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-rw-r--r--src/CMakeLists.txt8
-rw-r--r--src/error/CMakeLists.txt6
-rw-r--r--src/error/error.h143
-rw-r--r--src/main.c209
-rw-r--r--src/pervasive.h28
5 files changed, 394 insertions, 0 deletions
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
new file mode 100644
index 0000000..f99ceed
--- /dev/null
+++ b/src/CMakeLists.txt
@@ -0,0 +1,8 @@
+add_subdirectory(error)
+
+set(
+ SRC_FILES ${SRC_FILES}
+ ${CMAKE_CURRENT_SOURCE_DIR}/main.c
+)
+
+set(SRC_FILES ${SRC_FILES} PARENT_SCOPE)
diff --git a/src/error/CMakeLists.txt b/src/error/CMakeLists.txt
new file mode 100644
index 0000000..fa07534
--- /dev/null
+++ b/src/error/CMakeLists.txt
@@ -0,0 +1,6 @@
+set(
+ SRC_FILES ${SRC_FILES}
+)
+
+set(SRC_FILES ${SRC_FILES} PARENT_SCOPE)
+
diff --git a/src/error/error.h b/src/error/error.h
new file mode 100644
index 0000000..145c838
--- /dev/null
+++ b/src/error/error.h
@@ -0,0 +1,143 @@
+#ifndef _JH_ERROR_ERROR_H_
+#define _JH_ERROR_ERROR_H_
+
+#include <stdio.h>
+
+#include "../pervasive.h"
+
+#ifndef JH_DEBUG_PROGRAM_FLOW
+ #define JH_DEBUG_PROGRAM_FLOW (0 || JH_DEBUG_ALL)
+#endif
+
+#ifndef JH_DEBUG_CONFIG
+ #define JH_DEBUG_CONFIG (0 || JH_DEBUG_ALL)
+#endif
+
+#ifndef JH_DEBUG_LEARNING
+ #define JH_DEBUG_LEARNING (0 || JH_DEBUG_ALL)
+#endif
+
+#ifndef JH_DEBUG_NETWORK
+ #define JH_DEBUG_NETWORK 1
+#endif
+
+#ifndef JH_DEBUG_NETWORK
+ #define JH_DEBUG_NETWORK (0 || JH_DEBUG_ALL)
+#endif
+
+#define JH_ENABLE_WARNINGS_OUTPUT 1
+#define JH_ENABLE_RUNTIME_ERRORS_OUTPUT 1
+#define JH_ENABLE_PROGRAMMING_ERRORS_OUTPUT 1
+#define JH_ENABLE_FATAL_ERROR_OUTPUT 1
+
+#ifdef JH_ENABLE_ERROR_LOCATION
+ #define JH_LOCATION " [" __FILE__ "][" JH_TO_STRING(__LINE__) "]"
+#else
+ #define JH_LOCATION ""
+#endif
+
+#define JH_PRINT_STDERR(io, symbol, str, ...)\
+ fprintf(io, "[" symbol "]" JH_LOCATION " " str "\n", __VA_ARGS__);
+
+/*
+ * Given that we use preprocessor contants as flags, we can expect the compilers
+ * to remove the test condition for disabled flags. No need to be shy about
+ * allowing many debug options.
