path: root/lib9p/types.c

/* Generated by `./lib9p/types.gen lib9p/9P2000.txt lib9p/9P2000.u.txt lib9p/9P2000.e.txt`.  DO NOT EDIT!  */

#include <assert.h>
#include <stdbool.h>
#include <stddef.h>   /* for size_t */
#include <inttypes.h> /* for PRI* macros */
#include <string.h>   /* for memset() */

#include <lib9p/9p.h>

#include "internal.h"

/* strings ********************************************************************/

static const char *version_strs[LIB9P_VER_NUM] = {
	[LIB9P_VER_unknown] = "unknown",
	[LIB9P_VER_9P2000] = "9P2000",
	[LIB9P_VER_9P2000_e] = "9P2000.e",
	[LIB9P_VER_9P2000_u] = "9P2000.u",
};

const char *lib9p_version_str(enum lib9p_version ver) {
    assert(0 <= ver && ver < LIB9P_VER_NUM);
    return version_strs[ver];
}

static const char *msg_type_strs[0x100] = {
	[0x00] = "0x00",
	[0x01] = "0x01",
	[0x02] = "0x02",
	[0x03] = "0x03",
	[0x04] = "0x04",
	[0x05] = "0x05",
	[0x06] = "0x06",
	[0x07] = "0x07",
	[0x08] = "0x08",
	[0x09] = "0x09",
	[0x0A] = "0x0A",
	[0x0B] = "0x0B",
	[0x0C] = "0x0C",
	[0x0D] = "0x0D",
	[0x0E] = "0x0E",
	[0x0F] = "0x0F",
	[0x10] = "0x10",
	[0x11] = "0x11",
	[0x12] = "0x12",
	[0x13] = "0x13",
	[0x14] = "0x14",
	[0x15] = "0x15",
	[0x16] = "0x16",
	[0x17] = "0x17",
	[0x18] = "0x18",
	[0x19] = "0x19",
	[0x1A] = "0x1A",
	[0x1B] = "0x1B",
	[0x1C] = "0x1C",
	[0x1D] = "0x1D",
	[0x1E] = "0x1E",
	[0x1F] = "0x1F",
	[0x20] = "0x20",
	[0x21] = "0x21",
	[0x22] = "0x22",
	[0x23] = "0x23",
	[0x24] = "0x24",
	[0x25] = "0x25",
	[0x26] = "0x26",
	[0x27] = "0x27",
	[0x28] = "0x28",
	[0x29] = "0x29",
	[0x2A] = "0x2A",
	[0x2B] = "0x2B",
	[0x2C] = "0x2C",
	[0x2D] = "0x2D",
	[0x2E] = "0x2E",
	[0x2F] = "0x2F",
	[0x30] = "0x30",
	[0x31] = "0x31",
	[0x32] = "0x32",
	[0x33] = "0x33",
	[0x34] = "0x34",
	[0x35] = "0x35",
	[0x36] = "0x36",
	[0x37] = "0x37",
	[0x38] = "0x38",
	[0x39] = "0x39",
	[0x3A] = "0x3A",
	[0x3B] = "0x3B",
	[0x3C] = "0x3C",
	[0x3D] = "0x3D",
	[0x3E] = "0x3E",
	[0x3F] = "0x3F",
	[0x40] = "0x40",
	[0x41] = "0x41",
	[0x42] = "0x42",
	[0x43] = "0x43",
	[0x44] = "0x44",
	[0x45] = "0x45",
	[0x46] = "0x46",
	[0x47] = "0x47",
	[0x48] = "0x48",
	[0x49] = "0x49",
	[0x4A] = "0x4A",
	[0x4B] = "0x4B",
	[0x4C] = "0x4C",
	[0x4D] = "0x4D",
	[0x4E] = "0x4E",
	[0x4F] = "0x4F",
	[0x50] = "0x50",
	[0x51] = "0x51",
	[0x52] = "0x52",
	[0x53] = "0x53",
	[0x54] = "0x54",
	[0x55] = "0x55",
	[0x56] = "0x56",
	[0x57] = "0x57",
	[0x58] = "0x58",
	[0x59] = "0x59",
	[0x5A] = "0x5A",
	[0x5B] = "0x5B",
	[0x5C] = "0x5C",
	[0x5D] = "0x5D",
	[0x5E] = "0x5E",
	[0x5F] = "0x5F",
	[0x60] = "0x60",
	[0x61] = "0x61",
	[0x62] = "0x62",
	[0x63] = "0x63",
	[0x64] = "Tversion",
	[0x65] = "Rversion",
	[0x66] = "Tauth",
	[0x67] = "Rauth",
	[0x68] = "Tattach",
	[0x69] = "Rattach",
	[0x6A] = "0x6A",
	[0x6B] = "Rerror",
	[0x6C] = "Tflush",
	[0x6D] = "Rflush",
