commit 77b9baf5f15e2e865abfb0b935091b5c5268af5b
parent dff2c19a0738b02f3024b07446d952045f75fbad
Author: Robin Bron <robin@finwo.nl>
Date: Sat, 30 Apr 2022 02:33:23 +0200
Initialized manpage
Diffstat:
| M | .gitignore | | | 3 | ++- |
| A | .gitmodules | | | 6 | ++++++ |
| M | Makefile | | | 43 | ++++++++++++++++++++++++++++++++++++++----- |
| M | README.md | | | 112 | ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--- |
| A | lib/argparse | | | 1 | + |
| A | lib/inih | | | 1 | + |
| A | manpage.1.md | | | 110 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | pmlag.html | | | 311 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| M | src/main.c | | | 150 | ++++++++++++++++++++++++++++++++++++++++++++++--------------------------------- |
9 files changed, 665 insertions(+), 72 deletions(-)
diff --git a/.gitignore b/.gitignore
@@ -1,2 +1,3 @@
pmlag
-*.o
+*.[ao]
+pmlag.[1,html]
diff --git a/.gitmodules b/.gitmodules
@@ -0,0 +1,6 @@
+[submodule "lib/argparse"]
+ path = lib/argparse
+ url = git://git.finwo.net/argparse
+[submodule "lib/inih"]
+ path = lib/inih
+ url = git://git.finwo.net/inih
diff --git a/Makefile b/Makefile
@@ -1,11 +1,44 @@
-SRC=$(wildcard src/*.c)
-OBJ=$(SRC:.c=.o)
+# Setup core
+SRC:=$(wildcard src/*.c)
+LIBS=
+CFLAGS?=
+BIN=pmlag
-default: pmlag
+# Include lib/argparse
+SRC+=lib/argparse/argparse.c
+CFLAGS+=-Ilib/argparse
+LIBS+=lib/argparse
-pmlag: $(OBJ)
- $(CC) $(SRC) -o pmlag
+# Include lib/ini
+SRC+=lib/inih/ini.c
+CFLAGS+=-Ilib/inih
+LIBS+=lib/inih
+# Translate and default rule
+OBJ:=$(SRC:.c=.o)
+default: $(BIN) $(BIN).1 README.md
+
+# How to fetch libraries
+$(LIBS):
+ git submodule update --init $@
+
+# How to generate object files
+$(OBJ): $(LIBS)
+ $(CC) $(CFLAGS) $(@:.o=.c) -c -o $@
+
+# Build main binary
+$(BIN): $(OBJ)
+ $(CC) $(CFLAGS) $(OBJ) -o $(BIN)
+
+# Build manpage
+$(BIN).1: manpage.1.md
+ env NAME=$(BIN) envsubst < manpage.1.md | pandoc --standalone --from markdown --to man -o $(BIN).1
+ env NAME=$(BIN) envsubst < manpage.1.md | pandoc --standalone --from markdown --to html -o $(BIN).html
+
+README.md: manpage.1.md
+ env NAME=$(BIN) envsubst < manpage.1.md > README.md
+
+# Cleanup
.PHONY: clean
clean:
rm -rf $(OBJ)
diff --git a/README.md b/README.md
@@ -1,4 +1,110 @@
-PMLAG
------
+% pmlag(1) | General Commands Manual
-Poor man's link aggregation
+NAME
+====
+
+pmlag - Poor man's link aggregator
+
+SYNOPSIS
+========
+
+`pmlag [options]`
+
+DESCRIPTION
+===========
+
+pmlag is a tool for bonding network interfaces together when the hardware on
+the other side of the cable(s) doesn't necessarily support it.
+
+OPTIONS
+=======
+
+#### `-h, --help`
+
+Show the help message and exit
+
+#### `-c, --config <PATH>`
+
+Load a custom configuration instead of the default (/etc/pmlag.conf)
+
+CONFIGURATION
+=============
+
+The configuration is an ini-like format, where the sections are the name of the
+device being configured.
+
+The configuration can be reloaded by sending the USR1 signal to the process.
