2.3.2/src/vde_switch/plugins/dump.c

   1 #define _GNU_SOURCE
   2
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5
   6 #include <config.h>
   7 #include <vde.h>
   8 #include <vdecommon.h>
   9
  10 #include <vdeplugin.h>
  11
  12
  13 static int testevent(struct dbgcl *tag,void *arg,va_list v);
  14 static int dump(char *arg);
  15
  16 struct plugin vde_plugin_data={
  17         .name="dump",
  18         .help="dump packets",
  19 };
  20
  21 static struct comlist cl[]={
  22         {"dump","============","DUMP Packets",NULL,NOARG},
  23         {"dump/active","0/1","start dumping data",dump,STRARG},
  24 };
  25
  26 #define D_DUMP 0100
  27 static struct dbgcl dl[]= {
  28          {"dump/packetin","dump incoming packet",D_DUMP|D_IN},
  29          {"dump/packetout","dump outgoing packet",D_DUMP|D_OUT},
  30 };
  31
  32 static int dump(char *arg)
  33 {
  34         int active=atoi(arg);
  35         int rv;
  36         if (active)
  37                 rv=eventadd(testevent,"packet",dl);
  38         else
  39                 rv=eventdel(testevent,"packet",dl);
  40         return 0;
  41 }
  42
  43 static int testevent(struct dbgcl *event,void *arg,va_list v)
  44 {
  45         struct dbgcl *this=arg;
  46         switch (event->tag) {
  47                 case D_PACKET|D_OUT:
  48                         this++;
  49                 case D_PACKET|D_IN:
  50                         {
  51                                 int port=va_arg(v,int);
  52                                 unsigned char *buf=va_arg(v,unsigned char *);
  53                                 int len=va_arg(v,int);
  54                                 char *pktdump;
  55                                 size_t dumplen;
  56                                 FILE *out=open_memstream(&pktdump,&dumplen);
  57                                 if (out) {
  58                                         int i;
  59                                         fprintf(out,"Pkt: Port %04d len=%04d ",
  60                                                         port,
  61                                                         len);
  62                                         for (i=0;i<len;i++)
  63                                                 fprintf(out,"%02x ",buf[i]);
  64                                         fclose(out);
  65                                         DBGOUT(this, "%s",pktdump);
  66                                         free(pktdump);
  67                                 }
  68                         }
  69         }
  70         return 0;
  71 }
  72
  73         static void
  74         __attribute__ ((constructor))
  75 init (void)
  76 {
  77         ADDCL(cl);
  78         ADDDBGCL(dl);
  79 }
  80
  81         static void
  82         __attribute__ ((destructor))
  83 fini (void)
  84 {
  85         DELCL(cl);
  86         DELDBGCL(dl);
  87 }