diff options
| -rw-r--r-- | trafgen.8 | 14 |
1 files changed, 8 insertions, 6 deletions
@@ -243,7 +243,7 @@ this when running this with trafgen in combination with \-V): There are a couple of helper functions in trafgen's language to make life easier to write configurations: .PP -i) Fill with garbage functions: +.B i) Fill with garbage functions: .PP byte fill function: fill(<content>, <times>): fill(0xca, 128) compile-time random: rnd(<times>): rnd(128), rnd() @@ -253,7 +253,7 @@ i) Fill with garbage functions: runtime counter (1byte): dinc(<min-val>, <max-val>, <increment>) ddec(<min-val>, <max-val>, <decrement>) .PP -ii) Checksum helper functions (packet offsets start with 0): +.B ii) Checksum helper functions (packet offsets start with 0): .PP IP/ICMP checksum: csumip/csumicmp(<off-from>, <off-to>) UDP checksum: csumudp(<off-iphdr>, <off-udpdr>) @@ -261,7 +261,7 @@ ii) Checksum helper functions (packet offsets start with 0): UDP checksum (IPv6): csumudp6(<off-ip6hdr>, <off-udpdr>) TCP checksum (IPv6): csumtcp6(<off-ip6hdr>, <off-tcphdr>) .PP -iii) Multibyte functions, compile-time expression evaluation: +.B iii) Multibyte functions, compile-time expression evaluation: .PP const8(<content>), c8(<content>), const16(<content>), c16(<content>), const32(<content>), c32(<content>), const64(<content>), c64(<content>) @@ -271,14 +271,16 @@ configuration, e.g. const16(0xaa) will result in ''00 aa''. Within c*() functions, it is possible to do some arithmetics: -,+,*,/,%,&,|,<<,>>,^ E.g. const16((((1<<8)+0x32)|0b110)*2) will be evaluated to ''02 6c''. .PP -iv) Protocol header functions: +.B iv) Protocol header functions: +.in +4 The protocol header functions allow to fill protocol header fields by using following generic syntax: -.in +8 .sp +.in +4 <proto>(<field>=<value>,<field2>=<value2>,...,<field3>,...) +.in -4 .sp -.in -8 +.in -4 .in +4 If a field is not specified, then a default value will be used (usually 0). Protocol fields might be set in any order. However, the offset of the fields in |