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-rw-r--r--src/common/network.c1061
1 files changed, 0 insertions, 1061 deletions
diff --git a/src/common/network.c b/src/common/network.c
deleted file mode 100644
index a40cbd602..000000000
--- a/src/common/network.c
+++ /dev/null
@@ -1,1061 +0,0 @@
-//
-// Network Subsystem (previously known as socket system)
-//
-// Author: Florian Wilkemeyer <fw@f-ws.de>
-//
-// Copyright (c) rAthena Project (www.rathena.org) - Licensed under GNU GPL
-// For more information, see LICENCE in the main folder
-//
-//
-//#ifdef HAVE_ACCETP4
-#define _GNU_SOURCE
-//#endif
-
-#include <stdio.h>
-#include <string.h>
-#include <unistd.h>
-#include <errno.h>
-
-#include <sys/types.h>
-#include <sys/fcntl.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <netinet/tcp.h>
-#include <arpa/inet.h>
-
-
-#include "../common/cbasetypes.h"
-#include "../common/showmsg.h"
-#include "../common/timer.h"
-#include "../common/evdp.h"
-#include "../common/netbuffer.h"
-
-#include "../common/network.h"
-
-#define ENABLE_IPV6
-#define HAVE_ACCEPT4
-#define EVENTS_PER_CYCLE 10
-#define PARANOID_CHECKS
-
-// Local Vars (settings..)
-static int l_ListenBacklog = 64;
-
-//
-// Global Session Array (previously exported as session[]
-//
-SESSION g_Session[MAXCONN];
-
-
-//
-static bool onSend(int32 fd);
-
-
-#define _network_free_netbuf_async( buf ) add_timer( 0, _network_async_free_netbuf_proc, 0, (intptr_t)(buf))
-static int _network_async_free_netbuf_proc(int tid, unsigned int tick, int id, intptr_t data){
- // netbuf is in data
- netbuffer_put( (netbuf)data );
-
- return 0;
-}//end: _network_async_free_netbuf_proc()
-
-
-
-void network_init(){
- SESSION *s;
- int32 i;
-
- memset(g_Session, 0x00, (sizeof(SESSION) * MAXCONN) );
-
- for(i = 0; i < MAXCONN; i++){
- s = &g_Session[i];
-
- s->type = NST_FREE;
- s->disconnect_in_progress = false;
-
- }
-
- // Initialize the correspondig event dispatcher
- evdp_init();
-
- //
- add_timer_func_list(_network_async_free_netbuf_proc, "_network_async_free_netbuf_proc");
-
-}//end: network_init()
-
-
-void network_final(){
-
- // @TODO:
- // .. disconnect and cleanup everything!
-
- evdp_final();
-
-}//end: network_final()
-
-
-void network_do(){
- struct EVDP_EVENT l_events[EVENTS_PER_CYCLE];
- register struct EVDP_EVENT *ev;
- register int n, nfds;
- register SESSION *s;
-
- nfds = evdp_wait( l_events, EVENTS_PER_CYCLE, 1000); // @TODO: timer_getnext()
-
- for(n = 0; n < nfds; n++){
- ev = &l_events[n];
- s = &g_Session[ ev->fd ];
-
- if(ev->events & EVDP_EVENT_HUP){
- network_disconnect( ev->fd );
- continue; // no further event processing.
- }// endif vent is HUP (disconnect)
-
-
- if(ev->events & EVDP_EVENT_IN){
-
- if(s->onRecv != NULL){
- if( false == s->onRecv(ev->fd) ){
- network_disconnect(ev->fd);
- continue; // ..