	[0x6E] = "Twalk",
	[0x6F] = "Rwalk",
	[0x70] = "Topen",
	[0x71] = "Ropen",
	[0x72] = "Tcreate",
	[0x73] = "Rcreate",
	[0x74] = "Tread",
	[0x75] = "Rread",
	[0x76] = "Twrite",
	[0x77] = "Rwrite",
	[0x78] = "Tclunk",
	[0x79] = "Rclunk",
	[0x7A] = "Tremove",
	[0x7B] = "Rremove",
	[0x7C] = "Tstat",
	[0x7D] = "Rstat",
	[0x7E] = "Twstat",
	[0x7F] = "Rwstat",
	[0x80] = "0x80",
	[0x81] = "0x81",
	[0x82] = "0x82",
	[0x83] = "0x83",
	[0x84] = "0x84",
	[0x85] = "0x85",
	[0x86] = "0x86",
	[0x87] = "0x87",
	[0x88] = "0x88",
	[0x89] = "0x89",
	[0x8A] = "0x8A",
	[0x8B] = "0x8B",
	[0x8C] = "0x8C",
	[0x8D] = "0x8D",
	[0x8E] = "0x8E",
	[0x8F] = "0x8F",
	[0x90] = "0x90",
	[0x91] = "0x91",
	[0x92] = "0x92",
	[0x93] = "0x93",
	[0x94] = "0x94",
	[0x95] = "0x95",
	[0x96] = "Tsession",
	[0x97] = "Rsession",
	[0x98] = "Tsread",
	[0x99] = "Rsread",
	[0x9A] = "Tswrite",
	[0x9B] = "Rswrite",
	[0x9C] = "0x9C",
	[0x9D] = "0x9D",
	[0x9E] = "0x9E",
	[0x9F] = "0x9F",
	[0xA0] = "0xA0",
	[0xA1] = "0xA1",
	[0xA2] = "0xA2",
	[0xA3] = "0xA3",
	[0xA4] = "0xA4",
	[0xA5] = "0xA5",
	[0xA6] = "0xA6",
	[0xA7] = "0xA7",
	[0xA8] = "0xA8",
	[0xA9] = "0xA9",
	[0xAA] = "0xAA",
	[0xAB] = "0xAB",
	[0xAC] = "0xAC",
	[0xAD] = "0xAD",
	[0xAE] = "0xAE",
	[0xAF] = "0xAF",
	[0xB0] = "0xB0",
	[0xB1] = "0xB1",
	[0xB2] = "0xB2",
	[0xB3] = "0xB3",
	[0xB4] = "0xB4",
	[0xB5] = "0xB5",
	[0xB6] = "0xB6",
	[0xB7] = "0xB7",
	[0xB8] = "0xB8",
	[0xB9] = "0xB9",
	[0xBA] = "0xBA",
	[0xBB] = "0xBB",
	[0xBC] = "0xBC",
	[0xBD] = "0xBD",
	[0xBE] = "0xBE",
	[0xBF] = "0xBF",
	[0xC0] = "0xC0",
	[0xC1] = "0xC1",
	[0xC2] = "0xC2",
	[0xC3] = "0xC3",
	[0xC4] = "0xC4",
	[0xC5] = "0xC5",
	[0xC6] = "0xC6",
	[0xC7] = "0xC7",
	[0xC8] = "0xC8",
	[0xC9] = "0xC9",
	[0xCA] = "0xCA",
	[0xCB] = "0xCB",
	[0xCC] = "0xCC",
	[0xCD] = "0xCD",
	[0xCE] = "0xCE",
	[0xCF] = "0xCF",
	[0xD0] = "0xD0",
	[0xD1] = "0xD1",
	[0xD2] = "0xD2",
	[0xD3] = "0xD3",
	[0xD4] = "0xD4",
	[0xD5] = "0xD5",
	[0xD6] = "0xD6",
	[0xD7] = "0xD7",
	[0xD8] = "0xD8",
	[0xD9] = "0xD9",
	[0xDA] = "0xDA",
	[0xDB] = "0xDB",
	[0xDC] = "0xDC",
	[0xDD] = "0xDD",
	[0xDE] = "0xDE",
	[0xDF] = "0xDF",
	[0xE0] = "0xE0",
	[0xE1] = "0xE1",
	[0xE2] = "0xE2",
	[0xE3] = "0xE3",
	[0xE4] = "0xE4",
	[0xE5] = "0xE5",
	[0xE6] = "0xE6",
	[0xE7] = "0xE7",
	[0xE8] = "0xE8",
	[0xE9] = "0xE9",
	[0xEA] = "0xEA",
	[0xEB] = "0xEB",
	[0xEC] = "0xEC",
	[0xED] = "0xED",
	[0xEE] = "0xEE",
	[0xEF] = "0xEF",
	[0xF0] = "0xF0",
	[0xF1] = "0xF1",
	[0xF2] = "0xF2",
	[0xF3] = "0xF3",
	[0xF4] = "0xF4",
	[0xF5] = "0xF5",
	[0xF6] = "0xF6",
	[0xF7] = "0xF7",
	[0xF8] = "0xF8",
	[0xF9] = "0xF9",
	[0xFA] = "0xFA",
	[0xFB] = "0xFB",
	[0xFC] = "0xFC",
	[0xFD] = "0xFD",
	[0xFE] = "0xFE",
	[0xFF] = "0xFF",
};

const char *lib9p_msg_type_str(enum lib9p_msg_type typ) {
    assert(0 <= typ && typ <= 0xFF);
    return msg_type_strs[typ];
}

