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2020-10-02all: change bug report instructions in copyright messageTobias Klauser1-1/+2
The bugs@netsniff-ng.org e-mail bounces. Also it's more convenient to report bugs using GitHub rather than via e-mail, so consistently mention https://github.com/netsniff-ng/netsniff-ng/issues for where to report bugs. Fixes #226 Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2020-06-19trafgen: remove write-only variable pktTobias Klauser1-3/+1
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2019-04-10trafgen: fix -t 0 option to use sendtoQuentin Chateau1-5/+0
Currently, using -t 0 option calls shaper_set_delay with 0 sec and 0 ns, which results in sh->type to be SHAPER_NONE. This in turn causes trafgen to use TX_RING. Expected behavior, from "man trafgen": If this option is given, then instead of packet(7)'s TX_RING interface, trafgen will use sendto(2) I/O for network packets, even if the argument is 0. This patch forces sh->type to be set to SHAPER_DELAY even if the delay is 0. shaper_delay already handles the case where sh->type is SHAPER_DELAY and the delay is 0. Fixes #208 Signed-off-by: Quentin Chateau <quentin.chateau@gmail.com> [tklauser: adjusted commit message to include change description] Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2018-06-20trafgen: support ICMPv6 checksumsRadoslav Bodo1-0/+6
Usage: csumicmp6(14, 54) Signed-off-by: Radoslav Bodo <bodik@cesnet.cz> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2018-03-06all: drop fmem{cpy,set}Tobias Klauser1-5/+5
There is no need to explicity use the builtins. According to [1], GCC will recognize mem{cpy,set} as built-in functions, unless the corresponding -fno-builtin-* option is specified (which is not the case for netsniff-ng). [1] https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2018-03-06trafgen: don't close dev_out and dev_in in parent processTobias Klauser1-4/+4
They are opened in main_loop which is only executed in the child(ren), so close them there again. This avoids closing the devices twice, which may lead to segfaults. Fixes #188 Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2017-12-14trafgen: fix dinc()/ddec() modifiersPaolo Abeni1-12/+2
currently, after dinc(), the valued stored inside the packet is not in the (min, max) range but in the (0, max - min + 1) range, 'counter->val' should be used instead of 'val'. Additionally the values computed for ddec() are corrupted, in: val = (val - counter->inc) % (counter->min - counter->max + 1); the divider is negative, we should use (counter->max - counter->min + 1) as in the INC case. Finally we can avoid the switch statement at update time, inverting the value of 'counter->inc' for decrement and using a data type wide enough for the 'inc' field. v1 -> v2: - changed 'counter->inc' type to int Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2017-10-20trafgen: fix NULL pointer dereference in -i option parsingTobias Klauser1-5/+3
If trafgen is called with the -i option, it currently crashes due to an NULL pointer dereference. Fix it. Fixes Coverity CID 1381809 Fixes: 82a3c204c6f1 ("trafgen: Allow send packets from pcap file") Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2017-09-15trafgen: fix packet socket initialization with multiple CPUsPaolo Abeni1-2/+4
The commit 78c13b71e196 ("trafgen: Allow to generate packets to output pcap file") introduced a regression when output is a network device and multiple CPU are in use: the packet socket is created before fork() and thus the socket is shared among all the processes: all of them except the first will fail while setting the tx_ring. Fix it splitting the io open() helper in a create() op, called before forking, and the open() op called by each process. Fixes: 78c13b71e196 ("trafgen: Allow to generate packets to output pcap file") Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2017-08-10trafgen: Dump proto headers in *.cfg formatVadim Kochan1-27/+27
Added trafgen_dump.c module which dumps headers from packet in .cfg format. Packet is dumped if -o <file>.cfg was specified, it might be useful to specify *.pcap file as input and convert it into .cfg file to edit proto fields in human readable format. To make it possible several main changes were added: 1) packet id is embedded into struct packet.id, and it is updated on each realloc_packet() 2) Added new struct proto_hdr.get_next_proto callback to make possible apply fields of next header. 3) Added new dev_io ops for writting packets into .cfg file, to re-use common dev_io mechsnism for packets dumping. Before dump the default ETH_PROTO fields are applied as first header and then next proto_hdr is identified via .get_next_proto(...) callback. Meanwhile only eth, arp, vlan, ip4, udp, & tcp protos can be dissected into *.cfg format. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2017-08-10trafgen: dev_io: Change read/write to specify struct packet *Vadim Kochan1-21/+4