- }
- }else{
- ShowError("network_do: fd #%u has no onRecv proc set. - disconnecting\n", ev->fd);
- network_disconnect(ev->fd);
- continue;
- }
-
- }// endif event is IN (recv)
-
-
- if(ev->events & EVDP_EVENT_OUT){
- if(s->onSend != NULL){
- if( false == s->onSend(ev->fd) ){
- network_disconnect(ev->fd);
- continue;
- }
- }else{
- ShowError("network_do: fd #%u has no onSend proc set. - disconnecting\n", ev->fd);
- network_disconnect(ev->fd);
- continue;
- }
- }// endif event is OUT (send)
-
- }//endfor
-
-}//end: network_do()
-
-
-static bool _setnonblock(int32 fd){
- int flags = fcntl(fd, F_GETFL, 0);
- if(fcntl(fd, F_SETFL, flags | O_NONBLOCK) != 0)
- return false;
-
- return true;
-}//end: _setnonblock()
-
-
-static bool _network_accept(int32 fd){
- SESSION *listener = &g_Session[fd];
- SESSION *s;
- union{
- struct sockaddr_in v4;
-#ifdef ENABLE_IPV6
- struct sockaddr_in6 v6;
-#endif
- } _addr;
- int newfd;
- socklen_t addrlen;
- struct sockaddr *addr;
-
- // Accept until OS returns - nothing to accept anymore
- // - this is required due to our EVDP abstraction. (which handles on listening sockets similar to epoll's EPOLLET flag.)
- while(1){
-#ifdef ENABLE_IPV6
- if(listener->v6 == true){
- addrlen = sizeof(_addr.v6);
- addr = (struct sockaddr*)&_addr.v6;
- }else{
-#endif
- addrlen = sizeof(_addr.v4);
- addr = (struct sockaddr*)&_addr.v4;
-#ifdef ENABLE_IPV6
- }
-#endif
-
-#ifdef HAVE_ACCEPT4
- newfd = accept4(fd, addr, &addrlen, SOCK_NONBLOCK);
-#else
- newfd = accept(fd, addr, &addrlen);
-#endif
-
- if(newfd == -1){
- if(errno == EAGAIN || errno == EWOULDBLOCK)
- break; // this is fully valid & whished., se explaination on top of while(1)
-
- // Otherwis .. we have serious problems :( seems tahat our listner has gone away..
- // @TODO handle this ..
- ShowError("_network_accept: accept() returned error. closing listener. (errno: %u / %s)\n", errno, strerror(errno));
-
- return false; // will call disconnect after return.
- //break;
- }
-
-#ifndef HAVE_ACCEPT4 // no accept4 means, we have to set nonblock by ourself. ..
- if(_setnonblock(newfd) == false){
- ShowError("_network_accept: failed to set newly accepted connection nonblocking (errno: %u / %s). - disconnecting.\n", errno, strerror(errno));
- close(newfd);
- continue;
- }
-#endif
-
- // Check connection limits.
- if(newfd >= MAXCONN){
- ShowError("_network_accept: failed to accept connection - MAXCONN (%u) exceeded.\n", MAXCONN);
- close(newfd);
- continue; // we have to loop over the events (and disconnect them too ..) but otherwise we would leak event notifications.
- }
-
-
- // Create new Session.
- s = &g_Session[newfd];
- s->type = NST_CLIENT;
-
- // The new connection inherits listenr's handlers.
- s->onDisconnect = listener->onDisconnect;
- s->onConnect = listener->onConnect; // maybe useless but .. fear the future .. :~
-
- // Register the new connection @ EVDP
- if( evdp_addclient(newfd, &s->evdp_data) == false){
- ShowError("_network_accept: failed to accept connection - event subsystem returned an error.\n");
- close(newfd);
- s->type = NST_FREE;
- }
-
- // Call the onConnect handler on the listener.
- if( listener->onConnect(newfd) == false ){
- // Resfused by onConnect handler..
- evdp_remove(newfd, &s->evdp_data);
-
- close(newfd);
- s->type = NST_FREE;
-
- s->data = NULL; // be on the safe side ~ !
- continue;
- }
-
-
- }
-
- return true;
-}//end: _network_accept()
-
-
-void network_disconnect(int32 fd){
- SESSION *s = &g_Session[fd];
- netbuf b, bn;
-
- // Prevent recursive calls
- // by wrong implemented on disconnect handlers.. and such..
- if(s->disconnect_in_progress == true)
- return;
-
- s->disconnect_in_progress = true;
-
-
- // Disconnect Todo:
- // - Call onDisconnect Handler
- // - Release all Assigned buffers.
