1 files changed, 130 insertions, 0 deletions
diff --git a/src/jail_packet.h b/src/jail_packet.h
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+++ b/src/jail_packet.h
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+/*
+ * jail_packet.h
+ * potd is licensed under the BSD license:
+ *
+ * Copyright (c) 2018 Toni Uhlig <matzeton@googlemail.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ *   this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ *
+ * - The names of its contributors may not be used to endorse or promote
+ *   products derived from this
+ *   software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef POTD_JAIL_PACKET_H
+#define POTD_JAIL_PACKET_H 1
+
+#include <stdint.h>
+
+#include "pevent.h"
+#include "jail.h"
+
+#define INIT_PKTCTX(callback, user_data) \
+    { 0, 0, 1, EMPTY_JAILCON, EMPTY_BUF, JC_CLIENT, JP_NONE, NULL, NULL }
+
+/* Remember: PKT_MAXSIZ should always be less or equal then BUFSIZ/2 - sizeof(pkt) */
+#define PKT_MAXSIZ 1500 /* pkt->size should not exceed this value */
+
+#define PKT_INVALID 0x0 /* should not happen, otherwise error */
+
+/* Client: jail_packet(PKT_HELLO)) + jail_packet_hello
+ * Server: jail_packet(RESP_*)
+ */
+#define PKT_HANDSHAKE 0x1
+
+/* Client: jail_packet(PKT_USER)) + user
+ * Server: -
+ */
+#define PKT_USER    0x2
+
+/* Client: jail_packet(PKT_PASS) + pass
+ * Server: -
+ */
+#define PKT_PASS    0x3
+
+/* Client: jail_packet(PKT_HANDSHAKE_END)
+ * Server: -
+ */
+#define PKT_HANDSHAKE_END 0x4
+
+/* Client: jail_packet(PKT_START)
+ * Server: jail_packet(RESP_*)
+ */
+#define PKT_START   0x5
+
+/* Client: jail_packet(PKT_DATA)
+ * Server: - or jail_packet(PKT_DATA)
+ */
+#define PKT_DATA    0x6
+
+/* Client: -
+ * Server: -
+ */
+#define PKT_RESPOK  0x7
+
+/* Client: -
+ * Server: -
+ */
+#define PKT_RESPERR 0x8
+
+typedef enum jail_packet_state {
+    JP_INVALID = 0, JP_NONE, JP_HANDSHAKE,
+    JP_HANDSHAKE_END, JP_START, JP_DATA
+} jail_packet_state;
+
+typedef enum jail_ctx_type {
+    JC_INVALID = 0, JC_CLIENT /* protocol handler */,
+                    JC_SERVER /* jail service */
+} jail_ctx_type;
+
+#define USER_LEN 255
+#define PASS_LEN 255
+
+typedef struct jail_packet_ctx {
+    int is_valid;            /* only used during/after jail handshake */
+    int ev_active;           /* only used in jail_packet_pkt and pkt callbacks */
+    int ev_readloop;         /* only used in jail_client_data */
+    jail_con connection;     /* jail/sandbox fd's */
+    event_buf writeback_buf; /* protocol write back buffer */
+
+    jail_ctx_type ctype;     /* Client or Server? */
+    jail_packet_state pstate; /* packet state */
+
+    char *user;              /* username used by sandbox */
+    char *pass;              /* password used by sandbox */
+} jail_packet_ctx;
+
+
+int jail_client_send(jail_packet_ctx *pkt_ctx, unsigned char *buf,
+                     size_t siz);
+
+int jail_client_data(event_ctx *ctx, event_buf *in, event_buf *out,
+                     jail_packet_ctx *pkt_ctx);
+
+int jail_server_loop(event_ctx *ctx, jail_packet_ctx *pkt_ctx);
+
+event_ctx *jail_client_handshake(int server_fd, jail_packet_ctx *pkt_ctx);
+
+int jail_server_handshake(event_ctx *ctx, jail_packet_ctx *pkt_ctx);
+
+#endif