Refactor dev_io_ops read & write to specify struct packet *, it may simplify a bit a caller logic. And it allow to keep required members within one struct packet object. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2017-07-17trafgen: Delegate creation of rfraw to dev_io APIVadim Kochan1-16/+9
Simplify a bit of creation rfraw device by delegating it to the dev_io API, also in case the output device is pcap file the --rfraw option sets the link type to ieee80211 radio tap. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2017-06-20trafgen: gracefully handle ENOBUFS on tx ring teardownTobias Klauser1-2/+3
pull_and_flush_tx_ring_wait() in the exit path of xmit_fastpath_or_die() might return with errno ENOBUFS (due to the other CPU's processes concurrent access) but will eventually suceed. Thus retry pull_and_flush_tx_ring_wait() as in the main loop of xmit_fastpath_or_die(). Fixes #175 Reported-by: Eduardo Miravalls Sierra Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2017-06-19trafgen: Fix output pcap file name length trimmingVadim Kochan1-1/+1
Trim output name to IFNAMSIZ only if the output is a networking device, otherwise the following error occured if output name is greater then IFNAMSIZ: $ trafgen -n 1 '{ udp() }' -o /tmp/xxxxxxxxxxxxxx.pcap No networking device or pcap file: /tmp/xxxxxxxxxx Failed to open output device Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2017-06-09trafgen: Allow to generate packets to output pcap fileVadim Kochan1-63/+39
Add trafgen_dev.c module which provides generic way of reading and writing packets to/from networking device or a pcap file. Also allow to handle output pcap file via '-o, --out, --dev' option. It might be useful in future for testing some link protocols which is not easy to capture (e.g. wlan packets) w/o having some special setup. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> [tklauser: fix whitespace issues] Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2017-02-09trafgen: Allow send packets from pcap fileVadim Kochan1-34/+132
Add ability to send packets from pcap file if it has ".pcap" extension via "-i,--in" option. By default packet sending is delayed considering original packets timestamps if no rate or delay is specified via -b/-t options. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-12-13zsh: trafgen: Add missing option -q/--qdisc-path to zsh completionTobias Klauser1-1/+1
Also sightly adjust the description in the usage text. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-12-08all: Remove unused longindex parameter to getopt_long()Tobias Klauser1-2/+2
All tools (except mausezahn) use getopt_long() and pass a pointer to a local opt_index variable for the longindex parameter. However, this variable is never read afterwards. According to getopt(3) it's perfectly fine to pass NULL as the longindex parameter instead, so do that. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-09-21trafgen: proto: Update field value at runtimeVadim Kochan1-0/+9
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>
2016-07-27trafgen: 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>
2016-04-26trafgen: Use mkostemp_or_die() to create unique temporary fileTobias Klauser1-8/+2
Use the mkostemp_or_die() wrapper introduced in commit a87f181bd836 ("ioops: Add mkostemp_or_die") to safely create a unique temporary file instead of using rand() to manually create a (potentially unsafe) temporary filename. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-01-28trafgen: Add basic protocol generation logicVadim Kochan1-0/+3
Add new trafgen_proto.c module with basic protocol header fields generation logic. This will allow to support protocol specific keywords in the trafgen configuration language. Each protocol must implement struct proto_hdr and register it to the global proto list. Protocol headers consist of a set of fields, and each field must be described via struct proto_field by specifying unique id, length and offset (relative to the header start). Fields smaller than 8 bits can be described via left shift & mask. The following callbacks are invoked to perform special actions to build the header during parsing: 1) header_init - required fields must be added to the packet and initialized with default values. 2) header_finish - it is invoked when header is specified, all user specified fields are set. 3) packet_finish - callback is invoked from upper to lower header to calculate fields depending on upper layers such as total length or checksum. The protocol generation API provides convenience protocol field setters/getters to to be used in the parser while crafting the packet. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> [tk: wordsmithing on commit message, minor variable type changes] Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-01-14trafgen: Simplify ring size unit parsingVadim Kochan1-12/+7
