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2016-09-29build: configure: fix checking CC containing -i optionYousong Zhou1-5/+12
On CentOS 6, the configure process may hang there reading stdin if the we have CC='gcc -isystem'. This can be reproduced with bash -c 'which gcc -i' Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-09-23man: trafgen: Fix link to Jesper's exampleVadim Kochan1-1/+1
The link: http://thread.gmane.org/gmane.linux.network/257155 does not work anymore, so replace it with another one at: https://marc.info/?l=linux-netdev&m=135903630614184 Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Suggested-by: Tobias Klauser <tklauser@distanz.ch> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-09-21trafgen: man: Simplify example of Jasper's UDP packet by proto functionsVadim Kochan1-3/+3
Removed unneeded fields which are calcuated by default: <udp.len> <ipv4.len> <ipv4.proto> Fixed <ipv4.id> field by changing drnd(2) -> drnd() as proto field <drnd> function does not support bytes length value but randomizes specified field by its length. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-09-21trafgen: man: Add description for 'dinc' and 'drnd' field functionsVadim Kochan1-0/+43
Add explanation about 'drnd' and 'dinc' functions which might be used for proto field functions. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-09-21trafgen: parser: Add 'drnd()' function for proto fieldsVadim Kochan1-0/+9
Add syntax for specify dynamic random function for proto field: drnd() | drnd(min, max) EXAMPLE: { udp(sport=drnd()) } { udp(sport=drnd(1000, 2000)) } Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-09-21trafgen: parser: Add support of 'dinc' function for proto fieldsVadim Kochan1-0/+53
Add 'dinc()' function in 'field_expr' rules to be used for dynamically incrementing of any specified field: SYNTAX := dinc() | dinc(step) | dinc(min, max) | dinc(min, max, step) EXAMPLES: { udp(sport=dinc() } { udp(sport=dinc(1) } { udp(sport=dinc(100, 125, 5) } Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-09-21trafgen: parser: Unify proto field value parsingVadim Kochan3-147/+218
Changed parsing logic of field value expression to be more generic. Such approach will allow to easy extend field value expression to support dynamic field functions. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-09-21trafgen: tcp: Update csum at runtime if it neededVadim Kochan2-5/+17
Update TCP checksum field if any TCP of fields was changed. Use same checksum update function on 'packet_finish' and 'header update'. Set 'is_csum_valid = false' if lower IPv4/IPv6 pseudo header was changed. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-09-21trafgen: udp: Update csum at runtime if neededVadim Kochan2-8/+47
Update UDP csum field at runtime if: 1) UDP field was changed. 2) IPv4/6 source/destination addresses were changed (which is a part of UDP pseudo header), this is handled by IPv4/6 protocols. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-09-21trafgen: proto: Introduce proto_upper_header() functionVadim Kochan2-0/+13
Added proto_upper_header() function to fetch upper proto header. It will be used by IPv4/IPv6 proto header to notify UDP/TCP proto headers to invalidate L4 csum when L3 pseudo header field was changed. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-09-21trafgen: proto: Improve to find lower header by indexVadim Kochan2-14/+12
Extended struct proto_hdr with 'index' field which is used for faster lookup of lower header without doing a loop. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-09-21trafgen: icmpv6: Update csum at runtime if neededVadim Kochan1-13/+19
Use same function to calculate csum for packet_update and for packet_finish events. Allow update csum if one of the ICMPv6 fields was changed. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-09-21trafgen: icmpv4: Update csum at runtime if neededVadim Kochan1-4/+16
Update csum if any of the ICMPv4 field was changed. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-09-21trafgen: ipv4: Update csum at runtime if neededVadim Kochan2-6/+28
Handle 'field_changed' callback to check if IPv4 csum is needed to be recalculated, if so - update it on 'packet_update' event. Added 'is_csum_valid' to proto_hdr struct to check if csum needs to be updated. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-09-21trafgen: proto: Randomize proto field at runtimeVadim Kochan2-0/+28
Add dynamic proto field function which can generate random value in specified range (default 0 - MAX_UINT32). Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-09-21trafgen: proto: Increment proto field at runtimeVadim Kochan2-0/+65
