Initial (non-functional checkin)

git-svn-id: http://libproxy.googlecode.com/svn/trunk@3 c587cffe-e639-0410-9787-d7902ae8ed56

13 files changed, 604 insertions, 0 deletions

diff --git a/AUTHORS b/AUTHORS
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/AUTHORS
diff --git a/COPYING b/COPYING
new file mode 120000
index 0000000..0b6cbf8
--- /dev/null
+++ b/COPYING
@@ -0,0 +1 @@
+/usr/share/automake-1.10/COPYING
\ No newline at end of file
diff --git a/ChangeLog b/ChangeLog
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/ChangeLog
diff --git a/INSTALL b/INSTALL
new file mode 100644
index 0000000..5458714
--- /dev/null
+++ b/INSTALL
@@ -0,0 +1,234 @@
+Installation Instructions
+*************************
+
+Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002, 2004, 2005,
+2006 Free Software Foundation, Inc.
+
+This file is free documentation; the Free Software Foundation gives
+unlimited permission to copy, distribute and modify it.
+
+Basic Installation
+==================
+
+Briefly, the shell commands `./configure; make; make install' should
+configure, build, and install this package.  The following
+more-detailed instructions are generic; see the `README' file for
+instructions specific to this package.
+
+   The `configure' shell script attempts to guess correct values for
+various system-dependent variables used during compilation.  It uses
+those values to create a `Makefile' in each directory of the package.
+It may also create one or more `.h' files containing system-dependent
+definitions.  Finally, it creates a shell script `config.status' that
+you can run in the future to recreate the current configuration, and a
+file `config.log' containing compiler output (useful mainly for
+debugging `configure').
+
+   It can also use an optional file (typically called `config.cache'
+and enabled with `--cache-file=config.cache' or simply `-C') that saves
+the results of its tests to speed up reconfiguring.  Caching is
+disabled by default to prevent problems with accidental use of stale
+cache files.
+
+   If you need to do unusual things to compile the package, please try
+to figure out how `configure' could check whether to do them, and mail
+diffs or instructions to the address given in the `README' so they can
+be considered for the next release.  If you are using the cache, and at
+some point `config.cache' contains results you don't want to keep, you
+may remove or edit it.
+
+   The file `configure.ac' (or `configure.in') is used to create
+`configure' by a program called `autoconf'.  You need `configure.ac' if
+you want to change it or regenerate `configure' using a newer version
+of `autoconf'.
+
+The simplest way to compile this package is:
+
+  1. `cd' to the directory containing the package's source code and type
+     `./configure' to configure the package for your system.
+
+     Running `configure' might take a while.  While running, it prints
+     some messages telling which features it is checking for.
+
+  2. Type `make' to compile the package.
+
+  3. Optionally, type `make check' to run any self-tests that come with
+     the package.
+
+  4. Type `make install' to install the programs and any data files and
+     documentation.
+
+  5. You can remove the program binaries and object files from the
+     source code directory by typing `make clean'.  To also remove the
+     files that `configure' created (so you can compile the package for
+     a different kind of computer), type `make distclean'.  There is
+     also a `make maintainer-clean' target, but that is intended mainly
+     for the package's developers.  If you use it, you may have to get
+     all sorts of other programs in order to regenerate files that came
+     with the distribution.
+
+Compilers and Options
+=====================
+
+Some systems require unusual options for compilation or linking that the
+`configure' script does not know about.  Run `./configure --help' for
+details on some of the pertinent environment variables.
+
+   You can give `configure' initial values for configuration parameters
+by setting variables in the command line or in the environment.  Here
+is an example:
+
+     ./configure CC=c99 CFLAGS=-g LIBS=-lposix
+
+   *Note Defining Variables::, for more details.
+
+Compiling For Multiple Architectures
+====================================
+
+You can compile the package for more than one kind of computer at the
+same time, by placing the object files for each architecture in their
+own directory.  To do this, you can use GNU `make'.  `cd' to the
+directory where you want the object files and executables to go and run
+the `configure' script.  `configure' automatically checks for the
+source code in the directory that `configure' is in and in `..'.
