Fix build error on FreeBSD. Closes #1243

core/chat/chat.go

@@ -20,7 +20,7 @@ func Start(getStatusFunc func() models.Status) error {
 
 	go _server.Run()
 
-	log.Traceln("Chat server started with max connection count of", _server.maxClientCount)
+	log.Traceln("Chat server started with max connection count of", _server.maxSocketConnectionLimit)
 
 	return nil
 }

core/chat/concurrentConnections.go

@@ -0,0 +1,24 @@
+// +build !freebsd
+
+package chat
+
+import (
+	"syscall"
+
+	log "github.com/sirupsen/logrus"
+)
+
+func setSystemConcurrentConnectionLimit(limit int64) {
+	var rLimit syscall.Rlimit
+	if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rLimit); err != nil {
+		panic(err)
+	}
+
+	originalLimit := rLimit.Cur
+	rLimit.Cur = uint64(limit)
+	if err := syscall.Setrlimit(syscall.RLIMIT_NOFILE, &rLimit); err != nil {
+		panic(err)
+	}
+
+	log.Traceln("Max process connection count changed from system limit of", originalLimit, "to", limit)
+}

core/chat/concurrentConnections_freebsd.go

@@ -0,0 +1,24 @@
+// +build freebsd
+
+package chat
+
+import (
+	"syscall"
+
+	log "github.com/sirupsen/logrus"
+)
+
+func setSystemConcurrentConnectionLimit(limit int64) {
+	var rLimit syscall.Rlimit
+	if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rLimit); err != nil {
+		panic(err)
+	}
+
+	originalLimit := rLimit.Cur
+	rLimit.Cur = int64(limit)
+	if err := syscall.Setrlimit(syscall.RLIMIT_NOFILE, &rLimit); err != nil {
+		panic(err)
+	}
+
+	log.Traceln("Max process connection count changed from system limit of", originalLimit, "to", limit)
+}

core/chat/server.go

@@ -21,10 +21,10 @@ import (
 var _server *ChatServer
 
 type ChatServer struct {
-	mu             sync.RWMutex
-	seq            uint
-	clients        map[uint]*ChatClient
-	maxClientCount uint
+	mu                       sync.RWMutex
+	seq                      uint
+	clients                  map[uint]*ChatClient
+	maxSocketConnectionLimit int64
 
 	// send outbound message payload to all clients
 	outbound chan []byte
@@ -37,12 +37,15 @@ type ChatServer struct {
 }
 
 func NewChat() *ChatServer {
+	maximumConcurrentConnectionLimit := getMaximumConcurrentConnectionLimit()
+	setSystemConcurrentConnectionLimit(maximumConcurrentConnectionLimit)
+
 	server := &ChatServer{
-		clients:        map[uint]*ChatClient{},
-		outbound:       make(chan []byte),
-		inbound:        make(chan chatClientEvent),
-		unregister:     make(chan uint),
-		maxClientCount: handleMaxConnectionCount(),
+		clients:                  map[uint]*ChatClient{},
+		outbound:                 make(chan []byte),
+		inbound:                  make(chan chatClientEvent),
+		unregister:               make(chan uint),
+		maxSocketConnectionLimit: maximumConcurrentConnectionLimit,
 	}
 
 	return server
@@ -136,8 +139,8 @@ func (s *ChatServer) HandleClientConnection(w http.ResponseWriter, r *http.Reque
 	}
 
 	// Limit concurrent chat connections
-	if uint(len(s.clients)) >= s.maxClientCount {
-		log.Warnln("rejecting incoming client connection as it exceeds the max client count of", s.maxClientCount)
+	if int64(len(s.clients)) >= s.maxSocketConnectionLimit {
+		log.Warnln("rejecting incoming client connection as it exceeds the max client count of", s.maxSocketConnectionLimit)
 		_, _ = w.Write([]byte(events.ErrorMaxConnectionsExceeded))
 		return
 	}

core/chat/utils.go

@@ -1,29 +1,15 @@
 package chat
 
-import (
-	"syscall"
+import "syscall"
 
-	log "github.com/sirupsen/logrus"
-)
-
-// Set the soft file handler limit as 70% of
-// the max as the client connection limit.
-func handleMaxConnectionCount() uint {
+func getMaximumConcurrentConnectionLimit() int64 {
 	var rLimit syscall.Rlimit
 	if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rLimit); err != nil {
 		panic(err)
 	}
 
-	originalLimit := rLimit.Cur
-	// Set the limit to 70% of max so the machine doesn't die even if it's maxed out for some reason.
-	proposedLimit := int(float32(rLimit.Max) * 0.7)
-
-	rLimit.Cur = uint64(proposedLimit)
-	if err := syscall.Setrlimit(syscall.RLIMIT_NOFILE, &rLimit); err != nil {
-		panic(err)
-	}
-
-	log.Traceln("Max process connection count increased from", originalLimit, "to", proposedLimit)
+	// Return the limit to 70% of max so the machine doesn't die even if it's maxed out for some reason.
+	proposedLimit := int64(float32(rLimit.Max) * 0.7)
 
-	return uint(float32(rLimit.Cur))
+	return proposedLimit
 }