socket与tcp连接（代码实例）

socket与tcp连接（代码实例）

[oracle@highgo ~]$ ps -ef |grep LOCAL
oracle   31665     1  0 10:10 ?        00:00:00 oracleorcl (LOCAL=NO)
oracle   31669     1  0 10:10 ?        00:00:00 oracleorcl (LOCAL=NO)
oracle   31673 31584  0 10:11 pts/0    00:00:00 grep --color=auto LOCAL
[oracle@highgo ~]$ 
[oracle@highgo ~]$ 
[oracle@highgo ~]$ cd /proc
[oracle@highgo proc]$ cd 31665 ------->>>>选择31665号操作系统进程
[oracle@highgo 31665]$ ls
attr       cgroup      comm             cwd      fd       io        map_files  mountinfo   net        oom_adj        pagemap      root       sessionid  stack  status   timers
autogroup  clear_refs  coredump_filter  environ  fdinfo   limits    maps       mounts      ns         oom_score      personality  sched      setgroups  stat   syscall  uid_map
auxv       cmdline     cpuset           exe      gid_map  loginuid  mem        mountstats  numa_maps  oom_score_adj  projid_map   schedstat  smaps      statm  task     wchan
[oracle@highgo 31665]$ cd fd
[oracle@highgo fd]$ ls -lrt
total 0
lr-x------ 1 oracle oinstall 64 Feb 25 10:11 8 -> /u01/app/oracle/product/11.2.0/db_home/rdbms/mesg/oraus.msb
lr-x------ 1 oracle oinstall 64 Feb 25 10:11 7 -> /u01/app/oracle/product/11.2.0/db_home/rdbms/mesg/orazhs.msb
lr-x------ 1 oracle oinstall 64 Feb 25 10:11 6 -> /dev/zero
lr-x------ 1 oracle oinstall 64 Feb 25 10:11 5 -> /proc/31665/fd
lr-x------ 1 oracle oinstall 64 Feb 25 10:11 4 -> /u01/app/oracle/product/11.2.0/db_home/rdbms/mesg/oraus.msb
lr-x------ 1 oracle oinstall 64 Feb 25 10:11 3 -> /dev/null
lrwx------ 1 oracle oinstall 64 Feb 25 10:11 257 -> /data/ORCL/datafile/o1_mf_sysaux_f5xj120r_.dbf
lrwx------ 1 oracle oinstall 64 Feb 25 10:11 256 -> /data/ORCL/datafile/o1_mf_system_f5xj11z4_.dbf
l-wx------ 1 oracle oinstall 64 Feb 25 10:11 2 -> /dev/null
lrwx------ 1 oracle oinstall 64 Feb 25 10:11 14 -> socket:[220745]----->>>注意中括号内的数字
l-wx------ 1 oracle oinstall 64 Feb 25 10:11 1 -> /dev/null
lr-x------ 1 oracle oinstall 64 Feb 25 10:11 0 -> /dev/null
[oracle@highgo fd]$ cat /proc/net/tcp
  sl  local_address rem_address   st tx_queue rx_queue tr tm->when retrnsmt   uid  timeout inode                                                     
   0: 00000000:006F 00000000:0000 0A 00000000:00000000 00:00000000 00000000     0        0 18856 1 ffff881ffc8d0000 100 0 0 10 0                     
   1: 00000000:0016 00000000:0000 0A 00000000:00000000 00:00000000 00000000     0        0 14792 1 ffff880c34f68000 100 0 0 10 0                     
   2: 0100007F:0277 00000000:0000 0A 00000000:00000000 00:00000000 00000000     0        0 16928 1 ffff880c35af8000 100 0 0 10 0                     
   3: 0100007F:0019 00000000:0000 0A 00000000:00000000 00:00000000 00000000     0        0 22926 1 ffff880c32ae8000 100 0 0 10 0                     
   4: 6A64A8C0:BDA3 6A64A8C0:05F1 01 00000000:00000000 00:00000000 00000000  1200        0 13282 1 ffff880c34300000 20 4 32 10 -1                    
   5: 6A64A8C0:0016 AB50A8C0:FF54 01 00000034:00000000 01:00000017 00000000     0        0 216248 4 ffff880c35fd8000 24 4 31 10 42                   
[oracle@highgo fd]$ cat /proc/net/tcp6
  sl  local_address                         remote_address                        st tx_queue rx_queue tr tm->when retrnsmt   uid  timeout inode
   0: 00000000000000000000000000000000:006F 00000000000000000000000000000000:0000 0A 00000000:00000000 00:00000000 00000000     0        0 18855 1 ffff881ff4a28000 100 0 0 10 0
   1: 00000000000000000000000000000000:4231 00000000000000000000000000000000:0000 0A 00000000:00000000 00:00000000 00000000  1200        0 13286 1 ffff880c32fc0880 100 0 0 10 0
   2: 00000000000000000000000000000000:05F1 00000000000000000000000000000000:0000 0A 00000000:00000000 00:00000000 00000000  1200        0 25465 1 ffff880c35b60000 100 0 0 10 0
   3: 00000000000000000000000000000000:0016 00000000000000000000000000000000:0000 0A 00000000:00000000 00:00000000 00000000     0        0 14794 1 ffff880c34f50000 100 0 0 10 0
   4: 00000000000000000000000001000000:0277 00000000000000000000000000000000:0000 0A 00000000:00000000 00:00000000 00000000     0        0 16927 1 ffff880c35af0000 100 0 0 10 0
   5: 00000000000000000000000001000000:0019 00000000000000000000000000000000:0000 0A 00000000:00000000 00:00000000 00000000     0        0 22927 1 ffff880c326d0000 100 0 0 10 0
   6: 0000000000000000FFFF00006A64A8C0:05F1 0000000000000000FFFF00006A64A8C0:BDA3 01 00000000:00000000 02:0007B0F7 00000000  1200        0 25516 2 ffff880c32fc0000 20 5 31 10 -1
   7: 0000000000000000FFFF00006A64A8C0:05F1 0000000000000000FFFF0000AB50A8C0:E858 01 00000000:00000000 02:000ACA90 00000000  1200        0 219660 2 ffff880c19b19100 21 4 33 10 -1
   8: 0000000000000000FFFF00006A64A8C0:05F1 0000000000000000FFFF0000AB50A8C0:E84A 01 00000000:00000000 02:000ACA90 00000000  1200        0 220745 2 ffff880c333e1100 21 4 29 10 -1
                        ----socket四元组：本地ip：本地port 远程ip：远程port------
						  00006A64A8C0转换字节序并转换为10进制为192.168.100.106
						               05F1转换为10进制为1521
						                                            AB50A8C0转换字节序并转换为10进制为192.168.80.171
																	        E84A转换为10进制为59466
																			在windows客户端上，执行如下命令可以验证windows上的59466端口：
																			D:\app\Administrator\product\11.2.0>netstat -ano | findstr 59466
                                                                            TCP    192.168.80.171:59466   192.168.100.106:1521   ESTABLISHED     41464
                                                                            D:\app\Administrator\product\11.2.0>