vde-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         if (active)
  36                 eventadd(testevent,"packet",dl);
  37         else
  38                 eventdel(testevent,"packet",dl);
  39         return 0;
  40 }
  41
  42 static int testevent(struct dbgcl *event,void *arg,va_list v)
  43 {
  44         struct dbgcl *this=arg;
  45         switch (event->tag) {
  46                 case D_PACKET|D_OUT:
  47                         this++;
  48                 case D_PACKET|D_IN:
  49                         {
  50                                 int port=va_arg(v,int);
  51                                 unsigned char *buf=va_arg(v,unsigned char *);
  52                                 int len=va_arg(v,int);
  53                                 char *pktdump;
  54                                 size_t dumplen;
  55                                 FILE *out=open_memstream(&pktdump,&dumplen);
  56                                 if (out) {
  57                                         int i;
  58                                         fprintf(out,"Pkt: Port %04d len=%04d ",
  59                                                         port,
  60                                                         len);
  61                                         for (i=0;i<len;i++)
  62                                                 fprintf(out,"%02x ",buf[i]);
  63                                         fclose(out);
  64                                         DBGOUT(this, "%s",pktdump);
  65                                         free(pktdump);
  66                                 }
  67                         }
  68         }
  69         return 0;
  70 }
  71
  72         static void
  73         __attribute__ ((constructor))
  74 init (void)
  75 {
  76         ADDCL(cl);
  77         ADDDBGCL(dl);
  78 }
  79
  80         static void
  81         __attribute__ ((destructor))
  82 fini (void)
  83 {
  84         DELCL(cl);
  85         DELDBGCL(dl);
  86 }