309 lines
9.1 KiB
Go
309 lines
9.1 KiB
Go
package aws
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import (
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"bytes"
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"fmt"
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"log"
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"strconv"
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"time"
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"github.com/aws/aws-sdk-go/aws"
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"github.com/aws/aws-sdk-go/service/ec2"
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"github.com/hashicorp/terraform/helper/hashcode"
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"github.com/hashicorp/terraform/helper/resource"
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"github.com/hashicorp/terraform/helper/schema"
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)
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func resourceAwsNetworkAclRule() *schema.Resource {
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return &schema.Resource{
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Create: resourceAwsNetworkAclRuleCreate,
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Read: resourceAwsNetworkAclRuleRead,
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Delete: resourceAwsNetworkAclRuleDelete,
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Schema: map[string]*schema.Schema{
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"network_acl_id": {
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Type: schema.TypeString,
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Required: true,
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ForceNew: true,
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},
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"rule_number": {
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Type: schema.TypeInt,
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Required: true,
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ForceNew: true,
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},
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"egress": {
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Type: schema.TypeBool,
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Optional: true,
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ForceNew: true,
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Default: false,
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},
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"protocol": {
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Type: schema.TypeString,
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Required: true,
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ForceNew: true,
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DiffSuppressFunc: func(k, old, new string, d *schema.ResourceData) bool {
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if old == "all" && new == "-1" || old == "-1" && new == "all" {
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return true
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}
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return false
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},
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},
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"rule_action": {
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Type: schema.TypeString,
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Required: true,
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ForceNew: true,
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},
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"cidr_block": {
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Type: schema.TypeString,
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Optional: true,
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ForceNew: true,
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},
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"ipv6_cidr_block": {
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Type: schema.TypeString,
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Optional: true,
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ForceNew: true,
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},
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"from_port": {
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Type: schema.TypeInt,
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Optional: true,
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ForceNew: true,
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},
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"to_port": {
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Type: schema.TypeInt,
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Optional: true,
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ForceNew: true,
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},
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"icmp_type": {
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Type: schema.TypeString,
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Optional: true,
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ForceNew: true,
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ValidateFunc: validateICMPArgumentValue,
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},
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"icmp_code": {
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Type: schema.TypeString,
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Optional: true,
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ForceNew: true,
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ValidateFunc: validateICMPArgumentValue,
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},
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},
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}
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}
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func resourceAwsNetworkAclRuleCreate(d *schema.ResourceData, meta interface{}) error {
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conn := meta.(*AWSClient).ec2conn
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protocol := d.Get("protocol").(string)
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p, protocolErr := strconv.Atoi(protocol)
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if protocolErr != nil {
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var ok bool
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p, ok = protocolIntegers()[protocol]
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if !ok {
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return fmt.Errorf("Invalid Protocol %s for rule %d", protocol, d.Get("rule_number").(int))
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}
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}
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log.Printf("[INFO] Transformed Protocol %s into %d", protocol, p)
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params := &ec2.CreateNetworkAclEntryInput{
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NetworkAclId: aws.String(d.Get("network_acl_id").(string)),
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Egress: aws.Bool(d.Get("egress").(bool)),
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RuleNumber: aws.Int64(int64(d.Get("rule_number").(int))),
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Protocol: aws.String(strconv.Itoa(p)),
