ref: 28f4567ba615c4036c079021392825757ef2a008
dir: /sys/src/cmd/ip/snoopy/dat.h/
typedef struct Field Field; typedef struct Filter Filter; typedef struct Msg Msg; typedef struct Mux Mux; typedef struct Proto Proto; #define NetS(x) ((((uchar*)x)[0]<<8) | ((uchar*)x)[1]) #define Net3(x) ((((uchar*)x)[0]<<16) | (((uchar*)x)[1]<<8) | ((uchar*)x)[2]) #define NetL(x) ((((uchar*)x)[0]<<24) | (((uchar*)x)[1]<<16) | (((uchar*)x)[2]<<8) | ((uchar*)x)[3]) /* * one per protocol module */ struct Proto { char* name; void (*compile)(Filter*); int (*filter)(Filter*, Msg*); int (*seprint)(Msg*); Mux* mux; char* valfmt; Field* field; int (*framer)(int, uchar*, int); }; extern Proto *protos[]; /* * one per protocol module, pointed to by Proto.mux */ struct Mux { char* name; ulong val; Proto* pr; }; /* * a field defining a comparison filter */ struct Field { char* name; int ftype; int subop; char* help; }; /* * the status of the current message walk */ struct Msg { uchar *ps; /* packet ptr */ uchar *pe; /* packet end */ char *p; /* buffer start */ char *e; /* buffer end */ int needroot; /* pr is root, need to see in expression */ Proto *pr; /* current/next protocol */ }; enum { Fnum, /* just a number */ Fether, /* ethernet address */ Fv4ip, /* v4 ip address */ Fv6ip, /* v6 ip address */ Fba, /* byte array */ }; /* * a node in the filter tree */ struct Filter { int op; /* token type */ char *s; /* string */ Filter *l; Filter *r; Proto *pr; /* next protocol; /* protocol specific */ int subop; ulong param; union { ulong ulv; vlong vlv; uchar a[32]; }; }; extern void yyinit(char*); extern int yyparse(void); extern Filter* newfilter(void); extern void compile_cmp(char*, Filter*, Field*); extern void demux(Mux*, ulong, ulong, Msg*, Proto*); extern int defaultframer(int, uchar*, int); extern int Mflag; extern int Nflag; extern int dflag; extern int Cflag; typedef Filter *Filterptr; #define YYSTYPE Filterptr extern Filter *filter;