+
+#### broadcast
+
+Select the broadcast method for the bonded interface
+
+- flood: send out broadcast packages out over all interfaces
+- balanced: send out broadcast packages according to balancing strategy
+
+#### mode
+
+Select the balancing mode for non-broadcast packages
+
+- balance-rr: weighted round-robin balancing
+- active-backup: define a primary and backup interface
+
+#### mac
+
+Define the mac address of the bonded interface
+
+#### master
+
+Define which bonded interface the current described interface belongs to
+
+#### weight
+
+Behaves differently depending on the mode the bonded interface is in:
+
+- balance-rr: Specifies the share of traffic the interface transmits
+- active-backup: Specifies the priority of the interface (higher = more preferred)
+
+Try to keep this number as low as possible, as it's used directly to define
+the number of packets to send before moving to the next interface in the
+round-robin strategy.
+
+### Example:
+
+```ini
+[bond0]
+broadcast=flood
+mode=balance-rr
+mac=01:23:45:67:89:AB
+
+[eth0]
+master=bond0
+weight=1
+
+[eth1]
+master=bond0
+weight=10
+```
+
+LICENSE
+=======
+
+The MIT License (MIT)
+
+Copyright © 2022 finwo
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the “Software”), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/lib/argparse b/lib/argparse
@@ -0,0 +1 @@
+Subproject commit ffd9c23427d0cb105e27f27f0cf97b463b6a8bf8
diff --git a/lib/inih b/lib/inih
@@ -0,0 +1 @@
+Subproject commit 4bd3261ea422a99aa764e63820e16d19cdad33dd
diff --git a/manpage.1.md b/manpage.1.md
@@ -0,0 +1,110 @@
+% ${NAME}(1) | General Commands Manual
+
+NAME
+====
+
+${NAME} - Poor man's link aggregator
+
+SYNOPSIS
+========
+
+`${NAME} [options]`
+
+DESCRIPTION
+===========
+
+${NAME} is a tool for bonding network interfaces together when the hardware on
+the other side of the cable(s) doesn't necessarily support it.
+
+OPTIONS
+=======
+
+#### `-h, --help`
+
+Show the help message and exit
+
+#### `-c, --config <PATH>`
+
+Load a custom configuration instead of the default (/etc/${NAME}.conf)
+
+CONFIGURATION
+=============
+
+The configuration is an ini-like format, where the sections are the name of the
+device being configured.
+
+The configuration can be reloaded by sending the USR1 signal to the process.
+
+#### broadcast
+
+Select the broadcast method for the bonded interface
+
+- flood: send out broadcast packages out over all interfaces
+- balanced: send out broadcast packages according to balancing strategy
+
+#### mode
+
+Select the balancing mode for non-broadcast packages
+
+- balance-rr: weighted round-robin balancing
+- active-backup: define a primary and backup interface
+
+#### mac
+
+Define the mac address of the bonded interface
+
+#### master
+
+Define which bonded interface the current described interface belongs to
+
+#### weight
+
+Behaves differently depending on the mode the bonded interface is in:
+
+- balance-rr: Specifies the share of traffic the interface transmits
+- active-backup: Specifies the priority of the interface (higher = more preferred)
+
+Try to keep this number as low as possible, as it's used directly to define
+the number of packets to send before moving to the next interface in the
+round-robin strategy.