Implement incrementing of proto field at runtime with min & max parameters, by default if the 'min' parameter is not specified then original value is used. For fields which len is greater than 4 - last 4 bytes are incremented as 4 byte value (this trick is used to increment MAC/IPv6 addresses). Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-09-21trafgen: proto: Update field value at runtimeVadim Kochan4-0/+63
Add basic infrastructure for update proto field value at runtime by dynamic field function. Extended 'struct packet_dyn' with proto fields which has dynamically changing values at runtime. Added 'field_changed' callback for proto header which may be used for check if csum updating is needed. This callback is called after field was changed at runtime. Added 'packet_update' callback to let proto header know when to apply final proto header changes at runtime (e.g. - csum update). Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-09-21mz: Check device argument by ifindex instead of name prefixVadim Kochan2-7/+7
Check device argument by valid ifindex instead of guessing it by different device name prefixes like "eth", "ath", "ens", "enp". Use __device_ifindex(...) function for this, which needs to add few more dependencies like sock.o, link.o to the Makefile for mausezahn. Closes #159 Suggested-by: Tobias Klauser <tklauser@distanz.ch> Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-09-15build: configure: Add option to specify install path for /etc filesVadim Kochan1-0/+10
Add new '--sysconfdir=PREFIX' option to control installation of config files, files will be installed into PREFIX/etc path. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-09-15build: configure: Add option to specify install path for binary filesVadim Kochan2-1/+26
Add new --prefix=PREFIX configure commandline option to specify installation directory for binaries. Add additional check in 'Cmds' file if --prefix was specified from 'configure' script, in that case required installation path components will be created automatically as it is done for 'make PREFIX=...' option. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-09-15ui: Rename ui_table_row_print -> ui_table_row_col_setVadim Kochan3-25/+25
Really ui_table_row_print(x) no more prints anything, it just sets column value in a row. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-09-15flowtop: Add horizontal scrolling over flows tableVadim Kochan3-19/+46
Add left/right scrolling for flows list table to make possible see all the columns with a smaller display size. Handle 'Left' & 'Right' keypress to scroll left or right. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-09-15flowtop: Render table row via raw ncurses bufferVadim Kochan3-14/+86
Render each column to the ncurses raw buffer first, this buffer contains ncurses {char:attr} elements which will be printed to the screen after ui_table_row_show() will be called (at the end of columns rendering by flowtop). The reason of this change is to have easy way to make horizontal scrolling over this buffer. Approach is used from the 'htop' tool. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-09-15ifpps: Prevent division by zeroTobias Klauser1-15/+25
Even though it's very unlikely we ever read zero values from the cpu lines in /proc/stat, we should still protect against division by zero. Detected using UBSan. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-09-15trafgen: proto: Initialize lower proto header pointer on declarationTobias Klauser1-6/+2
Assign the pointer to the lower layer header on declaration instead of a separate line. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-08-17build: configure: Add option to enable debug symbolsVadim Kochan2-1/+11
Add '--enable-debug' option to enable debugging symbols, the reason is to simplify it by ./configure it once and do not execute 'make DEBUG=1' each time for a long debug session. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-08-12trafgen: proto: Split static protocol definition out of struct proto_hdrTobias Klauser6-78/+83
Currently struct proto_hdr is used twofold: 1) Statically define protocol behavior, i.e. all the *_hdr definitions in trafgen_l{2,3,4}.c which map a protocol id/layer to a set of callback functions. 2) For each packet created at parse time the struct is memcpy()'ed (including all the static information from 1) and then used to store dynamic information at parse/run time. Thus, struct proto_hdr members such as the proto id, layer and the pointers callback functions get copied for each created packet (in addition to the other fields which get changed during parsing). Also, static/dynamic information get mixed and we e.g. can't make the protocol definitions const to ensure they'll not get changed by mistake. Rather than copying the struct proto_hdr for every packet, clearly separate the two purposes defined above by splitting struct proto_hdr into two structs: 1) struct proto_ops for the static (const) protocol behavior definition 2) struct proto_hdr (reduced) for dynamic information struct proto_hdr keeps a pointer to the corresponding proto_ops instance and uses it to execute the corresponding callbacks. Reference: https://groups.google.com/forum/#!msg/netsniff-ng/20RvwJdh50Y/eMkbmKSaBgAJ Acked-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-08-12colorize: Squash colorize macros into colors.hVadim Kochan3-9/+4
