Initial impl

libpcap can’t listen on all interfaces in single thread

.gitignore

@@ -11,4 +11,7 @@
 
 *.test
 .idea
+*.iml
 gor
+
+*.mprof

.travis.yml

@@ -1,3 +1,6 @@
 language: go
 go: 1.6
-script: sudo -E bash -c "source /etc/profile && eval '$(gimme 1.6)' && export GOPATH=$HOME/gopath:$GOPATH && go get && GORACE='halt_on_error=1' go test ./... -v -timeout 60s -race"
+script: sudo -E bash -c "source /etc/profile && eval '$(gimme 1.6)' && export GOPATH=$HOME/gopath:$GOPATH && go get && GORACE='halt_on_error=1' go test ./... -v -timeout 120s -race"
+
+before_install:
+  - sudo apt-get install libpcap-dev -y

COMM-LICENSE

@@ -0,0 +1,95 @@
+END-USER LICENSE AGREEMENT
+
+------------------------------------------------------------------------------
+
+IMPORTANT: THIS SOFTWARE END-USER LICENSE AGREEMENT ("EULA") IS A LEGAL AGREEMENT (“Agreement”) BETWEEN YOU (THE CUSTOMER, EITHER AS AN INDIVIDUAL OR, IF PURCHASED OR OTHERWISE ACQUIRED BY OR FOR AN ENTITY, AS AN ENTITY) AND REPLAY SOFTWARE. READ IT CAREFULLY BEFORE COMPLETING THE INSTALLATION PROCESS AND USING GOR PRO AND RELATED SOFTWARE COMPONENTS (“SOFTWARE”). IT PROVIDES A LICENSE TO USE THE SOFTWARE AND CONTAINS WARRANTY INFORMATION AND LIABILITY DISCLAIMERS. BY INSTALLING AND USING THE SOFTWARE, YOU ARE CONFIRMING YOUR ACCEPTANCE OF THE SOFTWARE AND AGREEING TO BECOME BOUND BY THE TERMS OF THIS AGREEMENT.
+
+------------------------------------------------------------------------------
+
+In order to use the Software under this Agreement, you must receive a “Source URL” at the time of purchase, in accordance with the scope of use and other terms specified for each type of Software and as set forth in this Section 1 of this Agreement. 
+
+1. License Grant
+
+1.1 General Use. This Agreement grants you a non-exclusive, non-transferable, limited license to the use rights for the Software, without the right to grant sublicenses, subject to the terms and conditions in this Agreement. The Software is licensed, not sold.
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+1.2 Unlimited Organization License. If you purchased an Organization License (included with the Gor Pro Software), you may install the Software on an unlimited number of Hosts. “Host” means any physical or virtual machine which is controlled by you. You may also run an unlimited number of Workers. “Worker” means a thread within a Gor server process which executes jobs. You may concurrently run the software on an unlimited number of Hosts, with each host running an unlimited number of Workers.
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+1.3 Limited Organization License. If you purchased an Organization License (included with the Gor Enterprise Software), you may install the Software on an unlimited number of Hosts. “Host” means any physical or virtual machine which is controlled by you. The aggregate number of Workers run by the hosts must not exceed the maximum number of Workers authorized at the time of purchase. “Worker” means a running Gor instance which intercept or replay traffic. In order to run additional Workers, you must purchase an additional allowance from Replay Software.
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+1.4 Appliance License. If you purchased an Appliance License, you may distribute the Software in any applications, frameworks, or elements (collectively referred to as an “Application” or “Applications”) that you develop using the Software in accordance with this EULA, provided that such distribution does not violate the restrictions set forth in section 3 of this EULA. You must not remove, obscure or interfere with any copyright, acknowledgment, attribution, trademark, warning or disclaimer statement affixed to, incorporated in or otherwise applied in connection with the Software. You are required to ensure that the Software is not reused by or with any applications other than those with which you distribute it as permitted herein. For example, if You install the Software on a customer’s server, that customer is not permitted to use the Software independently of your Application. You must inform Replay Software of your knowledge of any infringing use of the Software by any of your customers. You are liable for compliance by those third parties with the terms and conditions of this EULA. You will not owe Replay Software any royalties for your distribution of the Software in accordance with this EULA.
+
+1.5 Archive Copies. You are entitled to make a reasonable amount of copies of the Software for archival purposes. Each copy must reproduce all copyright and other proprietary rights notices on or in the Software Product.
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+1.6 Electronic Delivery. All Software and license documentation shall be delivered by electronic means unless otherwise specified on the applicable invoice or at the time of purchase. Software shall be deemed delivered when it is made available for download by you (“Delivery”).        
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+2. Modifications. Replay Software shall provide you with source code so that you can create Modifications of the original software. “Modification” means: (a) any addition to or deletion from the contents of a file included in the original Software or previous Modifications created by You, or (b) any new file that contains any part of the original Software or previous Modifications. While you retain all rights to any original work authored by you as part of the Modifications, We continue to own all copyright and other intellectual property rights in the Software.
+
+3. Restricted Uses. 
+
+3.1 You shall not (and shall not allow any third party to): (a) decompile, disassemble, or otherwise reverse engineer the Software or attempt to reconstruct or discover any source code, underlying ideas, algorithms, file formats or programming interfaces of the Software by any means whatsoever (except and only to the extent that applicable law prohibits or restricts reverse engineering restrictions); (b) distribute, sell, sublicense, rent, lease or use the Software for time sharing, hosting, service provider or like purposes, except as expressly permitted under this Agreement; (c) redistribute the Software or Modifications other than by including the Software or a portion thereof within your own product, which must have substantially different functionality than the Software or Modifications and must not allow any third party to use the Software or Modifications, or any portions thereof, for software development or application development purposes; (d) redistribute the Software as part of a product, "appliance" or "virtual server"; (e) redistribute the Software on any server which is not directly under your control; (f) remove any product identification, proprietary, copyright or other notices contained in the Software; (g) modify any part of the Software, create a derivative work of any part of the Software (except as permitted in Section 4), or incorporate the Software, except to the extent expressly authorized in writing by Replay Software; (h) publicly disseminate performance information or analysis (including, without limitation, benchmarks) from any source relating to the Software; (i) utilize any equipment, device, software, or other means designed to circumvent or remove any form of Source URL or copy protection used by Replay Software in connection with the Software, or use the Software together with any authorization code, Source URL, serial number, or other copy protection device not supplied by Replay Software; (j) use the Software to develop a product which is competitive with any Replay Software product offerings; or (k) use unauthorized Source URLS or keycode(s) or distribute or publish Source URLs or keycode(s), except as may be expressly permitted by Replay Software in writing. If your unique Source URL is ever published, Replay Software reserves the right to terminate your access without notice.
+
+3.2 UNDER NO CIRCUMSTANCES MAY YOU USE THE SOFTWARE AS PART OF A PRODUCT OR SERVICE THAT PROVIDES SIMILAR FUNCTIONALITY TO THE SOFTWARE ITSELF.
+
+The Open Source version of the Software (“LGPL Version”) is licensed
+under the terms of the GNU Lesser General Public License versions 3.0
+(“LGPL”) and not under this EULA. 
+
+4. Ownership. Notwithstanding anything to the contrary contained herein, except for the limited license rights expressly provided herein, Replay Software and its suppliers have and will retain all rights, title and interest (including, without limitation, all patent, copyright, trademark, trade secret and other intellectual property rights) in and to the Software and all copies, modifications and derivative works thereof (including any changes which incorporate any of your ideas, feedback or suggestions). You acknowledge that you are obtaining only a limited license right to the Software, and that irrespective of any use of the words “purchase”, “sale” or like terms hereunder no ownership rights are being conveyed to you under this Agreement or otherwise. 
+
+5. Fees and Payment. The Software license fees will be due and payable in full as set forth in the applicable invoice or at the time of purchase. If the Software does not function properly within two weeks of purchase, please contact us within those two weeks for a refund. You shall be responsible for all taxes, withholdings, duties and levies arising from the order (excluding taxes based on the net income of Replay Software). 
+
+6. Support, Maintenance and Services. Subject to the terms and conditions of this Agreement, as set forth in your invoice, and as set forth on the Gor Pro support page (https://github.com/buger/gor/wiki/Pro-Support), support and maintenance services may be included with the purchase of your license subscription.
+
+7. Term of Agreement. 
+
+7.1 Term. This Agreement is effective as of the Delivery of the Software and expires at such time as all license and service subscriptions hereunder have expired in accordance with their own terms (the “Term”). For clarification, the term of your license under this Agreement may be perpetual, limited for Evaluation Version, or designated as a fixed-term license in the Invoice, and shall be specified at your time of purchase. Either party may terminate this Agreement (including all related Invoices) if the other party: (a) fails to cure any material breach of this Agreement within thirty (30) days after written notice of such breach, provided that Replay Software may terminate this Agreement immediately upon any breach of Section 3 or if you exceed any other restrictions contained in Section 1, unless otherwise specified in this agreement; (b) ceases operation without a successor; or (c) seeks protection under any bankruptcy, receivership, trust deed, creditors arrangement, composition or comparable proceeding, or if any such proceeding is instituted against such party (and not dismissed within sixty (60) days)). Termination is not an exclusive remedy and the exercise by either party of any remedy under this Agreement will be without prejudice to any other remedies it may have under this Agreement, by law, or otherwise.        
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+7.3 Expiration of License. Upon the expiration of any term under this Agreement, (a) all Software updates and services pursuant to the license shall cease, (b) you may only continue to run existing installations of the Software, (c) you may not install the Software on any additional Hosts, and (d) any new installation of the Software shall require the purchase of a new license subscription from Replay Software.
+
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+To the maximum extent permitted by applicable law, Replay Software disclaims all warranties, express, implied, arising by law or otherwise, regarding the Software, the Software content and their respective performance or suitability for your intended use, including without limitation any implied warranty of merchantability, fitness for a particular purpose.
+
+9. Limitation of Liability. 
+
+In no event will Replay Software be liable for any direct, indirect, consequential, incidental, special, exemplary, or punitive damages or liabilities whatsoever arising from or relating to the Software, the Software content or this Agreement, whether based on contract, tort (including negligence), strict liability or other theory, even if Replay Software has been advised of the possibility of such damages.
+
+In no event will Replay Software' liability exceed the Software license price as indicated in the invoice. The existence of more than one claim will not enlarge or extend this limit.
+
+10. Remedies. Your exclusive remedy and Replay Software’ entire liability for breach of this Agreement shall be limited, at Replay Software’ sole and exclusive discretion, to (a) replacement of any defective software or documentation; or (b) refund of the license fee paid to Replay Software, payable in accordance with Replay Software' refund policy.
+
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+
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+
+11.3 Government End Users. If the Software and related documentation are supplied to or purchased by or on behalf of the United States Government, then the Software is deemed to be "commercial software" as that term is used in the Federal Acquisition Regulation system. Rights of the United States shall not exceed the minimum rights set forth in FAR 52.227-19 for "restricted computer software". All other terms and conditions of this Agreement apply.
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+12. Third Party Software.  Examples included in Software may provide links to third party libraries or code (collectively “Third Party Software”) to implement various functions. Third Party Software does not comprise part of the Software. In some cases, access to Third Party Software may be included along with the Software delivery as a convenience for demonstration purposes. Such source code and libraries may be included in the “…/examples” source tree delivered with the Software and do not comprise the Software. Licensee acknowledges (1) that some part of Third Party Software may require additional licensing of copyright and patents from the owners of such, and (2) that distribution of any of the Software referencing or including any portion of a Third Party Software may require appropriate licensing from such third parties.
+
+
+13. Miscellaneous
+
+13.1 Entire Agreement. This Agreement sets forth our entire agreement with respect to the Software and the subject matter hereof and supersedes all prior and contemporaneous understandings and agreements whether written or oral.
+
+13.2 Amendment. Replay Software reserves the right, in its sole discretion, to amend this Agreement from time. Amendments to this Agreement can be located at: https://github.com/buger/gor/blob/master/COMM-LICENSE.
+
+13.3 Assignment. You may not assign this Agreement or any of its rights under this Agreement without the prior written consent of Replay Software and any attempted assignment without such consent shall be void.
+
+13.4 Export Compliance. You agree to comply with all applicable laws and regulations, including laws, regulations, orders or other restrictions on export, re-export or redistribution of software.
+
+13.5 Indemnification. You agree to defend, indemnify, and hold harmless Replay Software from and against any lawsuits, claims, losses, damages, fines and expenses (including attorneys' fees and costs) arising out of your use of the Software or breach of this Agreement.
+
+13.6 Governing Law. This Agreement is governed by the laws of the State of Oregon and the United States without regard to conflicts of laws provisions thereof, and without regard to the United Nations Convention on the International Sale of Goods or the Uniform Computer Information Transactions Act, as currently enacted by any jurisdiction or as may be codified or amended from time to time by any jurisdiction. The jurisdiction and venue for actions related to the subject matter hereof shall be the state of Oregon and United States federal courts located in Portland, Oregon, and both parties hereby submit to the personal jurisdiction of such courts. 
+
+13.7 Attorneys’ Fees and Costs. The prevailing party in any action to enforce this Agreement will be entitled to recover its attorneys’ fees and costs in connection with such action. 
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+13.8 Severability. If any provision of this Agreement is held by a court of competent jurisdiction to be invalid, illegal, or unenforceable, the remainder of this Agreement will remain in full force and effect.
+
+13.9 Waiver. Failure or neglect by either party to enforce at any time any of the provisions of this licence Agreement shall not be construed or deemed to be a waiver of that party's rights under this Agreement.
+
+13.10 Headings. The headings of sections and paragraphs of this Agreement are for convenience of reference only and are not intended to restrict, affect or be of any weight in the interpretation or construction of the provisions of such sections or paragraphs.
+
+14. Contact Information. If you have any questions about this EULA, or if you want to contact Replay Software for any reason, please direct correspondence to info@gortool.com