+ */
+
+#define JH_DEBUG(io, flag, str, ...)\
+ JH_ISOLATE\
+ (\
+ if (flag)\
+ {\
+ JH_PRINT_STDERR(io, "D", str, __VA_ARGS__);\
+ }\
+ )
+
+
+#define JH_WARNING(io, str, ...)\
+ JH_ISOLATE\
+ (\
+ if (JH_ENABLE_WARNINGS_OUTPUT)\
+ {\
+ JH_PRINT_STDERR(io, "W", str, __VA_ARGS__);\
+ }\
+ )
+
+#define JH_ERROR(io, str, ...)\
+ JH_ISOLATE\
+ (\
+ if (JH_ENABLE_RUNTIME_ERRORS_OUTPUT)\
+ {\
+ JH_PRINT_STDERR(io, "E", str, __VA_ARGS__);\
+ }\
+ )
+
+#define JH_PROG_ERROR(io, str, ...)\
+ JH_ISOLATE\
+ (\
+ if (JH_ENABLE_PROGRAMMING_ERRORS_OUTPUT)\
+ {\
+ JH_PRINT_STDERR(io, "P", str, __VA_ARGS__);\
+ }\
+ )
+
+#define JH_FATAL(io, str, ...)\
+ JH_ISOLATE\
+ (\
+ if (JH_ENABLE_FATAL_ERROR_OUTPUT)\
+ {\
+ JH_PRINT_STDERR(io, "F", str, __VA_ARGS__);\
+ }\
+ )
+
+/* For outputs without dynamic content (static). ******************************/
+
+#define JH_PRINT_S_STDERR(io, symbol, str)\
+ fprintf(io, "[" symbol "]" JH_LOCATION " " str "\n");
+
+#define JH_S_DEBUG(io, flag, str)\
+ JH_ISOLATE\
+ (\
+ if (flag)\
+ {\
+ JH_PRINT_S_STDERR(io, "D", str);\
+ }\
+ )
+
+#define JH_S_WARNING(io, str)\
+ JH_ISOLATE\
+ (\
+ if (JH_ENABLE_WARNINGS_OUTPUT)\
+ {\
+ JH_PRINT_S_STDERR(io, "W", str);\
+ }\
+ )
+
+#define JH_S_ERROR(io, str)\
+ JH_ISOLATE\
+ (\
+ if (JH_ENABLE_RUNTIME_ERRORS_OUTPUT)\
+ {\
+ JH_PRINT_S_STDERR(io, "E", str);\
+ }\
+ )
+
+#define JH_S_PROG_ERROR(io, str)\
+ JH_ISOLATE\
+ (\
+ if (JH_ENABLE_PROGRAMMING_ERRORS_OUTPUT)\
+ {\
+ JH_PRINT_S_STDERR(io, "P", str);\
+ }\
+ )
+
+#define JH_S_FATAL(io, str)\
+ JH_ISOLATE\
+ (\
+ if (JH_ENABLE_FATAL_ERROR_OUTPUT)\
+ {\
+ JH_PRINT_S_STDERR(io, "F", str);\
+ }\
+ )
+#endif
diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..9b8be44
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,209 @@
+#include <sys/socket.h>
+#include <sys/un.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+
+#include "error/error.h"
+
+#include "pervasive.h"
+
+static void print_help (const char runnable [])
+{
+ printf
+ (
+ "JabberHive - CLI Gateway\n"
+ "Software Version %d\n"
+ "Protocol Version %d\n"
+ "\nUsages:\n"
+ " JH GATEWAY:\t%s SOCKET_NAME\n"
+ " SHOW HELP:\tAnything else\n"
+ "\nParameters:\n"
+ " SOCKET_NAME: valid UNIX socket.\n",
+ JH_PROGRAM_VERSION,
+ JH_PROTOCOL_VERSION,
+ runnable
+ );
+}
+
+static int open_socket
+(
+ FILE * s [const restrict static 1],
+ const char socket_name [const restrict static 1]
+)
+{
+ int fd;
+ struct sockaddr_un addr;
+
+ const int old_errno = errno;
+
+ errno = 0;
+
+ if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
+ {
+ JH_FATAL
+ (
+ stderr,
+ "Unable to create socket: %s.",
+ strerror(errno)
+ );
+
+ errno = old_errno;
+