Move colorize_xxx macroes to colors.h, the reason is to have one file for coloring stuff and have less files in the source tree. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-08-10trafgen: proto: Add space between switch statement and opening parenthesisTobias Klauser2-3/+3
Follow common coding style and use: switch (...) instead of: switch(...) Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-08-10build: Disable all optimization options for debug buildsTobias Klauser1-8/+10
Disable all optimizations with the GCC -O0 switch. Only explicitely enable additional optimization options for non-debug builds. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-08-09trafgen: proto: Make bytes pointer const in proto field set functionsTobias Klauser3-6/+9
Make the __proto_field_set_bytes() take a const uint8_t *bytes pointer and also changed all callers accordingly. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-08-09trafgen: parser: Check read access to file before invoking cppTobias Klauser1-2/+8
If a non-accessible (or non-existing) file is passed to trafgen and the -p/--cpp option is used, the preprocessor will fail but trafgen will continue running and producing follow-up errors messages: cpp: error: foo.conf: No such file or directory cpp: warning: ‘-x c’ after last input file has no effect cpp: fatal error: no input files compilation terminated. 0 packets to schedule Enabled kernel qdisc bypass 0 bytes in total Running! Hang up with ^C! Enabled kernel qdisc bypass TX,V2: 0.50 MiB, 256 Frames, each 2048 Byte allocated TX,V2: 0.50 MiB, 256 Frames, each 2048 Byte allocated 0 packets outgoing 0 bytes outgoing 0 sec, 0 usec on CPU0 (0 packets) 0 sec, 0 usec on CPU1 (0 packets) To avoid this, check that the file is readable before passing it to the preprocessor and error out if is not readable. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-08-09trafgen: proto: Store registered protocols in an arrayTobias Klauser2-13/+9
Protocols are registered early at startup and aren't changed at runtime. In order to speed up lookup while parsing, store the pointers to the protocol definitions (struct proto_hdr) in an array, indexed by protocol id rather than in a linked list. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-08-09trafgen: proto: Don't store context in each proto headerTobias Klauser2-17/+7
Use a module variable to access the proto context instead of storing a pointer in every header. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-08-05trafgen: proto: Use field id as array indexVadim Kochan2-8/+7
Usually proto fields array are sorted in the same order as the respective enum. Thus, the id can be used used as an array index for faster lookup. Add an explanatory comment and enforce the correspondence of id and index using bug_on(). This will make csum field calculation a little faster at runtime. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-08-05build: configure: Allow to compile tools without libnlTobias Klauser2-3/+35
With libnl being made optional in commits 20a5e15443bf ("netsniff-ng: Allow to compile without libnl") and c831bcda3e26 ("trafgen: Allow to compile without libnl"), we can now compile netsniff-ng and trafgen without libnl being present. For now we don't consider libnl and libnl-route separately, meaning that if libnl-route is not present, we disable libnl support entirely. Also add a configure option to explicitely disable building netsniff-ng and trafgen with libnl support. Based on original patch by Vadim Kochan. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-08-05netsniff-ng: Allow to compile without libnlVadim Kochan5-14/+29
One might not want to install libnl just for sniffing packets, for example if netsniff-ng will be compiled on embedded or switch system. Hide libnl dependend code if CONFIG_LIBNL=0. In case the `--rfraw' option is used, the user will get a panic message. In case of netlink messages being sniffed, they will not be dissected. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-08-05trafgen: Allow to compile without libnlVadim Kochan3-7/+29