+
+   With a non-GNU `make', it is safer to compile the package for one
+architecture at a time in the source code directory.  After you have
+installed the package for one architecture, use `make distclean' before
+reconfiguring for another architecture.
+
+Installation Names
+==================
+
+By default, `make install' installs the package's commands under
+`/usr/local/bin', include files under `/usr/local/include', etc.  You
+can specify an installation prefix other than `/usr/local' by giving
+`configure' the option `--prefix=PREFIX'.
+
+   You can specify separate installation prefixes for
+architecture-specific files and architecture-independent files.  If you
+pass the option `--exec-prefix=PREFIX' to `configure', the package uses
+PREFIX as the prefix for installing programs and libraries.
+Documentation and other data files still use the regular prefix.
+
+   In addition, if you use an unusual directory layout you can give
+options like `--bindir=DIR' to specify different values for particular
+kinds of files.  Run `configure --help' for a list of the directories
+you can set and what kinds of files go in them.
+
+   If the package supports it, you can cause programs to be installed
+with an extra prefix or suffix on their names by giving `configure' the
+option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'.
+
+Optional Features
+=================
+
+Some packages pay attention to `--enable-FEATURE' options to
+`configure', where FEATURE indicates an optional part of the package.
+They may also pay attention to `--with-PACKAGE' options, where PACKAGE
+is something like `gnu-as' or `x' (for the X Window System).  The
+`README' should mention any `--enable-' and `--with-' options that the
+package recognizes.
+
+   For packages that use the X Window System, `configure' can usually
+find the X include and library files automatically, but if it doesn't,
+you can use the `configure' options `--x-includes=DIR' and
+`--x-libraries=DIR' to specify their locations.
+
+Specifying the System Type
+==========================
+
+There may be some features `configure' cannot figure out automatically,
+but needs to determine by the type of machine the package will run on.
+Usually, assuming the package is built to be run on the _same_
+architectures, `configure' can figure that out, but if it prints a
+message saying it cannot guess the machine type, give it the
+`--build=TYPE' option.  TYPE can either be a short name for the system
+type, such as `sun4', or a canonical name which has the form:
+
+     CPU-COMPANY-SYSTEM
+
+where SYSTEM can have one of these forms:
+
+     OS KERNEL-OS
+
+   See the file `config.sub' for the possible values of each field.  If
+`config.sub' isn't included in this package, then this package doesn't
+need to know the machine type.
+
+   If you are _building_ compiler tools for cross-compiling, you should
+use the option `--target=TYPE' to select the type of system they will
+produce code for.
+
+   If you want to _use_ a cross compiler, that generates code for a
+platform different from the build platform, you should specify the
+"host" platform (i.e., that on which the generated programs will
+eventually be run) with `--host=TYPE'.
+
+Sharing Defaults
+================
+
+If you want to set default values for `configure' scripts to share, you
+can create a site shell script called `config.site' that gives default
+values for variables like `CC', `cache_file', and `prefix'.
+`configure' looks for `PREFIX/share/config.site' if it exists, then
+`PREFIX/etc/config.site' if it exists.  Or, you can set the
+`CONFIG_SITE' environment variable to the location of the site script.
+A warning: not all `configure' scripts look for a site script.
+
+Defining Variables
+==================
+
+Variables not defined in a site shell script can be set in the
+environment passed to `configure'.  However, some packages may run
+configure again during the build, and the customized values of these
+variables may be lost.  In order to avoid this problem, you should set
+them in the `configure' command line, using `VAR=value'.  For example:
+
+     ./configure CC=/usr/local2/bin/gcc
+
+causes the specified `gcc' to be used as the C compiler (unless it is
+overridden in the site shell script).
+
+Unfortunately, this technique does not work for `CONFIG_SHELL' due to
+an Autoconf bug.  Until the bug is fixed you can use this workaround:
+
+     CONFIG_SHELL=/bin/bash /bin/bash ./configure CONFIG_SHELL=/bin/bash
+
+`configure' Invocation
+======================
+
+`configure' recognizes the following options to control how it operates.
+
+`--help'
+`-h'
+     Print a summary of the options to `configure', and exit.
+
+`--version'
+`-V'
+     Print the version of Autoconf used to generate the `configure'
+     script, and exit.
