package cloudstack import ( "bytes" "fmt" "regexp" "sort" "strconv" "strings" "github.com/hashicorp/terraform/helper/hashcode" "github.com/hashicorp/terraform/helper/schema" "github.com/xanzy/go-cloudstack/cloudstack" ) func resourceCloudStackEgressFirewall() *schema.Resource { return &schema.Resource{ Create: resourceCloudStackEgressFirewallCreate, Read: resourceCloudStackEgressFirewallRead, Update: resourceCloudStackEgressFirewallUpdate, Delete: resourceCloudStackEgressFirewallDelete, Schema: map[string]*schema.Schema{ "network": &schema.Schema{ Type: schema.TypeString, Required: true, ForceNew: true, }, "managed": &schema.Schema{ Type: schema.TypeBool, Optional: true, Default: false, }, "rule": &schema.Schema{ Type: schema.TypeSet, Optional: true, Elem: &schema.Resource{ Schema: map[string]*schema.Schema{ "source_cidr": &schema.Schema{ Type: schema.TypeString, Required: true, }, "protocol": &schema.Schema{ Type: schema.TypeString, Required: true, }, "icmp_type": &schema.Schema{ Type: schema.TypeInt, Optional: true, Computed: true, }, "icmp_code": &schema.Schema{ Type: schema.TypeInt, Optional: true, Computed: true, }, "ports": &schema.Schema{ Type: schema.TypeSet, Optional: true, Elem: &schema.Schema{Type: schema.TypeString}, Set: func(v interface{}) int { return hashcode.String(v.(string)) }, }, "uuids": &schema.Schema{ Type: schema.TypeMap, Computed: true, }, }, }, Set: resourceCloudStackEgressFirewallRuleHash, }, }, } } func resourceCloudStackEgressFirewallCreate(d *schema.ResourceData, meta interface{}) error { cs := meta.(*cloudstack.CloudStackClient) // Make sure all required parameters are there if err := verifyEgressFirewallParams(d); err != nil { return err } // Retrieve the network ID networkid, e := retrieveID(cs, "network", d.Get("network").(string)) if e != nil { return e.Error() } // We need to set this upfront in order to be able to save a partial state d.SetId(networkid) // Create all rules that are configured if rs := d.Get("rule").(*schema.Set); rs.Len() > 0 { // Create an empty schema.Set to hold all rules rules := &schema.Set{ F: resourceCloudStackEgressFirewallRuleHash, } for _, rule := range rs.List() { // Create a single rule err := resourceCloudStackEgressFirewallCreateRule(d, meta, rule.(map[string]interface{})) // We need to update this first to preserve the correct state rules.Add(rule) d.Set("rule", rules) if err != nil { return err } } } return resourceCloudStackEgressFirewallRead(d, meta) } func resourceCloudStackEgressFirewallCreateRule( d *schema.ResourceData, meta interface{}, rule map[string]interface{}) error { cs := meta.(*cloudstack.CloudStackClient) uuids := rule["uuids"].(map[string]interface{}) // Make sure all required rule parameters are there if err := verifyEgressFirewallRuleParams(d, rule); err != nil { return err } // Create a new parameter struct p := cs.Firewall.NewCreateEgressFirewallRuleParams(d.Id(), rule["protocol"].(string)) // Set the CIDR list p.SetCidrlist([]string{rule["source_cidr"].(string)}) // If the protocol is ICMP set the needed ICMP parameters if rule["protocol"].(string) == "icmp" { p.SetIcmptype(rule["icmp_type"].(int)) p.SetIcmpcode(rule["icmp_code"].(int)) r, err := cs.Firewall.CreateEgressFirewallRule(p) if err != nil { return err } uuids["icmp"] = r.Id rule["uuids"] = uuids } // If protocol is not ICMP, loop through all ports if rule["protocol"].(string) != "icmp" { if ps := rule["ports"].(*schema.Set); ps.Len() > 0 { // Create an empty schema.Set to hold all processed ports ports := &schema.Set{ F: func(v interface{}) int { return hashcode.String(v.(string)) }, } for _, port := range ps.List() { re := regexp.MustCompile(`^(\d+)(?:-(\d+))?$`) m := re.FindStringSubmatch(port.