Signed-off-by: Marek Lindner lindner_marek@yahoo.de --- README | 1 + functions.h | 1 + man/batctl.8 | 40 +++++++++++++++++++++++++++++++--------- tcpdump.c | 11 ++++++++++- 4 files changed, 43 insertions(+), 10 deletions(-)

diff --git a/README b/README index 0fe192f..24dc4cf 100644 --- a/README +++ b/README @@ -88,6 +88,7 @@ tcpdump layer 2 and/or layer 3 traffic on the given interface

Usage: batctl tcpdump [options] interface [interface] options: + -c compat filter - only display packets matching own compat version (14) -h print this help -n don't convert addresses to bat-host names -p dump specific packet type diff --git a/functions.h b/functions.h index ea953dd..fe03dc0 100644 --- a/functions.h +++ b/functions.h @@ -48,4 +48,5 @@ enum { USE_READ_BUFF = 0x10, SILENCE_ERRORS = 0x20, NO_OLD_ORIGS = 0x40, + COMPAT_FILTER = 0x80, }; diff --git a/man/batctl.8 b/man/batctl.8 index 4f2e1c6..c788f2d 100644 --- a/man/batctl.8 +++ b/man/batctl.8 @@ -175,15 +175,37 @@ address. batctl will send 3 packets to each host and display the response time. If "-n" is given batctl will not replace the MAC addresses with bat-host names in the output. .br -.IP "\fBtcpdump\fP|\fBtd\fP [\fB-p filter\fP][\fB-n\fP] \fBinterface ...\fP" -batctl will display all packets that are seen on the given -interface(s). The "-p" options allows the filtering of certain packet -types: 1 - batman ogm packets, 2 - batman icmp packets, 4 - unicast -packets, 8 - broadcast packets, 16 - vis packets, and 32 - none batman -packets. These numbers can be added to filter more than one packet -type, e.g. use "-p 3" to display batman ogm packets and batman icmp -packets only. If "-n" is given batctl will not replace the MAC -addresses with bat-host names in the output. +.IP "\fBtcpdump\fP|\fBtd\fP [\fB-c\fP][\fB-n\fP][\fB-p filter\fP][\fB-x filter\fP] \fBinterface ...\fP" +batctl will display all packets that are seen on the given interface(s). A variety of options to filter the output +are available: To only print packets that match the compatibility number of batctl specify the "-c" (compat filter) +option. If "-n" is given batctl will not replace the MAC addresses with bat-host names in the output. To filter +the shown packet types you can either use "-p" (dump only specified packet types) or "-x" (dump all packet types +except specified). The following packet types are available: +.RS 17 +1 - batman ogm packets +.RE +.RS 17 +2 - batman icmp packets +.RE +.RS 17 +4 - batman unicast packets +.RE +.RS 17 +8 - batman broadcast packets +.RE +.RS 16 +16 - batman vis packets +.RE +.RS 16 +32 - batman fragmented packets +.RE +.RS 16 +64 - batman tt / roaming packets +.RE +.RS 15 +128 - non batman packets +.RE +Example: batctl td <interface> -p 129 -> only display batman ogm packets and non batman packets .br .IP "\fBbisect\fP [\fB-l MAC\fP][\fB-t MAC\fP][\fB-r MAC\fP][\fB-s min\fP [\fB- max\fP]][\fB-o MAC\fP][\fB-n\fP] \fBlogfile1\fP [\fBlogfile2\fP ... \fBlogfileN\fP]" Analyses the logfiles to build a small internal database of all sent diff --git a/tcpdump.c b/tcpdump.c index 72c9cf1..6672cf1 100644 --- a/tcpdump.c +++ b/tcpdump.c @@ -61,6 +61,7 @@ static void tcpdump_usage(void) { printf("Usage: batctl tcpdump [options] interface [interface]\n"); printf("options:\n"); + printf(" \t -c compat filter - only display packets matching own compat version (%i)\n", COMPAT_VERSION); printf(" \t -h print this help\n"); printf(" \t -n don't convert addresses to bat-host names\n"); printf(" \t -p dump specific packet type\n"); @@ -491,6 +492,10 @@ static void parse_eth_hdr(unsigned char *packet_buff, ssize_t buff_len, int read case ETH_P_BATMAN: batman_ogm_packet = (struct batman_ogm_packet *)(packet_buff + ETH_HLEN);

+ if ((read_opt & COMPAT_FILTER) && + (batman_ogm_packet->header.version != COMPAT_VERSION)) + return; + switch (batman_ogm_packet->header.packet_type) { case BAT_IV_OGM: if (dump_level & DUMP_TYPE_BATOGM) @@ -639,8 +644,12 @@ int tcpdump(int argc, char **argv)

dump_level = dump_level_all;

- while ((optchar = getopt(argc, argv, "hnp:x:")) != -1) { + while ((optchar = getopt(argc, argv, "chnp:x:")) != -1) { switch (optchar) { + case 'c': + read_opt |= COMPAT_FILTER; + found_args += 1; + break; case 'h': tcpdump_usage(); return EXIT_SUCCESS;