Dockerfile

@@ -10,13 +10,12 @@ RUN apt-get update -y
 RUN echo oracle-java7-installer shared/accepted-oracle-license-v1-1 select true | /usr/bin/debconf-set-selections
 RUN apt-get install oracle-java8-installer -y
 
-RUN wget http://apache-mirror.rbc.ru/pub/apache//commons/io/binaries/commons-io-2.4-bin.tar.gz -P /tmp
-RUN tar xzf /tmp/commons-io-2.4-bin.tar.gz -C /tmp
+RUN apt-get install libpcap-dev -y
+RUN go get github.com/google/gopacket
+RUN go get -u github.com/golang/lint/golint
 
 WORKDIR /go/src/github.com/buger/gor/
 ADD . /go/src/github.com/buger/gor/
 
 RUN javac -cp /tmp/commons-io-2.4/commons-io-2.4.jar ./examples/middleware/echo.java
-
-RUN go get -u github.com/golang/lint/golint
 RUN go get

LICENSE.txt

@@ -1,191 +1,7 @@
-Apache License
-Version 2.0, January 2004
-http://www.apache.org/licenses/
+Gor is an Open Source project licensed under the terms of
+the LGPLv3 license.  Please see <http://www.gnu.org/licenses/lgpl-3.0.html>
+for license text.
 
-TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
-
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-   you may not use this file except in compliance with the License.
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-     http://www.apache.org/licenses/LICENSE-2.0
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-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
+Gor Pro has a commercial-friendly license allowing private forks
+and modifications of Gor.  Please see http://gortool.com/#pro for
+more detail.  You can find the commercial license terms in COMM-LICENSE.

Makefile

@@ -1,14 +1,16 @@
 SOURCE = emitter.go gor.go gor_stat.go input_dummy.go input_file.go input_raw.go input_tcp.go limiter.go output_dummy.go output_file.go input_http.go output_http.go output_tcp.go plugins.go settings.go test_input.go elasticsearch.go http_modifier.go http_modifier_settings.go http_client.go middleware.go protocol.go
 SOURCE_PATH = /go/src/github.com/buger/gor/
 RUN = docker run -v `pwd`:$(SOURCE_PATH) -p 0.0.0.0:8000:8000 -t -i gor
+BENCHMARK = BenchmarkRAWInput
+TEST = TestRawListenerBench
 
-release: release-x86 release-x64
+release: release-x64
 
 release-x64:
-	docker run -v `pwd`:$(SOURCE_PATH) -t --env GOOS=linux --env GOARCH=amd64 --env CGO_ENABLED=0 -i gor go build -ldflags "-X main.VERSION=$(VERSION)"&& tar -czf gor_$(VERSION)_x64.tar.gz gor && rm gor
+	docker run -v `pwd`:$(SOURCE_PATH) -t --env GOOS=linux --env GOARCH=amd64  -i gor go build -ldflags "-X main.VERSION=$(VERSION) -extldflags \"-static\"" && tar -czf gor_$(VERSION)_x64.tar.gz gor && rm gor
 
 release-x86:
-	docker run -v `pwd`:$(SOURCE_PATH) -t --env GOOS=linux --env GOARCH=386 --env CGO_ENABLED=0 -i gor go build -ldflags "-X main.VERSION=$(VERSION)" && tar -czf gor_$(VERSION)_x86.tar.gz gor && rm gor
+	docker run -v `pwd`:$(SOURCE_PATH) -t --env GOOS=linux --env GOARCH=386 -i gor go build -ldflags "-X main.VERSION=$(VERSION)" && tar -czf gor_$(VERSION)_x86.tar.gz gor && rm gor
 
 build:
 	docker build -t gor .
@@ -24,7 +26,10 @@ race:
 	$(RUN) go test ./... $(ARGS) -v -race -timeout 15s
 
 test:
-	$(RUN) go test ./... -timeout 10s $(ARGS) -v
+	$(RUN) go test ./. -timeout 30s $(ARGS) -v
+
+test_all:
+	$(RUN) go test ./... -timeout 30s $(ARGS) -v
 
 testone:
 	$(RUN) go test ./... -timeout 4s -run $(TEST) $(ARGS) -v
@@ -40,7 +45,11 @@ vet:
 	$(RUN) go vet
 
 bench:
-	$(RUN) go test -v -run NOT_EXISTING -bench HTTP
+	$(RUN) go test -v -run NOT_EXISTING -bench $(BENCHMARK) -benchtime 5s
+
+profile_test:
+	$(RUN) go test $(LDFLAGS) -run $(TEST) ./raw_socket_listener/. $(ARGS) -memprofile mem.mprof -cpuprofile cpu.out
+	$(RUN) go test $(LDFLAGS) -run $(TEST) ./raw_socket_listener/. $(ARGS) -c
 
 # Used mainly for debugging, because docker container do not have access to parent machine ports
 run:

README.md

@@ -1,4 +1,4 @@
-[![Build Status](https://travis-ci.org/buger/gor.png?branch=master)](https://travis-ci.org/buger/gor) [![codebeat](https://codebeat.co/badges/6427d589-a78e-416c-a546-d299b4089893)](https://codebeat.co/projects/github-com-buger-gor) [![Go Report Card](https://goreportcard.com/badge/github.com/buger/gor)](https://goreportcard.com/report/github.com/buger/gor)
+[![GitHub release](https://img.shields.io/github/release/buger/gor.svg?maxAge=3600)](https://github.com/buger/gor/releases) [![codebeat](https://codebeat.co/badges/6427d589-a78e-416c-a546-d299b4089893)](https://codebeat.co/projects/github-com-buger-gor) [![Go Report Card](https://goreportcard.com/badge/github.com/buger/gor)](https://goreportcard.com/report/github.com/buger/gor) [![Join the chat at https://gitter.im/buger/gor](https://badges.gitter.im/buger/gor.svg)](https://gitter.im/buger/gor?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
 ## About
 
@@ -14,12 +14,19 @@ Here is basic workflow: The listener server catches http traffic and sends it to
 ![Diagram](http://i.imgur.com/9mqj2SK.png)
 
 
+## Want to Upgrade?
+
+I also sell Gor Pro, extensions to Gor which provide more features, a commercial-friendly license and allow you to support high quality open source development all at the same time. Please see the Gor [homepage](https://gortool.com/) for more detail.
+
+Subscribe to the [quarterly newsletter](https://tinyletter.com/gor) to stay informed about the latest features and changes to Gor and its bigger siblings.
+
+
 ## Examples
 
 ### Capture traffic from port
 ```bash
 # Run on servers where you want to catch traffic. You can run it on each `web` machine.
-sudo gor --input-raw :80 --output-tcp replay.local:28020
+sudo gor --input-raw 127.0.0.1:80 --output-tcp replay.local:28020
 
 # Replay server (replay.local).
 gor --input-tcp replay.local:28020 --output-http http://staging.com
@@ -31,18 +38,9 @@ Since Gor use raw sockets to capture traffic it require `sudo` access. Alternati
 It's recommended to use separate server for replaying traffic, but if you have enough CPU resources you can use single Gor instance.
 
 ```
-sudo gor --input-raw :80 --output-http "http://staging.com"
+sudo gor --input-raw 127.0.0.1:80 --output-http "http://staging.com"
 ```
 
-### Guarantee of replay and HTTP input
-Due to how traffic interception works, there is chance of missing requests. If you want guarantee that requests will be replayed you can use http input, but it will require changes in your app as well. 
-
-```
-sudo gor --input-http :28019 --output-http "http://staging.com"
-```
-
-Then in your application you should send copy (e.g. like reverse proxy) all incoming requests to Gor http input. 
-
 ## Configuration
 
 ### Forward to multiple addresses
@@ -100,7 +98,7 @@ gor --input-tcp :28020 --output-http "http://staging.com|10"
 ```
 # replay server will not get more than 10% of requests 
 # useful for high-load environments
-gor --input-raw :80 --output-tcp "replay.local:28020|10%"
+gor --input-raw 127.0.0.1:80 --output-tcp "replay.local:28020|10%"
 ```
 
 #### Limiting based on Header or URL param value
@@ -108,10 +106,10 @@ If you have unique user id (like API key) stored in header or URL you can consis
 Basic formula looks like this: `FNV32-1A_hashing(value) % 100 >= chance`. Examples:
 ```
 # Limit based on header value
-gor --input-raw :80 --output-tcp "replay.local:28020|10%" --http-header-limiter "X-API-KEY: 10%"
+gor --input-raw 127.0.0.1:80 --output-tcp "replay.local:28020|10%" --http-header-limiter "X-API-KEY: 10%"
 
 # Limit based on header value
-gor --input-raw :80 --output-tcp "replay.local:28020|10%" --http-param-limiter "api_key: 10%"
+gor --input-raw 127.0.0.1:80 --output-tcp "replay.local:28020|10%" --http-param-limiter "api_key: 10%"
 ```
 Only percentage based limiting supported.
 
@@ -120,29 +118,29 @@ Only percentage based limiting supported.
 #### Allow url regexp
 ```
 # only forward requests being sent to the /api endpoint
-gor --input-raw :8080 --output-http staging.com --http-allow-url /api
+gor --input-raw 127.0.0.1:8080 --output-http staging.com --http-allow-url /api
 ```
 
 #### Disallow url regexp
 ```
 # only forward requests NOT being sent to the /api... endpoint
-gor --input-raw :8080 --output-http staging.com --http-disallow-url /api
+gor --input-raw 127.0.0.1:8080 --output-http staging.com --http-disallow-url /api
 ```
 #### Filter based on regexp of header
 
 ```
 # only forward requests with an api version of 1.0x
-gor --input-raw :8080 --output-http staging.com --http-allow-header api-version:^1\.0\d
+gor --input-raw 127.0.0.1:8080 --output-http staging.com --http-allow-header api-version:^1\.0\d
 
 # only forward requests NOT containing User-Agent header value "Replayed by Gor"
-gor --input-raw :8080 --output-http staging.com --http-disallow-header "User-Agent: Replayed by Gor"
+gor --input-raw 127.0.0.1:8080 --output-http staging.com --http-disallow-header "User-Agent: Replayed by Gor"
 ```
 
 #### Filter based on http method
 Requests not matching a specified whitelist can be filtered out. For example to strip non-nullipotent requests:
 
