Refactor of file main.c

File main.c is splitted in 2 files, one for scanning
arguments and the other for setting up the process.

Change-Id: I5f2d7fd354392d13cdeac6c2a8fceaaf551dea22
Signed-off-by: José Bollo <jose.bollo@iot.bzh>

1 files changed, 527 insertions, 0 deletions

diff --git a/src/afb-config.c b/src/afb-config.c
new file mode 100644
index 00000000..bd9a4344
--- /dev/null
+++ b/src/afb-config.c
@@ -0,0 +1,527 @@
+/*
+ * Copyright (C) 2015, 2016, 2017 "IoT.bzh"
+ * Author José Bollo <jose.bollo@iot.bzh>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * 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.
+ */
+
+#define _GNU_SOURCE
+#define NO_BINDING_VERBOSE_MACRO
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <getopt.h>
+#include <limits.h>
+
+#include "verbose.h"
+#include "afb-config.h"
+#include "afb-hook.h"
+
+#include <afb/afb-binding.h>
+
+#if !defined(BINDING_INSTALL_DIR)
+#error "you should define BINDING_INSTALL_DIR"
+#endif
+
+#define AFB_VERSION    "0.5"
+
+// default
+#define DEFLT_CNTX_TIMEOUT  3600	// default Client Connection
+					// Timeout
+#define DEFLT_API_TIMEOUT   20		// default Plugin API Timeout [0=NoLimit
+					// for Debug Only]
+#define DEFLT_CACHE_TIMEOUT 100000	// default Static File Chache
+					// [Client Side Cache
+					// 100000~=1day]
+#define DEFLT_AUTH_TOKEN    NULL	// expect for debug should == NULL
+#define CTX_NBCLIENTS       10		// allow a default of 10 authenticated
+					// clients
+
+
+// Define command line option
+#define SET_VERBOSE        1
+#define SET_BACKGROUND     2
+#define SET_FORGROUND      3
+
+#define SET_TCP_PORT       5
+#define SET_ROOT_DIR       6
+#define SET_ROOT_BASE      7
+#define SET_ROOT_API       8
+#define SET_ALIAS          9
+
+#define SET_CACHE_TIMEOUT  10
+#define SET_SESSION_DIR    11
+
+#define SET_AUTH_TOKEN     12
+#define SET_LDPATH         13
+#define SET_APITIMEOUT     14
+#define SET_CNTXTIMEOUT    15
+
+#define DISPLAY_VERSION    16
+#define DISPLAY_HELP       17
+
+#define SET_MODE           18
+#define SET_READYFD        19
+
+#define DBUS_CLIENT        20
+#define DBUS_SERVICE       21
+#define SO_BINDING         22
+
+#define SET_SESSIONMAX     23
+
+#define WS_CLIENT          24
+#define WS_SERVICE         25
+
+#define SET_ROOT_HTTP      26
+
+#define SET_TRACEREQ       27
+
+// Command line structure hold cli --command + help text
+typedef struct {
+	int val;		// command number within application
+	int has_arg;		// command number within application
+	char *name;		// command as used in --xxxx cli
+	char *help;		// help text
+} AFB_options;
+
+// Supported option
+static AFB_options cliOptions[] = {
+/* *INDENT-OFF* */
+	{SET_VERBOSE,       0, "verbose",     "Verbose Mode, repeat to increase verbosity"},
+
+	{SET_FORGROUND,     0, "foreground",  "Get all in foreground mode"},
+	{SET_BACKGROUND,    0, "daemon",      "Get all in background mode"},
+
+	{SET_TCP_PORT,      1, "port",        "HTTP listening TCP port  [default 1234]"},
+	{SET_ROOT_DIR,      1, "rootdir",     "Root Directory [default $HOME/.AFB]"},
+	{SET_ROOT_HTTP,     1, "roothttp",    "HTTP Root Directory [default rootdir]"},
+	{SET_ROOT_BASE,     1, "rootbase",    "Angular Base Root URL [default /opa]"},
+	{SET_ROOT_API,      1, "rootapi",     "HTML Root API URL [default /api]"},
+	{SET_ALIAS,         1, "alias",       "Muliple url map outside of rootdir [eg: --alias=/icons:/usr/share/icons]"},
+
+	{SET_APITIMEOUT,    1, "apitimeout",  "Binding API timeout in seconds [default 10]"},
+	{SET_CNTXTIMEOUT,   1, "cntxtimeout", "Client Session Context Timeout [default 900]"},