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RuleAction: aws.String(d.Get("rule_action").(string)),
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PortRange: &ec2.PortRange{
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From: aws.Int64(int64(d.Get("from_port").(int))),
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To: aws.Int64(int64(d.Get("to_port").(int))),
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},
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}
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cidr, hasCidr := d.GetOk("cidr_block")
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ipv6Cidr, hasIpv6Cidr := d.GetOk("ipv6_cidr_block")
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if hasCidr == false && hasIpv6Cidr == false {
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return fmt.Errorf("Either `cidr_block` or `ipv6_cidr_block` must be defined")
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}
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if hasCidr {
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params.CidrBlock = aws.String(cidr.(string))
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}
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if hasIpv6Cidr {
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params.Ipv6CidrBlock = aws.String(ipv6Cidr.(string))
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}
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// Specify additional required fields for ICMP. For the list
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// of ICMP codes and types, see: http://www.nthelp.com/icmp.html
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if p == 1 {
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params.IcmpTypeCode = &ec2.IcmpTypeCode{}
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if v, ok := d.GetOk("icmp_type"); ok {
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icmpType, err := strconv.Atoi(v.(string))
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if err != nil {
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return fmt.Errorf("Unable to parse ICMP type %s for rule %d", v, d.Get("rule_number").(int))
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}
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params.IcmpTypeCode.Type = aws.Int64(int64(icmpType))
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log.Printf("[DEBUG] Got ICMP type %d for rule %d", icmpType, d.Get("rule_number").(int))
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}
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if v, ok := d.GetOk("icmp_code"); ok {
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icmpCode, err := strconv.Atoi(v.(string))
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if err != nil {
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return fmt.Errorf("Unable to parse ICMP code %s for rule %d", v, d.Get("rule_number").(int))
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}
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params.IcmpTypeCode.Code = aws.Int64(int64(icmpCode))
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log.Printf("[DEBUG] Got ICMP code %d for rule %d", icmpCode, d.Get("rule_number").(int))
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}
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}
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log.Printf("[INFO] Creating Network Acl Rule: %d (%t)", d.Get("rule_number").(int), d.Get("egress").(bool))
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_, err := conn.CreateNetworkAclEntry(params)
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if err != nil {
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return fmt.Errorf("Error Creating Network Acl Rule: %s", err.Error())
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}
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d.SetId(networkAclIdRuleNumberEgressHash(d.Get("network_acl_id").(string), d.Get("rule_number").(int), d.Get("egress").(bool), d.Get("protocol").(string)))
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// It appears it might be a while until the newly created rule is visible via the
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// API (see issue GH-4721). Retry the `findNetworkAclRule` function until it is
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// visible (which in most cases is likely immediately).
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err = resource.Retry(3*time.Minute, func() *resource.RetryError {
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r, findErr := findNetworkAclRule(d, meta)
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if findErr != nil {
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return resource.RetryableError(findErr)
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}
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if r == nil {
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err := fmt.Errorf("Network ACL rule (%s) not found", d.Id())
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return resource.RetryableError(err)
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}
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return nil
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})
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if err != nil {
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return fmt.Errorf("Created Network ACL Rule was not visible in API within 3 minute period. Running 'terraform apply' again will resume infrastructure creation.")
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}
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return resourceAwsNetworkAclRuleRead(d, meta)
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}
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func resourceAwsNetworkAclRuleRead(d *schema.ResourceData, meta interface{}) error {
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resp, err := findNetworkAclRule(d, meta)
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if err != nil {
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return err
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}
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if resp == nil {
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log.Printf("[DEBUG] Network ACL rule (%s) not found", d.Id())
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d.SetId("")
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return nil
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}
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d.Set("rule_number", resp.RuleNumber)
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d.Set("cidr_block", resp.CidrBlock)
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d.Set("ipv6_cidr_block", resp.Ipv6CidrBlock)
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d.Set("egress", resp.Egress)
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if resp.IcmpTypeCode != nil {
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d.Set("icmp_code", resp.IcmpTypeCode.Code)
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d.Set("icmp_type", resp.IcmpTypeCode.Type)
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}
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if resp.PortRange != nil {
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d.Set("from_port", resp.PortRange.From)
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d.Set("to_port", resp.PortRange.To)
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}
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d.Set("rule_action", resp.RuleAction)
