip.timer
Normal file
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@ -0,0 +1,11 @@
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[Unit]
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Description=Update Dynamic IPs with DNS servers
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[Timer]
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OnBootSec=5min
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OnCalendar=*:0/5
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Unit=dynamic-ip-update.target
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[Install]
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WantedBy=timers.target
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11
init/update-ipv4.service
Normal file
11
init/update-ipv4.service
Normal file
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@ -0,0 +1,11 @@
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[Unit]
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Description=Updates IPv4 with external DNS
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Wants=dynamic-ip.timer
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[Service]
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EnvironmentFile=/etc/sysconfig/dynamic-ip-update
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ExecStart=/etc/dynamic-ip/update-ipv4 ${DOMAIN_NAME}
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[Install]
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WantedBy=dynamic-ip-update.target
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11
init/update-ipv6.service
Normal file
11
init/update-ipv6.service
Normal file
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@ -0,0 +1,11 @@
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[Unit]
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Description=Updates IPv6 with external DNS
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Wants=dynamic-ip.timer
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[Service]
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EnvironmentFile=/etc/sysconfig/dynamic-ip-update
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ExecStart=/etc/dynamic-ip/update-ipv6 ${DOMAIN_NAME}
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[Install]
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WantedBy=dynamic-ip-update.target
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66
src/agents.d/aws-sg
Executable file
66
src/agents.d/aws-sg
Executable file
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@ -0,0 +1,66 @@
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#!/bin/bash
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# Internal Initialization
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source "${DIP_FUNCTIONS}"
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if [[ -r "${DIP_BASE_DIR}/conf.d/${DIP_AGENT_NAME}.conf" ]]; then
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source "${DIP_BASE_DIR}/conf.d/${DIP_AGENT_NAME}.conf"
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fi
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if [[ -r "${DIP_BASE_DIR}/conf.d/${DIP_AGENT_EXEC}.conf" ]]; then
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source "${DIP_BASE_DIR}/conf.d/${DIP_AGENT_EXEC}.conf"
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fi
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if [[ -z "$agent_aws_sg_id" ]]; then
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logerr "ERROR: Need 'agent_aws_sg_id' to be defined to your Security Group ID"
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exit 99
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fi
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if [[ -d "${DIP_BASE_DIR}/aws" ]]; then
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if [[ ! -r "${DIP_BASE_DIR}/aws/config" ]]; then
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logerr "ERROR: AWS config file not found: '${DIP_BASE_DIR}/aws/config'"
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exit 99
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elif [[ ! -r "${DIP_BASE_DIR}/aws/credentials" ]]; then
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logerr "ERROR: AWS credentials file not found: '${DIP_BASE_DIR}/aws/credentials'"
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exit 99
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else
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export AWS_CONFIG_FILE="${DIP_BASE_DIR}/aws/config"
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export AWS_SHARED_CREDENTIALS_FILE="${DIP_BASE_DIR}/aws/credentials"
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fi
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else
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logerr "ERROR: AWS config directory not found. '${DIP_BASE_DIR}/aws/' is expected to exist and contain 'config' and 'credentials' for AWS access."
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exit 99
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fi
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if [[ -z "$DIP_CUR_IP" ]] || [[ -z "$DIP_OLD_IP" ]]; then
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logerr "ERROR: Agent expects currentip, and existingip."
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exit 98
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fi
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# Main
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if valid_ipv4 "$DIP_CUR_IP"; then
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if [[ "${DIP_CUR_IP}/32" = "${DIP_OLD_IP}/32" ]]; then
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log "No changes required."
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else
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log "Updating Security Group IP"
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aws ec2 revoke-security-group-ingress --group-id "${agent_aws_sg_id}" --ip-permissions "[{\"IpProtocol\": \"-1\", \"IpRanges\": [{\"CidrIp\": \"${DIP_OLD_IP}/32\"}]}]"
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aws ec2 authorize-security-group-ingress --group-id "${agent_aws_sg_id}" --ip-permissions "[{\"IpProtocol\": \"-1\", \"IpRanges\": [{\"CidrIp\": \"${DIP_CUR_IP}/32\"}]}]"
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fi
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fi
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if valid_ipv6 "$DIP_CUR_IP"; then
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currentprefix=$(getIPv6Prefix $DIP_CUR_IP)
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existingprefix=$(getIPv6Prefix $DIP_OLD_IP)
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if [[ "$currentprefix" = "$existingprefix" ]]; then
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log "No changes required."