+	{SET_CACHE_TIMEOUT, 1, "cache-eol",   "Client cache end of live [default 3600]"},
+
+	{SET_SESSION_DIR,   1, "sessiondir",  "Sessions file path [default rootdir/sessions]"},
+
+	{SET_LDPATH,        1, "ldpaths",     "Load bindingss from dir1:dir2:... [default = " BINDING_INSTALL_DIR "]"},
+	{SET_AUTH_TOKEN,    1, "token",       "Initial Secret [default=no-session, --token= for session without authentication]"},
+
+	{DISPLAY_VERSION,   0, "version",     "Display version and copyright"},
+	{DISPLAY_HELP,      0, "help",        "Display this help"},
+
+	{SET_MODE,          1, "mode",        "Set the mode: either local, remote or global"},
+	{SET_READYFD,       1, "readyfd",     "Set the #fd to signal when ready"},
+
+	{DBUS_CLIENT,       1, "dbus-client", "Bind to an afb service through dbus"},
+	{DBUS_SERVICE,      1, "dbus-server", "Provides an afb service through dbus"},
+	{WS_CLIENT,         1, "ws-client",   "Bind to an afb service through websocket"},
+	{WS_SERVICE,        1, "ws-server",   "Provides an afb service through websockets"},
+	{SO_BINDING,        1, "binding",     "Load the binding of path"},
+
+	{SET_SESSIONMAX,    1, "session-max", "Max count of session simultaneously [default 10]"},
+
+	{SET_TRACEREQ,      1, "tracereq",    "Log the requests: no, common, extra, all"},
+
+	{0, 0, NULL, NULL}
+/* *INDENT-ON* */
+};
+
+
+struct enumdesc
+{
+	const char *name;
+	int value;
+};
+
+static struct enumdesc tracereq_desc[] = {
+	{ "no",     0 },
+	{ "common", afb_hook_flags_req_common },
+	{ "extra",  afb_hook_flags_req_extra },
+	{ "all",    afb_hook_flags_req_all },
+	{ NULL, 0 }
+};
+
+static struct enumdesc mode_desc[] = {
+	{ "local",  AFB_MODE_LOCAL },
+	{ "remote", AFB_MODE_REMOTE },
+	{ "global", AFB_MODE_GLOBAL },
+	{ NULL, 0 }
+};
+
+/*----------------------------------------------------------
+ | printversion
+ |   print version and copyright
+ +--------------------------------------------------------- */
+static void printVersion(FILE * file)
+{
+	fprintf(file, "\n----------------------------------------- \n");
+	fprintf(file, "  AFB [Application Framework Binder] version=%s |\n",
+		AFB_VERSION);
+	fprintf(file, " \n");
+	fprintf(file,
+		"  Copyright (C) 2015, 2016, 2017 \"IoT.bzh\" [fulup -at- iot.bzh]\n");
+	fprintf(file, "  AFB comes with ABSOLUTELY NO WARRANTY.\n");
+	fprintf(file, "  Licence Apache 2\n\n");
+	exit(0);
+}
+
+/*----------------------------------------------------------
+ | printHelp
+ |   print information from long option array
+ +--------------------------------------------------------- */
+
+static void printHelp(FILE * file, const char *name)
+{
+	int ind;
+	char command[50];
+
+	fprintf(file, "%s:\nallowed options\n", name);
+	for (ind = 0; cliOptions[ind].name != NULL; ind++) {
+		strcpy(command, cliOptions[ind].name);
+		if (cliOptions[ind].has_arg)
+			strcat(command, "=xxxx");
+		fprintf(file, "  --%-15s %s\n", command, cliOptions[ind].help);
+	}
+	fprintf(file,
+		"Example:\n  %s\\\n  --verbose --port=1234 --token='azerty' --ldpaths=build/bindings:/usr/lib64/agl/bindings\n",
+		name);
+}
+
+// load config from disk and merge with CLI option
+static void config_set_default(struct afb_config *config)
+{
+	// default HTTP port
+	if (config->httpdPort == 0)
+		config->httpdPort = 1234;
+
+	// default binding API timeout
+	if (config->apiTimeout == 0)
+		config->apiTimeout = DEFLT_API_TIMEOUT;
+
+	// default AUTH_TOKEN
+	if (config->token == NULL)
+		config->token = DEFLT_AUTH_TOKEN;
+
+	// cache timeout default one hour
+	if (config->cacheTimeout == 0)
+		config->cacheTimeout = DEFLT_CACHE_TIMEOUT;
+
