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2016-02-23trafgen: parser: Add syntax for MPLS header creatingVadim Kochan1-1/+33
Add 'mpls()' function for creating MPLS header with parameters: lbl|label MPLS label last Indicates the last label on MPLS stack tc|tclass|exp Traffic Class (TC) ttl TTL (Time To Live) Currently only unicast MPLS is supported, but multicast might be set via 'eth()' function. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-02-02trafgen: parser: Add syntax for VLAN header creatingVadim Kochan1-0/+40
Add 'vlan()' function to generate VLAN header. Fields supported: tpid|proto Set TPID (Tag Protocol Identifier) (default 0x8100) 1ad Set TPID field as 0x88a8 1q Set TPID field as 0x8100 tci Set TCI (Tag Control Information) (default 0) pcp Set PCP (Priority Code Point) (PCP) (default 0) dei|cfi Set DEI (Drop Eligible Indicator) (default 0) id Set VID (VLAN Identifier) (default 0) Examples: { eth(), vlan(id=1), ipv4() } { vlan(id=1, 1ad), vlan(id=100, pcp=3), ipv4() } Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-02-02trafgen: proto: Simplify getting lower protocol after initVadim Kochan1-2/+1
Change proto_header_init(...) and proto_lower_default_add(...) functions to return struct proto_hdr * to do not call proto_current_header(...) after, so it makes more sense to get struct proto_hdr * right after initializing protocol by id. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-02-02trivial: trafgen: parser: Fix spacingTobias Klauser1-11/+11
Get rid of some unnecessary double spaces to make parsers rules look consistent. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-02-01trafgen: parser: Fix parsing of "prot[o]" field in eth()Tobias Klauser1-1/+6
Commit 2ba202b introduced the [e]type field for specifiying the Ethertype, but at the same time made the existing "prot[o]" field name not work anymore. Fix it by providing a specific parser rule as it cannot be solved in the lexer grammar alone (which will always use the first matching token). Fixes: 2ba202b ("trafgen: parser: Support "etype"/"type" keywords for Ethertype") Reported-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-02-01trafgen: parser: Add TCP header generation functionTobias Klauser1-1/+44
Add a function 'tcp()' to generate TCP headers from the trafgen configuration language. Fields supported: sp|sport TCP source port (default 0) dp|dport TCP destination port (default 0) seq Sequence number (default: 0) aseq|ackseq Acknowledgement number (default 0) doff|hlen Header length/data offset (default: 5) cwr Congestion Window Reduced flag (default: 0) ece|ecn ECN-Echo flag (default: 0) urg Urgent flag (default: 0) ack Acknowledgement flag (default: 0) psh Push flag (default: 0) rst Reset flag (default: 0) syn Synchronize flag (default: 0) fin Finish flag (default: 0) win|window Receive window size (default: 0) csum Checksum field (calculated automatically) urgptr Urgent pointer (default: 0) Example (SYN on port 80/http): { tcp(dport=80, syn, window=5840) } Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-01-29trafgen: parser: Rename IPv4 specific types and union membersTobias Klauser1-7/+7
Rename lexer/parser type and union member ip_addr to ip4_addr. This will make it easier to distinguish from IPv6 addresses, to be added an a follow-up patch. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-01-29trafgen: parser: Support "etype"/"type" keywords for EthertypeTobias Klauser1-4/+4
The IEEE 802.3 standard commonly refers to the field specifying the upper layer protocol as Ethertype, not protocol. Thus, also support the keywords "etype" and "type" for this field. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-01-29trafgen: parser: Add syntax to build UDP headerVadim Kochan1-0/+29
Add function 'udp()' to generate UDP header. Fields supported: sp|sport UDP source port (default 0) dp|dport UDP destination port (default 0) len|length Length of UDP header + payload (calculated automatically) csum Checksum field (calculated automatically) Example (Echo request): { udp(dport=7) } Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-01-29trafgen: parser: Add syntax for IPv4 protocol generationVadim Kochan1-0/+51
Add 'ip4(), ipv4()' function to build IPv4 header. Fields supported: ihl IPv4 header length (default 5 ) ver|version IPv4 version (default 4) ttl Time To Live (TTL) field (default 0) dscp DiffServ field (default 0) ecn ECN bits (default 0) tos TOS (DSCP + ECN) field (default 0) len|length IPv4 header + payload length (calculated by default) id Identifier (default 0) flags Flags field (default 0) frag Fragment offset (default 0) csum IPv4 header checksum (calculated by default) df Set DF (Dont Fragment) bit to 1 (default is 0) mf Set MF (More Fragments) bit to 1 (default is 0) sa|saddr IPv4 source address (default used from output device) da|daddr IPv4 destination address (default 0.0.0.0) proto IPv4 protocol id (default 0) Example: { ip4(df, mf, frag=100, prot=0x1, ecn=2, dscp=20) } { ip4(da=1.1.1.1), ip4(sa=3.3.3.3, da=3.3.3.4) } Last example generates IP-in-IP packet. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-01-28trafgen: parser: Add syntax to generate ARP header fieldsVadim Kochan1-1/+47