 ```
-gor --input-raw :80 --output-http "http://staging.server" \
+gor --input-raw 127.0.0.1:80 --output-http "http://staging.server" \
     --http-allow-method GET \
     --http-allow-method OPTIONS
 ```
@@ -153,20 +151,20 @@ Gor supports some basic request rewriting support. For complex logic you can use
 #### Rewrite URL based on a mapping
 ```
 # rewrite url to match the following
-gor --input-raw :8080 --output-http staging.com --http-rewrite-url /v1/user/([^\\/]+)/ping:/v2/user/$1/ping
+gor --input-raw 127.0.0.1:8080 --output-http staging.com --http-rewrite-url /v1/user/([^\\/]+)/ping:/v2/user/$1/ping
 ```
 
 #### Set URL param
 Set request url param, if param already exists it will be overwritten
 ```
-gor --input-raw :8080 --output-http staging.com --http-set-param api_key=1
+gor --input-raw 127.0.0.1:8080 --output-http staging.com --http-set-param api_key=1
 ```
 
 #### Set Header
 Set request header, if header already exists it will be overwritten. This may be useful if you need to identify requests generated by Gor or enable feature flagged functionality in an application:
 
 ```
-gor --input-raw :80 --output-http "http://staging.server" \
+gor --input-raw 127.0.0.1:80 --output-http "http://staging.server" \
     --http-header "User-Agent: Replayed by Gor" \
     --http-header "Enable-Feature-X: true"
 ```
@@ -206,7 +204,7 @@ end
 
 Middleware can be enabled using `--middleware` option, by specifying path to executable file:
 ```
-gor --input-raw :80 --middleware "/opt/middleware_executable" --output-http "http://staging.server"
+gor --input-raw 127.0.0.1:80 --middleware "/opt/middleware_executable" --output-http "http://staging.server"
 ```
 
 #### Communication protocol
@@ -248,7 +246,7 @@ Imagine that you have auth system that randomly generate access tokens, which us
 You can save requests to file, and replay them later:
 ```
 # write to file
-gor --input-raw :80 --output-file requests.gor
+gor --input-raw 127.0.0.1:80 --output-file requests.gor
 
 # read from file
 gor --input-file requests.gor --output-http "http://staging.com"
@@ -270,11 +268,18 @@ gor --input-file "requests.gor|200%" --output-http "staging.com"
 If your development or staging environment is protected by Basic Authentication then those credentials can be injected in during the replay:
 
 ```
-gor --input-raw :80 --output-http "http://user:pass@staging .com"
+gor --input-raw 127.0.0.1:80 --output-http "http://user:pass@staging .com"
 ```
 
 Note: This will overwrite any Authorization headers in the original request.
 
+### Traffic interception engine
+By default Gor use `libpcap` for intercepting traffic. If you have any troubles with it, you may try alternative engine: `raw_socket`.
+
+```
+sudo gor --input-raw 127.0.0.1:80 --input-raw-engine "libpcap" --output-http "http://staging.com"
+```
+
 
