Disable the port descriptor after UDP sends the message.

int get_osd_oob_list(struct osd_node onode, struct list_head *head){printf("\nEntering %s ", __func__);char message[4096];char oob_receive_buf[8192];int ret, m_type, valid_len;int failure_time = 0;int socket_descriptor;struct sockaddr_in sin;int sin_len;int port = OSD_RECEIVE_RESULT_PORT;int is_cur_osd = (onode.osd_no == current_osd_no) ? 1:0;CACHE_INFO("This time being processed osd_node is: no:%d and name %s and current restarted osdno:%d",\onode.osd_no, onode.osd_address, current_osd_no);CACHE_INFO("+++++++++In line%d and is_cur_osd :%d", __LINE__, is_cur_osd);if(onode.osd_no == current_osd_no)is_cur_osd = 1;CACHE_INFO("++++++++++++++++IN line%d and is_cur_osd :%d", __LINE__, is_cur_osd);memset(&sin, 0, sizeof(sin));sin.sin_family=AF_INET;sin.sin_addr.s_addr=htonl(INADDR_ANY);sin.sin_port=htons(port);sin_len=sizeof(sin);socket_descriptor=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP);bind(socket_descriptor,(struct sockaddr *)&sin,sizeof(sin));*(uint32_t *) &message[0] = OOB_SCAN;memcpy(&message[4], current_osd_ip, 20); send_osd_message(onode.osd_address, OSD_RECEIVE_CMD_PORT, message, 24);printf("\nIn %s and line:%d and read oob info cmd is sent to osd:%s", __func__, __LINE__, onode.osd_address);while(1){if(recvfrom(socket_descriptor,oob_receive_buf, sizeof(oob_receive_buf),0,(struct sockaddr *)&sin,&sin_len)){m_type = get_ntohl_be(&oob_receive_buf[0]);if(m_type!=OOB_DATA){CACHE_DEBUG("Invalid data because the data type is not OOB_DATA...");failure_time++;if(failure_time > 2)break;elsecontinue;}valid_len = get_ntohl_be(&oob_receive_buf[4]);if(!valid_len){CACHE_INFO("No more valid oob info on node %s and goto next step... ", onode.osd_address);break;}CACHE_INFO("Received oob info len:%d", valid_len);if(valid_len % OOB_LEN != 0)CACHE_DEBUG("Something is wrong with the oob data len...");ret = oob_data_process(oob_receive_buf+8, valid_len, head, is_cur_osd);}//if}close(socket_descriptor);printf("\nLeaving %s ...\n\n", __func__);return 0;}

 

Call the above function as follows.Close (socket_descriptor );The second time you enter the above function, the data cannot be normally received, and the thread hangs!

for(i=0; i< related_osd_table->osd_count; i++){printf("\nTo get osd oob list %d", i);ret = get_osd_oob_list(related_osd_table->osd[i], &osd_oobinfo_list[i]);}