- // - remove from event system (notifications)
- // - cleanup session structure
- // - close connection.
- //
-
- if(s->onDisconnect != NULL &&
- s->type != NST_LISTENER){
-
- s->onDisconnect( fd );
- }
-
- // Read Buffer
- if(s->read.buf != NULL){
- netbuffer_put(s->read.buf);
- s->read.buf = NULL;
- }
-
- // Write Buffer(s)
- b = s->write.buf;
- while(1){
- if(b == NULL) break;
-
- bn = b->next;
-
- netbuffer_put(b);
-
- b = bn;
- }
- s->write.buf = NULL;
- s->write.buf_last = NULL;
-
- s->write.n_outstanding = 0;
- s->write.max_outstanding = 0;
-
-
- // Remove from event system.
- evdp_remove(fd, &s->evdp_data);
-
- // Cleanup Session Structure.
- s->type = NST_FREE;
- s->data = NULL; // no application level data assigned
- s->disconnect_in_progress = false;
-
-
- // Close connection
- close(fd);
-
-}//end: network_disconnect()
-
-
-int32 network_addlistener(bool v6, const char *addr, uint16 port){
- SESSION *s;
- int optval, fd;
-
-#if !defined(ENABLE_IPV6)
- if(v6 == true){
- ShowError("network_addlistener(%c, '%s', %u): this release has no IPV6 support.\n", (v6==true?'t':'f'), addr, port);
- return -1;
- }
-#endif
-
-
-#ifdef ENABLE_IPV6
- if(v6 == true)
- fd = socket(AF_INET6, SOCK_STREAM, 0);
- else
-#endif
- fd = socket(AF_INET, SOCK_STREAM, 0);
-
- // Error?
- if(fd == -1){
- ShowError("network_addlistener(%c, '%s', %u): socket() failed (errno: %u / %s)\n", (v6==true?'t':'f'), addr, port, errno, strerror(errno));
- return -1;
- }
-
- // Too many connections?
- if(fd >= MAXCONN){
- ShowError("network_addlistener(%c, '%s', %u): cannot create listener, exceeds more than supported connections (%u).\n", (v6==true?'t':'f'), addr, port, MAXCONN);
- close(fd);
- return -1;
- }
-
-
- s = &g_Session[fd];
- if(s->type != NST_FREE){ // additional checks.. :)
- ShowError("network_addlistener(%c, '%s', %u): failed, got fd #%u which is already in use in local session table?!\n", (v6==true?'t':'f'), addr, port, fd);
- close(fd);
- return -1;
- }
-
-
- // Fill ip addr structs
-#ifdef ENABLE_IPV6
- if(v6 == true){
- memset(&s->addr.v6, 0x00, sizeof(s->addr.v6));
- s->addr.v6.sin6_family = AF_INET6;
- s->addr.v6.sin6_port = htons(port);
- if(inet_pton(AF_INET6, addr, &s->addr.v6.sin6_addr) != 1){
- ShowError("network_addlistener(%c, '%s', %u): failed to parse the given IPV6 address.\n", (v6==true?'t':'f'), addr, port);
- close(fd);
- return -1;
- }
-
- }else{
-#endif
- memset(&s->addr.v4, 0x00, sizeof(s->addr.v4));
- s->addr.v4.sin_family = AF_INET;
- s->addr.v4.sin_port = htons(port);
- s->addr.v4.sin_addr.s_addr = inet_addr(addr);
-#ifdef ENABLE_IPV6
- }
-#endif
-
-
- // if OS has support for SO_REUSEADDR, apply the flag
- // so the address could be used when there're still time_wait sockets outstanding from previous application run.