/* validate_* *****************************************************************/

static ALWAYS_INLINE bool _validate_size_net(struct _validate_ctx *ctx, uint32_t n) {
	if (__builtin_add_overflow(ctx->net_offset, n, &ctx->net_offset))
		/* If needed-net-size overflowed uint32_t, then
		 * there's no way that actual-net-size will live up to
		 * that.  */
		return lib9p_error(ctx->ctx, LINUX_EBADMSG, "message is too short for content");
	if (ctx->net_offset > ctx->net_size)
		return lib9p_error(ctx->ctx, LINUX_EBADMSG, "message is too short for content");
	return false;
}

static ALWAYS_INLINE bool _validate_size_host(struct _validate_ctx *ctx, size_t n) {
	if (__builtin_add_overflow(ctx->host_extra, n, &ctx->host_extra))
		/* If needed-host-size overflowed size_t, then there's
		 * no way that actual-net-size will live up to
		 * that.  */
		return lib9p_error(ctx->ctx, LINUX_EBADMSG, "message is too short for content");
	return false;
}

static ALWAYS_INLINE bool _validate_list(struct _validate_ctx *ctx,
                                         size_t cnt, _validate_fn_t item_fn, size_t item_host_size) {
	for (size_t i = 0; i < cnt; i++)
		if (_validate_size_host(ctx, item_host_size) || item_fn(ctx))
			return true;
	return false;
}

#define validate_1(ctx) _validate_size_net(ctx, 1)
#define validate_2(ctx) _validate_size_net(ctx, 2)
#define validate_4(ctx) _validate_size_net(ctx, 4)
#define validate_8(ctx) _validate_size_net(ctx, 8)

static ALWAYS_INLINE bool validate_d(struct _validate_ctx *ctx) {
	uint32_t base_offset = ctx->net_offset;
	if (validate_4(ctx))
		return true;
	uint32_t len = decode_u32le(&ctx->net_bytes[base_offset]);
	return _validate_size_net(ctx, len) || _validate_size_host(ctx, len);
}

static ALWAYS_INLINE bool validate_s(struct _validate_ctx *ctx) {
	uint32_t base_offset = ctx->net_offset;
	if (validate_2(ctx))
		return true;
	uint16_t len = decode_u16le(&ctx->net_bytes[base_offset]);
	if (_validate_size_net(ctx, len) || _validate_size_host(ctx, ((size_t)len)+1))
		return true;
	if (!is_valid_utf8_without_nul(&ctx->net_bytes[base_offset+2], len))
		return lib9p_error(ctx->ctx, LINUX_EBADMSG, "message contains invalid UTF-8");
	return false;
}

static ALWAYS_INLINE bool validate_qt(struct _validate_ctx *ctx) {
	return validate_1(ctx);
}

static ALWAYS_INLINE bool validate_qid(struct _validate_ctx *ctx) {
	return validate_qt(ctx)
	    || validate_4(ctx)
	    || validate_8(ctx);
}

static ALWAYS_INLINE bool validate_stat(struct _validate_ctx *ctx) {
	return validate_2(ctx)
	    || validate_2(ctx)
	    || validate_4(ctx)
	    || validate_qid(ctx)
	    || validate_4(ctx)
	    || validate_4(ctx)
	    || validate_4(ctx)
	    || validate_8(ctx)
	    || validate_s(ctx)
	    || validate_s(ctx)
	    || validate_s(ctx)
	    || validate_s(ctx)
	    || ( (ctx->ctx->version==LIB9P_VER_9P2000_u) && validate_s(ctx) )
	    || ( (ctx->ctx->version==LIB9P_VER_9P2000_u) && validate_4(ctx) )
	    || ( (ctx->ctx->version==LIB9P_VER_9P2000_u) && validate_4(ctx) )
	    || ( (ctx->ctx->version==LIB9P_VER_9P2000_u) && validate_4(ctx) );
}

static FLATTEN bool validate_Tversion(struct _validate_ctx *ctx) {
	return validate_4(ctx)
	    || validate_s(ctx);
}

static FLATTEN bool validate_Rversion(struct _validate_ctx *ctx) {
	return validate_4(ctx)
	    || validate_s(ctx);
}

static FLATTEN bool validate_Tauth(struct _validate_ctx *ctx) {
	return validate_4(ctx)
	    || validate_s(ctx)
	    || validate_s(ctx)
	    || ( (ctx->ctx->version==LIB9P_VER_9P2000_u) && validate_4(ctx) );
}

static FLATTEN bool validate_Rauth(struct _validate_ctx *ctx) {
	return validate_qid(ctx);
}