 ## Stats 
 
@@ -340,53 +345,53 @@ https://github.com/buger/gor/releases
 `gor -h` output:
 ```
   -http-allow-header=[]: A regexp to match a specific header against. Requests with non-matching headers will be dropped:
-   gor --input-raw :8080 --output-http staging.com --http-allow-header api-version:^v1
+   gor --input-raw 127.0.0.1:8080 --output-http staging.com --http-allow-header api-version:^v1
   -http-disallow-header=[]: A regexp to match a specific header against. Requests with matching headers will be dropped:
-   gor --input-raw :8080 --output-http staging.com --http-disallow-header "User-Agent: Replayed by Gor"
+   gor --input-raw 127.0.0.1:8080 --output-http staging.com --http-disallow-header "User-Agent: Replayed by Gor"
   -http-allow-method=[]: Whitelist of HTTP methods to replay. Anything else will be dropped:
-  gor --input-raw :8080 --output-http staging.com --http-allow-method GET --http-allow-method OPTIONS
+  gor --input-raw 127.0.0.1:8080 --output-http staging.com --http-allow-method GET --http-allow-method OPTIONS
   -http-allow-url=[]: A regexp to match requests against. Filter get matched agains full url with domain. Anything else will be dropped:
-   gor --input-raw :8080 --output-http staging.com --http-allow-url ^www.
+   gor --input-raw 127.0.0.1:8080 --output-http staging.com --http-allow-url ^www.
   -http-disallow-url=[]: A regexp to match requests against. Filter get matched agains full url with domain. Anything else will be forwarded:
-   gor --input-raw :8080 --output-http staging.com --http-disallow-url ^www.
+   gor --input-raw 127.0.0.1:8080 --output-http staging.com --http-disallow-url ^www.
   -http-header-limiter=[]: Takes a fraction of requests, consistently taking or rejecting a request based on the FNV32-1A hash of a specific header:
-   gor --input-raw :8080 --output-http staging.com --http-header-imiter user-id:25%
+   gor --input-raw 127.0.0.1:8080 --output-http staging.com --http-header-imiter user-id:25%
   -http-param-limiter=[]: Takes a fraction of requests, consistently taking or rejecting a request based on the FNV32-1A hash of a specific GET param:
-   gor --input-raw :8080 --output-http staging.com --http-param-limiter user_id:25%
+   gor --input-raw 127.0.0.1:8080 --output-http staging.com --http-param-limiter user_id:25%
   -http-rewrite-url=[]: Rewrite the request url based on a mapping:
-  gor --input-raw :8080 --output-http staging.com --http-rewrite-url /v1/user/([^\/]+)/ping:/v2/user/$1/ping
+  gor --input-raw 127.0.0.1:8080 --output-http staging.com --http-rewrite-url /v1/user/([^\/]+)/ping:/v2/user/$1/ping
   -http-set-header=[]: Inject additional headers to http reqest:
-  gor --input-raw :8080 --output-http staging.com --http-set-header 'User-Agent: Gor'
+  gor --input-raw 127.0.0.1:8080 --output-http staging.com --http-set-header 'User-Agent: Gor'
   -http-set-param=[]: Set request url param, if param already exists it will be overwritten:
-  gor --input-raw :8080 --output-http staging.com --http-set-param api_key=1
+  gor --input-raw 127.0.0.1:8080 --output-http staging.com --http-set-param api_key=1
   -input-dummy=[]: Used for testing outputs. Emits 'Get /' request every 1s
   -input-file=[]: Read requests from file:
   gor --input-file ./requests.gor --output-http staging.com
   -input-http=[]: Read requests from HTTP, should be explicitly sent from your application:
   # Listen for http on 9000
-  gor --input-http :9000 --output-http staging.com
+  gor --input-http 127.0.0.1:9000 --output-http staging.com
   -input-raw=[]: Capture traffic from given port (use RAW sockets and require *sudo* access):
   # Capture traffic from 8080 port
-  gor --input-raw :8080 --output-http staging.com
+  gor --input-raw 127.0.0.1:8080 --output-http staging.com
   -input-tcp=[]: Used for internal communication between Gor instances. Example:
   # Receive requests from other Gor instances on 28020 port, and redirect output to staging
   gor --input-tcp :28020 --output-http staging.com
   -memprofile="": write memory profile to this file
   -output-dummy=[]: Used for testing inputs. Just prints data coming from inputs.
   -output-file=[]: Write incoming requests to file:
-  gor --input-raw :80 --output-file ./requests.gor
+  gor --input-raw 127.0.0.1:80 --output-file ./requests.gor
   -output-http=[]: Forwards incoming requests to given http address.
   # Redirect all incoming requests to staging.com address
-  gor --input-raw :80 --output-http http://staging.com
+  gor --input-raw 127.0.0.1:80 --output-http http://staging.com
   -output-http-elasticsearch="": Send request and response stats to ElasticSearch:
-  gor --input-raw :8080 --output-http staging.com --output-http-elasticsearch 'es_host:api_port/index_name'
+  gor --input-raw 127.0.0.1:8080 --output-http staging.com --output-http-elasticsearch 'es_host:api_port/index_name'
   -output-http-header-filter=[]: WARNING: `--output-http-header-filter` DEPRECATED, use `--http-allow-header` instead
   -output-http-redirects=0: Enable how often redirects should be followed.
   -output-http-stats=false: Report http output queue stats to console every 5 seconds. Remember to include also `--stats`
   -output-http-workers=0: Gor uses dynamic worker scaling by default.  Enter a number to run a set number of workers.
   -output-tcp=[]: Used for internal communication between Gor instances. Example:
   # Listen for requests on 80 port and forward them to other Gor instance on 28020 port
-  gor --input-raw :80 --output-tcp replay.local:28020
+  gor --input-raw 127.0.0.1:80 --output-tcp replay.local:28020
   -output-tcp-stats=false: Report TCP output queue stats to console every 5 seconds. Remember to include also `--stats`
   -split-output=false: By default each output gets same traffic. If set to `true` it splits traffic equally among all outputs.
   -stats=false: Turn on queue stats output. Use in combination with the other *-stats flags.
@@ -478,11 +483,15 @@ To achieve the top most performance you should tune the source server system lim
 
 ## Companies using Gor
 
-* [Granify](http://granify.com)
-* [GOV.UK](https://www.gov.uk) ([Government Digital Service](http://digital.cabinetoffice.gov.uk/))
-* [theguardian.com](http://theguardian.com)
-* [TomTom](http://www.tomtom.com/)
-* [3SCALE](http://www.3scale.net/)
-* [Optionlab](http://www.opinionlab.com)
-* [TubeMogul] (http://tubemogul.com)
-* To add your company drop me a line to github.com/buger or leonsbox@gmail.com
+* [GOV.UK](https://www.gov.uk) - UK Government Digital Service
+* [theguardian.com](http://theguardian.com) - Most popular online newspaper in the UK
+* [TomTom](http://www.tomtom.com/) - Global leader in navigation, traffic and map products, GPS Sport Watches and fleet management solutions.
+* [3SCALE](http://www.3scale.net/) - API infrastructure to manage your APIs for internal or external users
+* [Optionlab](http://www.opinionlab.com) - Optimize customer experience and drive engagement across multiple channels
+* [TubeMogul](http://tubemogul.com) - Software for Brand Advertising
+* [Videology](http://www.videologygroup.com/) - Video advertising platform
+* [ForeksMobile](http://foreksmobile.com/) -  One of the leading financial application development company in Turkey
+* [Granify](http://granify.com) - AI backed SaaS solution that enables online retailers to maximise their sales
+* And many more!
+
+If you are using Gor we are happy add you to the list and share your story, just write to: leonsbox@gmail.com

circle.yml

@@ -0,0 +1,7 @@
+dependencies:
+  pre:
+    - sudo apt-get install libpcap-dev -y
+
+test:
+  override:
+    - sudo bash -l -c "export GOPATH='/home/ubuntu/.go_workspace:/usr/local/go_workspace:/home/ubuntu/.go_project' && GORACE='halt_on_error=1' /usr/local/go/bin/go test ./... -v -timeout 120s -race"

examples/middleware/echo.java

@@ -2,8 +2,6 @@ import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStreamReader;
 
-import org.apache.commons.io.IOUtils;
-
 public class echo {
     public static void main(String[] args) {
         if(args != null){
@@ -24,7 +22,6 @@ public class echo {
 
             }
         } catch (IOException e) {
-            IOUtils.closeQuietly(stdin);
         }
     }
 }

examples/middleware/token_modifier.go

@@ -45,7 +45,7 @@ func main() {
 		buf := make([]byte, len(encoded)/2)
 		hex.Decode(buf, encoded)
 
-		go process(buf)
+		process(buf)
 	}
 }
 

http_client.go

@@ -8,7 +8,9 @@ import (
 	"net"
 	"net/url"
 	"runtime/debug"
+	"strconv"
 	"strings"
+	"syscall"
 	"time"
 )
 
@@ -101,7 +103,14 @@ func (c *HTTPClient) isAlive() bool {
 
 	// Ready 1 byte from socket without timeout to check if it not closed
 	c.conn.SetReadDeadline(time.Now().Add(time.Millisecond))
-	if _, err := c.conn.Read(one); err == io.EOF {
+	_, err := c.conn.Read(one)
+
+	if err == nil {
+		return true
+	} else if err == io.EOF {
+		return false
+	} else if err == syscall.EPIPE {
+		Debug("Detected broken pipe.", err)
 		return false
 	}
 
@@ -202,6 +211,14 @@ func (c *HTTPClient) Get(path string) (response []byte, err error) {
 	return c.Send([]byte(payload))
 }
 
+func (c *HTTPClient) Post(path string, body []byte) (response []byte, err error) {
+	payload := "POST " + path + " HTTP/1.1\r\n"
+	payload += "Content-Length: " + strconv.Itoa(len(body)) + "\r\n\r\n"
+	payload += string(body)
+
+	return c.Send([]byte(payload))
+}
+
 const (
 	// https://support.cloudflare.com/hc/en-us/articles/200171936-Error-520-Web-server-is-returning-an-unknown-error
 	HTTP_UNKNOWN_ERROR = "520"

input_dummy.go

@@ -35,7 +35,7 @@ func (i *DummyInput) emit() {
 		case <-ticker.C:
 			uuid := uuid()
 			reqh := payloadHeader(RequestPayload, uuid, time.Now().UnixNano())
-			i.data <- append(reqh, []byte("POST /pub/WWW/å HTTP/1.1\r\nHost: www.w3.org\r\nUser-Agent: Go 1.1 package http\r\nAccept-Encoding: gzip\r\nContent-Length: 7\r\n\r\na=1&b=2")...)
+			i.data <- append(reqh, []byte("GET /HTTP/1.1\r\nHost: www.w3.org\r\nUser-Agent: Go 1.1 package http\r\nAccept-Encoding: gzip\r\n\r\n")...)
 
 			resh := payloadHeader(ResponsePayload, uuid, 1)
 			i.data <- append(resh, []byte("HTTP/1.1 200 OK\r\nContent-Length: 0\r\n\r\n")...)

input_file.go

@@ -2,6 +2,8 @@ package main
 
 import (
 	"bufio"
+	"bytes"
+	"io"
 	"log"
 	"os"
 	"strconv"
@@ -53,36 +55,53 @@ func (i *FileInput) String() string {
 func (i *FileInput) emit() {
 	var lastTime int64
 
-	// reader := bufio.NewReader(conn)
-	scanner := bufio.NewScanner(i.file)
-	scanner.Split(payloadScanner)
+	payloadSeparatorAsBytes := []byte(payloadSeparator)
+	reader := bufio.NewReader(i.file)
+	var buffer bytes.Buffer
 
-	for scanner.Scan() {
-		buf := scanner.Bytes()
-		meta := payloadMeta(buf)
+	for {
+		line, err := reader.ReadBytes('\n')
 
-		if len(meta) > 2 && meta[0][0] == RequestPayload {
-			ts, _ := strconv.ParseInt(string(meta[2]), 10, 64)
-
-			if lastTime != 0 {
-				timeDiff := ts - lastTime
-
-				if i.speedFactor != 1 {
-					timeDiff = int64(float64(timeDiff) / i.speedFactor)
-				}
-
-				time.Sleep(time.Duration(timeDiff))
+		if err != nil {
+			if err != io.EOF {
+				log.Fatal(err)
 			}
+			break
 
-			lastTime = ts
 		}
 
-		// scanner returs only pointer, so to remove data-race we have to allocate new array
-		newBuf := make([]byte, len(buf))
-		copy(newBuf, buf)
+		if bytes.Equal(payloadSeparatorAsBytes[1:], line) {
+			asBytes := buffer.Bytes()[:buffer.Len()-1]
+			buffer.Reset()
+
+			meta := payloadMeta(asBytes)
+
+			if len(meta) > 2 && meta[0][0] == RequestPayload {