+
+### Example:
+
+```ini
+[bond0]
+broadcast=flood
+mode=balance-rr
+mac=01:23:45:67:89:AB
+
+[eth0]
+master=bond0
+weight=1
+
+[eth1]
+master=bond0
+weight=10
+```
+
+LICENSE
+=======
+
+The MIT License (MIT)
+
+Copyright © 2022 finwo
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the “Software”), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/pmlag.html b/pmlag.html
@@ -0,0 +1,311 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml" lang="" xml:lang="">
+<head>
+ <meta charset="utf-8" />
+ <meta name="generator" content="pandoc" />
+ <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes" />
+ <title>pmlag(1) | General Commands Manual</title>
+ <style>
+ html {
+ line-height: 1.5;
+ font-family: Georgia, serif;
+ font-size: 20px;
+ color: #1a1a1a;
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+ }
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+ font-kerning: normal;
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+ </style>
+ <!--[if lt IE 9]>
+ <script src="//cdnjs.cloudflare.com/ajax/libs/html5shiv/3.7.3/html5shiv-printshiv.min.js"></script>
+ <![endif]-->
+</head>
+<body>
+<header id="title-block-header">
+<h1 class="title">pmlag(1) | General Commands Manual</h1>
+</header>
+<h1 id="name">NAME</h1>
+<p>pmlag - Poor man’s link aggregator</p>
+<h1 id="synopsis">SYNOPSIS</h1>
+<p><code>pmlag [options]</code></p>
+<h1 id="description">DESCRIPTION</h1>
+<p>pmlag is a tool for bonding network interfaces together when the
+hardware on the other side of the cable(s) doesn’t necessarily support
+it.</p>
+<h1 id="options">OPTIONS</h1>
+<h4 id="h---help"><code>-h, --help</code></h4>
+<p>Show the help message and exit</p>
+<h4 id="c---config-path"><code>-c, --config <PATH></code></h4>
+<p>Load a custom configuration instead of the default
+(/etc/pmlag.conf)</p>
+<h1 id="configuration">CONFIGURATION</h1>
+<p>The configuration is an ini-like format, where the sections are the
+name of the device being configured.</p>
+<p>The configuration can be reloaded by sending the USR1 signal to the
+process.</p>
+<h4 id="broadcast">broadcast</h4>
+<p>Select the broadcast method for the bonded interface</p>
+<ul>
+<li>flood: send out broadcast packages out over all interfaces</li>
+<li>balanced: send out broadcast packages according to balancing
+strategy</li>
+</ul>
+<h4 id="mode">mode</h4>
+<p>Select the balancing mode for non-broadcast packages</p>
+<ul>
+<li>balance-rr: weighted round-robin balancing</li>
+<li>active-backup: define a primary and backup interface</li>
+</ul>
+<h4 id="mac">mac</h4>
+<p>Define the mac address of the bonded interface</p>
+<h4 id="master">master</h4>
+<p>Define which bonded interface the current described interface belongs
+to</p>
+<h4 id="weight">weight</h4>
+<p>Behaves differently depending on the mode the bonded interface is
+in:</p>
+<ul>
+<li>balance-rr: Specifies the share of traffic the interface
+transmits</li>
+<li>active-backup: Specifies the priority of the interface (higher =
+more preferred)</li>
+</ul>
+<p>Try to keep this number as low as possible, as it’s used directly to
+define the number of packets to send before moving to the next interface
+in the round-robin strategy.</p>
+<h3 id="example">Example:</h3>
+<div class="sourceCode" id="cb1"><pre
+class="sourceCode ini"><code class="sourceCode ini"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="kw">[bond0]</span></span>
+<span id="cb1-2"><a href="#cb1-2" aria-hidden="true" tabindex="-1"></a><span class="dt">broadcast</span><span class="ot">=</span><span class="st">flood</span></span>
+<span id="cb1-3"><a href="#cb1-3" aria-hidden="true" tabindex="-1"></a><span class="dt">mode</span><span class="ot">=</span><span class="st">balance-rr</span></span>
+<span id="cb1-4"><a href="#cb1-4" aria-hidden="true" tabindex="-1"></a><span class="dt">mac</span><span class="ot">=</span><span class="st">01:23:45:67:89:AB</span></span>
+<span id="cb1-5"><a href="#cb1-5" aria-hidden="true" tabindex="-1"></a></span>
+<span id="cb1-6"><a href="#cb1-6" aria-hidden="true" tabindex="-1"></a><span class="kw">[eth0]</span></span>
+<span id="cb1-7"><a href="#cb1-7" aria-hidden="true" tabindex="-1"></a><span class="dt">master</span><span class="ot">=</span><span class="st">bond0</span></span>
