//这个函数打开TCP端口SON_PORT, 等待来自本地SIP进程的进入连接.
//在本地SIP进程连接之后, 这个函数持续接收来自SIP进程的sendpkt_arg_t结构, 并将报文发送到重叠网络中的下一跳.
//如果下一跳的节点ID为BROADCAST_NODEID, 报文应发送到所有邻居节点.
void waitSIP() {
int listenfd, connfd;
int option = 1;
struct sockaddr_in caddr, saddr;
if ((listenfd = socket(AF_INET, SOCK_STREAM, 0)) < 0){
printf("Listen is Wrong !!!!!!!\n");
exit(2);
}
if (setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, &option, sizeof(option)) < 0){
printf("Error!!!!!\n");
exit(2);
}
memset(&saddr, 0, sizeof(saddr));
saddr.sin_family = AF_INET;
saddr.sin_addr.s_addr = htonl(INADDR_ANY);
saddr.sin_port = htons(SON_PORT);
bind(listenfd, (struct sockaddr*)&saddr, sizeof(saddr));
listen(listenfd, 2);
socklen_t len = sizeof(caddr);
connfd = accept(listenfd, (struct sockaddr*)&caddr, &len);
close(listenfd);
sip_conn = connfd;
sip_pkt_t* pkt = (sip_pkt_t *)malloc(sizeof(sip_pkt_t));
int *nextNode = (int *)malloc(sizeof(int));
while(1){
if(getpktToSend(pkt, nextNode,sip_conn) > 0){
if(*nextNode == BROADCAST_NODEID){
int j = 0;
while(j < neighNum){
sendpkt(pkt, nt[j].conn);
j ++;
}
}
else{
int j = 0;
while(j < neighNum){
if(*nextNode == nt[j].nodeID){
sendpkt(pkt, nt[j].conn);
j ++;
}
}
}
}
}
}
//这个函数打开TCP端口SON_PORT, 等待来自本地SIP进程的进入连接.
//在本地SIP进程连接之后, 这个函数持续接收来自SIP进程的sendpkt_arg_t结构, 并将报文发送到重叠网络中的下一跳.
//如果下一跳的节点ID为BROADCAST_NODEID, 报文应发送到所有邻居节点.
void waitSIP() {
struct sockaddr_in servaddr, cliaddr;
socklen_t cliaddr_len;
int listenfd;
listenfd = socket(AF_INET, SOCK_STREAM, 0);
bzero(&servaddr, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
servaddr.sin_port = htons(SON_PORT);
bind(listenfd, (struct sockaddr *)&servaddr, sizeof(servaddr));
listen(listenfd, 20);
sip_conn = accept(listenfd, (struct sockaddr *)&cliaddr, &cliaddr_len);
//recv pkt from sip and send
sip_pkt_t pkt;
int nextNode, conn;
while(1){
if(getpktToSend(&pkt,&nextNode,sip_conn) == 1){
if (pkt.header.type == SIP){
if((conn = getConnByID(nextNode)) >= 0){
if(sendpkt(&pkt,conn) < 0)
printf("Error in send pkt to Nbr\n");
} else {
printf("Wrong Node id nextNode = %d\n",nextNode);
}
} else if (pkt.header.type == ROUTE_UPDATE){
int nbr_num = topology_getNbrNum();
int i;
for (i = 0; i < nbr_num; i++){
if (nt[i].conn >= 0 && sendpkt(&pkt, nt[i].conn) < 0){
printf("Error in send route update pkt to Nbr\n");
}
}
}
}
}
printf("Error in getpktToSend\n");
}
//这个函数打开TCP端口SON_PORT, 等待来自本地SIP进程的进入连接.
//在本地SIP进程连接之后, 这个函数持续接收来自SIP进程的sendpkt_arg_t结构, 并将报文发送到重叠网络中的下一跳.
//如果下一跳的节点ID为BROADCAST_NODEID, 报文应发送到所有邻居节点.