-#ifdef SO_REUSEADDR
- optval=1;
- setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval));
-#endif
-
- // Bind
-#ifdef ENABLE_IPV6
- if(v6 == true){
- if( bind(fd, (struct sockaddr*)&s->addr.v6, sizeof(s->addr.v6)) == -1) {
- ShowError("network_addlistener(%c, '%s', %u): bind failed (errno: %u / %s)\n", (v6==true?'t':'f'), addr, port, errno, strerror(errno));
- close(fd);
- return -1;
- }
- }else{
-#endif
- if( bind(fd, (struct sockaddr*)&s->addr.v4, sizeof(s->addr.v4)) == -1) {
- ShowError("network_addlistener(%c, '%s', %u): bind failed (errno: %u / %s)\n", (v6==true?'t':'f'), addr, port, errno, strerror(errno));
- close(fd);
- return -1;
- }
-#ifdef ENABLE_IPV6
- }
-#endif
-
- if( listen(fd, l_ListenBacklog) == -1){
- ShowError("network_addlistener(%c, '%s', %u): listen failed (errno: %u / %s)\n", (v6==true?'t':'f'), addr, port, errno, strerror(errno));
- close(fd);
- return -1;
- }
-
-
- // Set to nonblock!
- if(_setnonblock(fd) == false){
- ShowError("network_addlistener(%c, '%s', %u): cannot set to nonblock (errno: %u / %s)\n", (v6==true?'t':'f'), addr, port, errno, strerror(errno));
- close(fd);
- return -1;
- }
-
-
- // Rgister @ evdp.
- if( evdp_addlistener(fd, &s->evdp_data) != true){
- ShowError("network_addlistener(%c, '%s', %u): eventdispatcher subsystem returned an error.\n", (v6==true?'t':'f'), addr, port);
- close(fd);
- return -1;
- }
-
-
- // Apply flags on Session array for this conneciton.
- if(v6 == true) s->v6 = true;
- else s->v6 = false;
-
- s->type = NST_LISTENER;
- s->onRecv = _network_accept;
-
- ShowStatus("Added Listener on '%s':%u\n", addr, port, (v6==true ? "(ipv6)":"(ipv4)") );
-
- return fd;
-}//end: network_addlistener()
-
-
-static bool _network_connect_establishedHandler(int32 fd){
- register SESSION *s = &g_Session[fd];
- int val;
- socklen_t val_len;
-
- if(s->type == NST_FREE)
- return true; // due to multiple non coalesced event notifications
- // this can happen .. when a previous handled event has already disconnected the connection
- // within the same cycle..
-
- val = -1;
- val_len = sizeof(val);
- getsockopt(fd, SOL_SOCKET, SO_ERROR, &val, &val_len);
-
- if(val != 0){
- // :( .. cleanup session..
- s->type = NST_FREE;
- s->onSend = NULL;
- s->onConnect = NULL;
- s->onDisconnect = NULL;
-
- evdp_remove(fd, &s->evdp_data);
- close(fd);
-
- return true; // we CANT return false,
- // becuase the normal disconnect procedure would execute the ondisconnect handler, which we dont want .. in this case.
- }else{
- // ok
- if(s->onConnect(fd) == false) {
- // onConnect handler has refused the connection ..
- // cleanup .. and ok
- s->type = NST_FREE;
- s->onSend = NULL;
- s->onConnect = NULL;
- s->onDisconnect = NULL;
-
- evdp_remove(fd, &s->evdp_data);
- close(fd);
-
- return true; // we dnot want the ondisconnect handler to be executed, so its okay to handle this by ourself.
- }
-
- // connection established !
- //
- if( evdp_outgoingconnection_established(fd, &s->evdp_data) == false ){
- return false; // we want the normal disconnect procedure.. with call to ondisconnect handler.
- }
-
- s->onSend = NULL;
-
- ShowStatus("#%u connection successfull!\n", fd);
- }
-
- return true;
-}//end: _network_connect_establishedHandler()
-
-
-int32 network_connect(bool v6,
- const char *addr,
- uint16 port,
- const char *from_addr,
- uint16 from_port,
- bool (*onConnectionEstablishedHandler)(int32 fd),
- void (*onConnectionLooseHandler)(int32 fd)
-){
- register SESSION *s;
- int32 fd, optval, ret;
- struct sockaddr_in ip4;
-#ifdef ENABLE_IPV6
- struct sockaddr_in6 ip6;
-#endif
-
-#ifdef ENABLE_IPV6
- if(v6 == true)
- fd = socket(AF_INET6, SOCK_STREAM, 0);
- else
-#endif
- fd = socket(AF_INET, SOCK_STREAM, 0);
-
-#ifndef ENABLE_IPV6
- // check..