(string)) startPort, err := strconv.Atoi(m[1]) if err != nil { return err } endPort := startPort if m[2] != "" { endPort, err = strconv.Atoi(m[2]) if err != nil { return err } } p.SetStartport(startPort) p.SetEndport(endPort) r, err := cs.Firewall.CreateEgressFirewallRule(p) if err != nil { return err } ports.Add(port) rule["ports"] = ports uuids[port.(string)] = r.Id rule["uuids"] = uuids } } } return nil } func resourceCloudStackEgressFirewallRead(d *schema.ResourceData, meta interface{}) error { cs := meta.(*cloudstack.CloudStackClient) // Get all the rules from the running environment p := cs.Firewall.NewListEgressFirewallRulesParams() p.SetNetworkid(d.Id()) p.SetListall(true) l, err := cs.Firewall.ListEgressFirewallRules(p) if err != nil { return err } // Make a map of all the rules so we can easily find a rule ruleMap := make(map[string]*cloudstack.EgressFirewallRule, l.Count) for _, r := range l.EgressFirewallRules { ruleMap[r.Id] = r } // Create an empty schema.Set to hold all rules rules := &schema.Set{ F: resourceCloudStackEgressFirewallRuleHash, } // Read all rules that are configured if rs := d.Get("rule").(*schema.Set); rs.Len() > 0 { for _, rule := range rs.List() { rule := rule.(map[string]interface{}) uuids := rule["uuids"].(map[string]interface{}) if rule["protocol"].(string) == "icmp" { id, ok := uuids["icmp"] if !ok { continue } // Get the rule r, ok := ruleMap[id.(string)] if !ok { delete(uuids, "icmp") continue } // Delete the known rule so only unknown rules remain in the ruleMap delete(ruleMap, id.(string)) // Update the values rule["source_cidr"] = r.Cidrlist rule["protocol"] = r.Protocol rule["icmp_type"] = r.Icmptype rule["icmp_code"] = r.Icmpcode rules.Add(rule) } // If protocol is not ICMP, loop through all ports if rule["protocol"].(string) != "icmp" { if ps := rule["ports"].(*schema.Set); ps.Len() > 0 { // Create an empty schema.Set to hold all ports ports := &schema.Set{ F: func(v interface{}) int { return hashcode.String(v.(string)) }, } // Loop through all ports and retrieve their info for _, port := range ps.List() { id, ok := uuids[port.(string)] if !ok { continue } // Get the rule r, ok := ruleMap[id.(string)] if !ok { delete(uuids, port.(string)) continue } // Delete the known rule so only unknown rules remain in the ruleMap delete(ruleMap, id.(string)) // Update the values rule["source_cidr"] = r.Cidrlist rule["protocol"] = r.Protocol ports.Add(port) } // If there is at least one port found, add this rule to the rules set if ports.Len() > 0 { rule["ports"] = ports rules.Add(rule) } } } } } // If this is a managed firewall, add all unknown rules into a single dummy rule managed := d.Get("managed").(bool) if managed && len(ruleMap) > 0 { // Add all UUIDs to a uuids map uuids := make(map[string]interface{}, len(ruleMap)) for uuid := range ruleMap { uuids[uuid] = uuid } // Make a dummy rule to hold all unknown UUIDs rule := map[string]interface{}{ "source_cidr": "N/A", "protocol": "N/A", "uuids": ruleMap, } // Add the dummy rule to the rules set rules.Add(rule) } if rules.Len() > 0 { d.Set("rule", rules) } else if !managed { d.SetId("") } return nil } func resourceCloudStackEgressFirewallUpdate(d *schema.ResourceData, meta interface{}) error { // Make sure all required parameters are there if err := verifyEgressFirewallParams(d); err != nil { return err } // Check if the rule set as a whole has changed if d.HasChange("rule") { o, n := d.GetChange("rule") ors := o.(*schema.Set).Difference(n.(*schema.Set)) nrs := n.(*schema.Set).Difference(o.(*schema.Set)) // Now first loop through all the old rules and delete any obsolete ones for _, rule := range ors.List() { // Delete the rule as it no longer exists in the config err := resourceCloudStackEgressFirewallDeleteRule(d, meta, rule.