+<span id="cb1-8"><a href="#cb1-8" aria-hidden="true" tabindex="-1"></a><span class="dt">weight</span><span class="ot">=</span><span class="dv">1</span></span>
+<span id="cb1-9"><a href="#cb1-9" aria-hidden="true" tabindex="-1"></a></span>
+<span id="cb1-10"><a href="#cb1-10" aria-hidden="true" tabindex="-1"></a><span class="kw">[eth1]</span></span>
+<span id="cb1-11"><a href="#cb1-11" aria-hidden="true" tabindex="-1"></a><span class="dt">master</span><span class="ot">=</span><span class="st">bond0</span></span>
+<span id="cb1-12"><a href="#cb1-12" aria-hidden="true" tabindex="-1"></a><span class="dt">weight</span><span class="ot">=</span><span class="dv">10</span></span></code></pre></div>
+<h1 id="license">LICENSE</h1>
+<p>The MIT License (MIT)</p>
+<p>Copyright © 2022 finwo</p>
+<p>Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+“Software”), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:</p>
+<p>The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.</p>
+<p>THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.</p>
+</body>
+</html>
diff --git a/src/main.c b/src/main.c
@@ -1,77 +1,101 @@
-#include <arpa/inet.h>
-#include <net/ethernet.h>
-#include <net/if.h>
-#include <netinet/ip.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include <sys/ioctl.h>
-#include <sys/socket.h>
-#include <linux/if_packet.h>
+#include <arpa/inet.h>
+#include <netinet/in.h>
+#include <netinet/ip.h>
+#include <linux/if_ether.h>
+#include <sys/socket.h>
+#include "argparse.h"
+#include "ini.h"
#include "socket.h"
#ifdef __cplusplus
extern "C" {
#endif
-#define INTERFACE "wlp2s0"
-#define ERR_NAME "pmlag"
-
-int main(int argc, char **argv) {
- int sockfd = sockraw_open(INTERFACE);
-
- // Prepare ingress buffer
- int buflen;
- unsigned char *buffer = (unsigned char *) malloc(65536);
- memset(buffer, 0, 65536);
- struct sockaddr saddr;
- int saddr_len = sizeof(saddr);
-
- // Fetch a packet
- buflen = recvfrom(sockfd, buffer, 65536, 0, &saddr, (socklen_t *)&saddr_len);
- if (buflen < 0) {
- perror(ERR_NAME ": recvfrom");
- exit(EXIT_FAILURE);
- }
-
- printf("\n");
- printf("Got packet: %d bytes\n", buflen);
- printf("\n");
-
- struct ethhdr *eth = (struct ethhdr *)(buffer);
- printf("Ethernet header\n");
- printf("\t|- DST %.2X-%.2X-%.2X-%.2X-%.2X-%.2X\n",eth->h_dest[0],eth->h_dest[1],eth->h_dest[2],eth->h_dest[3],eth->h_dest[4],eth->h_dest[5]);
- printf("\t|- SRC %.2X-%.2X-%.2X-%.2X-%.2X-%.2X\n",eth->h_source[0],eth->h_source[1],eth->h_source[2],eth->h_source[3],eth->h_source[4],eth->h_source[5]);
- printf("\t|- PROTO %d\n",eth->h_proto);
-
- printf("\n");
-
- struct sockaddr_in source;
- struct sockaddr_in dest;
- if (eth->h_proto == 8) {
- unsigned short iphdrlen;
- struct iphdr *ip = (struct iphdr*)(buffer + sizeof(struct ethhdr));
- memset(&source, 0, sizeof(source));
- source.sin_addr.s_addr = ip->saddr;
- memset(&dest, 0, sizeof(dest));
- dest.sin_addr.s_addr = ip->daddr;
-
- printf("IP header\n");
- printf("\t|- Version %d\n",(unsigned int)ip->version);
- printf("\t|- Internet hlen %d DWORDS or %d Bytes\n",(unsigned int)ip->ihl,((unsigned int)(ip->ihl))*4);
- printf("\t|- Type Of Service %d\n",(unsigned int)ip->tos);
- printf("\t|- Total Length %d Bytes\n",ntohs(ip->tot_len));
- printf("\t|- Identification %d\n",ntohs(ip->id));
- printf("\t|- Time To Live %d\n",(unsigned int)ip->ttl);
- printf("\t|- Protocol %d\n",(unsigned int)ip->protocol);
- printf("\t|- Header Checksum %d\n",ntohs(ip->check));
- printf("\t|- Source IP %s\n", inet_ntoa(source.sin_addr));
- printf("\t|- Destination IP %s\n",inet_ntoa(dest.sin_addr));
-
- printf("\n");
- }
+#ifndef NAME
+#define NAME "pmlag"
+#endif
+
+static const char *const usage[] = {
+ NAME " [options]",
+ NULL
+};
+
+int main(int argc, const char **argv) {
+ const char *config_file = "/etc/" NAME ".conf";
+
+ struct argparse_option options[] = {
+ OPT_HELP(),
+ OPT_STRING('c', "config", &config_file, "Config file to use", NULL, 0, 0),
+ OPT_END(),
+ };
+
+ struct argparse argparse;
+ argparse_init(&argparse, options, usage, 0);
+ argparse_describe(&argparse, NULL,
+ // TODO: format to terminal width
+ "\n" NAME " is a tool for bonding network interfaces together when the "
+ "hardware\non the other side of the cable doesn't necessarily support it."