+	// cache timeout default one hour
+	if (config->cntxTimeout == 0)
+		config->cntxTimeout = DEFLT_CNTX_TIMEOUT;
+
+	// max count of sessions
+	if (config->nbSessionMax == 0)
+		config->nbSessionMax = CTX_NBCLIENTS;
+
+	if (config->rootdir == NULL) {
+		config->rootdir = getenv("AFBDIR");
+		if (config->rootdir == NULL) {
+			config->rootdir = malloc(512);
+			strncpy(config->rootdir, getenv("HOME"), 512);
+			strncat(config->rootdir, "/.AFB", 512);
+		}
+	}
+	// if no Angular/HTML5 rootbase let's try '/' as default
+	if (config->rootbase == NULL)
+		config->rootbase = "/opa";
+
+	if (config->rootapi == NULL)
+		config->rootapi = "/api";
+
+	if (config->ldpaths == NULL)
+		config->ldpaths = BINDING_INSTALL_DIR;
+
+	// if no session dir create a default path from rootdir
+	if (config->sessiondir == NULL) {
+		config->sessiondir = malloc(512);
+		strncpy(config->sessiondir, config->rootdir, 512);
+		strncat(config->sessiondir, "/sessions", 512);
+	}
+	// if no config dir create a default path from sessiondir
+	if (config->console == NULL) {
+		config->console = malloc(512);
+		strncpy(config->console, config->sessiondir, 512);
+		strncat(config->console, "/AFB-console.out", 512);
+	}
+}
+
+/*---------------------------------------------------------
+ | main
+ |   Parse option and launch action
+ +--------------------------------------------------------- */
+
+static void list_add(struct afb_config_list **head, char *value)
+{
+	struct afb_config_list *item;
+
+	/*
+	 * search tail 
+	 */
+	item = *head;
+	while (item != NULL) {
+		head = &item->next;
+		item = item->next;
+	}
+
+	/*
+	 * alloc the item 
+	 */
+	item = malloc(sizeof *item);
+	if (item == NULL) {
+		ERROR("out of memory");
+		exit(1);
+	}
+
+	/*
+	 * init the item 
+	 */
+	*head = item;
+	item->value = value;
+	item->next = NULL;
+}
+
+static char *argvalstr(int index)
+{
+	if (optarg == 0) {
+		ERROR("option [--%s] needs a value i.e. --%s=xxx",
+		      cliOptions[index].name, cliOptions[index].name);
+		exit(1);
+	}
+	return optarg;
+}
+
+static int argvalenum(int index, struct enumdesc *desc)
+{
+	int i;
+	size_t len;
+	char *list, *name = argvalstr(index);
+
+	i = 0;
+	while(desc[i].name && strcmp(desc[i].name, name))
+		i++;
+	if (!desc[i].name) {
+		len = 0;
+		i = 0;
+		while(desc[i].name)
+			len += strlen(desc[i++].name);
+		list = malloc(len + i + i);
+		if (!i || !list)
+			ERROR("option [--%s] bad value (found %s)",
+				cliOptions[index].name, name);
+		else {
+			i = 0;
+			strcpy(list, desc[i].name ? : "");
+			while(desc[++i].name)
+				strcat(strcat(list, ", "), desc[i].name);
+			ERROR("option [--%s] bad value, only accepts values %s (found %s)",
+				cliOptions[index].name, list, name);
+		}
+		free(list);
+		exit(1);
+	}
+	return desc[i].value;
+}
+
+static int argvalint(int index, int mini, int maxi, int base)
+{
+	char *beg, *end;
+	long int val;
+	beg = argvalstr(index);
+	val = strtol(beg, &end, base);
+	if (*end || end == beg) {
+		ERROR("option [--%s] requires a valid integer (found %s)",
+			cliOptions[index].name, beg);
+		exit(1);
+	}
+	if (val < (long int)mini || val > (long int)maxi) {
+		ERROR("option [--%s] value out of bounds (not %d<=%ld<=%d)",
+			cliOptions[index].name, mini, val, maxi);
+		exit(1);
+	}
+	return (int)val;
+}
+
+static int argvalintdec(int index, int mini, int maxi)
+{
+	return argvalint(index, mini, maxi, 10);
+}
+
+static void noarg(int index)
+{
+	if (optarg != 0) {
+		ERROR("option [--%s] need no value (found %s)", cliOptions[index].name, optarg);
+		exit(1);
+	}
+}
+
+static void parse_arguments(int argc, char **argv, struct afb_config *config)
+{
