start declaring other sorts of block structures

include/hexagram/pcapng.h

@@ -4,6 +4,9 @@
 #include <stdint.h>
 #include <sys/types.h>
 
+/*
+ * pcapng reader error states
+ */
 enum {
     HEXAGRAM_PCAPNG_ERROR_OK        = 0,
     HEXAGRAM_PCAPNG_ERROR_IO        = 1,
@@ -12,14 +15,67 @@ enum {
     HEXAGRAM_PCAPNG_ERROR_HANDLER   = 4
 } hexagram_pcapng_error;
 
-typedef struct _hexagram_pcapng_header {
+/*
+ * pcapng block option types and structure
+ */
+enum {
+    HEXAGRAM_PCAPNG_OPTION_END     = 0,
+    HEXAGRAM_PCAPNG_OPTION_COMMENT = 1,
+    HEXAGRAM_PCAPNG_OPTION_CUSTOM1 = 0x0bac,
+    HEXAGRAM_PCAPNG_OPTION_CUSTOM2 = 0x0bad,
+    HEXAGRAM_PCAPNG_OPTION_CUSTOM3 = 0x4bac,
+    HEXAGRAM_PCAPNG_OPTION_CUSTOM4 = 0x4bad
+} hexagram_pcapng_option_type;
+
+typedef struct _hexagram_pcapng_option {
+    uint16_t code,
+             length;
+} hexagram_pcapng_option;
+
+/*
+ * pcapng block types and structure
+ */
+enum {
+    HEXAGRAM_PCAPNG_BLOCK_SECTION   = 0x0a0d0d0a,
+    HEXAGRAM_PCAPNG_BLOCK_INTERFACE = 0x1,
+    HEXAGRAM_PCAPNG_BLOCK_PACKET    = 0x6
+} hexagram_pcapng_block_type;
+
+typedef struct _hexagram_pcapng_block_header {
     uint32_t type,
              length;
-} hexagram_pcapng_header;
+} hexagram_pcapng_block_header;
 
-typedef struct _hexagram_pcapng_footer {
+typedef struct _hexagram_pcapng_block_footer {
     uint32_t length;
-} hexagram_pcapng_footer;
+} hexagram_pcapng_block_footer;
+
+/*
+ * pcapng section block structure and byte order magic
+ */
+#define HEXAGRAM_PCAPNG_SECTION_BYTEORDER 0x1a2b3c4d
+
+typedef struct _hexagram_pcapng_section {
+    uint32_t magic;
+    uint16_t major, minor;
+    uint64_t length;
+} hexagram_pcapng_section;
+
+/*
+ * pcapng interface block structure
+ */
+typedef struct _hexagram_pcapng_interface {
+    uint16_t linktype,
+             reserved;
+    uint32_t snaplen;
+} hexagram_pcapng_interface;
+
+/*
+ * pcapng packet block structure
+ */
+typedef struct _hexagram_pcapng_packet {
+    
+} hexagram_pcapng_packet;
 
 typedef int (hexagram_pcapng_block_handler)(int fd,
                                             uint32_t type,

src/pcapng.c

@@ -11,8 +11,8 @@ ssize_t hexagram_pcapng_stream_read(fd, handler, error)
     hexagram_pcapng_block_handler *handler;
     int *error;
 {
-    hexagram_pcapng_header header;
+    hexagram_pcapng_block_header header;
-    hexagram_pcapng_footer footer;
+    hexagram_pcapng_block_footer footer;
     ssize_t total = 0;
 
     while (1) {