static FLATTEN bool validate_Tattach(struct _validate_ctx *ctx) {
	return validate_4(ctx)
	    || validate_4(ctx)
	    || validate_s(ctx)
	    || validate_s(ctx);
}

static FLATTEN bool validate_Rattach(struct _validate_ctx *ctx) {
	return validate_qid(ctx);
}

static FLATTEN bool validate_Rerror(struct _validate_ctx *ctx) {
	return validate_s(ctx)
	    || ( (ctx->ctx->version==LIB9P_VER_9P2000_u) && validate_4(ctx) );
}

static FLATTEN bool validate_Tflush(struct _validate_ctx *ctx) {
	return validate_2(ctx);
}

static FLATTEN bool validate_Rflush(struct _validate_ctx *UNUSED(ctx)) {
	return false;
}

static FLATTEN bool validate_Twalk(struct _validate_ctx *ctx) {
	return validate_4(ctx)
	    || validate_4(ctx)
	    || validate_2(ctx)
	    || _validate_list(ctx, decode_u16le(&ctx->net_bytes[ctx->net_offset-2]), validate_s, sizeof(struct lib9p_s));
}

static FLATTEN bool validate_Rwalk(struct _validate_ctx *ctx) {
	return validate_2(ctx)
	    || _validate_list(ctx, decode_u16le(&ctx->net_bytes[ctx->net_offset-2]), validate_qid, sizeof(struct lib9p_qid));
}

static FLATTEN bool validate_Topen(struct _validate_ctx *ctx) {
	return validate_4(ctx)
	    || validate_1(ctx);
}

static FLATTEN bool validate_Ropen(struct _validate_ctx *ctx) {
	return validate_qid(ctx)
	    || validate_4(ctx);
}

static FLATTEN bool validate_Tcreate(struct _validate_ctx *ctx) {
	return validate_4(ctx)
	    || validate_s(ctx)
	    || validate_4(ctx)
	    || validate_1(ctx);
}

static FLATTEN bool validate_Rcreate(struct _validate_ctx *ctx) {
	return validate_qid(ctx)
	    || validate_4(ctx);
}

static FLATTEN bool validate_Tread(struct _validate_ctx *ctx) {
	return validate_4(ctx)
	    || validate_8(ctx)
	    || validate_4(ctx);
}

static FLATTEN bool validate_Rread(struct _validate_ctx *ctx) {
	return validate_d(ctx);
}

static FLATTEN bool validate_Twrite(struct _validate_ctx *ctx) {
	return validate_4(ctx)
	    || validate_8(ctx)
	    || validate_d(ctx);
}

static FLATTEN bool validate_Rwrite(struct _validate_ctx *ctx) {
	return validate_4(ctx);
}

static FLATTEN bool validate_Tclunk(struct _validate_ctx *ctx) {
	return validate_4(ctx);
}

static FLATTEN bool validate_Rclunk(struct _validate_ctx *UNUSED(ctx)) {
	return false;
}

static FLATTEN bool validate_Tremove(struct _validate_ctx *ctx) {
	return validate_4(ctx);
}

static FLATTEN bool validate_Rremove(struct _validate_ctx *UNUSED(ctx)) {
	return false;
}

static FLATTEN bool validate_Tstat(struct _validate_ctx *ctx) {
	return validate_4(ctx);
}

static FLATTEN bool validate_Rstat(struct _validate_ctx *ctx) {
	return validate_stat(ctx);
}

static FLATTEN bool validate_Twstat(struct _validate_ctx *ctx) {
	return validate_4(ctx)
	    || validate_stat(ctx);
}

static FLATTEN bool validate_Rwstat(struct _validate_ctx *UNUSED(ctx)) {
	return false;
}

static FLATTEN bool validate_Tsession(struct _validate_ctx *ctx) {
	return validate_8(ctx);
}

static FLATTEN bool validate_Rsession(struct _validate_ctx *UNUSED(ctx)) {
	return false;
}

static FLATTEN bool validate_Tsread(struct _validate_ctx *ctx) {
	return validate_4(ctx)
	    || validate_2(ctx)
	    || _validate_list(ctx, decode_u16le(&ctx->net_bytes[ctx->net_offset-2]), validate_s, sizeof(struct lib9p_s));
}

static FLATTEN bool validate_Rsread(struct _validate_ctx *ctx) {
	return validate_d(ctx);
}

static FLATTEN bool validate_Tswrite(struct _validate_ctx *ctx) {
	return validate_4(ctx)
	    || validate_2(ctx)
	    || _validate_list(ctx, decode_u16le(&ctx->net_bytes[ctx->net_offset-2]), validate_s, sizeof(struct lib9p_s))
	    || validate_d(ctx);
}

static FLATTEN bool validate_Rswrite(struct _validate_ctx *ctx) {
	return validate_4(ctx);
}

