Add basic agent implementaion and surgard template

project.mk

@@ -70,6 +70,8 @@ PROJECT_CFLAGS  = -D_POSIX_C_SOURCE=200809L
 PROJECT_CFLAGS += -D_ISOC99_SOURCE
 PROJECT_CFLAGS += -D_XOPEN_SOURCE=500
 PROJECT_CFLAGS += -D_GNU_SOURCE
+
+PROJECT_CFLAGS += -DARC_WITH_SURGARD
 # PROJECT_CFLAGS += -DDEBUG
 
 

src/agent.c

@@ -12,33 +12,192 @@
  *
  * @see https://lowenware.com/
  */
-
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+#include <cStuff/string.h>
 #include "surgard.h"
+#include "log.h"
 #include "agent.h"
 
+#define LOG_PREFIX "agent: "
 
-int
-agent_init(void)
+
+static struct agent **m_agent = NULL;
+static int m_count = 0;
+static unsigned char m_buffer[ARC_AGENT_BUFFER_SIZE];
+
+
+static struct agent *
+agent__new(AgentType agent_type, const char *name, char *address, char *query)
 {
-	return 0;
+	struct agent *result = NULL;
+
+	switch (agent_type) {
+#ifdef ARC_WITH_SURGARD
+	case AGENT_TYPE_SURGARD:
+		result = surgard_new(agent_type, name, address, query);
+		break;
+#endif 
+	default:
+		break;
+	}
+	return result;
+}
+
+
+static void
+agent__free(struct agent *agent)
+{
+	switch (agent->agent_type) {
+#ifdef ARC_WITH_SURGARD
+	case AGENT_TYPE_SURGARD:
+		surgard_free(agent);
+		break;
+#endif
+	default:
+		break;
+	}
+
+	if (agent->name) {
+		free(agent->name);
+	}
+
+	free(agent);
+}
+
+
+static int
+agent__run(struct agent *agent, unsigned char *buffer, size_t buf_size)
+{
+	switch (agent->agent_type) {
+#ifdef ARC_WITH_SURGARD
+	case AGENT_TYPE_SURGARD:
+		return surgard_run(agent, m_buffer, sizeof (m_buffer));
+#endif 
+	default:
+		break;
+	}
+	return 1;
+}
+
+
+static AgentType
+agent_read_uri(char **p_uri, char **p_query)
+{
+	char *protocol = *p_uri, *address, *query;
+
+	if (!(address = strstr(protocol, "://"))) {
+		return AGENT_TYPE__UNKNOWN;
+	}
+
+	*address = 0;
+	address += 3;
+
+	if ((query = strchr(address, '?'))) {
+		*(address++) = 0;
+	}
+	*p_query = query;
+	*p_uri = address;
+
+#ifdef ARC_WITH_SURGARD 
+	if (surgard_supports(protocol)) {
+		return AGENT_TYPE_SURGARD;
+	}
+#endif
+
+	*p_uri = protocol;
+	return AGENT_TYPE__UNKNOWN;
+}
+
+
+struct agent *
+agent_alloc(const char *p_name, AgentType agent_type, size_t sz)
+{
+	struct agent *result;
+	char *name;
+
+	if (!cstuff_strcpy(&name, p_name)) {
+		if ((result = calloc(1, sz))) {
+			result->name = name;
+			result->agent_type = agent_type;
+			return result;
+		}
+		free(name);
+	} else {
+		result = NULL;
+	}
+	return result;
 }
 
 
 void
-agent_release(void)
+agent_free(struct agent *agent)
 {
-
+	if (agent->name)
+		free(agent->name);
+	free(agent);
 }
 
 
 int
-agent_run_cycle(void)
+agent_set(const char *name, char *uri)
 {
-	int result = 1, rc;
+	char *query;
+	AgentType agent_type;
+	struct agent **agent;
 
-	if (!(rc = surgard_run_cycle())) {
-		result = rc;
+	if (!(agent_type = agent_read_uri(&uri, &query))) {
+		LOG_ALERT(LOG_PREFIX "unsupported protocol `%s`", uri);
+		return -1;
+	}
+
+	/* uri = address */
+	if (!(agent = realloc(m_agent, sizeof (*agent) * (++m_count)))) {
+		LOG_ALERT(LOG_PREFIX "out of memory (%d ports)", m_count);
+		m_count--;
+		return -1;
+	}
+
+	m_agent = agent;
+
+	if (!(agent[m_count - 1] = agent__new(agent_type, name, uri, query))) {
+		return -1;
+	}
+
+	return 0;
+}
+
+
+int
+agent_run(void)
+{
+	int result = 1, i, rc;
+
+	for (i = 0; i < m_count; i++) {
+		memset(m_buffer, 0, sizeof (m_buffer));
+		if (!(rc = agent__run(m_agent[i], m_buffer, sizeof (m_buffer)))) {
+			result = rc;
+		}
 	}
 