void waitSIP() {
int sockfd;
struct sockaddr_in cli_addr, serv_addr;
socklen_t clilen;
if((sockfd = socket(AF_INET, SOCK_STREAM, 0))<0) {
perror("Error create socket\n");
exit(-1);
}
const int one = 1; //port可以立即重新使用
setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
serv_addr.sin_family=AF_INET;
serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
serv_addr.sin_port = htons(SON_PORT);
if(bind(sockfd, (struct sockaddr*)&serv_addr, sizeof(serv_addr))<0) {
perror("Error bind\n");
exit(-1);
}
listen(sockfd, MAX_NODE_NUM);
clilen = sizeof(cli_addr);
while(1) {
sip_conn = accept(sockfd, (struct sockaddr*)&cli_addr, &clilen);
sip_pkt_t* sip_pkt;
int next;
while(1) {
sip_pkt = (sip_pkt_t*)malloc(sizeof(sip_pkt_t));
memset(sip_pkt, 0, sizeof(sip_pkt_t));
if(getpktToSend(sip_pkt, &next, sip_conn)>0) {
if(next == BROADCAST_NODEID) {
int nbrnum = topology_getNbrNum();
int i = 0;
for(i=0; i<nbrnum; i++) {
//if(nt[i].conn > 0) {
sendpkt(sip_pkt, nt[i].conn);
//}
//else {
//printf("sendpkt conn<0, id: %d\n", nt[i].nodeID);
//}
}
}
else {
if(sip_pkt->header.type == SIP) {
printf("Receive stcp packet!\n");
}
int nbrnum = topology_getNbrNum();
int i = 0;
for(i=0; i<nbrnum; i++) {
if(next == nt[i].nodeID) {
printf("send message to node %d\n", next);
sendpkt(sip_pkt, nt[i].conn);
break;
}
}
}
}
else {
free(sip_pkt);
close(sip_conn);
break;
}
free(sip_pkt);
}
}
return;
}
//这个函数打开TCP端口SON_PORT, 等待来自本地SIP进程的进入连接.
//在本地SIP进程连接之后, 这个函数持续接收来自SIP进程的sendpkt_arg_t结构, 并将报文发送到重叠网络中的下一跳.
//如果下一跳的节点ID为BROADCAST_NODEID, 报文应发送到所有邻居节点.
void waitSIP() {
//你需要编写这里的代码.
int nbrNum = topology_getNbrNum();
int listenfd=0;
struct sockaddr_in servaddr,cliaddr;
socklen_t clilen;
if ((listenfd=socket(AF_INET, SOCK_STREAM,0))<0)
{
puts("create socket error!");
}
servaddr.sin_family=AF_INET;
servaddr.sin_addr.s_addr=htonl(INADDR_ANY);
servaddr.sin_port=htons(SON_PORT);
const int on = 1;
setsockopt(listenfd,SOL_SOCKET,SO_REUSEADDR,&on,sizeof(on));
bind(listenfd,(struct sockaddr *)&servaddr, sizeof(servaddr));
puts("SON Wait For SIP Server Init Success!");
listen(listenfd,1);
while(1){
sip_conn=accept(listenfd,(struct sockaddr *)&cliaddr,&clilen);
puts("Accept SIP Process!");
int nextNode=0;
sip_pkt_t* recv_seg=malloc(sizeof(sip_pkt_t));
memset(recv_seg,0,sizeof(sip_pkt_t));
while (1){
if (getpktToSend(recv_seg,&nextNode,sip_conn)!=1)
//continue;
break;
if (nextNode==BROADCAST_NODEID){
//char *flags=malloc(nbrNum);
//memset(flags,0,nbrNum);
for (int i=0;i<nbrNum;i++)
{
if (sendpkt(recv_seg,nt[i].conn)==-1) {
//flags[i]=1;
}
}/*
for (int i=0;i<nbrNum;i++) {
if (flags[i]==1) {
forwardpktToSIP(build_failpkt(nt[i].nodeID),sip_conn);
}
}
free(flags);*/
}
else{
for (int i=0;i<nbrNum;i++)
{
if (nt[i].nodeID==nextNode)
{
if (sendpkt(recv_seg,nt[i].conn)==-1) {
//forwardpktToSIP(build_failpkt(nt[i].nodeID),sip_conn);
}
break;
}
}
}
}
printf("####SIP stop!! listening for next SIP\n");
close(sip_conn);
}
}
//这个函数打开TCP端口SON_PORT, 等待来自本地SIP进程的进入连接.
//在本地SIP进程连接之后, 这个函数持续接收来自SIP进程的sendpkt_arg_t结构, 并将报文发送到重叠网络中的下一跳.
//如果下一跳的节点ID为BROADCAST_NODEID, 报文应发送到所有邻居节点.