/* unmarshal_* ****************************************************************/

static ALWAYS_INLINE void unmarshal_1(struct _unmarshal_ctx *ctx, uint8_t *out) {
	*out = decode_u8le(&ctx->net_bytes[ctx->net_offset]);
	ctx->net_offset += 1;
}

static ALWAYS_INLINE void unmarshal_2(struct _unmarshal_ctx *ctx, uint16_t *out) {
	*out = decode_u16le(&ctx->net_bytes[ctx->net_offset]);
	ctx->net_offset += 2;
}

static ALWAYS_INLINE void unmarshal_4(struct _unmarshal_ctx *ctx, uint32_t *out) {
	*out = decode_u32le(&ctx->net_bytes[ctx->net_offset]);
	ctx->net_offset += 4;
}

static ALWAYS_INLINE void unmarshal_8(struct _unmarshal_ctx *ctx, uint64_t *out) {
	*out = decode_u64le(&ctx->net_bytes[ctx->net_offset]);
	ctx->net_offset += 8;
}

static ALWAYS_INLINE void unmarshal_d(struct _unmarshal_ctx *ctx, struct lib9p_d *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_4(ctx, &out->len);
		out->dat = ctx->extra;
	ctx->extra += sizeof(out->dat[0]) * out->len;
	for (typeof(out->len) i = 0; i < out->len; i++)
		unmarshal_1(ctx, &out->dat[i]);
}

static ALWAYS_INLINE void unmarshal_s(struct _unmarshal_ctx *ctx, struct lib9p_s *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_2(ctx, &out->len);
		out->utf8 = ctx->extra;
	ctx->extra += sizeof(out->utf8[0]) * out->len;
	for (typeof(out->len) i = 0; i < out->len; i++)
		unmarshal_1(ctx, &out->utf8[i]);
}

static ALWAYS_INLINE void unmarshal_qt(struct _unmarshal_ctx *ctx, lib9p_qt_t *out) {
	unmarshal_1(ctx, (uint8_t *)out);
}

static ALWAYS_INLINE void unmarshal_qid(struct _unmarshal_ctx *ctx, struct lib9p_qid *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_qt(ctx, &out->type);
	unmarshal_4(ctx, &out->vers);
	unmarshal_8(ctx, &out->path);
}

static ALWAYS_INLINE void unmarshal_stat(struct _unmarshal_ctx *ctx, struct lib9p_stat *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_2(ctx, &out->stat_size);
	unmarshal_2(ctx, &out->kern_type);
	unmarshal_4(ctx, &out->kern_dev);
	unmarshal_qid(ctx, &out->file_qid);
	unmarshal_4(ctx, &out->file_mode);
	unmarshal_4(ctx, &out->file_atime);
	unmarshal_4(ctx, &out->file_mtime);
	unmarshal_8(ctx, &out->file_size);
	unmarshal_s(ctx, &out->file_name);
	unmarshal_s(ctx, &out->file_owner_uid);
	unmarshal_s(ctx, &out->file_owner_gid);
	unmarshal_s(ctx, &out->file_last_modified_uid);
	if ( (ctx->ctx->version==LIB9P_VER_9P2000_u) ) unmarshal_s(ctx, &out->file_extension);
	if ( (ctx->ctx->version==LIB9P_VER_9P2000_u) ) unmarshal_4(ctx, &out->file_owner_n_uid);
	if ( (ctx->ctx->version==LIB9P_VER_9P2000_u) ) unmarshal_4(ctx, &out->file_owner_n_gid);
	if ( (ctx->ctx->version==LIB9P_VER_9P2000_u) ) unmarshal_4(ctx, &out->file_last_modified_n_uid);
}

static FLATTEN void unmarshal_Tversion(struct _unmarshal_ctx *ctx, struct lib9p_msg_Tversion *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_4(ctx, &out->max_msg_size);
	unmarshal_s(ctx, &out->version);
}

static FLATTEN void unmarshal_Rversion(struct _unmarshal_ctx *ctx, struct lib9p_msg_Rversion *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_4(ctx, &out->max_msg_size);
	unmarshal_s(ctx, &out->version);
}

static FLATTEN void unmarshal_Tauth(struct _unmarshal_ctx *ctx, struct lib9p_msg_Tauth *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_4(ctx, &out->afid);
	unmarshal_s(ctx, &out->uname);
	unmarshal_s(ctx, &out->aname);
	if ( (ctx->ctx->version==LIB9P_VER_9P2000_u) ) unmarshal_4(ctx, &out->n_uname);
}

static FLATTEN void unmarshal_Rauth(struct _unmarshal_ctx *ctx, struct lib9p_msg_Rauth *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_qid(ctx, &out->aqid);
}

static FLATTEN void unmarshal_Tattach(struct _unmarshal_ctx *ctx, struct lib9p_msg_Tattach *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_4(ctx, &out->fid);
	unmarshal_4(ctx, &out->afid);
	unmarshal_s(ctx, &out->uname);
	unmarshal_s(ctx, &out->aname);
}

static FLATTEN void unmarshal_Rattach(struct _unmarshal_ctx *ctx, struct lib9p_msg_Rattach *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_qid(ctx, &out->qid);
}