 	return result;
 }
+
+
+void
+agent_unset_all(void)
+{
+	int i;
+
+	for (i = 0; i < m_count; i++) {
+		agent__free(m_agent[i]);
+	}
+
+	if (m_agent) {
+		free(m_agent);
+		m_count = 0;
+		m_agent = NULL;
+	}
+}
+

src/agent.h

@@ -16,16 +16,46 @@
 #ifndef AGENT_H_D0CDB429_AC49_4BC6_83FA_9163404D387E
 #define AGENT_H_D0CDB429_AC49_4BC6_83FA_9163404D387E
 
+#include <stdbool.h>
 
-int
-agent_init(void);
+
+#ifndef ARC_AGENT_BUFFER_SIZE
+#define ARC_AGENT_BUFFER_SIZE (4*1024)
+#endif
+
+
+typedef enum {
+	AGENT_TYPE__UNKNOWN
+#ifdef ARC_WITH_SURGARD
+	, AGENT_TYPE_SURGARD
+#endif
+} AgentType;
+
+
+struct agent {
+	char *name;
+	AgentType agent_type;
+};
+
+
+struct agent *
+agent_alloc(const char *name, AgentType agent_type, size_t sz);
 
 
 void
-agent_release(void);
+agent_free(struct agent *agent);
 
 
 int
-agent_run_cycle(void);
+agent_set(const char *name, char *uri);
+
+
+int
+agent_run(void);
+
+
+void
+agent_unset_all(void);
+
 
 #endif /* !AGENT_H */

src/main.c

@@ -112,25 +112,21 @@ main(int argc, char **argv)
 	/* Initialize instance */
 	if ((aisl = aisl_new(&m_cfg)) != NULL) {
 		if (observer_init() == 0) {
-			if (agent_init() == 0) {
-				/* launch application loop */
-				fprintf(stdout, "Entering main loop");
-				for(;;) {
-					int rc, do_sleep = 1;
+			/* launch application loop */
+			fprintf(stdout, "Entering main loop");
+			for(;;) {
+				int rc, do_sleep = 1;
+				if ((rc = aisl_run_cycle(aisl)) == AISL_SUCCESS)
+					do_sleep = 0;
+				if ((rc = agent_run()) == 0)
+					do_sleep = 0;
 
-					if ((rc = aisl_run_cycle(aisl)) == AISL_SUCCESS)
-						do_sleep = 0;
+				if (!do_sleep)
+					continue;
 
-					if ((rc = agent_run_cycle()) == 0)
-						do_sleep = 0;
-
-					if (!do_sleep)
-						continue;
-
-					aisl_sleep(aisl, 500);
-				}
-				agent_release();
+				aisl_sleep(aisl, 500);
 			}
+			agent_unset_all();
 			observer_release();
 		}
 		aisl_free(aisl);

src/surgard.c

@@ -13,13 +13,43 @@
  * @see https://lowenware.com/
  */
 
+#include <string.h>
 #include "surgard.h"
 
 
-int
-surgard_run_cycle(void)
+struct surgard {
+	struct agent parent;
+};
+
+
+bool
+surgard_supports(const char *protocol)
 {
-	return 1;
+	return !strcmp(protocol, "surgard");
 }
 
 
+struct agent *
+surgard_new(AgentType agent_type, const char *name, char *address, char *params)
+{
+	struct agent *agent;
+
+	if ((agent = agent_alloc(name, agent_type, sizeof (struct surgard)))) {
+
+	}
+	return agent;
+}
+
+
+void
+surgard_free(struct agent *agent)
+{
+	agent_free(agent);
+}
+
+
+int
+surgard_run(struct agent *agent, unsigned char *buffer, size_t buf_sz)
+{
+	return 1;
+}

src/surgard.h

@@ -16,7 +16,22 @@
 #ifndef SURGARD_H_0C382373_4757_4FC1_A2DE_991F9D71CDBC
 #define SURGARD_H_0C382373_4757_4FC1_A2DE_991F9D71CDBC
 
+#include "agent.h"
+
+
+struct agent *
+surgard_new(AgentType agent_type, const char *name, char *address, char *params);
+
+
+void
+surgard_free(struct agent *agent);
+
+
 int
-surgard_run_cycle(void);
+surgard_run(struct agent *agent, unsigned char *buffer, size_t buf_sz);
+
+
+bool
+surgard_supports(const char *protocol);
 
 #endif /* !SURGARD_H */