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else
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log "Updating Security Group IPv6"
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aws ec2 revoke-security-group-ingress --group-id "${agent_aws-sg_id}" --ip-permissions "[{\"IpProtocol\": \"-1\", \"Ipv6Ranges\": [{\"CidrIpv6\": \"${existingprefix}\"}]}]"
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aws ec2 authorize-security-group-ingress --group-id "${agent_aws-sg_id}" --ip-permissions "[{\"IpProtocol\": \"-1\", \"Ipv6Ranges\": [{\"CidrIpv6\": \"${currentprefix}\"}]}]"
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fi
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fi
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52
src/agents.d/update-dns-r53
Executable file
52
src/agents.d/update-dns-r53
Executable file
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#!/bin/bash
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# Internal Initialization
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source "${DIP_FUNCTIONS}"
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if [[ -r "${DIP_BASE_DIR}/conf.d/${DIP_AGENT_NAME}.conf" ]]; then
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source "${DIP_BASE_DIR}/conf.d/${DIP_AGENT_NAME}.conf"
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fi
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if [[ -r "${DIP_BASE_DIR}/conf.d/${DIP_AGENT_EXEC}.conf" ]]; then
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source "${DIP_BASE_DIR}/conf.d/${DIP_AGENT_EXEC}.conf"
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fi
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if [[ -z "$agent_update_dns_r53_id" ]]; then
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logerr "ERROR: Need 'agent_update_dns_r53_id' to be defined to your Route53 Domain ID"
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exit 99
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fi
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if [[ -d "${DIP_BASE_DIR}/aws" ]]; then
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if [[ ! -r "${DIP_BASE_DIR}/aws/config" ]]; then
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logerr "ERROR: AWS config file not found: '${DIP_BASE_DIR}/aws/config'"
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exit 99
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elif [[ ! -r "${DIP_BASE_DIR}/aws/credentials" ]]; then
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logerr "ERROR: AWS credentials file not found: '${DIP_BASE_DIR}/aws/credentials'"
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exit 99
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else
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export AWS_CONFIG_FILE="${DIP_BASE_DIR}/aws/config"
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export AWS_SHARED_CREDENTIALS_FILE="${DIP_BASE_DIR}/aws/credentials"
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fi
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else
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logerr "ERROR: AWS config directory not found. '${DIP_BASE_DIR}/aws/' is expected to exist and contain 'config' and 'credentials' for AWS access."
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exit 99
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fi
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if [[ -z "$DIP_CUR_IP" ]] || [[ -z "$DIP_OLD_IP" ]] || [[ -z "$DIP_RECORD" ]]; then
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logerr "ERROR: Agent expects currentip, existingip, and record."
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exit 98
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fi
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# Main
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if valid_ipv4 "$DIP_CUR_IP"; then
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log "Updating Route53 DNS IPv4 Record"
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/usr/local/bin/cli53 rc --replace "$agent_update_dns_r53_id" "${DIP_RECORD}. 300 A ${DIP_CUR_IP}"
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fi
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if valid_ipv6 "$DIP_CUR_IP"; then
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log "Updating Route53 DNS IPv6 Record"
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/usr/local/bin/cli53 rc --replace "$agent_update_dns_r53_id" "${DIP_RECORD}. 300 AAAA ${DIP_CUR_IP}"
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fi
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0
src/aws/.do-not-delete
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0
src/aws/.do-not-delete
Normal file
8
src/checks.lst
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8
src/checks.lst
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# Example using a router's automatic wan-ip name as Ubiquity routers do:
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#dig +short @172.17.0.1 wan-ip.mydomain
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# Use OpenDNS to get MyIP
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dig +short myip.opendns.com @resolver1.opendns.com
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# Use ipecho.com to get MyIP
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curl --silent ipecho.net/plain
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0
src/conf.d/.do-not-delete
Normal file
0
src/conf.d/.do-not-delete
Normal file
502
src/dynamic-ip
Executable file
502
src/dynamic-ip
Executable file
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#!/bin/bash
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# Functions
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trim() {
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local extglobWasOff=1
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local var=$1
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shopt extglob >/dev/null && extglobWasOff=0
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(( extglobWasOff )) && shopt -s extglob
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var=${var##+([[:space:]])}
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var=${var%%+([[:space:]])}
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(( extglobWasOff )) && shopt -u extglob
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echo -n "$var"
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}
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valid_ip() {
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local ip=$1
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if [[ "${prog_name,,}" == "update-ipv4" ]]; then
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valid_ipv4 "$ip"
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return $?