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p, protocolErr := strconv.Atoi(*resp.Protocol)
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log.Printf("[INFO] Converting the protocol %v", p)
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if protocolErr == nil {
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var ok bool
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protocol, ok := protocolStrings(protocolIntegers())[p]
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if !ok {
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return fmt.Errorf("Invalid Protocol %s for rule %d", *resp.Protocol, d.Get("rule_number").(int))
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}
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log.Printf("[INFO] Transformed Protocol %s back into %s", *resp.Protocol, protocol)
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d.Set("protocol", protocol)
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}
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return nil
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}
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func resourceAwsNetworkAclRuleDelete(d *schema.ResourceData, meta interface{}) error {
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conn := meta.(*AWSClient).ec2conn
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params := &ec2.DeleteNetworkAclEntryInput{
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NetworkAclId: aws.String(d.Get("network_acl_id").(string)),
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RuleNumber: aws.Int64(int64(d.Get("rule_number").(int))),
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Egress: aws.Bool(d.Get("egress").(bool)),
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}
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log.Printf("[INFO] Deleting Network Acl Rule: %s", d.Id())
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_, err := conn.DeleteNetworkAclEntry(params)
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if err != nil {
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return fmt.Errorf("Error Deleting Network Acl Rule: %s", err.Error())
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}
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return nil
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}
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func findNetworkAclRule(d *schema.ResourceData, meta interface{}) (*ec2.NetworkAclEntry, error) {
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conn := meta.(*AWSClient).ec2conn
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filters := make([]*ec2.Filter, 0, 2)
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ruleNumberFilter := &ec2.Filter{
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Name: aws.String("entry.rule-number"),
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Values: []*string{aws.String(fmt.Sprintf("%d", d.Get("rule_number").(int)))},
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}
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filters = append(filters, ruleNumberFilter)
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egressFilter := &ec2.Filter{
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Name: aws.String("entry.egress"),
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Values: []*string{aws.String(fmt.Sprintf("%v", d.Get("egress").(bool)))},
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}
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filters = append(filters, egressFilter)
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params := &ec2.DescribeNetworkAclsInput{
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NetworkAclIds: []*string{aws.String(d.Get("network_acl_id").(string))},
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Filters: filters,
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}
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log.Printf("[INFO] Describing Network Acl: %s", d.Get("network_acl_id").(string))
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log.Printf("[INFO] Describing Network Acl with the Filters %#v", params)
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resp, err := conn.DescribeNetworkAcls(params)
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if err != nil {
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return nil, fmt.Errorf("Error Finding Network Acl Rule %d: %s", d.Get("rule_number").(int), err.Error())
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}
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if resp == nil || len(resp.NetworkAcls) == 0 || resp.NetworkAcls[0] == nil {
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// Missing NACL rule.
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return nil, nil
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}
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if len(resp.NetworkAcls) > 1 {
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return nil, fmt.Errorf(
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"Expected to find one Network ACL, got: %#v",
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resp.NetworkAcls)
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}
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networkAcl := resp.NetworkAcls[0]
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if networkAcl.Entries != nil {
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for _, i := range networkAcl.Entries {
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if *i.RuleNumber == int64(d.Get("rule_number").(int)) && *i.Egress == d.Get("egress").(bool) {
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return i, nil
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}
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}
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}
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return nil, fmt.Errorf(
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"Expected the Network ACL to have Entries, got: %#v",
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networkAcl)
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}
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func networkAclIdRuleNumberEgressHash(networkAclId string, ruleNumber int, egress bool, protocol string) string {
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var buf bytes.Buffer
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buf.WriteString(fmt.Sprintf("%s-", networkAclId))
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buf.WriteString(fmt.Sprintf("%d-", ruleNumber))
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buf.WriteString(fmt.Sprintf("%t-", egress))
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buf.WriteString(fmt.Sprintf("%s-", protocol))
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return fmt.Sprintf("nacl-%d", hashcode.String(buf.String()))
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}
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func validateICMPArgumentValue(v interface{}, k string) (ws []string, errors []error) {
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value := v.(string)
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_, err := strconv.Atoi(value)
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if len(value) == 0 || err != nil {
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errors = append(errors, fmt.Errorf("%q must be an integer value: %q", k, value))
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}
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return
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}
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