- if(v6 == true){
- ShowError("network_connect(%c, '%s', %u...): tried to create an ipv6 connection, IPV6 is not supported in this release.\n", (v6==true?'t':'f'), addr, port);
- return -1;
- }
-#endif
-
- // check connection limits.
- if(fd >= MAXCONN){
- ShowError("network_connect(%c, '%s', %u...): cannot create new connection, exceeeds more than supported connections (%u)\n", (v6==true?'t':'f'), addr, port );
- close(fd);
- return -1;
- }
-
-
- // Originating IP/Port pair given ?
- if(from_addr != NULL && *from_addr != 0){
- //..
- #ifdef SO_REUSEADDR
- optval=1;
- setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval));
- #endif
-
- #ifdef ENABLE_IPV6
- if(v6 == true){
- memset(&ip6, 0x00, sizeof(ip6));
- ip6.sin6_family = AF_INET6;
- ip6.sin6_port = htons(from_port);
-
- if(inet_pton(AF_INET6, from_addr, &ip6.sin6_addr) != 1){
- ShowError("network_connect(%c, '%s', %u...): cannot parse originating (from) IPV6 address (errno: %u / %s)\n", (v6==true?'t':'f'), addr, port, errno, strerror(errno));
- close(fd);
- return -1;
- }
-
- ret = bind(fd, (struct sockaddr*)&ip6, sizeof(ip6));
- }else{
- #endif
- memset(&ip4, 0x00, sizeof(ip4));
-
- ip4.sin_family = AF_INET;
- ip4.sin_port = htons(from_port);
- ip4.sin_addr.s_addr = inet_addr(from_addr);
- ret = bind(fd, (struct sockaddr*)&ip4, sizeof(ip4));
- #ifdef ENABLE_IPV6
- }
- #endif
-
- }
-
-
- // Set non block
- if(_setnonblock(fd) == false){
- ShowError("network_connect(%c, '%s', %u...): cannot set socket to nonblocking (errno: %u / %s)\n", (v6==true?'t':'f'), addr, port, errno, strerror(errno));
- close(fd);
- return -1;
- }
-
-
- // Create ip addr block to connect to ..
-#ifdef ENABLE_IPV6
- if(v6 == true){
- memset(&ip6, 0x00, sizeof(ip6));
- ip6.sin6_family = AF_INET6;
- ip6.sin6_port = htons(port);
-
- if(inet_pton(AF_INET6, addr, &ip6.sin6_addr) != 1){
- ShowError("network_connect(%c, '%s', %u...): cannot parse destination IPV6 address (errno: %u / %s)\n", (v6==true?'t':'f'), addr, port, errno, strerror(errno));
- close(fd);
- return -1;
- }
-
- }else{
-#endif
- memset(&ip4, 0x00, sizeof(ip4));
-
- ip4.sin_family = AF_INET;
- ip4.sin_port = htons(port);
- ip4.sin_addr.s_addr = inet_addr(addr);
-#ifdef ENABLE_IPV6
- }
-#endif
-
-
- // Assign Session..
- s = &g_Session[fd];
- s->type = NST_OUTGOING;
- s->v6 = v6;
- s->onConnect = onConnectionEstablishedHandler;
- s->onDisconnect = onConnectionLooseHandler;
- s->onRecv = NULL;
- s->onSend = _network_connect_establishedHandler;
-#ifdef ENABLE_IPV6
- if(v6 == true)
- memcpy(&s->addr.v6, &ip6, sizeof(ip6));
- else
-#endif
- memcpy(&s->addr.v4, &ip4, sizeof(ip4));
-
- // Register @ EVDP. as outgoing (see doc of the function)
- if(evdp_addconnecting(fd, &s->evdp_data) == false){
- ShowError("network_connect(%c, '%s', %u...): eventdispatcher subsystem returned an error.\n", (v6==true?'t':'f'), addr, port);
-
- // cleanup session x.x..