void waitSIP() {
int listenfd;
socklen_t clilen;
clilen = sizeof(struct sockaddr_in);
struct sockaddr_in cliaddr, servaddr;
memset(&cliaddr, 0, sizeof(cliaddr));
memset(&servaddr, 0, sizeof(servaddr));
listenfd = socket(AF_INET, SOCK_STREAM, 0);
servaddr.sin_family = AF_INET;
// servaddr.sin_addr.s_addr = INADDR_ANY;
inet_aton("127.0.0.1", &servaddr.sin_addr);
servaddr.sin_port = htons(SON_PORT);
const int on = 1;
setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(const int));
bind(listenfd, (struct sockaddr *)&servaddr, sizeof(servaddr));
listen(listenfd, MAX_NODE_NUM);
while (1) {
// wait for sip connection
memset(&cliaddr, 0, sizeof(struct sockaddr));
sip_conn = accept(listenfd, (struct sockaddr *)&cliaddr, &clilen);
if (sip_conn == -1) {
print_pos();
printf("ERROR: accept sip connection failed\n");
sleep(1);
continue;
}
/* recv from sip and son forward start here */
// print_pos();
// printf("MSG: sip access ok, sip_conn = %d, begin to convey sip->son\n", sip_conn);
sip_pkt_t tmp;
int nNode, result;
while (1){
memset(&tmp, 0, sizeof(sip_pkt_t));
result = getpktToSend(&tmp, &nNode, sip_conn);
if(result == -1) {
print_pos();
printf("ERROR: get pkt from sip failed\nMSG: Break loop wait another sip connect\n");
sleep(1);
break;
}
// print_pos();
// printf("MSG: get sip_pkt_t to send ok, send to nbr...\n");
// if broad cast, send to every neighbor
if (nNode == BROADCAST_NODEID){
int ct = topology_getNbrNum();
int i;
for (i = 0; i < ct; i++){
// print_pos();
// printf("MSG: broadcast send to socket %d\n", nt[i].conn);
result = sendpkt(&tmp, nt[i].conn);
if (result == -1){
print_pos();
printf("ERROR: send pkt to broadcast failed\n");
continue;
}
}
// printf("MSG: send sip_pkt_t to broadcast ok\n");
} else{ // others, send to next hop
int destConn = getConnByNode(nNode);
if (destConn == -1) {
print_pos();
printf("ERROR: conn not set up\n");
}
result = sendpkt(&tmp, destConn);
if (result == -1){
printf("ERROR: send pkt to next node failed\n");
continue;
}
// printf("MSG: send sip_pkt_t to nbr ok, socket=%d\n", destConn);
}
}
}
}
//这个函数打开TCP端口SON_PORT, 等待来自本地SIP进程的进入连接.
//在本地SIP进程连接之后, 这个函数持续接收来自SIP进程的sendpkt_arg_t结构, 并将报文发送到重叠网络中的下一跳.
//如果下一跳的节点ID为BROADCAST_NODEID, 报文应发送到所有邻居节点.
void waitSIP() {
socklen_t clilen;
int listenfd;
//char buf[MAXLINE];
struct sockaddr_in cliaddr,servaddr;
listenfd = socket(AF_INET,SOCK_STREAM,0);
memset(&servaddr, 0, sizeof(struct sockaddr_in));
servaddr.sin_family=AF_INET;
servaddr.sin_addr.s_addr=htonl(INADDR_ANY);
servaddr.sin_port=htons(SON_PORT);
bind(listenfd,(struct sockaddr *)&servaddr,sizeof(servaddr));
listen(listenfd,MAX_NODE_NUM);//开始监听
clilen = sizeof(cliaddr);
int connfd = accept(listenfd,(struct sockaddr *)&cliaddr,&clilen);
sip_conn = connfd;
printf("IP linked\n");
while(1)
{
sip_pkt_t* pkt = (sip_pkt_t*)malloc(sizeof(sip_pkt_t));
memset(pkt,0,sizeof(sip_pkt_t));
int nextNode = 0;
// 如果成功接收sendpkt_arg_t结构, 返回1, 否则返回-1.
if(getpktToSend(pkt,&nextNode,sip_conn)==1)
{
printf("in son ready to send:%d\n",pkt->header.src_nodeID);
if(nextNode == BROADCAST_NODEID)
{
int i = 0;
for(i = 0 ;i <topology_getNbrNum();i++)
{
printf("send to everyone!\n");
if(nt[i].conn == -1)
{
printf("%d sleep no more send to him\n",nt[i].nodeID);
continue;
}
if(sendpkt(pkt, nt[i].conn) == 1)
{
printf("send to nextnode sucess! %d\n",nt[i].conn);
}
else
{
printf("send fail %d",i);
}
}
}
else
{
int i = 0;
for(i = 0 ;i <topology_getNbrNum();i++)
{
if(nextNode == nt[i].nodeID)
{
break;
}
}
if(i == topology_getNbrNum())
{
printf("cant find next node!\n");
exit(0);
}
if(nt[i].conn == -1)
{
printf("%d sleep no more send to him\n",nt[i].nodeID);
continue;
}
// 如果报文发送成功, 返回1, 否则返回-1.
if(sendpkt(pkt, nt[i].conn) == 1)
{
printf("send to nextnode sucess!\n");
}
else
{
printf("send to nextnode fail\n");
}
}
}
else
{
printf("SIP stop!!!!!!!!!!!!!!!\n");
break;
}
}
}