static FLATTEN void unmarshal_Rerror(struct _unmarshal_ctx *ctx, struct lib9p_msg_Rerror *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_s(ctx, &out->ename);
	if ( (ctx->ctx->version==LIB9P_VER_9P2000_u) ) unmarshal_4(ctx, &out->errno);
}

static FLATTEN void unmarshal_Tflush(struct _unmarshal_ctx *ctx, struct lib9p_msg_Tflush *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_2(ctx, &out->oldtag);
}

static FLATTEN void unmarshal_Rflush(struct _unmarshal_ctx *UNUSED(ctx), struct lib9p_msg_Rflush *out) {
	memset(out, 0, sizeof(*out));
}

static FLATTEN void unmarshal_Twalk(struct _unmarshal_ctx *ctx, struct lib9p_msg_Twalk *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_4(ctx, &out->fid);
	unmarshal_4(ctx, &out->newfid);
	unmarshal_2(ctx, &out->nwname);
		out->wname = ctx->extra;
	ctx->extra += sizeof(out->wname[0]) * out->nwname;
	for (typeof(out->nwname) i = 0; i < out->nwname; i++)
		unmarshal_s(ctx, &out->wname[i]);
}

static FLATTEN void unmarshal_Rwalk(struct _unmarshal_ctx *ctx, struct lib9p_msg_Rwalk *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_2(ctx, &out->nwqid);
		out->wqid = ctx->extra;
	ctx->extra += sizeof(out->wqid[0]) * out->nwqid;
	for (typeof(out->nwqid) i = 0; i < out->nwqid; i++)
		unmarshal_qid(ctx, &out->wqid[i]);
}

static FLATTEN void unmarshal_Topen(struct _unmarshal_ctx *ctx, struct lib9p_msg_Topen *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_4(ctx, &out->fid);
	unmarshal_1(ctx, &out->mode);
}

static FLATTEN void unmarshal_Ropen(struct _unmarshal_ctx *ctx, struct lib9p_msg_Ropen *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_qid(ctx, &out->qid);
	unmarshal_4(ctx, &out->iounit);
}

static FLATTEN void unmarshal_Tcreate(struct _unmarshal_ctx *ctx, struct lib9p_msg_Tcreate *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_4(ctx, &out->fid);
	unmarshal_s(ctx, &out->name);
	unmarshal_4(ctx, &out->perm);
	unmarshal_1(ctx, &out->mode);
}

static FLATTEN void unmarshal_Rcreate(struct _unmarshal_ctx *ctx, struct lib9p_msg_Rcreate *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_qid(ctx, &out->qid);
	unmarshal_4(ctx, &out->iounit);
}

static FLATTEN void unmarshal_Tread(struct _unmarshal_ctx *ctx, struct lib9p_msg_Tread *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_4(ctx, &out->fid);
	unmarshal_8(ctx, &out->offset);
	unmarshal_4(ctx, &out->count);
}

static FLATTEN void unmarshal_Rread(struct _unmarshal_ctx *ctx, struct lib9p_msg_Rread *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_d(ctx, &out->data);
}

static FLATTEN void unmarshal_Twrite(struct _unmarshal_ctx *ctx, struct lib9p_msg_Twrite *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_4(ctx, &out->fid);
	unmarshal_8(ctx, &out->offset);
	unmarshal_d(ctx, &out->data);
}

static FLATTEN void unmarshal_Rwrite(struct _unmarshal_ctx *ctx, struct lib9p_msg_Rwrite *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_4(ctx, &out->count);
}

static FLATTEN void unmarshal_Tclunk(struct _unmarshal_ctx *ctx, struct lib9p_msg_Tclunk *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_4(ctx, &out->fid);
}

static FLATTEN void unmarshal_Rclunk(struct _unmarshal_ctx *UNUSED(ctx), struct lib9p_msg_Rclunk *out) {
	memset(out, 0, sizeof(*out));
}

static FLATTEN void unmarshal_Tremove(struct _unmarshal_ctx *ctx, struct lib9p_msg_Tremove *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_4(ctx, &out->fid);
}

static FLATTEN void unmarshal_Rremove(struct _unmarshal_ctx *UNUSED(ctx), struct lib9p_msg_Rremove *out) {
	memset(out, 0, sizeof(*out));
}

static FLATTEN void unmarshal_Tstat(struct _unmarshal_ctx *ctx, struct lib9p_msg_Tstat *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_4(ctx, &out->fid);
}

static FLATTEN void unmarshal_Rstat(struct _unmarshal_ctx *ctx, struct lib9p_msg_Rstat *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_stat(ctx, &out->stat);
}

static FLATTEN void unmarshal_Twstat(struct _unmarshal_ctx *ctx, struct lib9p_msg_Twstat *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_4(ctx, &out->fid);
	unmarshal_stat(ctx, &out->stat);
}