+				ts, _ := strconv.ParseInt(string(meta[2]), 10, 64)
+
+				if lastTime != 0 {
+					timeDiff := ts - lastTime
+
+					if i.speedFactor != 1 {
+						timeDiff = int64(float64(timeDiff) / i.speedFactor)
+					}
+
+					time.Sleep(time.Duration(timeDiff))
+				}
+
+				lastTime = ts
+			}
+
+			// Bytes() returns only pointer, so to remove data-race copy the data to an array
+			newBuf := make([]byte, len(asBytes))
+			copy(newBuf, asBytes)
+
+			i.data <- newBuf
+		} else {
+			buffer.Write(line)
+		}
 
-		i.data <- newBuf
 	}
 
-	log.Println("FileInput: end of file")
+	log.Printf("FileInput: end of file '%s'\n", i.path)
 }

input_file_test.go

@@ -0,0 +1,220 @@
+package main
+
+import (
+	"bytes"
+	"errors"
+	"io"
+	"io/ioutil"
+	"os"
+	"sync"
+	"syscall"
+	"testing"
+	"time"
+)
+
+func TestInputFileWithGET(t *testing.T) {
+
+	input := NewTestInput()
+	rg := NewRequestGenerator([]io.Reader{input}, func() { input.EmitGET() }, 1)
+	readPayloads := [][]byte{}
+
+	// Given a capture file with a GET request
+	expectedCaptureFile := CreateCaptureFile(rg)
+	defer expectedCaptureFile.TearDown()
+
+	// When the request is read from the capture file
+	err := ReadFromCaptureFile(expectedCaptureFile.file, 1, func(data []byte) {
+		readPayloads = append(readPayloads, Duplicate(data))
+	})
+
+	// The read request should match the original request
+	if err != nil {
+		t.Error(err)
+	} else {
+		if !expectedCaptureFile.PayloadsEqual(readPayloads) {
+			t.Error("Request read back from file should match")
+		}
+	}
+
+}
+
+func TestInputFileWithPayloadLargerThan64Kb(t *testing.T) {
+
+	input := NewTestInput()
+	rg := NewRequestGenerator([]io.Reader{input}, func() { input.EmitSizedPOST(64 * 1024) }, 1)
+	readPayloads := [][]byte{}
+
+	// Given a capture file with a request over 64Kb
+	expectedCaptureFile := CreateCaptureFile(rg)
+	defer expectedCaptureFile.TearDown()
+
+	// When the request is read from the capture file
+	err := ReadFromCaptureFile(expectedCaptureFile.file, 1, func(data []byte) {
+		readPayloads = append(readPayloads, Duplicate(data))
+	})
+
+	// The read request should match the original request
+	if err != nil {
+		t.Error(err)
+	} else {
+		if !expectedCaptureFile.PayloadsEqual(readPayloads) {
+			t.Error("Request read back from file should match")
+		}
+	}
+
+}
+
+func TestInputFileWithGETAndPOST(t *testing.T) {
+
+	input := NewTestInput()
+	rg := NewRequestGenerator([]io.Reader{input}, func() {
+		input.EmitGET()
+		input.EmitPOST()
+	}, 2)
+	readPayloads := [][]byte{}
+
+	// Given a capture file with a GET request
+	expectedCaptureFile := CreateCaptureFile(rg)
+	defer expectedCaptureFile.TearDown()
+
+	// When the requests are read from the capture file
+	err := ReadFromCaptureFile(expectedCaptureFile.file, 2, func(data []byte) {
+		readPayloads = append(readPayloads, Duplicate(data))
+	})
+
+	// The read requests should match the original request
+	if err != nil {
+		t.Error(err)
+	} else {
+		if !expectedCaptureFile.PayloadsEqual(readPayloads) {
+			t.Error("Request read back from file should match")
+		}
+	}
+
+}
+
+type CaptureFile struct {
+	data [][]byte
+	file *os.File
+}
+
+func NewExpectedCaptureFile(data [][]byte, file *os.File) *CaptureFile {
+	ecf := new(CaptureFile)
+	ecf.file = file
+	ecf.data = data
+	return ecf
+}
+
+func (expectedCaptureFile *CaptureFile) TearDown() {
+	if expectedCaptureFile.file != nil {
+		syscall.Unlink(expectedCaptureFile.file.Name())
+	}
+}
+
+type RequestGenerator struct {
+	inputs []io.Reader
+	emit   func()
+	wg     *sync.WaitGroup
+}
+
+func NewRequestGenerator(inputs []io.Reader, emit func(), count int) (rg *RequestGenerator) {
+	rg = new(RequestGenerator)
+	rg.inputs = inputs
+	rg.emit = emit
+	rg.wg = new(sync.WaitGroup)
+	rg.wg.Add(count)
+	return
+}
+
+func (expectedCaptureFile *CaptureFile) PayloadsEqual(other [][]byte) bool {
+
+	if len(expectedCaptureFile.data) != len(other) {
+		return false
+	}
+
+	for i, payload := range other {
+
+		if !bytes.Equal(expectedCaptureFile.data[i], payload) {
+			return false
+		}
+
+	}
+
+	return true
+
+}
+
+func CreateCaptureFile(requestGenerator *RequestGenerator) *CaptureFile {
+
+	f, err := ioutil.TempFile("", "testmainconf")
+	if err != nil {
+		panic(err)
+	}
+
+	quit := make(chan int)
+
+	readPayloads := [][]byte{}
+	output := NewTestOutput(func(data []byte) {
+
+		readPayloads = append(readPayloads, Duplicate(data))
+
+		requestGenerator.wg.Done()
+	})
+
+	outputFile := NewFileOutput(f.Name())
+
+	Plugins.Inputs = requestGenerator.inputs
+	Plugins.Outputs = []io.Writer{output, outputFile}
+
+	go Start(quit)
+
+	requestGenerator.emit()
+	requestGenerator.wg.Wait()
+
+	close(quit)
+
+	return NewExpectedCaptureFile(readPayloads, f)
+
+}
+
+func ReadFromCaptureFile(captureFile *os.File, count int, callback writeCallback) (err error) {
+
+	quit := make(chan int)
+	wg := new(sync.WaitGroup)
+
+	input := NewFileInput(captureFile.Name())
+	output := NewTestOutput(func(data []byte) {
+		callback(data)
+		wg.Done()
+	})
+
+	Plugins.Inputs = []io.Reader{input}
+	Plugins.Outputs = []io.Writer{output}
+
+	wg.Add(count)
+	go Start(quit)
+
+	done := make(chan int, 1)
+	go func() {
+		wg.Wait()
+		done <- 1
+	}()
+
+	select {
+	case <-done:
+		break
+	case <-time.After(2 * time.Second):
+		err = errors.New("Timed out")
+	}
+	close(quit)
+
+	return
+
+}
+
+func Duplicate(data []byte) (duplicate []byte) {
+	duplicate = make([]byte, len(data))
+	copy(duplicate, data)
+
+	return
+}

input_raw.go

@@ -14,19 +14,32 @@ type RAWInput struct {
 	address  string
 	expire   time.Duration
 	quit     chan bool
+	engine   int
 	listener *raw.Listener
 }
 
+// Available engines for intercepting traffic
+const (
+	EngineRawSocket = 1 << iota
+	EnginePcap
+)
+
 // NewRAWInput constructor for RAWInput. Accepts address with port as argument.
-func NewRAWInput(address string, expire time.Duration) (i *RAWInput) {
+func NewRAWInput(address string, engine int, expire time.Duration) (i *RAWInput) {
 	i = new(RAWInput)
 	i.data = make(chan *raw.TCPMessage)
 	i.address = address
 	i.expire = expire
+	i.engine = engine
 	i.quit = make(chan bool)
 
 	go i.listen(address)
 
+	for i.listener == nil {
+		time.Sleep(time.Millisecond)
+	}
+	i.listener.IsReady()
+
 	return
 }
 
@@ -59,7 +72,9 @@ func (i *RAWInput) listen(address string) {
 		log.Fatal("input-raw: error while parsing address", err)
 	}
 
-	i.listener = raw.NewListener(host, port, i.expire)
+	i.listener = raw.NewListener(host, port, i.engine, i.expire)
+
+	ch := i.listener.Receiver()
 
 	for {
 		select {
@@ -68,15 +83,12 @@ func (i *RAWInput) listen(address string) {
 		default:
 		}
 
-		// Receiving TCPMessage object
-		m := i.listener.Receive()
-
-		i.data <- m
+		i.data <- ch.Read()
 	}
 }
 
 func (i *RAWInput) String() string {
-	return "RAW Socket input: " + i.address
+	return "Intercepting traffic from: " + i.address
 }
 
 func (i *RAWInput) Close() {

input_raw_test.go

@@ -5,11 +5,13 @@ import (
 	"io"
 	"io/ioutil"
 	"log"
+	"math/rand"
 	"net/http"
 	"net/http/httptest"
 	"net/http/httputil"
 	"os"
 	"os/exec"
+	"strconv"
 	"strings"
 	"sync"
 	"sync/atomic"
@@ -29,7 +31,7 @@ func TestRAWInput(t *testing.T) {
 
 	var respCounter, reqCounter int64
 
-	input := NewRAWInput(originAddr, testRawExpire)
+	input := NewRAWInput(originAddr, EnginePcap, testRawExpire)
 	defer input.Close()
 
 	output := NewTestOutput(func(data []byte) {
@@ -51,14 +53,13 @@ func TestRAWInput(t *testing.T) {
 
 	client := NewHTTPClient(origin.URL, &HTTPClientConfig{})
 
-	time.Sleep(time.Millisecond)
-
 	go Start(quit)
 
 	for i := 0; i < 100; i++ {
 		// request + response
 		wg.Add(2)
 		client.Get("/")
+		time.Sleep(2 * time.Millisecond)
 	}
 
 	wg.Wait()
@@ -69,7 +70,7 @@ func TestInputRAW100Expect(t *testing.T) {
 	wg := new(sync.WaitGroup)
 	quit := make(chan int)
 
-	fileContent, _ := ioutil.ReadFile("LICENSE.txt")
+	fileContent, _ := ioutil.ReadFile("COMM-LICENSE")
 
 	// Origing and Replay server initialization
 	origin := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
@@ -81,7 +82,7 @@ func TestInputRAW100Expect(t *testing.T) {
 
 	originAddr := strings.Replace(origin.Listener.Addr().String(), "[::]", "127.0.0.1", -1)
 
-	input := NewRAWInput(originAddr, time.Second)
+	input := NewRAWInput(originAddr, EnginePcap, time.Second)
 	defer input.Close()
 
 	// We will use it to get content of raw HTTP request
@@ -119,7 +120,7 @@ func TestInputRAW100Expect(t *testing.T) {
 
 	// Origin + Response/Request Test Output + Request Http Output
 	wg.Add(4)
-	curl := exec.Command("curl", "http://"+originAddr, "--data-binary", "@LICENSE.txt")
+	curl := exec.Command("curl", "http://"+originAddr, "--data-binary", "@COMM-LICENSE")
 	err := curl.Run()
 	if err != nil {
 		log.Fatal(err)
@@ -144,7 +145,7 @@ func TestInputRAWChunkedEncoding(t *testing.T) {
 	}))
 
 	originAddr := strings.Replace(origin.Listener.Addr().String(), "[::]", "127.0.0.1", -1)
-	input := NewRAWInput(originAddr, time.Second)
+	input := NewRAWInput(originAddr, EnginePcap, time.Second)
 	defer input.Close()
 
 	replay := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
@@ -169,7 +170,7 @@ func TestInputRAWChunkedEncoding(t *testing.T) {
 
 	wg.Add(2)
 
-	curl := exec.Command("curl", "http://"+originAddr, "--header", "Transfer-Encoding: chunked", "--data-binary", "@README.md")
+	curl := exec.Command("curl", "http://"+originAddr, "--header", "Transfer-Encoding: chunked", "--header", "Expect:", "--data-binary", "@README.md")
 	err := curl.Run()
 	if err != nil {
 		log.Fatal(err)
@@ -187,9 +188,10 @@ func TestInputRAWLargePayload(t *testing.T) {
 	}
 	wg := new(sync.WaitGroup)
 	quit := make(chan int)
+	sizeKb := 100
 
 	// Generate 100kb file
-	dd := exec.Command("dd", "if=/dev/urandom", "of=/tmp/large", "bs=1KB", "count=100")
+	dd := exec.Command("dd", "if=/dev/urandom", "of=/tmp/large", "bs=1KB", "count="+strconv.Itoa(sizeKb))
 	err := dd.Run()
 	if err != nil {
 		log.Fatal("dd error:", err)
@@ -199,7 +201,7 @@ func TestInputRAWLargePayload(t *testing.T) {
 		defer req.Body.Close()
 		body, _ := ioutil.ReadAll(req.Body)
 
-		if len(body) != 100*1000 {
+		if len(body) != sizeKb*1000 {
 			t.Error("File size should be 1mb:", len(body))
 		}
 
@@ -207,17 +209,18 @@ func TestInputRAWLargePayload(t *testing.T) {
 	}))
 	originAddr := strings.Replace(origin.Listener.Addr().String(), "[::]", "127.0.0.1", -1)
 
-	input := NewRAWInput(originAddr, time.Second)
+	input := NewRAWInput(originAddr, EnginePcap, testRawExpire)
 	defer input.Close()
 
 	replay := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
-		req.Body = http.MaxBytesReader(w, req.Body, 1*1024*1024)
-		buf := make([]byte, 1*1024*1024)
-		n, _ := req.Body.Read(buf)
-		body := buf[0:n]
+		body, _ := ioutil.ReadAll(req.Body)
+		// // req.Body = http.MaxBytesReader(w, req.Body, 1*1024*1024)
+		// // buf := make([]byte, 1*1024*1024)
+		// n, _ := req.Body.Read(buf)
+		// body := buf[0:n]
 
-		if len(body) != 100*1000 {
-			t.Error("File size should be 100000 bytes:", len(body))
+		if len(body) != sizeKb*1000 {
+			t.Errorf("File size should be %d bytes: %d", sizeKb*1000, len(body))
 		}
 
 		wg.Done()
@@ -232,7 +235,7 @@ func TestInputRAWLargePayload(t *testing.T) {
 	go Start(quit)
 
 	wg.Add(2)
-	curl := exec.Command("curl", "http://"+originAddr, "--header", "Transfer-Encoding: chunked", "--data-binary", "@/tmp/large")
+	curl := exec.Command("curl", "http://"+originAddr, "--header", "Transfer-Encoding: chunked", "--header", "Expect:", "--data-binary", "@/tmp/large")
 	err = curl.Run()
 	if err != nil {