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elif [[ "${prog_name,,}" == "update-ipv6" ]]; then
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valid_ipv6 "$ip"
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return $?
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fi
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return 89
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}
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valid_ipv4() {
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local ip=$1
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local stat=1
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if [[ $ip =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
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OIFS=$IFS
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IFS='.'
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ip=($ip)
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IFS=$OIFS
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[[ ${ip[0]} -le 255 && ${ip[1]} -le 255 \
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&& ${ip[2]} -le 255 && ${ip[3]} -le 255 ]]
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stat=$?
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fi
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return $stat
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}
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valid_ipv6() {
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local ip=$1
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if [[ $ip =~ ^$|^[0-9a-fA-F]{1,4}:[0-9a-fA-F]{1,4}:[0-9a-fA-F]{1,4}:[0-9a-fA-F]{1,4}:[0-9a-fA-F]{1,4}:[0-9a-fA-F]{1,4}:[0-9a-fA-F]{1,4}:[0-9a-fA-F]{1,4}$ ]]; then
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return 0
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else
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return 1
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fi
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}
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getRecords() {
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local file=$1
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local r
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if [[ ! -r "$file" ]]; then
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return 1
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else
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while read r;
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do
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r=$(trim "$r")
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[[ ${r:0:1} == '#' ]] && continue
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[[ -z "$r" ]] && continue
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echo "$r"
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done <"$file"
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fi
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}
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getIPv4() {
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local result
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local err
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local -a checks
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if [[ ! -f "${script_dir}/checks.lst" ]]
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then
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return 1
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else
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mapfile -t checks < "${script_dir}/checks.lst"
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fi
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for i in "${checks[@]}"
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do
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i=$(trim "$i")
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[[ ${i:0:1} == '#' ]] && continue
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[[ -z "$i" ]] && continue
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result=$($i)
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err=$?
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if [[ $err -ne 0 ]]
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then
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continue
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fi
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if valid_ipv4 "$result"
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then
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echo "$result"
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return 0
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fi
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done
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return 1
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}
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getIPv6() {
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local result
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local err
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result=$(/sbin/ip -6 addr | grep inet6 | awk -F '[ \t]+|/' '{print $3}' | grep -v ^::1 | grep -v ^fe80)
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err=$?
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if [[ $err -ne 0 ]]; then
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return 1
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elif valid_ipv6 "$result"; then
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echo "$result"
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return 0
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else
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return 0
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fi
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}
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getDnsNS() {
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local rec=$1
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local domain=$(sed 's/[^.]*\.\([^.]*\..*\)/\1/' <<<"$rec")
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local result
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local err
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result=$(dig +short @8.8.8.8 NS $domain | sed -e 's/.$//')
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err=$?
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if [[ $err -eq 0 ]]
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then
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for d in $result
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do
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echo "$d"
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done
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else
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logerr "ERROR"
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return $err
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fi
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}
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getDnsIP() {
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local rec=$1
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local rectype
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local result
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local err
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for i in $(getDnsNS "$rec")
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do
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[[ "$i" = "ERROR" ]] && return 1
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if [[ "${prog_name,,}" == "update-ipv4" ]]; then
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rectype=A
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elif [[ "${prog_name,,}" == "update-ipv6" ]]; then
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rectype=AAAA
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else
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return 88
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fi
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|
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result=$(dig +short @${i} ${rectype} ${rec} | head -n1)
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err=$?
