Maint: deduplicate ProtonVPN servers by entry IP

internal/models/getservers.go

@@ -168,7 +168,7 @@ func (a *AllServers) GetProtonvpn() (servers []ProtonvpnServer) {
 	for i, serverToCopy := range a.Protonvpn.Servers {
 		servers[i] = serverToCopy
 		servers[i].EntryIP = copyIP(serverToCopy.EntryIP)
-		servers[i].ExitIP = copyIP(serverToCopy.ExitIP)
+		servers[i].ExitIPs = copyIPs(serverToCopy.ExitIPs)
 	}
 	return servers
 }

internal/models/getservers_test.go

@@ -69,7 +69,7 @@ func Test_AllServers_GetCopy(t *testing.T) {
 		Protonvpn: ProtonvpnServers{
 			Servers: []ProtonvpnServer{{
 				EntryIP: net.IP{1, 2, 3, 4},
-				ExitIP:  net.IP{1, 2, 3, 4},
+				ExitIPs: []net.IP{{1, 2, 3, 4}},
 			}},
 		},
 		Purevpn: PurevpnServers{

internal/models/server.go

@@ -107,13 +107,13 @@ type PrivatevpnServer struct {
 }
 
 type ProtonvpnServer struct {
-	Country  string `json:"country"`
-	Region   string `json:"region"`
-	City     string `json:"city"`
-	Name     string `json:"name"`
-	Hostname string `json:"hostname"`
-	EntryIP  net.IP `json:"entry_ip"`
-	ExitIP   net.IP `json:"exit_ip"` // TODO verify it matches with public IP once connected
+	Country  string   `json:"country"`
+	Region   string   `json:"region"`
+	City     string   `json:"city"`
+	Name     string   `json:"name"`
+	Hostname string   `json:"hostname"`
+	EntryIP  net.IP   `json:"entry_ip"`
+	ExitIPs  []net.IP `json:"exit_ip"` // TODO verify it matches with public IP once connected
 }
 
 type PurevpnServer struct {

internal/storage/hardcoded_test.go

@@ -106,7 +106,7 @@ func Test_versions(t *testing.T) {
 		"Protonvpn": {
 			model:   models.ProtonvpnServer{},
 			version: allServers.Protonvpn.Version,
-			digest:  "b964085b",
+			digest:  "4cb74c3a",
 		},
 		"Purevpn": {
 			model:   models.PurevpnServer{},

internal/updater/providers/protonvpn/iptoserver.go

@@ -0,0 +1,37 @@
+package protonvpn
+
+import (
+	"net"
+
+	"github.com/qdm12/gluetun/internal/models"
+)
+
+type ipToServer map[string]models.ProtonvpnServer
+
+func (its ipToServer) add(country, region, city, name, hostname string,
+	entryIP, exitIP net.IP) {
+	key := entryIP.String()
+
+	server, ok := its[key]
+	if !ok {
+		server.Country = country
+		server.Region = region
+		server.City = city
+		server.Name = name
+		server.Hostname = hostname
+		server.EntryIP = entryIP
+		server.ExitIPs = []net.IP{exitIP}
+	} else {
+		server.ExitIPs = append(server.ExitIPs, exitIP)
+	}
+
+	its[key] = server
+}
+
+func (its ipToServer) toServersSlice() (servers []models.ProtonvpnServer) {
+	servers = make([]models.ProtonvpnServer, 0, len(its))
+	for _, server := range its {
+		servers = append(servers, server)
+	}
+	return servers
+}

internal/updater/providers/protonvpn/servers.go

@@ -33,63 +33,46 @@ func GetServers(ctx context.Context, client *http.Client, minServers int) (
 			ErrNotEnoughServers, count, minServers)
 	}
 
-	servers = make([]models.ProtonvpnServer, 0, count)
+	ipToServer := make(ipToServer, count)
 	for _, logicalServer := range data.LogicalServers {
+		region := getStringValue(logicalServer.Region)
+		city := getStringValue(logicalServer.City)
+		name := logicalServer.Name
 		for _, physicalServer := range logicalServer.Servers {
-			server, warning, err := makeServer(
-				physicalServer, logicalServer, countryCodes)
+			if physicalServer.Status == 0 { // disabled so skip server
+				warnings = append(warnings,
+					"ignoring server "+physicalServer.Domain+" with status 0")
+				continue
+			}
 
+			hostname := physicalServer.Domain
+			entryIP := physicalServer.EntryIP
+			exitIP := physicalServer.ExitIP
+
+			// Note: for multi-hop use the server name or hostname
+			// instead of the country
+			countryCode := logicalServer.ExitCountry
+			country, warning := codeToCountry(countryCode, countryCodes)
 			if warning != "" {
 				warnings = append(warnings, warning)
 			}
 
-			if err != nil {
-				warnings = append(warnings, err.Error())
-				continue
-			}
-
-			servers = append(servers, server)
+			ipToServer.add(country, region, city, name, hostname, entryIP, exitIP)
 		}
 	}
 
-	if len(servers) < minServers {
+	if len(ipToServer) < minServers {
 		return nil, warnings, fmt.Errorf("%w: %d and expected at least %d",
-			ErrNotEnoughServers, len(servers), minServers)
+			ErrNotEnoughServers, len(ipToServer), minServers)
 	}
 
+	servers = ipToServer.toServersSlice()
+
 	sortServers(servers)
 
 	return servers, warnings, nil
 }
 
-var errServerStatusZero = errors.New("ignoring server with status 0")
-
-func makeServer(physical physicalServer, logical logicalServer,
-	countryCodes map[string]string) (server models.ProtonvpnServer,
-	warning string, err error) {
-	if physical.Status == 0 {
-		return server, "", fmt.Errorf("%w: %s",
-			errServerStatusZero, physical.Domain)
-	}
-
-	countryCode := logical.ExitCountry
-	country, warning := codeToCountry(countryCode, countryCodes)
-
-	server = models.ProtonvpnServer{
-		// Note: for multi-hop use the server name or hostname
-		// instead of the country
-		Country:  country,
-		Region:   getStringValue(logical.Region),
-		City:     getStringValue(logical.City),
-		Name:     logical.Name,
-		Hostname: physical.Domain,
-		EntryIP:  physical.EntryIP,
-		ExitIP:   physical.ExitIP,
-	}
-
-	return server, warning, nil
-}
-
 func getStringValue(ptr *string) string {
 	if ptr == nil {
 		return ""