 		log.Fatal("curl error:", err)
@@ -241,3 +244,60 @@ func TestInputRAWLargePayload(t *testing.T) {
 	wg.Wait()
 	close(quit)
 }
+
+func BenchmarkRAWInput(b *testing.B) {
+	quit := make(chan int)
+
+	origin := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {}))
+	defer origin.Close()
+	originAddr := strings.Replace(origin.Listener.Addr().String(), "[::]", "127.0.0.1", -1)
+
+	var respCounter, reqCounter int64
+
+	input := NewRAWInput(originAddr, EnginePcap, testRawExpire)
+	defer input.Close()
+
+	output := NewTestOutput(func(data []byte) {
+		if data[0] == '1' {
+			atomic.AddInt64(&reqCounter, 1)
+		} else {
+			atomic.AddInt64(&respCounter, 1)
+		}
+
+		// log.Println("Captured ", reqCounter, "requests and ", respCounter, " responses")
+	})
+
+	Plugins.Inputs = []io.Reader{input}
+	Plugins.Outputs = []io.Writer{output}
+
+	go Start(quit)
+
+	emitted := 0
+	fileContent, _ := ioutil.ReadFile("LICENSE.txt")
+
+	for i := 0; i < b.N; i++ {
+		wg := new(sync.WaitGroup)
+		wg.Add(10 * 100)
+		emitted += 10 * 100
+		for w := 0; w < 100; w++ {
+			go func() {
+				client := NewHTTPClient(origin.URL, &HTTPClientConfig{})
+				for i := 0; i < 10; i++ {
+					if rand.Int63n(2) == 0 {
+						client.Post("/", fileContent)
+					} else {
+						client.Get("/")
+					}
+					time.Sleep(time.Duration(rand.Int63n(50)) * time.Millisecond)
+					wg.Done()
+				}
+			}()
+		}
+		wg.Wait()
+	}
+
+	time.Sleep(400 * time.Millisecond)
+	log.Println("Emitted ", emitted, ", Captured ", reqCounter, "requests and ", respCounter, " responses")
+
+	close(quit)
+}

middleware.go

@@ -85,13 +85,22 @@ func (m *Middleware) copy(to io.Writer, from io.Reader) {
 }
 
 func (m *Middleware) read(from io.Reader) {
-	scanner := bufio.NewScanner(from)
+	reader := bufio.NewReader(from)
+	var line []byte
+	var e error
 
-	for scanner.Scan() {
-		bytes := scanner.Bytes()
-		buf := make([]byte, len(bytes)/2)
-		if _, err := hex.Decode(buf, bytes); err != nil {
-			fmt.Fprintln(os.Stderr, "Failed to decode input payload", err, len(bytes))
+	for {
+		if line, e = reader.ReadBytes('\n'); e != nil {
+			if e == io.EOF {
+				continue
+			} else {
+				break
+			}
+		}
+
+		buf := make([]byte, len(line)/2)
+		if _, err := hex.Decode(buf, line[:len(line)-1]); err != nil {
+			fmt.Fprintln(os.Stderr, "Failed to decode input payload", err, len(line))
 		}
 
 		if Settings.debug {
@@ -101,10 +110,6 @@ func (m *Middleware) read(from io.Reader) {
 		m.data <- buf
 	}
 
-	if err := scanner.Err(); err != nil {
-		fmt.Fprintln(os.Stderr, "Traffic modifier command failed:", err)
-	}
-
 	return
 }
 

middleware_test.go

@@ -116,7 +116,8 @@ func TestEchoMiddleware(t *testing.T) {
 	Settings.middleware = "./examples/middleware/echo.sh"
 
 	// Catch traffic from one service
-	input := NewRAWInput(from.Listener.Addr().String(), testRawExpire)
+	fromAddr := strings.Replace(from.Listener.Addr().String(), "[::]", "127.0.0.1", -1)
+	input := NewRAWInput(fromAddr, EnginePcap, testRawExpire)
 	defer input.Close()
 
 	// And redirect to another
@@ -129,7 +130,7 @@ func TestEchoMiddleware(t *testing.T) {
 	go Start(quit)
 
 	// Wait till middleware initialization
-	time.Sleep(10*time.Millisecond)
+	time.Sleep(100 * time.Millisecond)
 
 	// Should receive 2 requests from original + 2 from replayed
 	client := NewHTTPClient(from.URL, &HTTPClientConfig{Debug: false})
@@ -138,7 +139,9 @@ func TestEchoMiddleware(t *testing.T) {
 		wg.Add(4)
 		// Request should be echoed
 		client.Get("/a")
+		time.Sleep(5 * time.Millisecond)
 		client.Get("/b")
+		time.Sleep(5 * time.Millisecond)
 	}
 
 	wg.Wait()
@@ -176,7 +179,7 @@ func TestTokenMiddleware(t *testing.T) {
 
 	fromAddr := strings.Replace(from.Listener.Addr().String(), "[::]", "127.0.0.1", -1)
 	// Catch traffic from one service
-	input := NewRAWInput(fromAddr, testRawExpire)
+	input := NewRAWInput(fromAddr, EnginePcap, testRawExpire)
 	defer input.Close()
 
 	// And redirect to another

output_tcp.go

@@ -50,7 +50,7 @@ func (o *TCPOutput) worker() {
 		_, err := conn.Write([]byte(payloadSeparator))
 
 		if err != nil {
-			log.Println("Worker failed on write, exitings and starting new worker")
+			log.Println("Worker failed on write, exitings and starting new worker:", err)
 			go o.worker()
 			break
 		}

plugins.go

@@ -79,8 +79,13 @@ func InitPlugins() {
 		registerPlugin(NewDummyOutput, options)
 	}
 
+	engine := EnginePcap
+	if Settings.inputRAWEngine == "raw_socket" {
+		engine = EngineRawSocket
+	}
+
 	for _, options := range Settings.inputRAW {
-		registerPlugin(NewRAWInput, options, time.Duration(0))
+		registerPlugin(NewRAWInput, options, engine, time.Duration(0))
 	}
 
 	for _, options := range Settings.inputTCP {

raw_socket_listener/listener.go

@@ -15,16 +15,25 @@ package rawSocket
 import (
 	"bytes"
 	"encoding/binary"
+	"fmt"
+	"github.com/google/gopacket"
+	_ "github.com/google/gopacket/layers"
+	"github.com/google/gopacket/pcap"
+	"io"
 	"log"
 	"net"
 	"runtime/debug"
 	"strconv"
 	"strings"
+	"sync"
 	"time"
 )
 
+var _ = fmt.Println
+
 // Listener handle traffic capture
 type Listener struct {
+	mu sync.Mutex
 	// buffer of TCPMessages waiting to be send
 	// ID -> TCPMessage
 	messages map[string]*TCPMessage
@@ -42,10 +51,10 @@ type Listener struct {
 	respWithoutReq map[uint32]string
 
 	// Messages ready to be send to client
-	packetsChan chan *TCPPacket
+	packetsQueue *PacketQueue
 
 	// Messages ready to be send to client
-	messagesChan chan *TCPMessage
+	messagesQueue *MessageQueue
 
 	addr string // IP to listen
 	port uint16 // Port to listen
@@ -54,20 +63,30 @@ type Listener struct {
 
 	conn net.PacketConn
 	quit chan bool
+	readyCh chan bool
 }
 
 type request struct {
+	id    string
 	start time.Time
 	ack   uint32
 }
 
+// Available engines for intercepting traffic
+const (
+	EngineRawSocket = 1 << iota
+	EnginePcap
+)
+
 // NewListener creates and initializes new Listener object
-func NewListener(addr string, port string, expire time.Duration) (l *Listener) {
+func NewListener(addr string, port string, engine int, expire time.Duration) (l *Listener) {
 	l = &Listener{}
 
-	l.packetsChan = make(chan *TCPPacket, 10000)
-	l.messagesChan = make(chan *TCPMessage, 10000)
+	l.messagesQueue = &MessageQueue{lastCommittedIndex : 0, nextFreeIndex : 1, readerIndex : 1}
+	l.packetsQueue = &PacketQueue{lastCommittedIndex : 0, nextFreeIndex : 1, readerIndex : 1}
+
 	l.quit = make(chan bool)
+	l.readyCh = make(chan bool, 1)
 
 	l.messages = make(map[string]*TCPMessage)
 	l.ackAliases = make(map[uint32]uint32)
@@ -86,15 +105,34 @@ func NewListener(addr string, port string, expire time.Duration) (l *Listener) {
 	l.messageExpire = expire
 
 	go l.listen()
+	go l.processPackets()
 
 	// Special case for testing
 	if l.port != 0 {
-		go l.readRAWSocket()
+		switch engine {
+		case EngineRawSocket:
+			go l.readRAWSocket()
+		case EnginePcap:
+			go l.readPcap()
+		default:
+			log.Fatal("Unknown traffic interception engine:", engine)
+		}
 	}
 
 	return
 }
 
+func (t *Listener) processPackets() {
+	for {
+		// We need to use channels to process each packet to avoid data races
+		packet := t.packetsQueue.Read()
+		// log.Println(packet)
+		t.mu.Lock()
+		t.processTCPPacket(packet)
+		t.mu.Unlock()
+	}
+}
+
 func (t *Listener) listen() {
 	gcTicker := time.Tick(t.messageExpire / 2)
 
@@ -105,36 +143,42 @@ func (t *Listener) listen() {
 				t.conn.Close()
 			}
 			return
-		// We need to use channels to process each packet to avoid data races
-		case packet := <-t.packetsChan:
-			maxLen := len(packet.Data)
-			if maxLen > 500 {
-				maxLen = 500
-			}
-
-			t.processTCPPacket(packet)
-
 		case <-gcTicker:
 			now := time.Now()
+			// log.Println("GC")
 
+			t.mu.Lock()
+			// Dispatch requests before responses
 			for _, message := range t.messages {
-				if now.Sub(message.Start) >= t.messageExpire {
+				if now.Sub(message.End) >= t.messageExpire {
 					t.dispatchMessage(message)
 				}
 			}
+
+			t.mu.Unlock()
 		}
 	}
 }
 
 func (t *Listener) dispatchMessage(message *TCPMessage) {
+	// If already dispatched
+	if _, ok := t.messages[message.ID]; !ok {
+		return
+	}
+
 	delete(t.ackAliases, message.Ack)
 	delete(t.messages, message.ID)
+	delete(t.respAliases, message.ResponseAck)
+
+	// log.Println("Dispatching, message", message.Seq, message.Ack, string(message.Bytes()))
 
 	if message.IsIncoming {
 		// If there were response before request
+		// log.Println("Looking for Response: ", t.respWithoutReq, message.ResponseAck)
 		if respID, ok := t.respWithoutReq[message.ResponseAck]; ok {
 			if resp, rok := t.messages[respID]; rok {
 				if resp.RequestAck == 0 {
+					// log.Println("FOUND RESPONSE")
 					resp.RequestAck = message.Ack
 					resp.RequestStart = message.Start
 
@@ -144,17 +188,130 @@ func (t *Listener) dispatchMessage(message *TCPMessage) {
 				}
 			}
 		}
+
+
 	} else {
+		if message.RequestAck == 0 {
+			if responseRequest, ok := t.respAliases[message.Ack]; ok {
+				message.RequestStart = responseRequest.start
+				message.RequestAck = responseRequest.ack
+			}
+		}
+
 		delete(t.respAliases, message.Ack)
 		delete(t.respWithoutReq, message.Ack)
 
 		// Do not track responses which have no associated requests
 		if message.RequestAck == 0 {
+			// log.Println("Can't dispatch resp", message.Seq, message.Ack, string(message.Bytes()))
 			return
 		}
 	}
 
-	t.messagesChan <- message
+	t.messagesQueue.Write(message)
+}
+
+// DeviceNotFoundError raised if user specified wrong ip
+type DeviceNotFoundError struct {
+	addr string
+}
+
+func (e *DeviceNotFoundError) Error() string {
+	devices, _ := pcap.FindAllDevs()
+
+	var msg string
+	msg += "Can't find interfaces with addr: " + e.addr + ". Provide available IP for intercepting traffic: \n"
+	for _, device := range devices {
+		msg += "Name: " + device.Name + "\n"
+		if device.Description != "" {
+			msg += "Description: " + device.Description + "\n"
+		}
+		for _, address := range device.Addresses {
+			msg += "- IP address: " + address.IP.String() + "\n"
+		}
+	}
+
+	return msg
+}
+
+func findPcapDevice(addr string) (*pcap.Interface, error) {
+	devices, err := pcap.FindAllDevs()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	for _, device := range devices {
+		for _, address := range device.Addresses {
+			if address.IP.String() == addr {
+				return &device, nil
+			}
+		}
+	}
+
+	return nil, &DeviceNotFoundError{addr}
+}
+
+func (t *Listener) readPcap() {
+	device, err := findPcapDevice(t.addr)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	handle, err := pcap.OpenLive(device.Name, 65536, true, t.messageExpire)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer handle.Close()
+
+	if err := handle.SetBPFFilter("tcp and port " + strconv.Itoa(int(t.port))); err != nil {
+		log.Fatal(err)
+	}
+
+	source := gopacket.NewPacketSource(handle, handle.LinkType())
+	source.Lazy = true
+	source.NoCopy = true
+
+	t.readyCh <- true
+
+	// log.Println(handle.Stats())
+
+	for {
+		packet, err := source.NextPacket()
+
+		if err == io.EOF {
+			break
+		} else if err != nil {
+			continue
+		}
+
+		// Skip ethernet layer, 14 bytes
+		data := packet.Data()[14:]
+		ihl := uint8(data[0]) & 0x0F
+
+		// Truncated IP info
+		if len(data) < int(ihl*4) {
+			continue
+		}
+
+		srcIP := data[12:16]
+		data = data[ihl*4:]
+
+		// Truncated TCP info
+		if len(data) < 13 {
+			continue
+		}
+
+		dataOffset := (data[12] & 0xF0) >> 4
+
+		// We need only packets with data inside
+		// Check that the buffer is larger than the size of the TCP header
+		if len(data) > int(dataOffset*4) {