Add function 'arp()' to support generating ARP header fields from the trafgen configuration language. Supported fields: htype hardware type, default: 1 (Ethernet) ptype protocol type, default: 0x0800 (IP) op|oper operation (req|request, reply, <num>), default: 1 (request) sha|smac sender MAC address, default: device MAC spa|sip sender IP address, default: device IP tha|tmac target MAC address, default: 00:00:00:00:00:00 tpa|tip target IP address, default: 0.0.0.0 Note: setting hlen and tlen is not supported, these will by set to hlen=6 and plen=4 in any case. Example usage: { arp(op=request, sip=1.1.1.1, smac=11:22:33:44:55:66, tip=42.42.42.42) } { arp() } Signed-off-by: Vadim Kochan <vadim4j@gmail.com> [tk: document keywords in commit message] Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-01-28trafgen: parser: Add syntax to generate Ethernet header fieldsVadim Kochan1-1/+56
Add function 'eth()' to support generating Ethernet header fields from the trafgen configuration language. Supported fields: da|daddr destination address, default: 00:00:00:00:00:00 sa|saddr source address, default: device MAC prot|proto protocol number, default: 0x0000 Example usage: { eth(prot=0x0800, da=11:22:33:44:55:66), fill(0xff, 60) } { eth(prot=0x0800) } { eth() } It is important that proto_init is called before fields will be filled to initialize the specified proto with header fields. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> [tk: document supported keywords in commit message] Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-01-28trafgen: Add helper to get current packetVadim Kochan1-0/+5
Add current_packet() helper for getting current used packet and make it public to other modules. It will be used by proto generation logic. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-01-28trafgen: Export set_fill funcVadim Kochan1-1/+1
Make public set_fill func to be used by proto generation code. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-12-17cpp: Constify cpp argv passed to cpp_execTobias Klauser1-2/+2
Pass argv as char *const argv[] as execvp expects it. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-12-17trafgen: Added option to pass macro/define for C preprocessorVadim Kochan1-2/+3
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>
2015-12-17cpp: Allow to pass additional cpp optionsVadim Kochan1-1/+1
Extend cpp_exec function with args parameter to specify additional cpp options (like -D). Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-11-25trafgen: Make sure yyin is set before close itVadim Kochan1-1/+1
In case if cpp failed then it is possible that trafgen may hang on closing uninitialized yyin. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-11-24trafgen: Invoke C preprocessor from cpp.c moduleVadim Kochan1-12/+2
Use cpp_exec func to invoke C preprocesor. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-11-10bpfc, trafgen: Do not close stdin when "-" is specifiedVadim Kochan1-1/+2
Do not perform fclose for stdin fd. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> 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 Kochan1-0/+25
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>
2015-10-14trafgen: Move checking of dynamic packet elements to headerTobias Klauser1-6/+1
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: Change signature of compile_packets() to match provided typesTobias Klauser1-1/+1
Match two arguments to the respective types provided in its only caller in trafgen.c:main_loop() Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-10-13trafgen: Don't panic() on parser errorsTobias Klauser1-9/+18
If the C preprocessor is used to parse the packet description, a temporary file is created which is not deleted if an error occurs during parsing in compile_packets(). Instead, don't panic() on errors and only print a message, and only die() once we cleaned up after us. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-10-13trafgen: Add checksum helpers for TCP/UDP over IPv6Tobias Klauser1-6/+19
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>
2015-10-13trafgen: Adjust syntax error messageTobias Klauser1-1/+1
Make it more readable. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-02-05xmalloc: Make xrealloc() arguments conform to realloc()Tobias Klauser1-13/+13
xrealloc() has an additional nmemb argument compared to realloc() for which it should serve as a wrapper. Since we always call with nmemb = 1, we might as well remove this argument and thus have xrealloc() conform to the realloc() function prototype. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2014-05-03all: Use macros for printf/scanf format specifiersJames McCoy1-4/+4