+
+`--cache-file=FILE'
+     Enable the cache: use and save the results of the tests in FILE,
+     traditionally `config.cache'.  FILE defaults to `/dev/null' to
+     disable caching.
+
+`--config-cache'
+`-C'
+     Alias for `--cache-file=config.cache'.
+
+`--quiet'
+`--silent'
+`-q'
+     Do not print messages saying which checks are being made.  To
+     suppress all normal output, redirect it to `/dev/null' (any error
+     messages will still be shown).
+
+`--srcdir=DIR'
+     Look for the package's source code in directory DIR.  Usually
+     `configure' can determine that directory automatically.
+
+`configure' also accepts some other, not widely useful, options.  Run
+`configure --help' for more details.
+
diff --git a/Makefile.am b/Makefile.am
new file mode 100644
index 0000000..af437a6
--- /dev/null
+++ b/Makefile.am
@@ -0,0 +1 @@
+SUBDIRS = src
diff --git a/NEWS b/NEWS
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/NEWS
diff --git a/README b/README
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/README
diff --git a/configure.ac b/configure.ac
new file mode 100644
index 0000000..aae511a
--- /dev/null
+++ b/configure.ac
@@ -0,0 +1,34 @@
+#                                               -*- Autoconf -*-
+# Process this file with autoconf to produce a configure script.
+
+AC_PREREQ(2.61)
+AC_INIT([libproxy],[0.1],[nathaniel@natemccallum.com])
+AC_CONFIG_SRCDIR([src/proxy_factory.c])
+AM_INIT_AUTOMAKE
+
+# Checks for programs.
+AC_PROG_CC
+AC_PROG_CPP
+AC_PROG_INSTALL
+AC_PROG_LIBTOOL
+AC_PROG_LN_S
+AC_PROG_MAKE_SET
+
+# Checks for libraries.
+
+# Checks for header files.
+AC_HEADER_STDC
+#AC_CHECK_HEADERS([netdb.h stdlib.h string.h sys/socket.h unistd.h])
+
+# Checks for typedefs, structures, and compiler characteristics.
+AC_HEADER_STDBOOL
+AC_C_CONST
+AC_TYPE_SIZE_T
+CFLAGS="-std=c99 $CFLAGS"
+
+# Checks for library functions.
+AC_FUNC_MALLOC
+#AC_CHECK_FUNCS([gethostbyname gethostname memset socket strdup strstr])
+
+AC_CONFIG_FILES([Makefile src/Makefile])
+AC_OUTPUT
diff --git a/plugins/envvar.c b/plugins/envvar.c
new file mode 100644
index 0000000..2b3e8ee
--- /dev/null
+++ b/plugins/envvar.c
@@ -0,0 +1,27 @@
+#include <stdlib.h>
+#include <string.h>
+
+#include "proxy_plugin.h"
+
+PXConfig *get_config_cb(PXProxyFactory *self)
+{
+	char *proxy = getenv("http_proxy");
+	if (!proxy)  return NULL;
+	PXConfig *config = malloc(sizeof(PXConfig));
+	if (!config) return NULL;
+	config->url = strdup(proxy);
+	if (!config->url) { free(config); return NULL; }
+	config->ignore = strdup(""); // TODO: Make this pay attention to 'no_proxy' later
+	if (!config->ignore) { free(config->url); free(config); return NULL; }
+	return config;
+}
+
+void on_proxyfactory_instantiate(PXProxyFactory *self)
+{
+	px_proxy_factory_config_add(self, PX_CONFIG_BACKEND_ENVVAR, get_config_cb);
+}
+
+void on_proxyfactory_destantiate(PXProxyFactory *self)
+{
+	px_proxy_factory_config_del(self, PX_CONFIG_BACKEND_ENVVAR);
