Add /api/version

Signed-off-by: DL6ER <dl6er@dl6er.de>

.gitignore

@@ -5,7 +5,8 @@
 pihole-FTL
 
 # Versioning files (generated by Makefile)
-version*
+version.h
+version~
 
 # CMake files
 /cmake-build-debug/

Makefile

@@ -17,7 +17,7 @@ DNSMASQ_OPTS = -DHAVE_DNSSEC -DHAVE_DNSSEC_STATIC -DHAVE_IDN
 FTL_DEPS = *.h database/*.h api/*.h version.h
 FTL_DB_OBJ = database/common.o database/query-table.o database/network-table.o database/gravity-db.o database/database-thread.o \
              database/sqlite3-ext.o database/message-table.o
-FTL_API_OBJ = api/http.o api/ftl.o api/stats.o api/dns.o
+FTL_API_OBJ = api/http.o api/ftl.o api/stats.o api/dns.o api/version.o
 FTL_OBJ = $(FTL_DB_OBJ) $(FTL_API_OBJ) main.o memory.o log.o daemon.o datastructure.o signals.o files.o setupVars.o args.o gc.o config.o dnsmasq_interface.o resolve.o regex.o shmem.o capabilities.o overTime.o timers.o vector.o
 
 DNSMASQ_DEPS = config.h dhcp-protocol.h dns-protocol.h radv-protocol.h dhcp6-protocol.h dnsmasq.h ip6addr.h metrics.h ../dnsmasq_interface.h

src/FTL.h

@@ -128,4 +128,7 @@ extern pthread_t DBthread;
 extern pthread_t GCthread;
 extern pthread_t DNSclientthread;
 
+// Intentionally ignore result of function declared warn_unused_result
+#define igr(x) {__typeof__(x) __attribute__((unused)) d=(x);} 
+
 #endif // FTL_H

src/api/api.h

@@ -41,4 +41,7 @@ int api_dns_blacklist(struct mg_connection *conn);
 int api_dns_blacklist_exact(struct mg_connection *conn);
 int api_dns_blacklist_regex(struct mg_connection *conn);
 
+// Version method
+int api_version(struct mg_connection *conn);
+
 #endif // API_H

src/api/http.c

@@ -156,6 +156,11 @@ static int api_handler(struct mg_connection *conn, void *ignored)
 	{
 		ret = api_stats_recentblocked(conn);
 	}
+	/******************************** api/version ****************************/
+	else if(strcasecmp("/api/version", request->local_uri) == 0)
+	{
+		ret = api_version(conn);
+	}
 	/******************************** not found ******************************/
 /*	else
 	{

src/api/version.c

@@ -0,0 +1,64 @@
+/* Pi-hole: A black hole for Internet advertisements
+*  (c) 2019 Pi-hole, LLC (https://pi-hole.net)
+*  Network-wide ad blocking via your own hardware.
+*
+*  FTL Engine
+*  API Implementation /api/version
+*
+*  This file is copyright under the latest version of the EUPL.
+*  Please see LICENSE file for your rights under this license. */
+
+#include "FTL.h"
+#include "api.h"
+// get_FTL_version()
+#include "log.h"
+#include "version.h"
+
+int api_version(struct mg_connection *conn)
+{
+	cJSON *json = JSON_NEW_OBJ();
+
+	cJSON *api = JSON_NEW_OBJ();
+	JSON_OBJ_REF_STR(api, "branch", "none");
+	JSON_OBJ_REF_STR(api, "hash", "none");
+	JSON_OBJ_REF_STR(api, "tag", "none");
+	JSON_OBJ_ADD_ITEM(json, "api", api);
+
+	FILE* file;
+	char coreversion[256] = "N/A";
+	char webversion[256]  = "N/A";
+	if((file = fopen("/etc/pihole/localversions", "r")) != NULL)
+	{
+		igr(fscanf(file, "%255s %255s", coreversion, webversion));
+		fclose(file);
+	}
+	char corebranch[256] = "N/A";
+	char webbranch[256]  = "N/A";
+	if((file = fopen("/etc/pihole/localbranches", "r")) != NULL)
+	{
+		igr(fscanf(file, "%255s %255s", corebranch, webbranch));
+		fclose(file);
+	}
+
+	cJSON *web = JSON_NEW_OBJ();
+	JSON_OBJ_REF_STR(web, "branch", webbranch);
+	JSON_OBJ_REF_STR(web, "hash", "none");
+	JSON_OBJ_REF_STR(web, "tag", webversion);
+	JSON_OBJ_ADD_ITEM(json, "web", web);
+
+	cJSON *core = JSON_NEW_OBJ();
+	JSON_OBJ_REF_STR(core, "branch", corebranch);
+	JSON_OBJ_REF_STR(core, "hash", "none");
+	JSON_OBJ_REF_STR(core, "tag", coreversion);
+	JSON_OBJ_ADD_ITEM(json, "core", core);
+
+	cJSON *ftl = JSON_NEW_OBJ();
+	JSON_OBJ_REF_STR(ftl, "branch", GIT_BRANCH);
+	JSON_OBJ_REF_STR(ftl, "hash", GIT_HASH);
+	char *version = get_FTL_version();
+	JSON_OBJ_COPY_STR(ftl, "tag", version);
+	JSON_OBJ_ADD_ITEM(json, "ftl", ftl);
+	free(version);
+
+	JSON_SENT_OBJECT(json);
+}

src/log.c

@@ -161,7 +161,7 @@ void log_FTL_version(const bool crashreport)
 }
 
 static char *FTLversion = NULL;
-const char __attribute__ ((malloc)) *get_FTL_version(void)
+char __attribute__ ((malloc)) *get_FTL_version(void)
 {
 	// Obtain FTL version if not already determined
 	if(FTLversion == NULL)

src/log.h

@@ -17,7 +17,7 @@ void open_FTL_log(const bool test);
 void logg(const char* format, ...) __attribute__ ((format (gnu_printf, 1, 2)));
 void log_counter_info(void);
 void format_memory_size(char *prefix, unsigned long long int bytes, double *formated);
-const char *get_FTL_version(void) __attribute__ ((malloc));
+char *get_FTL_version(void) __attribute__ ((malloc));
 void log_FTL_version(bool crashreport);
 void get_timestr(char *timestring, const time_t timein);