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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>
2016-07-13trafgen: proto: Add ICMPv4 header generationVadim Kochan7-1/+142
Support for generating ICMPv4 headers using the 'icmp4()/icmpv4()' trafgen generation functions. Fields supported: type Set type field (default 0: Echo reply) Supported keywords: echorequest, echoreply code Set code field (default 0) csum Set checksum field (calculated by default) mtu Set mtu field for destination unreachable (default 0) seq Set sequence field (default 0) id Set identifier field (default 0) addr Set redirect address (default 0.0.0.0) Example (send ping request): { icmpv4(echorequest, seq=1, id=1326) } Signed-off-by: Vadim Kochan <vadim4j@gmail.com> [tk: squash commits, consistency between functionality and docu] Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-07-11trafgen: parser: Replace 'mtype' by 'type'Vadim Kochan3-7/+6
After splitting etype & type to different tokens it is possible to use 'type' for ICMP type field which is used by RFC. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-07-11trafgen: parser: Split [e]type to separate keywordsVadim Kochan2-2/+4
Split [e]type to separate 'type' & 'etype' keywords, the reason is that 'type' might be used in other protocol headers (e.g. ICMP). Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-06-22AUTHORS: Add Hisao Tanabe for his contributionTobias Klauser1-0/+1
Add Hisao Tanabe to AUTHORS for commit b0230ce4 ("man: netsniff-ng: Fix usage example description"). Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-06-22man: netsniff-ng: Fix usage example descriptionHisao Tanabe1-1/+1
Fix the input device name that is used in the description of the usage example. Signed-off-by: Hisao Tanabe <xtanabe@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-06-22netsniff-ng: pcap_io: Print unsupported magic numberVadim Kochan1-1/+1
It might be more understandable to print unsupported pcap magic number in hexadecimal format. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-04-30man: mausezahn: Fix man warningsTobias Klauser1-3/+3
Fix warnings such as the following, reported by lintian [1]: usr/share/man/man8/mausezahn.8.gz 106: warning: macro `'own''' not defined [1] https://lintian.debian.org/maintainer/daniel.borkmann@alumni.ethz.ch.html#netsniff-ng Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-04-29doc: Document Travis CI Coverity integrationTobias Klauser1-2/+7
Update README.devel with information about the Travis CI Coverity integration. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-04-29build: travis: Move coverity_scan to existing addons configurationTobias Klauser1-12/+10
Move the coverity_scan configuration to the exisint, otherwise the apt packages won't get installed it seems. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-04-29build: travis: Set up Coverity scanTobias Klauser1-0/+14
Set up Travis CI integration for Coverity scan according to https://scan.coverity.com/travis_ci Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-04-27ring: Mark potentially unused parameters as suchTobias Klauser1-2/+4
The parameters to tpacket_uhdr_vlan_tci() and tpacket_uhdr_vlan_proto() might be unused, depending on the definition of HAVE_TPACKET3 and TP_STATUS_VLAN_TPID_VALID. Thus, mark them with __maybe_unused to prevent -Wunused-parameter warnings. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-04-27ring: Remove unused parameter sock from setup_ring_layout_generic()Tobias Klauser4-4/+4
setup_ring_layout_generic() takes an "int sock" parameter but never uses it. Remove it to prevent -Wunused-parameter warnings. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-04-27flowtop: Mark parameter in callback function as unusedTobias Klauser1-1/+1
Mark the nf_conntrack_msg_type parameter to flow_dump_cb with __maybe_unused to prevent a warning when compiling with -Wunused-parameter. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-04-26ifpps: Mark arg parameter of on_panic_handler() as unusedTobias Klauser1-1/+1
This fixes the following -Wunused-parameter warning: ifpps.c: In function ‘on_panic_handler’: ifpps.c:1128:36: warning: unused parameter ‘arg’ [-Wunused-parameter] static void on_panic_handler(void *arg) Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-04-26flowtop: Use fl argument instead of hard coded global flow_listTobias Klauser1-1/+1
The only place where flow_list_update_entry() is called passes the global flow_list anyway, so use the passed argument instead of the global. This fixes the following -Wunused-parameter warning: flowtop.c: In function ‘flow_list_update_entry’: flowtop.c:1438:53: warning: unused parameter ‘fl’ [-Wunused-parameter] static int flow_list_update_entry(struct flow_list *fl, struct nf_conntrack *ct) Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-04-26flowtop: Remove unused parameters from draw_help() and draw_footer()Tobias Klauser1-4/+4
The WINDOW *screen parameter to draw_help() and draw_footer() is unused, so remove it. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-04-26flowtop: Remove unused parameters from draw_flow_entry()Vadim Kochan1-2/+2
Remove unused "screen" & "line" parameters from draw_flow_entry(). Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-04-26cpp: Use mkstemps() to create unique temporary fileTobias Klauser1-4/+9
Use mkstemps() 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>
2016-04-26trafgen: 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>
2016-04-26ioops: Add mkostemp_or_die() wrapper for mkostemp(3)Tobias Klauser2-0/+11
Add a panic()ing wrapper for mkostemp(3). This will be used to safely create unique temporary files. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-04-25trafgen: proto: Add ICMPv6 header generationTobias Klauser7-0/+125
Support for generating simple ICMPv6 headers using the 'icmp6()/icmpv6()' trafgen generation function. Fields supported: mtype Message type (default: 0) Supported keywords: echorequest, echoreply code Code (default: 0) csum Message checksum (calculated by default) Examples: { eth(), ipv6(daddr=::1), icmpv6(echorequest), 42, 42, 0, 0 }' If not explicitely specified, the lower header is initialized as Ethernet. Suggested-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-04-25trafgen: proto: Add IPv6 header generationTobias Klauser8-40/+254
Support for generating simple IPv6 headers using the 'ip6()/ipv6()' trafgen generation function. Fields supported: ver|version Version (default: 6) tc|tclass Traffic class (default: 0) fl|flow Flow Label (default: 0) len|length Payload length (calculated by default) nh|nexthdr Type of next header (default: 0) hl|hoplimit|ttl Hop Limit, TTL (default: 0) sa|saddr Source IPv6 address (default: device address) da|daddr Destination IPv6 address (default: 0:0:0:0:0:0:0:0) Examples: { eth(), ipv6(daddr=1:2:3:4:5:6:7:8) } { ipv6(tc=2, hl=3, daddr=::1) } { eth(), ipv6(nh=58, sa=2001:db8::, da=::1), 128, 0, 0x52, 0x03, 0, 0, 0, 0 } If not explicitely specified, the lower header is initialized as Ethernet. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-04-22man: trafgen: Add example program, rewritten using the trafgen functionsTobias Klauser1-0/+13
Show how the trafgen header generation functions can make a trafgen script much more concise by rewritting Jesper's example using these functions. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-04-22trafgen: proto: Replace panic() with bug() where applicableTobias Klauser3-4/+3
In some cases we use panic() in situations where the error could only happen due to an implementation error. Use bug() there as it is more applicable, as panic() is mainly used to report system call errors. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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