+}
diff --git a/src/Makefile.am b/src/Makefile.am
new file mode 100644
index 0000000..01e902e
--- /dev/null
+++ b/src/Makefile.am
@@ -0,0 +1,6 @@
+lib_LTLIBRARIES    = libproxy.la
+libproxy_la_SOURCES = proxy_factory.c proxy.h proxy_plugin.h
+libproxy_la_CFLAGS  = -fvisibility=hidden
+libproxy_la_LDFLAGS = -lm
+
+include_HEADERS = proxy.h
diff --git a/src/proxy.h b/src/proxy.h
new file mode 100644
index 0000000..097eb4c
--- /dev/null
+++ b/src/proxy.h
@@ -0,0 +1,18 @@
+enum _PXConfigBackend {
+	PX_CONFIG_BACKEND_AUTO    = 0,
+	PX_CONFIG_BACKEND_NONE    = 0,
+	PX_CONFIG_BACKEND_WIN32   = (1 << 0),
+	PX_CONFIG_BACKEND_KCONFIG = (1 << 1),
+	PX_CONFIG_BACKEND_GCONF   = (1 << 2),
+	PX_CONFIG_BACKEND_USER    = (1 << 3),
+	PX_CONFIG_BACKEND_SYSTEM  = (1 << 4),
+	PX_CONFIG_BACKEND_ENVVAR  = (1 << 5),
+	PX_CONFIG_BACKEND__LAST   = PX_CONFIG_BACKEND_ENVVAR
+};
+
+typedef struct _PXProxyFactory  PXProxyFactory;
+typedef enum   _PXConfigBackend PXConfigBackend;
+
+PXProxyFactory *px_proxy_factory_new      (PXConfigBackend config);
+char           *px_proxy_factory_get_proxy(PXProxyFactory *self, char *url);
+void            px_proxy_factory_free     (PXProxyFactory *self);
diff --git a/src/proxy_factory.c b/src/proxy_factory.c
new file mode 100644
index 0000000..0dffc94
--- /dev/null
+++ b/src/proxy_factory.c
@@ -0,0 +1,256 @@
+#include "proxy_plugin.h"
+
+#include <stdlib.h>
+#include <assert.h>
+#include <string.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <stdio.h>
+#include <dlfcn.h>
+#include <math.h>
+
+#ifdef WIN32
+#  define PROXY_IMPORT __declspec(dllimport)
+#  define PROXY_EXPORT __declspec(dllexport)
+#else
+#  define PROXY_IMPORT __attribute__((visibility("default")))
+#  define PROXY_EXPORT __attribute__((visibility("default")))
+#endif
+
+#define PLUGIN_DIR "/usr/lib/proxy/" VERSION "/plugins"
+
+struct _PXProxyFactory {
+	PXConfigBackend          mask;
+	void                   **plugins;
+	PXProxyFactoryCallback  *configs;
+	PXProxyFactoryCallback  *on_get_proxy;
+	PXPACRunnerCallback     *pac_runners;
+};
+
+static void *proxy_malloc (size_t size)
+{
+	void *tmp = malloc(size);
+	assert(tmp != NULL);
+	memset(tmp, 0, size);
+	return tmp;
+}
+
+static void proxy_free (void *mem)
+{
+	if (!mem) return;
+	free(mem);
+}
+
+PROXY_EXPORT PXProxyFactory *px_proxy_factory_new (PXConfigBackend config)
+{
+	PXProxyFactory *self = proxy_malloc(sizeof(PXProxyFactory));
+	self->configs        = proxy_malloc(sizeof(PXProxyFactoryCallback) * (((int) log2(PX_CONFIG_BACKEND__LAST)) + 1));
+	self->mask           = config;
+	unsigned int i;
+	
+	// Open the plugin dir
+	DIR *plugindir = opendir(PLUGIN_DIR);
+	if (!plugindir)
+	{
+		px_proxy_factory_free(self);
+		return NULL;
+	}
+	
+	// Count the number of plugins
+	for (i=0 ; readdir(plugindir) ; i++);
+	self->plugins = (void **) proxy_malloc(sizeof(void *) * (i + 1));
+	rewinddir(plugindir);
+	
+	// For each plugin...