static FLATTEN void unmarshal_Rwstat(struct _unmarshal_ctx *UNUSED(ctx), struct lib9p_msg_Rwstat *out) {
	memset(out, 0, sizeof(*out));
}

static FLATTEN void unmarshal_Tsession(struct _unmarshal_ctx *ctx, struct lib9p_msg_Tsession *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_8(ctx, &out->key);
}

static FLATTEN void unmarshal_Rsession(struct _unmarshal_ctx *UNUSED(ctx), struct lib9p_msg_Rsession *out) {
	memset(out, 0, sizeof(*out));
}

static FLATTEN void unmarshal_Tsread(struct _unmarshal_ctx *ctx, struct lib9p_msg_Tsread *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_4(ctx, &out->fid);
	unmarshal_2(ctx, &out->nwname);
		out->wname = ctx->extra;
	ctx->extra += sizeof(out->wname[0]) * out->nwname;
	for (typeof(out->nwname) i = 0; i < out->nwname; i++)
		unmarshal_s(ctx, &out->wname[i]);
}

static FLATTEN void unmarshal_Rsread(struct _unmarshal_ctx *ctx, struct lib9p_msg_Rsread *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_d(ctx, &out->data);
}

static FLATTEN void unmarshal_Tswrite(struct _unmarshal_ctx *ctx, struct lib9p_msg_Tswrite *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_4(ctx, &out->fid);
	unmarshal_2(ctx, &out->nwname);
		out->wname = ctx->extra;
	ctx->extra += sizeof(out->wname[0]) * out->nwname;
	for (typeof(out->nwname) i = 0; i < out->nwname; i++)
		unmarshal_s(ctx, &out->wname[i]);
	unmarshal_d(ctx, &out->data);
}

static FLATTEN void unmarshal_Rswrite(struct _unmarshal_ctx *ctx, struct lib9p_msg_Rswrite *out) {
	memset(out, 0, sizeof(*out));
	unmarshal_4(ctx, &out->count);
}

/* marshal_* ******************************************************************/

static ALWAYS_INLINE bool _marshal_too_large(struct _marshal_ctx *ctx) {
	lib9p_errorf(ctx->ctx, LINUX_ERANGE, "%s too large to marshal into %s limit (limit=%"PRIu32")",
		(ctx->net_bytes[4] % 2 == 0) ? "T-message" : "R-message",
		ctx->ctx->version ? "negotiated" : ((ctx->net_bytes[4] % 2 == 0) ? "client" : "server"),
		ctx->ctx->max_msg_size);
	return true;
}

static ALWAYS_INLINE bool marshal_1(struct _marshal_ctx *ctx, uint8_t *val) {
	if (ctx->net_offset + 1 > ctx->ctx->max_msg_size)
		return _marshal_too_large(ctx);
	ctx->net_bytes[ctx->net_offset] = *val;
	ctx->net_offset += 1;
	return false;
}

static ALWAYS_INLINE bool marshal_2(struct _marshal_ctx *ctx, uint16_t *val) {
	if (ctx->net_offset + 2 > ctx->ctx->max_msg_size)
		return _marshal_too_large(ctx);
	encode_u16le(*val, &ctx->net_bytes[ctx->net_offset]);
	ctx->net_offset += 2;
	return false;
}

static ALWAYS_INLINE bool marshal_4(struct _marshal_ctx *ctx, uint32_t *val) {
	if (ctx->net_offset + 4 > ctx->ctx->max_msg_size)
		return true;
	encode_u32le(*val, &ctx->net_bytes[ctx->net_offset]);
	ctx->net_offset += 4;
	return false;
}

static ALWAYS_INLINE bool marshal_8(struct _marshal_ctx *ctx, uint64_t *val) {
	if (ctx->net_offset + 8 > ctx->ctx->max_msg_size)
		return true;
	encode_u64le(*val, &ctx->net_bytes[ctx->net_offset]);
	ctx->net_offset += 8;
	return false;
}

static ALWAYS_INLINE bool marshal_d(struct _marshal_ctx *ctx, struct lib9p_d *val) {
	return marshal_4(ctx, &val->len)
	    || ({
	       	bool err = false;
	       	for (typeof(val->len) i = 0; i < val->len && !err; i++)
	       		err = marshal_1(ctx, &val->dat[i]);
	       	err;
	       });
}

static ALWAYS_INLINE bool marshal_s(struct _marshal_ctx *ctx, struct lib9p_s *val) {
	return marshal_2(ctx, &val->len)
	    || ({
	       	bool err = false;
	       	for (typeof(val->len) i = 0; i < val->len && !err; i++)
	       		err = marshal_1(ctx, &val->utf8[i]);
	       	err;
	       });
}

static ALWAYS_INLINE bool marshal_qt(struct _marshal_ctx *ctx, lib9p_qt_t *val) {
	return marshal_1(ctx, (uint8_t *)val);
}

static ALWAYS_INLINE bool marshal_qid(struct _marshal_ctx *ctx, struct lib9p_qid *val) {
	return marshal_qt(ctx, &val->type)
	    || marshal_4(ctx, &val->vers)
	    || marshal_8(ctx, &val->path);
}