trafgen uses libnl only to inject mac80211 frames but it might be not needed in some embedded or switch environments. Let's make it possible to disable this feature. In case the `--rfraw' option is used, the user will get a panic message. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-08-04build: configure: Use command line options to disable optional librariesTobias Klauser3-10/+50
Make the configure script accept command line options similar to the autotools generated configure. Implement --disable-geoip and --disable-zlib and use the to replace the respective DISABLE_* variables introduced in 0349b93a6689a ("build: configure: Allow to disable support for libgeoip and zlib"). Also update INSTALL and the travis CI configuration accordingly. Based on previous work by Vadim Kochan. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-08-02trafgen: proto: Move proto headers into packetVadim Kochan3-24/+28
Until now headers were used only for packet creation at compile time, which does not allow to handle dynamic field updates at runtime. To support dynamic updates, it is necessary to keep the proto_hdr entries around after packet compilation so we can reference the header fields to dynamically update. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> [tk: Adjust patch description, simplify code] Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-08-02trafgen: proto: Reference to packet from struct proto_hdrVadim Kochan4-6/+23
Using of current_packet() is not possible for dynamically updated fields so we need to keep the packet index in proto_hdr struct to reference the correct packet. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-08-02dissectors: ethernet: Don't resolve OUI for locally administered addressesTobias Klauser1-0/+7
Locally administered addresses do not contain an OUI, thus do not try to resolve it. Instead show "Locally Administered" as the vendor string. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-07-29netsniff-ng: Account skipped packets as 'seen' and 'dropped'Paolo Abeni1-2/+14
The packets filtered out due to pkt_type are incoming packets effectively dropped and should be accounted as such. This patch explicitly accounts for the skipped packets number in skip_packet() and adds this number to the 'drop' and 'seen' counters in update_rx_stats(). Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-07-27trafgen: Move applying of dynamic elements to own functionVadim Kochan1-14/+11
The same code for applying dynamic elements to a packet is used for both slow & fast path modes, so let's move it into one inlined function. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-07-21netsniff-ng: Increment pkts_seen after packet type checkPaolo Abeni1-2/+2
Currently in receive_to_xmit() pkts_seen is incremented before the packet type check, but failing the latter will cause the packet to be ignored, pretty much as if it failed to pass the filter. This change moves the accunting after the check, as is currently done in both walk_t3_block() and recv_only_or_dump(). Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-07-21AUTHORS: Add Paolo Abeni for his contributionTobias Klauser1-0/+1
Add Paolo Abeni to AUTHORS for commit 81f8c546d90b ("netsniff-ng: Skip duplicated packets on loopback device"). Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-07-21netsniff-ng: Skip duplicated packets on loopback devicePaolo Abeni1-10/+22
When sniffing on the loopback device, each packet will be seen twice, once per direction. To avoid duplicates, explicitly skip OUTGOING packets received from loopback, if no packet_type filter is explicitly set. Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-07-18trafgen: udp: Do not use user-provided 'len' field to calculate csumVadim Kochan1-2/+0
Do not use user-provided 'len' field for csum calculation which is potentially dangerous due to possible read buffer overflows. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> [tk: reword commit message] Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-07-18trafgen: ipv4: Do not use user-provided 'ihl' field to calculate csumVadim Kochan3-4/+5
It is potentially dangerous to use the user specified IHL field for csum calculation, as it might lead to read buffer overflows. Instead introduce and use the len field in struct proto_hdr which is calculated automatically after the header is built. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> [tk: reword commit message] Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-07-16trafgen: ipv4: Set default proto as ipv6-in-ipv4 for ipv6()Vadim Kochan1-0/+3
Set default ip proto field to IPPROTO_IPV6(41) if the higher protocol was specified as ipv6(). Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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