(map[string]interface{})) if err != nil { return err } } // Make sure we save the state of the currently configured rules rules := o.(*schema.Set).Intersection(n.(*schema.Set)) d.Set("rule", rules) // Then loop through all the currently configured rules and create the new ones for _, rule := range nrs.List() { // When successfully deleted, re-create it again if it still exists err := resourceCloudStackEgressFirewallCreateRule( d, meta, rule.(map[string]interface{})) // We need to update this first to preserve the correct state rules.Add(rule) d.Set("rule", rules) if err != nil { return err } } } return resourceCloudStackEgressFirewallRead(d, meta) } func resourceCloudStackEgressFirewallDelete(d *schema.ResourceData, meta interface{}) error { // Delete all rules if rs := d.Get("rule").(*schema.Set); rs.Len() > 0 { for _, rule := range rs.List() { // Delete a single rule err := resourceCloudStackEgressFirewallDeleteRule(d, meta, rule.(map[string]interface{})) // We need to update this first to preserve the correct state d.Set("rule", rs) if err != nil { return err } } } return nil } func resourceCloudStackEgressFirewallDeleteRule( d *schema.ResourceData, meta interface{}, rule map[string]interface{}) error { cs := meta.(*cloudstack.CloudStackClient) uuids := rule["uuids"].(map[string]interface{}) for k, id := range uuids { // We don't care about the count here, so just continue if k == "#" { continue } // Create the parameter struct p := cs.Firewall.NewDeleteEgressFirewallRuleParams(id.(string)) // Delete the rule if _, err := cs.Firewall.DeleteEgressFirewallRule(p); err != nil { // This is a very poor way to be told the ID does no longer exist :( if strings.Contains(err.Error(), fmt.Sprintf( "Invalid parameter id value=%s due to incorrect long value format, "+ "or entity does not exist", id.(string))) { delete(uuids, k) continue } return err } // Delete the UUID of this rule delete(uuids, k) } // Update the UUIDs rule["uuids"] = uuids return nil } func resourceCloudStackEgressFirewallRuleHash(v interface{}) int { var buf bytes.Buffer m := v.(map[string]interface{}) buf.WriteString(fmt.Sprintf( "%s-%s-", m["source_cidr"].(string), m["protocol"].(string))) if v, ok := m["icmp_type"]; ok { buf.WriteString(fmt.Sprintf("%d-", v.(int))) } if v, ok := m["icmp_code"]; ok { buf.WriteString(fmt.Sprintf("%d-", v.(int))) } // We need to make sure to sort the strings below so that we always // generate the same hash code no matter what is in the set. if v, ok := m["ports"]; ok { vs := v.(*schema.Set).List() s := make([]string, len(vs)) for i, raw := range vs { s[i] = raw.(string) } sort.Strings(s) for _, v := range s { buf.WriteString(fmt.Sprintf("%s-", v)) } } return hashcode.String(buf.String()) } func verifyEgressFirewallParams(d *schema.ResourceData) error { managed := d.Get("managed").(bool) _, rules := d.GetOk("rule") if !rules && !managed { return fmt.Errorf( "You must supply at least one 'rule' when not using the 'managed' firewall feature") } return nil } func verifyEgressFirewallRuleParams(d *schema.ResourceData, rule map[string]interface{}) error { protocol := rule["protocol"].(string) if protocol != "tcp" && protocol != "udp" && protocol != "icmp" { return fmt.Errorf( "%s is not a valid protocol. Valid options are 'tcp', 'udp' and 'icmp'", protocol) } if protocol == "icmp" { if _, ok := rule["icmp_type"]; !ok { return fmt.Errorf( "Parameter icmp_type is a required parameter when using protocol 'icmp'") } if _, ok := rule["icmp_code"]; !ok { return fmt.Errorf( "Parameter icmp_code is a required parameter when using protocol 'icmp'") } } else { if _, ok := rule["ports"]; !ok { return fmt.Errorf( "Parameter port is a required parameter when using protocol 'tcp' or 'udp'") } } return nil }