+			newBuf := make([]byte, len(data))
+			copy(newBuf, data)
+
+			t.packetsQueue.Write(ParseTCPPacket(net.IP(srcIP).String(), newBuf))
+		}
+	}
 }
 
 func (t *Listener) readRAWSocket() {
@@ -169,6 +326,8 @@ func (t *Listener) readRAWSocket() {
 
 	buf := make([]byte, 64*1024) // 64kb
 
+	t.readyCh <- true
+
 	for {
 		// Note: ReadFrom receive messages without IP header
 		n, addr, err := t.conn.ReadFrom(buf)
@@ -186,9 +345,7 @@ func (t *Listener) readRAWSocket() {
 				newBuf := make([]byte, n)
 				copy(newBuf, buf[:n])
 
-				go func(newBuf []byte) {
-					t.packetsChan <- ParseTCPPacket(addr, newBuf)
-				}(newBuf)
+				t.packetsQueue.Write(ParseTCPPacket(addr.String(), newBuf))
 			}
 		}
 	}
@@ -230,14 +387,32 @@ func (t *Listener) processTCPPacket(packet *TCPPacket) {
 		}
 	}()
 
+	// log.Println("Processing packet:", packet.Ack, packet.Seq, string(packet.Data))
+
 	var message *TCPMessage
 
 	isIncoming := packet.DestPort == t.port
 
+	// Seek for 100-expect chunks
 	if parentAck, ok := t.seqWithData[packet.Seq]; ok {
+		// log.Println("Found data package with Ack:", packet.Ack)
+		// In case if non-first data chunks comes first
+		for _id, m := range t.messages {
+			// log.Println("Message ack:", m.Ack, m.packets[0].Addr, packet.Addr)
+			if m.Ack == packet.Ack && m.packets[0].Addr == packet.Addr {
+				delete(t.messages, _id)
+
+				for _, pkt := range m.packets {
+					pkt.Ack = parentAck
+					// Re-queue this packets
+					t.processTCPPacket(pkt)
+				}
+			}
+		}
+
+		delete(t.seqWithData, packet.Seq)
 		t.ackAliases[packet.Ack] = parentAck
 		packet.Ack = parentAck
-		delete(t.seqWithData, packet.Seq)
 	}
 
 	if alias, ok := t.ackAliases[packet.Ack]; ok {
@@ -250,7 +425,7 @@ func (t *Listener) processTCPPacket(packet *TCPPacket) {
 		responseRequest, _ = t.respAliases[packet.Ack]
 	}
 
-	mID := packet.Addr.String() + strconv.Itoa(int(packet.DestPort)) + strconv.Itoa(int(packet.Ack))
+	mID := packet.Addr + strconv.Itoa(int(packet.DestPort)) + strconv.Itoa(int(packet.Ack))
 
 	message, ok := t.messages[mID]
 
@@ -262,6 +437,7 @@ func (t *Listener) processTCPPacket(packet *TCPPacket) {
 			if responseRequest != nil {
 				message.RequestStart = responseRequest.start
 				message.RequestAck = responseRequest.ack
+				message.RequestID = responseRequest.id
 			} else {
 				t.respWithoutReq[packet.Ack] = mID
 			}
@@ -276,7 +452,9 @@ func (t *Listener) processTCPPacket(packet *TCPPacket) {
 			t.seqWithData[seq] = packet.Ack
 
 			// In case if sequence packet came first
+			// log.Println("Looking for sequences:", seq, t.messages)
 			for _id, m := range t.messages {
+				// log.Println("SeqSEQ", m.Seq, len(m.packets))
 				if m.Seq == seq {
 					t.ackAliases[m.Ack] = packet.Ack
 
@@ -290,33 +468,56 @@ func (t *Listener) processTCPPacket(packet *TCPPacket) {
 
 			// Removing `Expect: 100-continue` header
 			packet.Data = append(packet.Data[:len(packet.Data)-24], packet.Data[len(packet.Data)-2:]...)
+
+			// log.Println(string(packet.Data))
 		}
 	}
 
-	if isIncoming {
-		// If message have multiple packets, delete previous alias
-		if len(message.packets) > 0 {
-			delete(t.respAliases, message.ResponseAck)
-		}
-
-		responseAck := packet.Seq + uint32(message.BodySize()) + uint32(len(packet.Data))
-		t.respAliases[responseAck] = &request{message.Start, message.Ack}
-
-		message.ResponseAck = responseAck
-	}
-
 	// Adding packet to message
 	message.AddPacket(packet)
 
+	if isIncoming {
+		// If message have multiple packets, delete previous alias
+		if len(message.packets) > 1 {
+			delete(t.respAliases, message.ResponseAck)
+		}
+
+		message.UpdateResponseAck()
+		t.respAliases[message.ResponseAck] = &request{message.ID, message.Start, message.Ack}
+	}
+
 	// If message contains only single packet immediately dispatch it
 	if message.IsFinished() {
-		t.dispatchMessage(message)
+		if isIncoming {
+			if resp, ok := t.messages[message.ResponseID()]; ok {
+				t.dispatchMessage(message)
+				if resp.IsFinished() {
+					t.dispatchMessage(resp)
+				}
+			}
+		} else {
+			if req, ok := t.messages[message.RequestID]; ok {
+				if req.IsFinished() {
+					t.dispatchMessage(req)
+					t.dispatchMessage(message)
+				}
+			}
+		}
+	}
+}
+
+func (t *Listener) IsReady() bool {
+	select {
+	case <- t.readyCh:
+		return true
+	case <- time.After(5 * time.Second):
+		return false
 	}
 }
 
 // Receive TCP messages from the listener channel
-func (t *Listener) Receive() *TCPMessage {
-	return <-t.messagesChan
+func (t *Listener) Receiver() *MessageQueue {
+	return t.messagesQueue
 }
 
 func (t *Listener) Close() {

raw_socket_listener/listener_test.go

@@ -2,29 +2,31 @@ package rawSocket
 
 import (
 	"bytes"
-	_ "log"
+	"log"
 	"testing"
 	"time"
+	"math/rand"
+	"sync/atomic"
 )
 
 func TestRawListenerInput(t *testing.T) {
 	var req, resp *TCPMessage
 
-	listener := NewListener("", "0", 10*time.Millisecond)
+	listener := NewListener("", "0", EnginePcap, 10*time.Millisecond)
 	defer listener.Close()
 
 	reqPacket := buildPacket(true, 1, 1, []byte("GET / HTTP/1.1"))
 
-	listener.packetsChan <- reqPacket
-
 	respAck := reqPacket.Seq + uint32(len(reqPacket.Data))
 	respPacket := buildPacket(false, respAck, reqPacket.Seq+1, []byte("HTTP/1.1 200 OK"))
-	listener.packetsChan <- respPacket
+
+	listener.processTCPPacket(reqPacket)
+	listener.processTCPPacket(respPacket)
 
 	select {
 	case req = <-listener.messagesChan:
 	case <-time.After(time.Millisecond):
-		t.Error("Should return respose immediately")
+		t.Error("Should return request immediately")
 		return
 	}
 
@@ -34,7 +36,7 @@ func TestRawListenerInput(t *testing.T) {
 
 	select {
 	case resp = <-listener.messagesChan:
-	case <-time.After(time.Millisecond):
+	case <-time.After(20 * time.Millisecond):
 		t.Error("Should return response immediately")
 		return
 	}
@@ -47,15 +49,15 @@ func TestRawListenerInput(t *testing.T) {
 func TestRawListenerResponse(t *testing.T) {
 	var req, resp *TCPMessage
 
-	listener := NewListener("", "0", 10*time.Millisecond)
+	listener := NewListener("", "0", EnginePcap, 10*time.Millisecond)
 	defer listener.Close()
 
 	reqPacket := buildPacket(true, 1, 1, []byte("GET / HTTP/1.1"))
 	respPacket := buildPacket(false, 1+uint32(len(reqPacket.Data)), 2, []byte("HTTP/1.1 200 OK"))
 
 	// If response packet comes before request
-	listener.packetsChan <- respPacket
-	listener.packetsChan <- reqPacket
+	listener.processTCPPacket(respPacket)
+	listener.processTCPPacket(reqPacket)
 
 	select {
 	case req = <-listener.messagesChan:
@@ -87,7 +89,7 @@ func TestRawListenerResponse(t *testing.T) {
 func TestRawListener100Continue(t *testing.T) {
 	var req, resp *TCPMessage
 
-	listener := NewListener("", "0", 10*time.Millisecond)
+	listener := NewListener("", "0", EnginePcap, 10*time.Millisecond)
 	defer listener.Close()
 
 	reqPacket1 := buildPacket(true, 1, 1, []byte("POST / HTTP/1.1\r\nContent-Length: 2\r\nExpect: 100-continue\r\n\r\n"))
@@ -98,7 +100,7 @@ func TestRawListener100Continue(t *testing.T) {
 	respPacket1 := buildPacket(false, 10, 3, []byte("HTTP/1.1 100 Continue\r\n"))
 
 	// panic(int(uint32(len(reqPacket1.Data)) + uint32(len(reqPacket2.Data)) + uint32(len(reqPacket3.Data))))
-	respPacket2 := buildPacket(false, reqPacket3.Seq+2 /* len of data */, 2, []byte("HTTP/1.1 200 OK\r\n"))
+	respPacket2 := buildPacket(false, reqPacket3.Seq+1 /* len of data */, 2, []byte("HTTP/1.1 200 OK\r\n"))
 
 	listener.processTCPPacket(reqPacket1)
 	listener.processTCPPacket(reqPacket2)
@@ -107,6 +109,63 @@ func TestRawListener100Continue(t *testing.T) {
 	listener.processTCPPacket(respPacket1)
 	listener.processTCPPacket(respPacket2)
 
+	select {
+	case req = <-listener.messagesChan:
+		break
+	case <-time.After(11 * time.Millisecond):
+		t.Error("Should return request after expire time")
+		return
+	}
+
+	if !bytes.Equal(req.Bytes(), []byte("POST / HTTP/1.1\r\nContent-Length: 2\r\n\r\nab")) {
+		t.Error("Should receive full message", string(req.Bytes()))
+	}
+
+	if !req.IsIncoming {
+		t.Error("Should be request")
+	}
+
+	select {
+	case resp = <-listener.messagesChan:
+		break
+	case <-time.After(21 * time.Millisecond):
+		t.Error("Should return response after expire time")
+		return
+	}
+
+	if resp.IsIncoming {
+		t.Error("Should be response")
+	}
+
+	if !bytes.Equal(resp.UUID(), req.UUID()) {
+		t.Error("Resp and Req UUID should be equal")
+	}
+}
+
+// Response comes before Request
+func TestRawListener100ContinueWrongOrder(t *testing.T) {
+	var req, resp *TCPMessage
+
+	listener := NewListener("", "0", EnginePcap, 10*time.Millisecond)
+	defer listener.Close()
+
+	reqPacket1 := buildPacket(true, 1, 1, []byte("POST / HTTP/1.1\r\nContent-Length: 2\r\nExpect: 100-continue\r\n\r\n"))
+	// Packet with data have different Seq
+	reqPacket2 := buildPacket(true, 2, reqPacket1.Seq+uint32(len(reqPacket1.Data)), []byte("a"))
+	reqPacket3 := buildPacket(true, 2, reqPacket2.Seq+1, []byte("b"))
+
+	respPacket1 := buildPacket(false, 10, 3, []byte("HTTP/1.1 100 Continue\r\n"))
+
+	// panic(int(uint32(len(reqPacket1.Data)) + uint32(len(reqPacket2.Data)) + uint32(len(reqPacket3.Data))))
+	respPacket2 := buildPacket(false, reqPacket3.Seq+1 /* len of data */, 2, []byte("HTTP/1.1 200 OK\r\n"))
+
+	listener.processTCPPacket(respPacket1)
+	listener.processTCPPacket(respPacket2)
+
+	listener.processTCPPacket(reqPacket1)
+	listener.processTCPPacket(reqPacket2)
+	listener.processTCPPacket(reqPacket3)
+
 	select {
 	case req = <-listener.messagesChan:
 		break
@@ -139,3 +198,205 @@ func TestRawListener100Continue(t *testing.T) {
 		t.Error("Resp and Req UUID should be equal")
 	}
 }
+
+func testChunkedSequence(t *testing.T, listener *Listener, packets ...*TCPPacket) {
+	var r, req, resp *TCPMessage
+
+	for _, p := range packets {
+		listener.processTCPPacket(p)
+	}
+
+	select {
+	case r = <-listener.messagesChan:
+		if r.IsIncoming {
+			req = r
+		} else {
+			resp = r
+		}
+		break
+	case <-time.After(25 * time.Millisecond):
+		t.Error("Should return request after expire time")
+		return
+	}
+	select {
+	case r = <-listener.messagesChan:
+		if r.IsIncoming {
+			if req != nil {
+				t.Error("Request already received", r)
+				return
+			}
+			req = r
+		} else {
+			if resp != nil {
+				t.Error("Response already received", r)
+				return
+			}
+			resp = r
+		}
+		break
+	case <-time.After(25 * time.Millisecond):
+		t.Error("Should return request after expire time")
+		return
+	}
+
+	if !bytes.Equal(req.Bytes(), []byte("POST / HTTP/1.1\r\nTransfer-Encoding: chunked\r\n\r\n1\r\na\r\n1\r\nb\r\n0\r\n\r\n")) {
+		t.Error("Should receive full message", string(req.Bytes()))
+	}
+
+	if !req.IsIncoming {
+		t.Error("Should be request")
+	}
+
+	if resp.IsIncoming {
+		t.Error("Should be response")
+	}
+
+	if !bytes.Equal(resp.UUID(), req.UUID()) {
+		t.Error("Resp and Req UUID should be equal", string(resp.UUID()), string(req.UUID()))
+	}
+
+	time.Sleep(15 * time.Millisecond)
+
+	if len(listener.messages) != 0 {
+		t.Error("Messages non empty:", listener.messages)
+	}
+}
+
+func permutation(n int, list []*TCPPacket) []*TCPPacket {
+	if len(list) == 1 {
+		return list
+	}
+
+	k := n % len(list)
+
+	first := []*TCPPacket{list[k]}
+	next := make([]*TCPPacket, len(list)-1)
+
+	copy(next, append(list[:k], list[k+1:]...))
+
+	return append(first, permutation(n/len(list), next)...)
+}
+
+// Response comes before Request
+func TestRawListenerChunkedWrongOrder(t *testing.T) {
+	listener := NewListener("", "0", EnginePcap, 10*time.Millisecond)
+	defer listener.Close()
+