- s->type = NST_FREE;
- s->onConnect = NULL;
- s->onDisconnect = NULL;
- s->onSend = NULL;
-
- // close, return error code.
- close(fd);
- return -1;
- }
-
-
-#ifdef ENABLE_IPV6
- if(v6 == true)
- ret = connect(fd, (struct sockaddr*)&ip6, sizeof(ip6));
- else
-#endif
- ret = connect(fd, (struct sockaddr*)&ip4, sizeof(ip4));
-
-
- //
- if(ret != 0 && errno != EINPROGRESS){
- ShowWarning("network_connect(%c, '%s', %u...): connection failed (errno: %u / %s)\n", (v6==true?'t':'f'), addr, port, errno, strerror(errno));
-
- // Cleanup session ..
- s->type = NST_FREE;
- s->onConnect = NULL;
- s->onDisconnect = NULL;
- s->onSend = NULL;
-
- // .. remove from evdp and close fd.
- evdp_remove(fd, &s->evdp_data);
- close(fd);
- return -1;
- }
-
-
- // ! The Info Message :~D
- ShowStatus("network_connect fd#%u (%s:%u) in progress.. \n", fd, addr, port);
-
-return fd;
-}//end: network_connect()
-
-
-static bool _onSend(int32 fd){
- register SESSION *s = &g_Session[fd];
- register netbuf buf, buf_next;
- register uint32 szNeeded;
- register int wLen;
-
- if(s->type == NST_FREE)
- return true; // Possible due to multipl non coalsced event notifications
- // so onSend gets called after disconnect caused by an previous vent.
- // we can ignore the call to onSend, then.
-
- buf = s->write.buf;
- while(1){
- if(buf == NULL)
- break;
-
- buf_next = buf->next;
-
-
- szNeeded = (buf->dataLen - s->write.dataPos); // using th session-local .dataPos member, due to shared write buffer support.
-
- // try to write.
- wLen = write(fd, &buf->buf[s->write.dataPos], szNeeded);
- if(wLen == 0){
- return false; // eof.
- }else if(wLen == -1){
- if(errno == EAGAIN || errno == EWOULDBLOCK)
- return true; // dont disconnect / try again later.
-
- // all other errors. .
- return false;
- }
-
- // Wrote data.. =>
- szNeeded -= wLen;
- if(szNeeded > 0){
- // still data left ..
- //
- s->write.dataPos += wLen; // fix offset.
- return true;
- }else{
- // this buffer has been written successfully
- // could be returned to pool.
- netbuffer_put(buf);
- s->write.n_outstanding--; // When threadsafe -> Interlocked here.
- s->write.dataPos = 0;
- }
-
-
- buf = buf_next;
- }
-
- // okay,
- // reaching this part means:
- // while interrupted by break -
- // which means all buffers are written, nothing left
- //
-
- s->write.buf_last = NULL;
- s->write.buf = NULL;
- s->write.n_outstanding = 0;
- s->write.dataPos = 0;
-
- // Remove from event dispatcher (write notification)
- //
- evdp_writable_remove(fd, &s->evdp_data);
-
- return true;
-}//end: _onSend()
-
-
-static bool _onRORecv(int32 fd){
- register SESSION *s = &g_Session[fd];
- register uint32 szNeeded;
- register char *p;
- register int rLen;
-
- if(s->type == NST_FREE)
- return true; // Possible due to multiple non coalesced events by evdp.
- // simply ignore this call returning positive result.
-
- // Initialize p and szNeeded depending on change
- //
- switch(s->read.state){
- case NRS_WAITOP:
- szNeeded = s->read.head_left;
- p = ((char*)&s->read.head[0]) + (2-szNeeded);
- break;
-
- case NRS_WAITLEN:
- szNeeded = s->read.head_left;
- p = ((char*)&s->read.head[1]) + (2-szNeeded);
- break;
-
- case NRS_WAITDATA:{
- register netbuf buf = s->read.buf;
-
- szNeeded = (buf->dataLen - buf->dataPos);
- p = (char*)&buf->buf[ buf->dataPos ];
- }
- break;
-
- default:
- // .. the impossible gets possible ..