Lets strtoul(...) func set pointer of unit name for ring size option, instead of check each character by isdigit(...). Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-01-14trafgen: Simplify 'gap' option unit parsingVadim Kochan1-8/+3
It is not needed to parse each character to find unit name in the option string but just let to do it via strtoul providing the pointer which will keep non numeric value. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-01-12trafgen: Move gap feature into shaper logicVadim Kochan1-28/+40
Move gap feature into rate shaper, as these features means the same - delay the packet sending. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-01-05trafgen: Fix typo of kbit in usage and manpageTobias Klauser1-1/+1
Use 'kbit' instead of kBit in usage and manpage to actually reflect what trafgen expects. Fixes: 9ece0fe02096 ("trafgen: Add option to specify packets sending rate") Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-01-05trafgen: Add option to specify packets sending rateVadim Kochan1-9/+131
Added -b,--rate option in units of: pps/B/kB/MB/kBit/Mbit/Gbit/KiB/MiB/GiB to specify rate at which packets will be sent. Similarly to -t,--gap option the packets will be sent in slow mode with 1 CPU. Tested with ifpps. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-12-17trafgen: Added option to pass macro/define for C preprocessorVadim Kochan1-4/+15
Add -D,--define option which allows to pass multiple macro/defines which can be used in trafgen script (e.g. by #ifdef ). Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-11-24trafgen: Preprocess packets directly after compilingTobias Klauser1-4/+2
No need to duplicate the call to preprocess_packets(), just call it directly after compile_packets()/compile_packets_str(). Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-11-24trafgen: Fix error message if no packet configuration is givenTobias Klauser1-1/+1
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-11-09csum: Remove unused parameter from calc_csum()Tobias Klauser1-1/+1
The `ccsum' parameter to calc_csum() is never used and is set to 0 by all callers. There's no reason to keep it, so remove it. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-11-09trafgen: Allow to build packet from command lineVadim Kochan1-5/+18
Craft packet directly from command line with same syntax as for conf file. It might be as first step to extend current syntax with specific proto fields. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-11-07trafgen, minor: newline in help textDaniel Borkmann1-1/+1
Just add a newline before notes. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2015-11-05trafgen: let the kernel check min/max transm. unit boundariesDaniel Borkmann1-10/+2
Let AF_PACKET do this job to fail in case boundaries are too small or too large. I found it quite useful for testing the kernel. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2015-11-05trafgen: Fix typo in error messageTobias Klauser1-1/+1
Spell out "resolve" properly. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-11-02trafgen: Pre-calculate checksums if possibleTobias Klauser1-0/+19
The TCP/UDP checksums cannot be calculated in the parser as the packet payload following the TCP/UDP header is not yet know. However, we can calculate these checksums before the send loop if the only dynamic elements of the packet are checksums. This change avoids the overhead of recalculating the checksums for every iteration the send loop in these cases. Suggested-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-10-28all: Change reporting bugs emailVadim Kochan1-1/+1
Replace bugs@netsniff-ng.com with netsniff-ng@googlegroups.com which is used in REPORTING-BUGS file. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-10-14trafgen: Move checking of dynamic packet elements to headerTobias Klauser1-2/+2
Move has_dynamic_elems() to to trafgen_conf.h, rename it to packet_dyn_has_elems() and use it to check whether dynamic packet elements are present. Also change the return type to bool and use || instead of + to potentially make use of short-circuit evaluation. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-10-13trafgen: Make xmit_packet_precheck() return voidTobias Klauser1-6/+3
The return value of xmit_packet_precheck() is always 0 and it calls panic() in any error cases, so its return value isn't of any use. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-10-13trafgen: Add checksum helpers for TCP/UDP over IPv6Tobias Klauser1-0/+12