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if [[ $err -ne 0 ]] || [[ -z "$result" ]]; then
|
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logerr "ERROR: DNS lookup for $i"
|
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continue
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elif valid_ip "$result"; then
|
||||
echo "$result"
|
||||
return 0
|
||||
else
|
||||
logerr "ERROR: Lookup failed with: $result"
|
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continue
|
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fi
|
||||
done
|
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return 1
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}
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||||
|
||||
getIPv6Prefix() {
|
||||
local rec=$1
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local result
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local err
|
||||
|
||||
if valid_ipv6 $rec
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then
|
||||
result=$(echo "$rec" | cut -d':' -f1-4)
|
||||
result="${result}::/64"
|
||||
echo "$result"
|
||||
else
|
||||
logerr "Not IPv6"
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||||
return 1
|
||||
fi
|
||||
}
|
||||
|
||||
getZabbixProxyIP() {
|
||||
local result
|
||||
local err
|
||||
|
||||
result=$(awk -F "=" '/^Server/ { print $2 }' /etc/zabbix/zabbix_proxy.conf)
|
||||
err=$?
|
||||
|
||||
if [[ $err -ne 0 ]]
|
||||
then
|
||||
return 1
|
||||
elif valid_ip "$result"
|
||||
then
|
||||
echo "$result"
|
||||
return 0
|
||||
else
|
||||
return 1
|
||||
fi
|
||||
}
|
||||
|
||||
getShorewallIP() {
|
||||
local result
|
||||
local err
|
||||
|
||||
result=$(awk -F "=" '/HOME_IP/ { print $2 }' /etc/shorewall/params)
|
||||
err=$?
|
||||
|
||||
if [[ $err -ne 0 ]]
|
||||
then
|
||||
return 1
|
||||
elif valid_ip "$result"
|
||||
then
|
||||
echo "$result"
|
||||
return 0
|
||||
else
|
||||
return 1
|
||||
fi
|
||||
}
|
||||
|
||||
getCachedIP() {
|
||||
local result
|
||||
local err
|
||||
|
||||
result=$(<"$HOME/.cached_ip")
|
||||
err=$?
|
||||
|
||||
if [[ $err -ne 0 ]]; then
|
||||
return 1
|
||||
elif valid_ip "$result"; then
|
||||
echo "$result"
|
||||
return 0
|
||||
else
|
||||
return 0
|
||||
fi
|
||||
}
|
||||
|
||||
log() {
|
||||
echo "$*"