+	reqPacket1 := buildPacket(true, 1, 1, []byte("POST / HTTP/1.1\r\nTransfer-Encoding: chunked\r\nExpect: 100-continue\r\n\r\n"))
+	// Packet with data have different Seq
+	reqPacket2 := buildPacket(true, 2, reqPacket1.Seq+uint32(len(reqPacket1.Data)), []byte("1\r\na\r\n"))
+	reqPacket3 := buildPacket(true, 2, reqPacket2.Seq+uint32(len(reqPacket2.Data)), []byte("1\r\nb\r\n"))
+	reqPacket4 := buildPacket(true, 2, reqPacket3.Seq+uint32(len(reqPacket3.Data)), []byte("0\r\n\r\n"))
+
+	respPacket1 := buildPacket(false, 10, 3, []byte("HTTP/1.1 100 Continue\r\n"))
+
+	// panic(int(uint32(len(reqPacket1.Data)) + uint32(len(reqPacket2.Data)) + uint32(len(reqPacket3.Data))))
+	respPacket2 := buildPacket(false, reqPacket4.Seq+5 /* len of data */, 2, []byte("HTTP/1.1 200 OK\r\n"))
+
+	// Should re-construct message from all possible combinations
+	for i := 0; i < 6*5*4*3*2*1; i++ {
+		packets := permutation(i, []*TCPPacket{reqPacket1, reqPacket2, reqPacket3, reqPacket4, respPacket1, respPacket2})
+		testChunkedSequence(t, listener, packets...)
+	}
+}
+
+
+func chunkedPostMessage() []*TCPPacket {
+	ack := uint32(rand.Int63())
+	seq := uint32(rand.Int63())
+
+	reqPacket1 := buildPacket(true, ack, seq, []byte("POST / HTTP/1.1\r\nTransfer-Encoding: chunked\r\n\r\n"))
+	// Packet with data have different Seq
+	reqPacket2 := buildPacket(true, ack, seq + 47, []byte("1\r\na\r\n"))
+	reqPacket3 := buildPacket(true, ack, reqPacket2.Seq+5, []byte("1\r\nb\r\n"))
+	reqPacket4 := buildPacket(true, ack, reqPacket3.Seq+5, []byte("0\r\n\r\n"))
+
+	respPacket := buildPacket(false, reqPacket4.Seq+5 /* len of data */, ack, []byte("HTTP/1.1 200 OK\r\n"))
+
+	return []*TCPPacket{
+		reqPacket1, reqPacket2, reqPacket3, reqPacket4, respPacket,
+	}
+}
+
+func postMessage() []*TCPPacket {
+	ack := uint32(rand.Int63())
+	seq2 := uint32(rand.Int63())
+	seq := uint32(rand.Int63())
+
+	c := 10000
+	data := make([]byte, c)
+	rand.Read(data)
+
+	head := []byte("POST / HTTP/1.1\r\nContent-Length: 9958\r\n\r\n")
+	for i, _ := range head {
+		data[i] = head[i]
+	}
+
+	return []*TCPPacket{
+		buildPacket(true, ack, seq, data),
+		buildPacket(false, seq + uint32(len(data)), seq2, []byte("HTTP/1.1 200 OK\r\n")),
+	}
+}
+
+func getMessage() []*TCPPacket {
+	ack := uint32(rand.Int63())
+	seq2 := uint32(rand.Int63())
+	seq := uint32(rand.Int63())
+
+	return []*TCPPacket{
+		buildPacket(true, ack, seq, []byte("GET / HTTP/1.1\r\n\r\n")),
+		buildPacket(false, seq + 18, seq2, []byte("HTTP/1.1 200 OK\r\n")),
+	}
+}
+
+// Response comes before Request
+func TestRawListenerBench(t *testing.T) {
+	l := NewListener("", "0", EnginePcap, 200*time.Millisecond)
+	defer l.Close()
+
+	// Should re-construct message from all possible combinations
+	for i := 0; i < 1000; i++ {
+		go func(){
+			for j := 0; j < 100; j++ {
+				var packets []*TCPPacket
+
+				if j % 5 == 0 {
+					packets = chunkedPostMessage()
+				} else if j % 3 == 0 {
+				 	packets = postMessage()
+				} else {
+					packets = getMessage()
+				}
+
+				for _, p := range packets {
+					// Randomly drop packets
+					if (i + j) % 5 == 0 {
+						if rand.Int63() % 3 == 0 {
+							continue
+						}
+					}
+
+					l.packetsQueue.Write(p)
+					time.Sleep(time.Millisecond)
+				}
+
+				time.Sleep(5 * time.Millisecond)
+			}
+		}()
+	}
+
+	ch := l.Receiver()
+
+	var count int32
+
+	for {
+		ch.Read()
+		select {
+			case <- ch:
+				atomic.AddInt32(&count, 1)
+			case <-time.After(2000 * time.Millisecond):
+				log.Println("Emitted 200000 messages, captured: ", count, len(l.ackAliases), len(l.seqWithData), len(l.respAliases), len(l.respWithoutReq))
+				return
+		}
+	}
+}

raw_socket_listener/queue.go

@@ -0,0 +1,75 @@
+package rawSocket
+
+const queueSize uint64 = 8192
+const indexMask uint64 = queueSize - 1
+
+type PacketQueue struct {
+    padding1 [8]uint64
+    lastCommittedIndex uint64
+    padding2 [8]uint64
+    nextFreeIndex uint64
+    padding3 [8]uint64
+    readerIndex uint64
+    padding4 [8]uint64
+    contents [queueSize]*TCPPacket
+    padding5 [8]uint64
+}
+
+func (self *PacketQueue) Write(value *TCPPacket) {
+    var myIndex = atomic.AddUint64(&self.nextFreeIndex, 1) - 1
+    //Wait for reader to catch up, so we don't clobber a slot which it is (or will be) reading
+    for myIndex > (self.readerIndex + queueSize - 2) {
+        runtime.Gosched()
+    }
+    //Write the item into it's slot
+    self.contents[myIndex & indexMask] = value
+    //Increment the lastCommittedIndex so the item is available for reading
+    for !atomic.CompareAndSwapUint64(&self.lastCommittedIndex, myIndex - 1, myIndex) {
+        runtime.Gosched()
+    }
+}
+
+func (self *PacketQueue) Read() *TCPPacket {
+    var myIndex = atomic.AddUint64(&self.readerIndex, 1) - 1
+    //If reader has out-run writer, wait for a value to be committed
+    for myIndex > self.lastCommittedIndex {
+        runtime.Gosched()
+    }
+    return self.contents[myIndex & indexMask]
+}
+
+
+type MessageQueue struct {
+    padding1 [8]uint64
+    lastCommittedIndex uint64
+    padding2 [8]uint64
+    nextFreeIndex uint64
+    padding3 [8]uint64
+    readerIndex uint64
+    padding4 [8]uint64
+    contents [queueSize]*TCPMessage
+    padding5 [8]uint64
+}
+
+func (self *MessageQueue) Write(value *TCPMessage) {
+    var myIndex = atomic.AddUint64(&self.nextFreeIndex, 1) - 1
+    //Wait for reader to catch up, so we don't clobber a slot which it is (or will be) reading
+    for myIndex > (self.readerIndex + queueSize - 2) {
+        runtime.Gosched()
+    }
+    //Write the item into it's slot
+    self.contents[myIndex & indexMask] = value
+    //Increment the lastCommittedIndex so the item is available for reading
+    for !atomic.CompareAndSwapUint64(&self.lastCommittedIndex, myIndex - 1, myIndex) {
+        runtime.Gosched()
+    }
+}
+
+func (self *MessageQueue) Read() *TCPMessage {
+    var myIndex = atomic.AddUint64(&self.readerIndex, 1) - 1
+    //If reader has out-run writer, wait for a value to be committed
+    for myIndex > self.lastCommittedIndex {
+        runtime.Gosched()
+    }
+    return self.contents[myIndex & indexMask]
+}

raw_socket_listener/tcp_message.go

@@ -23,6 +23,7 @@ type TCPMessage struct {
 	ResponseAck  uint32
 	RequestStart time.Time
 	RequestAck   uint32
+	RequestID    string
 	Start        time.Time
 	End          time.Time
 	IsIncoming   bool
@@ -95,11 +96,23 @@ func (t *TCPMessage) AddPacket(packet *TCPPacket) {
 		// Packets not always captured in same Seq order, and sometimes we need to prepend
 		if len(t.packets) == 0 || packet.Seq > t.packets[len(t.packets)-1].Seq {
 			t.packets = append(t.packets, packet)
-		} else {
+		} else if packet.Seq < t.packets[0].Seq {
 			t.packets = append([]*TCPPacket{packet}, t.packets...)
+			t.Seq = packet.Seq // Message Seq should indicated starting seq
+		} else { // insert somewhere in the middle...
+			for i, p := range t.packets {
+				if packet.Seq < p.Seq {
+					t.packets = append(t.packets[:i], append([]*TCPPacket{packet}, t.packets[i:]...)...)
+					break
+				}
+			}
 		}
 
-		t.End = time.Now()
+		if t.IsIncoming {
+			t.End = time.Now()
+		} else {
+			t.End = time.Now().Add(time.Millisecond)
+		}
 	}
 }
 
@@ -175,3 +188,15 @@ func (t *TCPMessage) UUID() []byte {
 
 	return uuid
 }
+
+// UpdateResponseAck should be called after packet is added
+func (t *TCPMessage) UpdateResponseAck() uint32 {
+	lastPacket := t.packets[len(t.packets)-1]
+	t.ResponseAck = lastPacket.Seq + uint32(len(lastPacket.Data))
+	return t.ResponseAck
+}
+
+// ResponseID generate message ID for request response
+func (t *TCPMessage) ResponseID() string {
+	return t.packets[0].Addr + strconv.Itoa(int(t.packets[0].SrcPort)) + strconv.Itoa(int(t.ResponseAck))
+}

raw_socket_listener/tcp_message_test.go

@@ -3,14 +3,13 @@ package rawSocket
 import (
 	"bytes"
 	_ "log"
-	"net"
 	"strconv"
 	"testing"
 )
 
 func buildPacket(isIncoming bool, Ack, Seq uint32, Data []byte) (packet *TCPPacket) {
 	packet = &TCPPacket{
-		Addr: &net.IPAddr{net.IP{}, ""},
+		Addr: "",
 		Ack:  Ack,
 		Seq:  Seq,
 		Data: Data,
@@ -27,7 +26,7 @@ func buildPacket(isIncoming bool, Ack, Seq uint32, Data []byte) (packet *TCPPack
 }
 
 func buildMessage(p *TCPPacket) *TCPMessage {
-	id := p.Addr.String() + strconv.Itoa(int(p.DestPort)) + strconv.Itoa(int(p.Ack))
+	id := p.Addr + strconv.Itoa(int(p.DestPort)) + strconv.Itoa(int(p.Ack))
 
 	isIncoming := false
 	if p.SrcPort == 1 {

raw_socket_listener/tcp_packet.go

@@ -2,7 +2,6 @@ package rawSocket
 
 import (
 	"encoding/binary"
-	"net"
 	"strconv"
 	"strings"
 )
@@ -35,11 +34,11 @@ type TCPPacket struct {
 
 	Data []byte
 
-	Addr net.Addr
+	Addr string
 }
 
 // ParseTCPPacket takes address and tcp payload and returns parsed TCPPacket
-func ParseTCPPacket(addr net.Addr, b []byte) (p *TCPPacket) {
+func ParseTCPPacket(addr string, b []byte) (p *TCPPacket) {
 	p = &TCPPacket{Data: b}
 	p.ParseBasic()
 	p.Addr = addr
@@ -75,7 +74,7 @@ func (t *TCPPacket) String() string {
 	}
 
 	return strings.Join([]string{
-		"Addr: " + t.Addr.String(),
+		"Addr: " + t.Addr,
 		"Source port: " + strconv.Itoa(int(t.SrcPort)),
 		"Dest port:" + strconv.Itoa(int(t.DestPort)),
 		"Sequence:" + strconv.Itoa(int(t.Seq)),

settings.go

@@ -41,7 +41,8 @@ type AppSettings struct {
 	inputFile  MultiOption
 	outputFile MultiOption
 
-	inputRAW MultiOption
+	inputRAW       MultiOption
+	inputRAWEngine string
 
 	middleware string
 
@@ -82,6 +83,8 @@ func init() {
 
 	flag.Var(&Settings.inputRAW, "input-raw", "Capture traffic from given port (use RAW sockets and require *sudo* access):\n\t# Capture traffic from 8080 port\n\tgor --input-raw :8080 --output-http staging.com")
 
+	flag.StringVar(&Settings.inputRAWEngine, "input-raw-engine", "libpcap", "Intercept traffic using `libpcap` (default), and `raw_socket`")
+
 	flag.StringVar(&Settings.middleware, "middleware", "", "Used for modifying traffic using external command")
 
 	flag.Var(&Settings.inputHTTP, "input-http", "Read requests from HTTP, should be explicitly sent from your application:\n\t# Listen for http on 9000\n\tgor --input-http :9000 --output-http staging.com")
@@ -93,6 +96,7 @@ func init() {
 
 	flag.BoolVar(&Settings.outputHTTPConfig.stats, "output-http-stats", false, "Report http output queue stats to console every 5 seconds.")
 	flag.BoolVar(&Settings.outputHTTPConfig.OriginalHost, "http-original-host", false, "Normally gor replaces the Host http header with the host supplied with --output-http.  This option disables that behavior, preserving the original Host header.")
+	flag.BoolVar(&Settings.outputHTTPConfig.Debug, "output-http-debug", false, "Enables http debug output.")
 
 	flag.StringVar(&Settings.outputHTTPConfig.elasticSearch, "output-http-elasticsearch", "", "Send request and response stats to ElasticSearch:\n\tgor --input-raw :8080 --output-http staging.com --output-http-elasticsearch 'es_host:api_port/index_name'")
 

test_input.go

@@ -53,6 +53,18 @@ func (i *TestInput) EmitLargePOST() {
 	rs := base64.URLEncoding.EncodeToString(rb)
 
 	i.data <- []byte("POST / HTTP/1.1\nHost: www.w3.org\nContent-Length:5242880\r\n\r\n" + rs)
+	Debug("Sent large POST")
+}
+
+// EmitSizedPOST emit a POST with a payload set to a supplied size
+func (i *TestInput) EmitSizedPOST(payloadSize int) {
+	rb := make([]byte, payloadSize)
+	rand.Read(rb)
+
+	rs := base64.URLEncoding.EncodeToString(rb)
+
+	i.data <- []byte("POST / HTTP/1.1\nHost: www.w3.org\nContent-Length:5242880\r\n\r\n" + rs)
+	Debug("Sent large POST")
 }
 
 // EmitOPTIONS emits OPTIONS request, similar to GET