- ShowError("_onRORecv: fd #%u has unknown read.state (%d) - disconnecting\n", fd, s->read.state);
- return false;
- break;
- }
-
-
- //
-
- rLen = read(fd, p, szNeeded);
- if(rLen == 0){
- // eof..
- return false;
- }else if(rLen == -1){
-
- if(errno == EAGAIN || errno == EWOULDBLOCK){
- // try again later .. (this case shouldnt happen, because we're event trigered.. but .. sometimes it happens :)
- return true;
- }
-
- // an additional interesting case would be
- // EINTR, this 'could' be handled .. but:
- // posix says that its possible that data gets currupted during irq
- // or data gor read and not reported.., so we'd have a data loss..
- // (which shouldnt happen with stream based protocols such as tcp)
- // its better to disonnect the client in that case.
-
- return false;
- }
-
- //
- // Got Data:
- // next action also depends on current state ..
- //
- szNeeded -= rLen;
- switch(s->read.state){
- case NRS_WAITOP:
-
- if(szNeeded > 0){
- // still data missing ..
- s->read.head_left = szNeeded;
- return true; // wait for completion.
- }else{
- // complete ..
- // next state depends on packet type.
-
- s->read.head[1] = ((uint16*)s->netparser_data)[ s->read.head[0] ]; // store lenght of packet by opcode head[0] to head[1]
-
- if(s->read.head[1] == ROPACKET_UNKNOWN){
- // unknown packet - disconnect
- ShowWarning("_onRORecv: fd #%u got unlnown packet 0x%04x - disconnecting.\n", fd, s->read.head[0]);
- return false;
- }
- else if(s->read.head[1] == ROPACKET_DYNLEN){
- // dynamic length
- // next state: requrie len.
- s->read.state = NRS_WAITLEN;
- s->read.head_left = 2;
- return true; //
- }
- else if(s->read.head[1] == 2){
- // packet has no data (only opcode)
- register netbuf buf = netbuffer_get(2); // :D whoohoo its giant!
-
- NBUFW(buf, 0) = s->read.head[0]; // store opcode @ packet begin.
- buf->dataPos = 2;
- buf->dataLen = 2;
- buf->next = NULL;
-
- // Back to initial state -> Need opcode.
- s->read.state = NRS_WAITOP;
- s->read.head_left = 2;
- s->read.buf = NULL;
-
- // Call completion routine here.
- s->onPacketComplete(fd, s->read.head[0], 2, buf);
-
- return true; // done :)
- }
- else{
- // paket needs .. data ..
- register netbuf buf = netbuffer_get( s->read.head[1] );
-
- NBUFW(buf, 0) = s->read.head[0]; // store opcode @ packet begin.
- buf->dataPos = 2;
- buf->dataLen = s->read.head[1];
- buf->next = NULL;
-
- // attach buffer.
- s->read.buf = buf;
-
- // set state:
- s->read.state = NRS_WAITDATA;
-
- return true;
- }
-
- }//endif: szNeeded > 0 (opcode read completed?)
-
- break;
-
-
- case NRS_WAITLEN:
-
- if(szNeeded > 0){
- // incomplete ..
- s->read.head_left = szNeeded;
- return true;
- }else{
-
- if(s->read.head[1] == 4){
- // packet has no data (only opcode + length)
- register netbuf buf = netbuffer_get( 4 );
-
- NBUFL(buf, 0) = *((uint32*)&s->read.head[0]); // copy Opcode + length to netbuffer using MOVL
- buf->dataPos = 4;
- buf->dataLen = 4;
- buf->next = NULL;
-
- // set initial state (need opcode)
- s->read.state = NRS_WAITOP;
- s->read.head_left = 2;
- s->read.buf = NULL;
-
- // call completion routine.
- s->onPacketComplete(fd, s->read.head[0], 4, buf);
-
- return true;
- }
- else if(s->read.head[1] < 4){
- // invalid header.
- ShowWarning("_onRORecv: fd #%u invalid header - got packet 0x%04x, reported length < 4 - INVALID - disconnecting\n", fd, s->read.head[0]);
- return false;
- }
- else{
- // Data needed
- // next state -> waitdata!
