380 lines
8.1 KiB
C
380 lines
8.1 KiB
C
/****************************************************************************
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* This file is part of the project AqHome.
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* AqHome (c) by 2025 Martin Preuss, all rights reserved.
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*
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* The license for this file can be found in the file COPYING which you
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* should have received along with this file.
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****************************************************************************/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include "./tcpd_object_p.h"
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#include <aqhome/events2/fdobject.h>
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#include <gwenhywfar/inherit.h>
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#include <gwenhywfar/debug.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <errno.h>
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#include <string.h>
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#define MAX_BACKLOG 10
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enum {
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AQH_TCPD_OBJECT_SLOT_SOCKETREADY=1
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};
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GWEN_INHERIT(AQH_OBJECT, AQH_TCPD_OBJECT)
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/* ------------------------------------------------------------------------------------------------
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* forward declarations
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* ------------------------------------------------------------------------------------------------
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*/
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static void GWENHYWFAR_CB _freeData(void *bp, void *p);
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static int _handleSignal(AQH_OBJECT *o, uint32_t slotId, AQH_OBJECT *senderObject, int param1, void *param2);
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static int _handleSocketReady(AQH_OBJECT *o);
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static int _createListeningSocket(const char *addr, int port);
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static int _socketSetReuseAddress(int sk, int fl);
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static int _socketSetBlocking(int sk, int fl);
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static int _translateHError(int herr);
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static int _setHostAddr(struct in_addr *inetAddr, const char *sAddr);
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static int _setHostName(struct in_addr *inetAddr, const char *sAddr);
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static int _acceptConnection(int serverSocket);
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/* ------------------------------------------------------------------------------------------------
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* implementations
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* ------------------------------------------------------------------------------------------------
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*/
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AQH_OBJECT *AQH_TcpdObject_new(AQH_EVENT_LOOP *eventLoop)
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{
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AQH_OBJECT *o;
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AQH_TCPD_OBJECT *xo;
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o=AQH_Object_new(eventLoop);
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GWEN_NEW_OBJECT(AQH_TCPD_OBJECT, xo);
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GWEN_INHERIT_SETDATA(AQH_OBJECT, AQH_TCPD_OBJECT, o, xo, _freeData);
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xo->fdSocket=-1;
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AQH_Object_SetSignalHandlerFn(o, _handleSignal);
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return o;
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}
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void GWENHYWFAR_CB _freeData(GWEN_UNUSED void *bp, void *p)
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{
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AQH_TCPD_OBJECT *xo;
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xo=(AQH_TCPD_OBJECT*) p;
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if (xo->fdObject)
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AQH_Object_free(xo->fdObject);
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if (xo->fdSocket)
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close(xo->fdSocket);
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GWEN_FREE_OBJECT(xo);
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}
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int AQH_TcpdObject_StartListening(AQH_OBJECT *o, const char *addr, int port)
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{
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if (o) {
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AQH_TCPD_OBJECT *xo;
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xo=GWEN_INHERIT_GETDATA(AQH_OBJECT, AQH_TCPD_OBJECT, o);
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if (xo) {
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if (xo->fdSocket<0) {
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int rv;
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rv=_createListeningSocket(addr, port);
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if (rv<0) {
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DBG_INFO(AQH_LOGDOMAIN, "here (%d)", rv);
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return rv;
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}
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xo->fdSocket=rv;
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/* create object for readable socket, connect to THIS, enable */
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xo->fdObject=AQH_FdObject_new(AQH_Object_GetEventLoop(o), rv, AQH_FDOBJECT_FDMODE_READ);
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AQH_Object_AddLink(xo->fdObject, AQH_FDOBJECT_SIGNAL_ISREADY, AQH_TCPD_OBJECT_SLOT_SOCKETREADY, o);
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AQH_Object_Enable(xo->fdObject);
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}
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}
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}
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return GWEN_ERROR_GENERIC;
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}
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void AQH_TcpdObject_StopListening(AQH_OBJECT *o)
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{
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if (o) {
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AQH_TCPD_OBJECT *xo;
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xo=GWEN_INHERIT_GETDATA(AQH_OBJECT, AQH_TCPD_OBJECT, o);
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if (xo) {
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if (xo->fdObject) {
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AQH_Object_Disable(xo->fdObject);
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AQH_Object_free(xo->fdObject);
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xo->fdObject=NULL;
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}
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if (xo->fdSocket<0) {
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close(xo->fdSocket);
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xo->fdSocket=-1;
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}
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}
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}
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}
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int _handleSignal(AQH_OBJECT *o,
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uint32_t slotId,
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GWEN_UNUSED AQH_OBJECT *senderObject,
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GWEN_UNUSED int param1,
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GWEN_UNUSED void *param2)
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{
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switch(slotId) {
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case AQH_TCPD_OBJECT_SLOT_SOCKETREADY: return _handleSocketReady(o);
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default:
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break;
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}
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return 0; /* not handled */
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}
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int _handleSocketReady(AQH_OBJECT *o)
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{
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AQH_TCPD_OBJECT *xo;
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xo=GWEN_INHERIT_GETDATA(AQH_OBJECT, AQH_TCPD_OBJECT, o);
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if (xo) {
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int clientSk;
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clientSk=_acceptConnection(xo->fdSocket);
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if (clientSk<0) {
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DBG_INFO(AQH_LOGDOMAIN, "here (%d)", clientSk);
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}
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else {
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if (0==AQH_Object_EmitSignal(o, AQH_TCPD_OBJECT_SIGNAL_NEWCONN, clientSk, NULL)) {
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DBG_INFO(AQH_LOGDOMAIN, "New connection not handled");
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close(clientSk);
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}
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}
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return 1; /* handled */
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}
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return 0; /* not handled */
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}
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int _createListeningSocket(const char *addr, int port)
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{