Add the csumudp6 and csumtcp6 helper functions in order to simplify checksum generation for TCP/UDP packets sent over IPv6. trafgen example for TCP over IPv6: { /* MAC Destination */ fill(0xff, 6), /* MAC Source */ 0x00, 0x02, 0xb3, drnd(3), /* IPv6 Protocol */ c16(0x86DD), /* Version, Traffic Class, Flow Label */ 0b01100000, c8(0), c16(0), /* Payload Length */ c16(54), /* Next Header (TCP) */ c8(6), /* Hop Limit */ c8(64), /* Source IPv6 */ 0xfe, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xba, 0xac, 0x6f, 0xff, 0xfe, 0xa4, 0x12, 0xe3, /* Destination IPv6 */ 0xfe, 0x80, 0x82, 0x2e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xde, 0xff, 0xfe, 0x00, 0x06, 0xde, /* TCP Source Port */ c16(55042), /* TCP Destination Port */ c16(55043), /* TCP Sequence Number */ drnd(4), /* TCP Ackn. Number */ c32(0), /* TCP Header length + TCP SYN/ECN Flag */ c16((8 << 12) | (1 << 1) | (1 << 6)) /* Window Size */ c16(16), /* TCP Checksum (offset IPv6, offset TCP) */ csumtcp6(14, 54), /* TCP Options */ 0x00, 0x00, 0x01, 0x01, 0x08, 0x0a, 0x06, 0x91, 0x68, 0x7d, 0x06, 0x91, 0x68, 0x6f, /* Data blob */ "foobar!", } Suggested-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-06-30trafgen: Print min packet size in error messageVadim Kochan1-3/+6
Print minimum needed packet size in case if validation error. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-05-06sock: Fix capturing extra packets from other devVadim Kochan1-1/+1
Create PF_PACKET socket with proto=0 which does not setup packet handler and will not capture packets until bind() will be invoked. Also replaced pf_tx_socket by pf_socket as these funcs became the same, as proto arg is set to 0. Suggested-by: Daniel Borkmann <borkmann@iogearbox.net> Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-05-05die: Rename *_panic_func to *_panic_handlerVadim Kochan1-1/+1
Rename xxx_panic_func(s) to xxx_panic_handler(s) which is more understandable than 'func'. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-05-04trafgen: Delete rfmon mac80211 device on panicVadim Kochan1-0/+6
Fixed case when rfmon mac80211 created device remains after trafgen failed (for ex. - incorrect cfg file), so just delete it when panic occured. Also made panic handlers invoking per process and only once. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-03-31trafgen: Alloc cpus according to specified number of packetsVadim Kochan1-0/+8
Trafgen uses all the online CPUs even if the number of packets specified by -n is less than the number of selected CPUs. Such behaviour leads to issues: - trafgen re-calculates number of packets per CPU which leads to rounding it to 0 then no packets will be sent. - trafgen might send more packets than specified by -n because of using all the online cpus. Fixed by taking min(#CPUs, #packets) as the number of CPUs if a number of packets is specified by -n. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> [tklauser: moved code and added explanatory comment] Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-03-31trafgen: Remove note about trafgen.txf example from help textTobias Klauser1-1/+2
We no longer ship example trafgen config files. Instead, mention the netsniff-ng conversion facility. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-01-30trafgen: disable timer slackEric Dumazet1-0/+2
linux has default time slack of 50 usec, which means that trafgen 'gap' option is unable to precisely control delays. Set the process timer slack to the minimum of 1 nsec. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2014-12-12all: Reduce amount of empty liens in usage and version output a bitTobias Klauser1-5/+5
No need for some of the empty lines, remove them to make the output a bit denser. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2014-09-05trafgen: Don't duplicate copyright/bug report/license stringTobias Klauser1-14/+11
Move the copyright/bug report/license string to an own constant and use it for the output of help() and version() to avoid duplication and prevent the strings from getting out of sync. This makes the text section of trafgen.o slightly smaller: before: text data bss dec hex filename 18512 0 104 18616 48b8 trafgen/trafgen.o after: text data bss dec hex filename 18240 0 104 18344 47a8 trafgen/trafgen.o Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2014-09-05trafgen: Consistently use unsigned int for number of CPUsTobias Klauser1-9/+9
The number of CPUs is stored in ctx.cpus which is unsigned int, so use unsigned int consistently when using CPU number. Negative CPU numbers wont occur anyhow. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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