- register netbuf buf = netbuffer_get( s->read.head[1] );
-
- NBUFL(buf, 0) = *((uint32*)&s->read.head[0]); // copy Opcode + length to netbuffer using MOVL
- buf->dataPos = 4;
- buf->dataLen = s->read.head[1];
- buf->next = NULL;
-
- // attach to session:
- s->read.buf = buf;
- s->read.state = NRS_WAITDATA;
-
- return true;
- }
-
- }//endif: szNeeded > 0 (length read complete?)
-
- break;
-
-
- case NRS_WAITDATA:
-
- if(szNeeded == 0){
- // Packet finished!
- // compltion.
- register netbuf buf = s->read.buf;
-
- // set initial state.
- s->read.state = NRS_WAITOP;
- s->read.head_left = 2;
- s->read.buf = NULL;
-
- // Call completion routine.
- s->onPacketComplete(fd, NBUFW(buf, 0), buf->dataLen, buf);
-
- return true;
- }else{
- // still data needed
- s->read.buf->dataPos += rLen;
-
- return true;
- }
- break;
-
-
- //
- default:
- ShowError("_onRORecv: fd #%u has unknown read.state (%d) [2] - disconnecting\n", fd, s->read.state);
- return false;
- break;
- }
-
-
- return false;
-}//end: _onRORecv()
-
-
-void network_send(int32 fd, netbuf buf){
- register SESSION *s = &g_Session[fd];
-
-#ifdef PARANOID_CHECKS
- if(fd >= MAXCONN){
- ShowError("network_send: tried to attach buffer to connection idientifer #%u which is out of bounds.\n", fd);
- _network_free_netbuf_async(buf);
- return;
- }
-#endif
-
-
- if(s->type == NST_FREE)
- return;
-
- // Check Max Outstanding buffers limit.
- if( (s->write.max_outstanding > 0) &&
- (s->write.n_outstanding >= s->write.max_outstanding) ){
-
- ShowWarning("network_send: fd #%u max Outstanding buffers exceeded. - disconnecting.\n", fd);
- network_disconnect(fd);
- //
- _network_free_netbuf_async(buf);
- return;
- }
-
-
- // Attach to the end:
- buf->next = NULL;
- if(s->write.buf_last != NULL){
- s->write.buf_last->next = buf;
- s->write.buf_last = buf;
-
- }else{
- // currently no buffer attached.
- s->write.buf = s->write.buf_last = buf;
-
- // register @ evdp for writable notification.
- evdp_writable_add(fd, &s->evdp_data); //
- }
-
-
- //
- s->write.n_outstanding++;
-
-}//end: network_send()
-
-
-void network_parser_set_ro(int32 fd,
- int16 *packetlentable,
- void (*onPacketCompleteProc)(int32 fd, uint16 op, uint16 len, netbuf buf)
- ){
- register SESSION *s = &g_Session[fd];
- register netbuf b, nb; // used for potential free attached buffers.
-
- if(s->type == NST_FREE)
- return;
-
- s->onPacketComplete = onPacketCompleteProc;
-
- s->onRecv = _onRORecv; // ..
- s->onSend = _onSend; // Using the normal generic netbuf based send function.
-
- s->netparser_data = packetlentable;
-
- // Initial State -> Need Packet OPCode.
- s->read.state = NRS_WAITOP;
- s->read.head_left = 2;
-
-
- // Detach (if..) all buffers.
- if(s->read.buf != NULL){
- _network_free_netbuf_async(s->read.buf); //
- s->read.buf = NULL;
- }
-
- if(s->write.buf != NULL){
- b = s->write.buf;
- while(1){
- nb = b->next;
-
- _network_free_netbuf_async(b);
-
- b = nb;
- }
-
- s->write.buf = NULL;
- s->write.buf_last = NULL;
- s->write.n_outstanding = 0;
- }
-
- // not changing any limits on outstanding ..
- //
-
-}//end: network_parser_set_ro()
generated by cgit v1.2.3-60-g2f50 (git 2.42.0) at 2024-06-28 20:52:55 +0000