+ "\n"
+ );
+ argc = argparse_parse(&argparse, argc, argv);
+
+ /* int sockfd = sockraw_open(INTERFACE); */
+
+ /* // Prepare ingress buffer */
+ /* int buflen; */
+ /* unsigned char *buffer = (unsigned char *) malloc(65536); */
+ /* memset(buffer, 0, 65536); */
+ /* struct sockaddr saddr; */
+ /* int saddr_len = sizeof(saddr); */
+
+ /* // Fetch a packet */
+ /* buflen = recvfrom(sockfd, buffer, 65536, 0, &saddr, (socklen_t *)&saddr_len); */
+ /* if (buflen < 0) { */
+ /* perror("recvfrom"); */
+ /* exit(EXIT_FAILURE); */
+ /* } */
+
+ /* printf("\n"); */
+ /* printf("Got packet: %d bytes\n", buflen); */
+ /* printf("\n"); */
+
+ /* struct ethhdr *eth = (struct ethhdr *)(buffer); */
+ /* printf("Ethernet header\n"); */
+ /* printf("\t|- DST %.2X-%.2X-%.2X-%.2X-%.2X-%.2X\n",eth->h_dest[0],eth->h_dest[1],eth->h_dest[2],eth->h_dest[3],eth->h_dest[4],eth->h_dest[5]); */
+ /* printf("\t|- SRC %.2X-%.2X-%.2X-%.2X-%.2X-%.2X\n",eth->h_source[0],eth->h_source[1],eth->h_source[2],eth->h_source[3],eth->h_source[4],eth->h_source[5]); */
+ /* printf("\t|- PROTO %d\n",eth->h_proto); */
+
+ /* printf("\n"); */
+
+ /* struct sockaddr_in source; */
+ /* struct sockaddr_in dest; */
+ /* if (eth->h_proto == 8) { */
+ /* unsigned short iphdrlen; */
+ /* struct iphdr *ip = (struct iphdr*)(buffer + sizeof(struct ethhdr)); */
+ /* memset(&source, 0, sizeof(source)); */
+ /* source.sin_addr.s_addr = ip->saddr; */
+ /* memset(&dest, 0, sizeof(dest)); */
+ /* dest.sin_addr.s_addr = ip->daddr; */
+
+ /* printf("IP header\n"); */
+ /* printf("\t|- Version %d\n",(unsigned int)ip->version); */
+ /* printf("\t|- Internet hlen %d DWORDS or %d Bytes\n",(unsigned int)ip->ihl,((unsigned int)(ip->ihl))*4); */
+ /* printf("\t|- Type Of Service %d\n",(unsigned int)ip->tos); */
+ /* printf("\t|- Total Length %d Bytes\n",ntohs(ip->tot_len)); */
+ /* printf("\t|- Identification %d\n",ntohs(ip->id)); */
+ /* printf("\t|- Time To Live %d\n",(unsigned int)ip->ttl); */
+ /* printf("\t|- Protocol %d\n",(unsigned int)ip->protocol); */
+ /* printf("\t|- Header Checksum %d\n",ntohs(ip->check)); */
+ /* printf("\t|- Source IP %s\n", inet_ntoa(source.sin_addr)); */
+ /* printf("\t|- Destination IP %s\n",inet_ntoa(dest.sin_addr)); */
+
+ /* printf("\n"); */
+ /* } */
return 0;
}