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int sk;
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struct sockaddr_in inetAddr;
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int rv;
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memset(&inetAddr, 0, sizeof(inetAddr));
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inetAddr.sin_family=AF_INET;
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rv=_setHostAddr(&inetAddr.sin_addr, addr); /* try tuple */
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if (rv<0) {
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rv=_setHostName(&inetAddr.sin_addr, addr); /* lookup name */
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if (rv<0) {
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DBG_INFO(AQH_LOGDOMAIN, "here (%d)", rv);
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return rv;
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}
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}
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inetAddr.sin_port=htons(port);
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sk=socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
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if (sk<0) {
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DBG_INFO(AQH_LOGDOMAIN, "socket(): %s", strerror(errno));
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return GWEN_ERROR_IO;
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}
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rv=_socketSetReuseAddress(sk, 1);
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if (rv<0) {
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DBG_INFO(AQH_LOGDOMAIN, "here (%d)", rv);
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close(sk);
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return rv;
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}
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rv=_socketSetBlocking(sk, 0);
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if (rv<0) {
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DBG_INFO(AQH_LOGDOMAIN, "here (%d)", rv);
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close(sk);
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return rv;
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}
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rv=bind(sk, (struct sockaddr*) &inetAddr, sizeof(inetAddr));
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if (rv<0) {
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DBG_INFO(AQH_LOGDOMAIN, "here (%d)", rv);
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close(sk);
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return rv;
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}
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rv=listen(sk, MAX_BACKLOG);
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if (rv<0) {
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DBG_INFO(AQH_LOGDOMAIN, "here (%d)", rv);
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close(sk);
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return rv;
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}
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return sk;
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}
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int _setHostAddr(struct in_addr *inetAddr, const char *sAddr)
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{
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inetAddr->s_addr=0;
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if (!inet_aton(sAddr, inetAddr)) {
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DBG_ERROR(AQH_LOGDOMAIN, "Invalid address \"%s\"", sAddr);
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return GWEN_ERROR_INVALID;
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}
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return 0;
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}
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int _setHostName(struct in_addr *inetAddr, const char *sAddr)
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{
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struct hostent *he;
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he=gethostbyname(sAddr);
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if (!he) {
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DBG_ERROR(AQH_LOGDOMAIN, "gethostbyname(\"%s\"): %s", sAddr, hstrerror(h_errno));
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return _translateHError(h_errno);
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}
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/* name resolved, store address */
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memcpy(inetAddr, he->h_addr_list[0], sizeof(struct in_addr));
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return 0;
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}
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int _socketSetBlocking(int sk, int fl)
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{
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int prevFlags;
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int newFlags;
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/* get current socket flags */
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prevFlags=fcntl(sk, F_GETFL);
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if (prevFlags==-1) {
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DBG_INFO(AQH_LOGDOMAIN, "fcntl(): %s", strerror(errno));
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return GWEN_ERROR_IO;
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}
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/* set nonblocking/blocking */
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if (fl)
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newFlags=prevFlags&(~O_NONBLOCK);
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else
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newFlags=prevFlags|O_NONBLOCK;
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if (-1==fcntl(sk, F_SETFL, newFlags)) {
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DBG_INFO(AQH_LOGDOMAIN, "fcntl(): %s", strerror(errno));
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return GWEN_ERROR_IO;
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}
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prevFlags=fcntl(sk, F_GETFL);
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if (prevFlags!=newFlags) {
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DBG_ERROR(AQH_LOGDOMAIN, "fcntl() did not set flags correctly (%08x!=%08x)", prevFlags, newFlags);
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return GWEN_ERROR_IO;
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}
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return 0;
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}
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int _socketSetReuseAddress(int sk, int fl)
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{
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if (setsockopt(sk, SOL_SOCKET, SO_REUSEADDR, &fl, sizeof(fl))) {
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DBG_INFO(AQH_LOGDOMAIN, "setsockopt(): %s", strerror(errno));
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return GWEN_ERROR_IO;
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}
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return 0;
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}
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int _translateHError(int herr)
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{
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int rv;
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switch (herr) {
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case HOST_NOT_FOUND:
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rv=GWEN_ERROR_HOST_NOT_FOUND;
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break;
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#ifdef NO_ADDRESS
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case NO_ADDRESS:
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rv=GWEN_ERROR_NO_ADDRESS;
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break;
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#endif
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case NO_RECOVERY:
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rv=GWEN_ERROR_NO_RECOVERY;
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break;
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case TRY_AGAIN:
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rv=GWEN_ERROR_TRY_AGAIN;
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break;
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default:
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rv=GWEN_ERROR_UNKNOWN_DNS_ERROR;
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break;
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} /* switch */
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return rv;
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}
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int _acceptConnection(int serverSocket)
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{
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int clientSk;
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struct sockaddr_in inetAddr;
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unsigned int socklen;
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int rv;
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socklen=sizeof(inetAddr);
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clientSk=accept(serverSocket, (struct sockaddr*) &inetAddr, &socklen);
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if (clientSk<0) {
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DBG_INFO(AQH_LOGDOMAIN, "accept(): %s", strerror(errno));
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return GWEN_ERROR_IO;
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}
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DBG_INFO(AQH_LOGDOMAIN, "Accepted incoming connection");
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rv=_socketSetBlocking(clientSk, 0);
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if (rv<0) {
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DBG_INFO(AQH_LOGDOMAIN, "here (%d)", rv);
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close(clientSk);
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return rv;
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}
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return clientSk;
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}
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