|
||||
}
|
||||
|
||||
logerr() {
|
||||
>&2 log $*
|
||||
}
|
||||
|
||||
run-parts() {
|
||||
# Ignore *~ and *, scripts
|
||||
for i in $(LC_ALL=C; echo ${1%/}/*[^~,]) ; do
|
||||
[[ -d $i ]] && continue
|
||||
# Don't run *.{rpmsave,rpmorig,rpmnew,swp,cfsaved} scripts
|
||||
[[ "${i%.cfsaved}" != "${i}" ]] && continue
|
||||
[[ "${i%.rpmsave}" != "${i}" ]] && continue
|
||||
[[ "${i%.rpmorig}" != "${i}" ]] && continue
|
||||
[[ "${i%.rpmnew}" != "${i}" ]] && continue
|
||||
[[ "${i%.swp}" != "${i}" ]] && continue
|
||||
[[ "${i%,v}" != "${i}" ]] && continue
|
||||
|
||||
# jobs.deny prevents specific files from being executed
|
||||
# jobs.allow prohibits all non-named jobs from being run.
|
||||
# can be used in conjunction but there's no reason to do so.
|
||||
if [[ -r "${1}/jobs.deny" ]]; then
|
||||
grep -q "^$(basename "$i")$" "${1}/jobs.deny" && continue
|
||||
fi
|
||||
if [[ -r "${1}/jobs.allow" ]]; then
|
||||
grep -q "^$(basename "$i")$" "${1}/jobs.allow" || continue
|
||||
fi
|
||||
|
||||
if [[ -e $i ]]; then
|
||||
if [[ -r "${1}/whitelist" ]]; then
|
||||
grep -q "^$(basename "$i")$" "${1}/whitelist" && continue
|
||||
fi
|
||||
|
||||
if [[ -x "$i" ]]; then
|
||||
# run executable files
|
||||
echo "$i"
|
||||
fi
|
||||
fi
|
||||
done
|
||||
}
|
||||
|
||||
run-hook() {
|
||||
local hook_dir=$1
|
||||
local errors=0
|
||||
shift
|
||||
|
||||
if [[ ! -d "${hook_dir}" ]]; then
|
||||
return 0
|
||||
fi
|
||||
|
||||
while read s
|
||||
do
|
||||
log "Running agent: $(basename "$s")"
|
||||
DIP_FUNCTIONS="$(readlink -f "$0")" \
|
||||
DIP_AGENT_NAME="$(basename "$(readlink -f "$s")")" \
|
||||
DIP_AGENT_EXEC="$(basename "$s")" \
|
||||
DIP_AGENT_DIR="$(dirname "$(readlink -f "$s")")" \
|
||||
DIP_BASE_DIR="${script_dir}" \
|
||||
DIP_CUR_IP="$1" \
|
||||
DIP_OLD_IP="$2" \
|
||||
DIP_RECORD="$3" \
|
||||
"$s" $*
|
||||
err=$?
|
||||
|
||||
if [[ $err -ne 0 ]]; then
|
||||
let errors++
|
||||
fi
|
||||
done < <(run-parts "${hook_dir}")
|
||||
|
||||
return $errors
|
||||
}
|
||||
|
||||
run-update() {
|
||||
local cip=$1
|
||||
local eip=$2
|
||||
local rec=$3
|
||||
|
||||
if [[ "$cip" != "$eip" ]]
|
||||
then
|
||||
run-hook "${script_dir}/update.d" "$cip" "$eip" "$rec"
|
||||
err=$?
|
||||
|
||||
if [[ $err -gt 0 ]]; then
|
||||
return $err
|
||||
fi
|
||||
else
|
||||
log "No change detected"
|
||||
fi
|
||||
}
|
||||
|
||||
# Caches current local IP so it doesn't have to every time.
|
||||
getCurrentLocalIP() {
|
||||
local cip
|
||||
|
||||
if [[ -z "$currentip" ]]; then
|
||||
case "${prog_name,,}" in
|
||||
update-ipv4) cip=$(getIPv4) || return 1;;
|
||||
update-ipv6) cip=$(getIPv6) || return 1;;
|
||||
*) return 3;;
|
||||
esac
|
||||
|
||||
echo "$cip"
|
||||
else
|
||||
case "${prog_name,,}" in
|
||||
update-ipv4) valid_ipv4 "$currentip" || return 1;;
|
||||
update-ipv6) valid_ipv6 "$currentip" || return 1;;
|
||||
*) return 3;;
|
||||
esac
|
||||
|
||||
echo "$currentip"
|
||||
fi
|
||||
}
|
||||
|
||||
getCurrentIP() {
|
||||
local i=$1
|
||||
|
||||
if [[ -z "$i" ]]; then
|
||||
return 1
|
||||
else
|
||||
case "${prog_name,,}" in
|
||||
update-ipv4)
|
||||
log "Checking if internet IP has changed for $i"
|
||||
currentip=$(getCurrentLocalIP) || return $?
|
||||
externalip=$(getDnsIP $i) || return 2
|
||||
return 0
|
||||
;;
|
||||
update-ipv6)
|
||||
log "Checking if internet IPv6 has changed for $i"
|
||||
currentip=$(getCurrentLocalIP) || return $?
|
||||
externalip=$(getDnsIP $i) || return 2
|
||||
return 0
|
||||
;;
|
||||
*) logerr "FATAL"; return 3 ;;
|
||||
esac
|
||||
fi
|
||||
}
|
||||
|
||||
check-update() {
|
||||
local arg=$1
|
||||
local d
|
||||
|
||||
if [[ -n "$arg" ]]; then
|
||||
getCurrentIP $arg
|
||||
err=$?
|
||||
|
||||
case $err in
|
||||
0) if [[ "$currentip" != "$externalip" ]]; then
|
||||
log "Updates found: $externalip is not $currentip"
|
||||
log "Running Agents for $arg"
|
||||
run-update "$currentip" "$externalip" "$arg"
|
||||
err=$?
