setup basic jail packet structs/funcs

Signed-off-by: Toni Uhlig <matzeton@googlemail.com>

1 files changed, 57 insertions, 0 deletions

diff --git a/src/jail_packet.c b/src/jail_packet.c
new file mode 100644
index 0000000..4e5bd64
--- /dev/null
+++ b/src/jail_packet.c
@@ -0,0 +1,57 @@
+#include <arpa/inet.h>
+
+#include "jail_packet.h"
+#include "utils.h"
+
+typedef struct jail_packet {
+    uint8_t type;
+    uint16_t size;
+} jail_packet;
+
+typedef ssize_t (*packet_callback)(jail_packet_ctx *ctx, unsigned char *data,
+                                   size_t siz);
+
+typedef struct jail_packet_callback {
+    uint8_t type;
+    packet_callback pc;
+} jail_packet_callback;
+
+static ssize_t pkt_header_read(unsigned char *buf, size_t siz);
+static ssize_t pkt_hello(jail_packet_ctx *ctx, unsigned char *data, size_t siz);
+
+#define PKT_CB(type, cb) \
+    { type, cb }
+static const jail_packet_callback jpc[] = {
+    PKT_CB(PKT_INVALID, NULL),
+    PKT_CB(PKT_HELLO, pkt_hello)
+};
+
+
+static ssize_t pkt_header_read(unsigned char *buf, size_t siz)
+{
+    jail_packet *pkt;
+
+    if (siz < sizeof(*pkt))
+        return -1;
+    pkt = (jail_packet *) buf;
+
+    if (pkt->type >= SIZEOF(jpc))
+        return -1;
+
+    pkt->size = ntohs(pkt->size);
+    if (siz < pkt->size)
+        return -1;
+
+    return pkt->size;
+}
+
+static ssize_t pkt_hello(jail_packet_ctx *ctx, unsigned char *data, size_t siz)
+{
+    return -1;
+}
+
+int jail_packet_loop(event_ctx *ctx, jail_packet_ctx *pkt_ctx,
+                     on_data_cb on_data)
+{
+    return 1;
+}