+	struct dirent *ent;
+	for (i=0 ; ent = readdir(plugindir) ; i++)
+	{
+		// Load the plugin
+		char *tmp = proxy_malloc(strlen(PLUGIN_DIR) + strlen(ent->d_name) + 2);
+		sprintf(tmp, PLUGIN_DIR "/%s", ent->d_name);
+		self->plugins[i] = dlopen(tmp, RTLD_LOCAL);
+		proxy_free(tmp);
+		if (!(self->plugins[i]))
+		{
+			i--;
+			continue;
+		}
+		
+		// Call the instantiation hook
+		PXProxyFactoryCallback instantiate;
+		instantiate = dlsym(self->plugins[i], "on_proxyfactory_instantiate");
+		if (instantiate)
+			instantiate(self);
+	}
+	closedir(plugindir);
+	
+	// Make sure we have at least one config
+	if (px_proxy_factory_config_get_active(self) == PX_CONFIG_BACKEND_NONE)
+	{
+		px_proxy_factory_free(self);
+		return NULL;
+	}
+	
+	return self;
+}
+
+PROXY_EXPORT void px_proxy_factory_config_set (PXProxyFactory *self, PXConfigBackend config, PXProxyFactoryCallback callback)
+{
+	self->configs[((int) log2(config))] = callback;
+}
+
+PROXY_EXPORT PXConfigBackend px_proxy_factory_config_get_active (PXProxyFactory *self)
+{
+	// Find the first provided config
+	for (unsigned int i=0 ; i <= ((int) log2(PX_CONFIG_BACKEND__LAST)) ; i++)
+		if (self->configs[i])
+			return (1 << i);
+			
+	// No valid config found!
+	return PX_CONFIG_BACKEND_NONE;
+}
+
+PROXY_EXPORT char *px_proxy_factory_get_proxy (PXProxyFactory *self, char *url)
+{
+	return NULL;
+}
+
+PROXY_EXPORT void px_proxy_factory_on_get_proxy_add (PXProxyFactory *self, PXProxyFactoryCallback callback)
+{
+	unsigned int length = 0;
+	PXProxyFactoryCallback *tmp = NULL;
+
+	// Backup our current callbacks (NULL if none)
+	tmp = self->on_get_proxy;
+	
+	// If we have any callbacks, count them
+	// If user is trying to add an already existing callback, just ignore it
+	if (self->on_get_proxy)
+		for (length=0 ; self->on_get_proxy[length] ; length++)
+			if (callback == self->on_get_proxy[length])
+				return;
+	
+	// Allocate enough space for the old + new callbacks
+	self->on_get_proxy = proxy_malloc(sizeof(PXProxyFactoryCallback) * (length + 2));
+	
+	// Copy old callbacks into new memory (if any)
+	if (tmp)
+		memcpy(self->on_get_proxy, tmp, length);
+	
+	// Free old memory (if any)
+	proxy_free(tmp);
+}
+
+PROXY_EXPORT void px_proxy_factory_on_get_proxy_del (PXProxyFactory *self, PXProxyFactoryCallback callback)
+{
+	unsigned int length = 0, count = 0;
+	PXProxyFactoryCallback *tmp = NULL;
+	
+	// Sanity checks, get length and count
+	if (!self->on_get_proxy) return;
+	for (length=0,count=0 ; self->on_get_proxy[length] ; length++)
+		if (self->on_get_proxy[length] == callback)
+			count++;
+	if (length < 1 || count < 1) return;
+	
+	// Backup current callbacks
+	tmp = self->on_get_proxy;
+	
+	// Allocate new array
+	self->on_get_proxy = proxy_malloc(sizeof(PXProxyFactoryCallback) * (length - count + 1));
+	
+	// Copy in new values
+	int i,j;
+	for (i=0,j=0 ; tmp[i] ; i++)
+		if (tmp[i] != callback)
+			self->on_get_proxy[j++] = tmp[i];
+	
+	// Free old memory
+	proxy_free(tmp);
+}
+
+PROXY_EXPORT void px_proxy_factory_pac_runner_add (PXProxyFactory *self, PXPACRunnerCallback callback)
+{
+	unsigned int length = 0;
+	PXPACRunnerCallback *tmp = NULL;
+
+	// Backup our current callbacks (NULL if none)
+	tmp = self->pac_runners;
+	
+	// If we have any callbacks, count them
+	// If user is trying to add an already existing callback, just ignore it
+	if (self->pac_runners)