|
||||
|
||||
if [[ $err -ne 0 ]]; then
|
||||
logerr "WARNING: Agents had $err errors"
|
||||
else
|
||||
log "Agents ran successfully"
|
||||
fi
|
||||
else
|
||||
log "No change detected"
|
||||
fi
|
||||
;;
|
||||
1) logerr "ERROR: Failed to determine current public IP"
|
||||
logerr "DEBUG: dig output '$currentip'"
|
||||
exit 4
|
||||
;;
|
||||
2) logerr "ERROR: Failed to determine external DNS IP"
|
||||
logerr "DEBUG: dig output '$externalip'"
|
||||
;;
|
||||
*) logerr "Unknown fatal error occurred"
|
||||
eclogerrho "(${BASH_SOURCE}:${LINENO}): ${FUNCNAME[0]:+${FUNCNAME[0]}(): }"
|
||||
exit $err
|
||||
;;
|
||||
esac
|
||||
else
|
||||
if [[ -n "$record" ]]; then
|
||||
check-update "$record"
|
||||
elif [[ -n "$record_file" ]]; then
|
||||
for d in $(getRecords "$record_file"); do
|
||||
check-update "$d"
|
||||
done
|
||||
else
|
||||
return 99
|
||||
fi
|
||||
fi
|
||||
}
|
||||
|
||||
|
||||
# This section doesn't run if this script was sourced.
|
||||
|
||||
if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
|
||||
# Internal Initialization
|
||||
|
||||
prog_name=$(basename "$0")
|
||||
script_dir=$(dirname "$(readlink -f "$0")")
|
||||
|
||||
if [[ -z "$1" ]]; then
|
||||
logerr "ERROR: Need to provide a DNS record or file to look-up"
|
||||
exit 1
|
||||
else
|
||||
if [[ -r "$1" ]]; then
|
||||
record_file=$1
|
||||
else
|
||||
record=$1
|
||||
fi
|
||||
fi
|
||||
|
||||
|
||||
## Locking
|
||||
|
||||
if [[ "$USER" = "root" ]]; then
|
||||
LOCKFILE="/var/lock/$(basename "$0")"
|
||||
else
|
||||
LOCKFILE="/tmp/${USER}/lock/$(basename "$0")"
|
||||
mkdir -p "/tmp/${USER}/lock"
|
||||
fi
|
||||
LOCKFD=99
|
||||
|
||||
# PRIVATE
|
||||
_lock() { flock -$1 $LOCKFD; }
|
||||
_no_more_locking() { _lock u; _lock xn && rm -f $LOCKFILE; }
|
||||
_prepare_locking() { eval "exec $LOCKFD>\"$LOCKFILE\""; trap _no_more_locking EXIT; }
|
||||
|
||||
# ON START
|
||||
_prepare_locking
|
||||
|
||||
# PUBLIC
|
||||
exlock_now() { _lock xn; } # obtain an exclusive lock immediately or fail
|
||||
exlock() { _lock x; } # obtain an exclusive lock
|
||||
shlock() { _lock s; } # obtain a shared lock
|
||||
unlock() { _lock u; } # drop a lock
|
||||
|
||||
### BEGIN OF SCRIPT ###
|
||||
|
||||
# Simplest example is avoiding running multiple instances of script.
|
||||
exlock_now || exit 1
|
||||
|
||||
# Remember! Lock file is removed when one of the scripts exits and it is
|
||||
# the only script holding the lock or lock is not acquired at all.
|
||||
|
||||
|
||||
# Main
|
||||
|
||||
case "${prog_name,,}" in
|
||||
update-ipv4) check-update; exit $? ;;
|
||||
update-ipv6) check-update; exit $? ;;
|
||||
*) logerr "ERROR: Unknown update method"; exit 1 ;;
|
||||
esac
|
||||
fi
|
||||
1
src/update-ipv4
Symbolic link
1
src/update-ipv4
Symbolic link
|
|
@ -0,0 +1 @@
|
|||
dynamic-ip
|
||||
1
src/update-ipv6
Symbolic link
1
src/update-ipv6
Symbolic link
|
|
@ -0,0 +1 @@
|
|||
dynamic-ip
|
||||
0
src/update.d/.do-not-delete
Normal file
0
src/update.d/.do-not-delete
Normal file
Loading…
Reference in a new issue