+	char *programName = argv[0];
+	int optionIndex = 0;
+	int optc, ind;
+	int nbcmd;
+	struct option *gnuOptions;
+
+	// ------------------ Process Command Line -----------------------
+
+	// if no argument print help and return
+	if (argc < 2) {
+		printHelp(stderr, programName);
+		exit(1);
+	}
+	// build GNU getopt info from cliOptions
+	nbcmd = sizeof(cliOptions) / sizeof(AFB_options);
+	gnuOptions = malloc(sizeof(*gnuOptions) * (unsigned)nbcmd);
+	for (ind = 0; ind < nbcmd; ind++) {
+		gnuOptions[ind].name = cliOptions[ind].name;
+		gnuOptions[ind].has_arg = cliOptions[ind].has_arg;
+		gnuOptions[ind].flag = 0;
+		gnuOptions[ind].val = cliOptions[ind].val;
+	}
+
+	// get all options from command line
+	while ((optc =
+		getopt_long(argc, argv, "vsp?", gnuOptions, &optionIndex))
+	       != EOF) {
+		switch (optc) {
+		case SET_VERBOSE:
+			verbosity++;
+			break;
+
+		case SET_TCP_PORT:
+			config->httpdPort = argvalintdec(optionIndex, 1024, 32767);
+			break;
+
+		case SET_APITIMEOUT:
+			config->apiTimeout = argvalintdec(optionIndex, 0, INT_MAX);
+			break;
+
+		case SET_CNTXTIMEOUT:
+			config->cntxTimeout = argvalintdec(optionIndex, 0, INT_MAX);
+			break;
+
+		case SET_ROOT_DIR:
+			config->rootdir = argvalstr(optionIndex);
+			INFO("Forcing Rootdir=%s", config->rootdir);
+			break;
+
+		case SET_ROOT_HTTP:
+			config->roothttp = argvalstr(optionIndex);
+			INFO("Forcing Root HTTP=%s", config->roothttp);
+			break;
+
+		case SET_ROOT_BASE:
+			config->rootbase = argvalstr(optionIndex);
+			INFO("Forcing Rootbase=%s", config->rootbase);
+			break;
+
+		case SET_ROOT_API:
+			config->rootapi = argvalstr(optionIndex);
+			INFO("Forcing Rootapi=%s", config->rootapi);
+			break;
+
+		case SET_ALIAS:
+			list_add(&config->aliases, argvalstr(optionIndex));
+			break;
+
+		case SET_AUTH_TOKEN:
+			config->token = argvalstr(optionIndex);
+			break;
+
+		case SET_LDPATH:
+			config->ldpaths = argvalstr(optionIndex);
+			break;
+
+		case SET_SESSION_DIR:
+			config->sessiondir = argvalstr(optionIndex);
+			break;
+
+		case SET_CACHE_TIMEOUT:
+			config->cacheTimeout = argvalintdec(optionIndex, 0, INT_MAX);
+			break;
+
+		case SET_SESSIONMAX:
+			config->nbSessionMax = argvalintdec(optionIndex, 1, INT_MAX);
+			break;
+
+		case SET_FORGROUND:
+			noarg(optionIndex);
+			config->background = 0;
+			break;
+
+		case SET_BACKGROUND:
+			noarg(optionIndex);
+			config->background = 1;
+			break;
+
+		case SET_MODE:
+			config->mode = argvalenum(optionIndex, mode_desc);
+			break;
+
+		case SET_READYFD:
+			config->readyfd = argvalintdec(optionIndex, 0, INT_MAX);
+			break;
+
+		case DBUS_CLIENT:
+			list_add(&config->dbus_clients, argvalstr(optionIndex));
+			break;
+
+		case DBUS_SERVICE:
+			list_add(&config->dbus_servers, argvalstr(optionIndex));
+			break;
+
+		case WS_CLIENT:
+			list_add(&config->ws_clients, argvalstr(optionIndex));
+			break;
+
+		case WS_SERVICE:
+			list_add(&config->ws_servers, argvalstr(optionIndex));
+			break;
+
+		case SO_BINDING:
+			list_add(&config->so_bindings, argvalstr(optionIndex));
+			break;
+
+		case SET_TRACEREQ:
+			config->tracereq = argvalenum(optionIndex, tracereq_desc);
+			break;
+
+		case DISPLAY_VERSION:
+			noarg(optionIndex);
+			printVersion(stdout);
+			break;
+
+		case DISPLAY_HELP:
+		default:
+			printHelp(stdout, programName);
+			exit(0);
+		}
+	}
+	free(gnuOptions);
+
+	config_set_default(config);
+}
+
+struct afb_config *afb_config_parse_arguments(int argc, char **argv)
+{
+	struct afb_config *result;
+
+	result = calloc(1, sizeof *result);
+
+	parse_arguments(argc, argv, result);
+	return result;
+}