+		for (length=0 ; self->pac_runners[length] ; length++)
+			if (callback == self->pac_runners[length])
+				return;
+	
+	// Allocate enough space for the old + new callbacks
+	self->pac_runners = proxy_malloc(sizeof(PXPACRunnerCallback) * (length + 2));
+	
+	// Copy old callbacks into new memory (if any)
+	if (tmp)
+		memcpy(self->pac_runners, tmp, length);
+	
+	// Free old memory (if any)
+	proxy_free(tmp);
+}
+
+PROXY_EXPORT void px_proxy_factory_pac_runner_del (PXProxyFactory *self, PXPACRunnerCallback callback)
+{
+	unsigned int length = 0, count = 0;
+	PXPACRunnerCallback *tmp = NULL;
+	
+	// Sanity checks, get length and count
+	if (!self->pac_runners) return;
+	for (length=0,count=0 ; self->pac_runners[length] ; length++)
+		if (self->pac_runners[length] == callback)
+			count++;
+	if (length < 1 || count < 1) return;
+	
+	// Backup current callbacks
+	tmp = self->pac_runners;
+	
+	// Allocate new array
+	self->pac_runners = proxy_malloc(sizeof(PXPACRunnerCallback) * (length - count + 1));
+	
+	// Copy in new values
+	int i,j;
+	for (i=0,j=0 ; tmp[i] ; i++)
+		if (tmp[i] != callback)
+			self->pac_runners[j++] = tmp[i];
+	
+	// Free old memory
+	proxy_free(tmp);
+}
+
+PROXY_EXPORT void px_proxy_factory_free (PXProxyFactory *self)
+{
+	unsigned int i;
+	
+	if (!self) return;
+	
+	// Free the plugins
+	if (self->plugins)
+	{
+		for (i=0 ; self->plugins[i] ; i++)
+		{
+			// Call the destantiation hook
+			PXProxyFactoryCallback destantiate;
+			destantiate = dlsym(self->plugins[i], "on_proxyfactory_destantiate");
+			if (destantiate)
+				destantiate(self);
+			
+			// Unload the plugin
+			dlclose(self->plugins[i]);
+			self->plugins[i] = NULL;
+		}
+		proxy_free(self->plugins);
+	}
+	
+	// Free everything else
+	if (self->configs)      proxy_free(self->configs);
+	if (self->on_get_proxy) proxy_free(self->on_get_proxy);
+	if (self->pac_runners)  proxy_free(self->pac_runners);
+	proxy_free(self);
+}
+
diff --git a/src/proxy_plugin.h b/src/proxy_plugin.h
new file mode 100644
index 0000000..5d87b67
--- /dev/null
+++ b/src/proxy_plugin.h
@@ -0,0 +1,27 @@
+#include "proxy.h"
+
+// URLs look like this:
+//   http://host:port
+//   socks://host:port
+//   pac+http://pac_host:port/path/to/pac
+//   wpad://
+//   direct://
+// TODO: ignore syntax TBD
+struct _PXConfig {
+	char *url;
+	char *ignore;
+};
+typedef struct _PXConfig PXConfig;
+
+typedef void     *(*PXProxyFactoryCallback)         (PXProxyFactory *self);
+typedef char     *(*PXPACRunnerCallback)            (PXProxyFactory *self, const char *pac, const char *url, const char *hostname);
+
+void              px_proxy_factory_config_set       (PXProxyFactory *self, PXConfigBackend config, PXProxyFactoryCallback callback);
+void              px_proxy_factory_config_changed   (PXProxyFactory *self);
+PXConfigBackend   px_proxy_factory_config_get_active(PXProxyFactory *self);
+
+void              px_proxy_factory_network_changed  (PXProxyFactory *self);
+void              px_proxy_factory_on_get_proxy_add (PXProxyFactory *self, PXProxyFactoryCallback callback);
+void              px_proxy_factory_on_get_proxy_del (PXProxyFactory *self, PXProxyFactoryCallback callback);
+void              px_proxy_factory_pac_runner_add   (PXProxyFactory *self, PXPACRunnerCallback callback);
+void              px_proxy_factory_pac_runner_del   (PXProxyFactory *self, PXPACRunnerCallback callback);