Any types that are fixed width should use the standard format specifier macros (PRI... for printf-type functions, SCN... for scanf-type functions) to ensure proper data access. Prior to this ifpps was crashing in 32-bit environments due to the following call mvwprintw(screen, (*voff)++, 2, "%s,%s %s (%s%s), t=%lums, cpus=%u%s/%u" " ", uts.release, machine, ifname, drvinf.driver, buff, ms_interval, top_cpus, top_cpus > 0 && top_cpus < cpus ? "+1" : "", cpus); since ms_interval is a uint64_t but %lu expects an unsigned long, which is only 32 bits. Signed-off-by: James McCoy <vega.james@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2014-04-22conf: Use configuration file path from Makefile instead of hardcoded pathsTobias Klauser1-2/+2
Currently, the path to the configuration files is hardcoded to $PREFIX/etc/netsniff-ng. If we want to keep the configuration files outside of prefix (e.g. during development), we need to pass the complete path as specified in $ETCDIRE (and $ETCDIR respectively, which could e.g. be overriden on the command line during build install) as a preprocessor define. This way, we can e.g. install the configuration files to /etc while installing the binaries in /usr/local with: $ make PREFIX=/usr/local ETCDIR=/etc $ make PREFIX=/usr/local ETCDIR=/etc install Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2013-11-25trafgen: Check return value of system()Tobias Klauser1-1/+2
Check the return value of system() when invoking CPP in the BPF parser and bail out in case of an error. This fixes the following compiler warning: trafgen_parser.y:598:9: warning: ignoring return value of ‘system’, declared with attribute warn_unused_result [-Wunused-result] Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2013-06-04xutils: eliminate xutils, move rest to epoll2Daniel Borkmann1-1/+0
Finally eliminate xutils.{c,h} and move the rest to epoll2. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-06-04xutils: break out string handling and lockingDaniel Borkmann1-0/+1
Break out all string handling functions and lockme stuff in order to further eliminate the big code blob in xutils, so that it can be easier maintained. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-05-24misc: fix some minor compile warnings all overDaniel Borkmann1-2/+2
Some regarding unused parameter, some regarding signed/unsigned comparison. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-04-11trafgen: parser: fix regression on last pkt elementDaniel Borkmann1-2/+7
Jon Schipp reported that a arbitrary packet config such as ... { "MyPacket", "MyPacket", "MyPacket", "MyPacket", "MyPacket", "MyPacket", "MyPacket", "MyPacket", } ... doesn't work anymore, although it used to work. This regression was introduced by commit f9591eebe40c ("trafgen: lexer/parser: fix cpu() selection and whitespacing"). Reported-by: Jon Schipp <jonschipp@gmail.com> Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-03-27trafgen: parser: do not enforce whitesapceDaniel Borkmann1-3/+3
Do not enforce whitespace at the beginning or end of a packet configuration, there's no reason to do so. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-03-25trafgen: parser: add possibility for negative numbersDaniel Borkmann1-0/+2
The previous commit reduced it, so now we allow it within cX() containers in order to negate a result, if someone needs that. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-03-25trafgen: lexer/parser: fix cpu() selection and whitespacingDaniel Borkmann1-2/+12
It looks unintuitive when once needs to write cpu(0:3), so also allow cpu(0-3). Then it's quite stupid to enforce whitespace after the double colon before the curley braces open. So make this rather optional here. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-03-16build: respect PREFIX_STRING on config file locationsDaniel Borkmann1-1/+2
When setting a prefix from the build system, also pass this through the hard coded strings for config file locations in the toolkit, so that the installed files (which use PREFIX) can be properly found. Suggested-by: Peter Stuge <peter@stuge.se> Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-03-15all: import netsniff-ng 0.5.8-rc0 sourceDaniel Borkmann1-0/+611
We decided to get rid of the old Git history and start a new one for several reasons: *) Allow / enforce only high-quality commits (which was not the case for many commits in the history), have a policy that is more close to the one from the Linux kernel. With high quality commits, we mean code that is logically split into commits and commit messages that are signed-off and have a proper subject and message body. We do not allow automatic Github merges anymore, since they are total bullshit. However, we will either cherry-pick your patches or pull them manually. *) The old archive was about ~27MB for no particular good reason. This basically derived from the bad decision that also some PDF files where stored there. From this moment onwards, no binary objects are allowed to be stored in this repository anymore. The old archive is not wiped away from the Internet. You will still be able to find it, e.g. on git.cryptoism.org etc. Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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