+ return -1;
+ }
+
+ errno = old_errno;
+
+ memset(&addr, 0, sizeof(addr));
+ addr.sun_family = AF_UNIX;
+ strncpy(addr.sun_path, socket_name, sizeof(addr.sun_path)-1);
+
+ errno = 0;
+
+ if (connect(fd, (struct sockaddr*)&addr, sizeof(addr)) == -1)
+ {
+ JH_FATAL
+ (
+ stderr,
+ "Unable to connect to address: %s.",
+ strerror(errno)
+ );
+
+ errno = old_errno;
+
+ close(fd);
+
+ return -1;
+ }
+
+ errno = 0;
+
+ *s = fdopen(fd, "w+");
+
+ if (*s == (FILE *) NULL)
+ {
+ JH_FATAL
+ (
+ stderr,
+ "Unable to open socket as a file: %s.",
+ strerror(errno)
+ );
+
+ errno = old_errno;
+
+ close(fd);
+
+ return -1;
+ }
+
+ errno = old_errno;
+
+ return 0;
+}
+
+static void gateway
+(
+ FILE socket [const restrict static 1]
+)
+{
+ int is_sending;
+ int data, data_prev, is_last_message;
+
+ is_sending = 1;
+
+ for (;;)
+ {
+ if (is_sending)
+ {
+ data = fgetc(stdin);
+
+ if (data == EOF)
+ {
+ return;
+ }
+ else
+ {
+ if (fputc(data, socket) == EOF)
+ {
+ JH_S_FATAL(stderr, "Unable to write to socket.");
+
+ return;
+ }
+ }
+
+ if (data == '\n')
+ {
+ is_sending = 0;
+ data = 0;
+ is_last_message = 0;
+ }
+ }
+ else
+ {
+ data_prev = data;
+ data = fgetc(socket);
+
+ if (data == EOF)
+ {
+ JH_S_FATAL(stderr, "Unable to read from socket.");
+
+ return;
+ }
+ else
+ {
+ if (fputc(data, stdout) == EOF)
+ {
+ /* ... seems like it wouldn't work. */
+ JH_S_FATAL(stderr, "Unable to write to stdout.");
+
+ return;
+ }
+ }
+
+ is_last_message =
+ (
+ is_last_message
+ || (
+ (data_prev == '!')
+ && (
+ (data == 'P')
+ || (data == 'N')
+ )
+ // TODO: check for the ' '.
+ )
+ );
+
+ if (is_last_message && (data == '\n'))
+ {
+ is_sending = 1;
+ }
+ }
+ }
+}
+
+int main (int const argc, const char * argv [const static argc])
+{
+ FILE * socket;
+
+ if (argc != 2)
+ {
+ print_help(argv[0]);
+
+ return -1;
+ }
+
+ if (open_socket(&socket, argv[1]) < 0)
+ {
+ return -1;
+ }
+
+ gateway(socket);
+
+ fclose(socket);
+
+ return 0;
+}
diff --git a/src/pervasive.h b/src/pervasive.h
new file mode 100644
index 0000000..27d832d
--- /dev/null
+++ b/src/pervasive.h
@@ -0,0 +1,28 @@
+#ifndef _JH_PERVASIVE_H_
+#define _JH_PERVASIVE_H_
+
+#include <string.h>
+
+#define JH_PROGRAM_VERSION 1
+#define JH_PROTOCOL_VERSION 1
+
+#ifdef __FRAMA_C__
+ #define JH_RUNNING_FRAMA_C 1
+#endif
+
+#define JH_DEBUG_ALL 1
+
+#ifndef JH_DEBUG_ALL
+ #define JH_DEBUG_ALL 0
+#endif
+
+#define JH__TO_STRING(x) #x
+#define JH_TO_STRING(x) JH__TO_STRING(x)
+#define JH_ISOLATE(a) do {a} while (0)
+
+/* strncmp stops at '\0' and strlen does not count '\0'. */
+#define JH_IS_PREFIX(a, b) (strncmp(a, b, strlen(a)) == 0)
+
+#define JH_STRING_EQUALS(a, b) (strcmp(a, b) == 0)
+
+#endif