static ALWAYS_INLINE bool marshal_stat(struct _marshal_ctx *ctx, struct lib9p_stat *val) {
	return marshal_2(ctx, &val->stat_size)
	    || marshal_2(ctx, &val->kern_type)
	    || marshal_4(ctx, &val->kern_dev)
	    || marshal_qid(ctx, &val->file_qid)
	    || marshal_4(ctx, &val->file_mode)
	    || marshal_4(ctx, &val->file_atime)
	    || marshal_4(ctx, &val->file_mtime)
	    || marshal_8(ctx, &val->file_size)
	    || marshal_s(ctx, &val->file_name)
	    || marshal_s(ctx, &val->file_owner_uid)
	    || marshal_s(ctx, &val->file_owner_gid)
	    || marshal_s(ctx, &val->file_last_modified_uid)
	    || ( (ctx->ctx->version==LIB9P_VER_9P2000_u) && marshal_s(ctx, &val->file_extension) )
	    || ( (ctx->ctx->version==LIB9P_VER_9P2000_u) && marshal_4(ctx, &val->file_owner_n_uid) )
	    || ( (ctx->ctx->version==LIB9P_VER_9P2000_u) && marshal_4(ctx, &val->file_owner_n_gid) )
	    || ( (ctx->ctx->version==LIB9P_VER_9P2000_u) && marshal_4(ctx, &val->file_last_modified_n_uid) );
}

static FLATTEN bool marshal_Tversion(struct _marshal_ctx *ctx, struct lib9p_msg_Tversion *val) {
	return marshal_4(ctx, &val->max_msg_size)
	    || marshal_s(ctx, &val->version);
}

static FLATTEN bool marshal_Rversion(struct _marshal_ctx *ctx, struct lib9p_msg_Rversion *val) {
	return marshal_4(ctx, &val->max_msg_size)
	    || marshal_s(ctx, &val->version);
}

static FLATTEN bool marshal_Tauth(struct _marshal_ctx *ctx, struct lib9p_msg_Tauth *val) {
	return marshal_4(ctx, &val->afid)
	    || marshal_s(ctx, &val->uname)
	    || marshal_s(ctx, &val->aname)
	    || ( (ctx->ctx->version==LIB9P_VER_9P2000_u) && marshal_4(ctx, &val->n_uname) );
}

static FLATTEN bool marshal_Rauth(struct _marshal_ctx *ctx, struct lib9p_msg_Rauth *val) {
	return marshal_qid(ctx, &val->aqid);
}

static FLATTEN bool marshal_Tattach(struct _marshal_ctx *ctx, struct lib9p_msg_Tattach *val) {
	return marshal_4(ctx, &val->fid)
	    || marshal_4(ctx, &val->afid)
	    || marshal_s(ctx, &val->uname)
	    || marshal_s(ctx, &val->aname);
}

static FLATTEN bool marshal_Rattach(struct _marshal_ctx *ctx, struct lib9p_msg_Rattach *val) {
	return marshal_qid(ctx, &val->qid);
}

static FLATTEN bool marshal_Rerror(struct _marshal_ctx *ctx, struct lib9p_msg_Rerror *val) {
	return marshal_s(ctx, &val->ename)
	    || ( (ctx->ctx->version==LIB9P_VER_9P2000_u) && marshal_4(ctx, &val->errno) );
}

static FLATTEN bool marshal_Tflush(struct _marshal_ctx *ctx, struct lib9p_msg_Tflush *val) {
	return marshal_2(ctx, &val->oldtag);
}

static FLATTEN bool marshal_Rflush(struct _marshal_ctx *UNUSED(ctx), struct lib9p_msg_Rflush *UNUSED(val)) {
	return false;
}

static FLATTEN bool marshal_Twalk(struct _marshal_ctx *ctx, struct lib9p_msg_Twalk *val) {
	return marshal_4(ctx, &val->fid)
	    || marshal_4(ctx, &val->newfid)
	    || marshal_2(ctx, &val->nwname)
	    || ({
	       	bool err = false;
	       	for (typeof(val->nwname) i = 0; i < val->nwname && !err; i++)
	       		err = marshal_s(ctx, &val->wname[i]);
	       	err;
	       });
}

static FLATTEN bool marshal_Rwalk(struct _marshal_ctx *ctx, struct lib9p_msg_Rwalk *val) {
	return marshal_2(ctx, &val->nwqid)
	    || ({
	       	bool err = false;
	       	for (typeof(val->nwqid) i = 0; i < val->nwqid && !err; i++)
	       		err = marshal_qid(ctx, &val->wqid[i]);
	       	err;
	       });
}

static FLATTEN bool marshal_Topen(struct _marshal_ctx *ctx, struct lib9p_msg_Topen *val) {
	return marshal_4(ctx, &val->fid)
	    || marshal_1(ctx, &val->mode);
}

static FLATTEN bool marshal_Ropen(struct _marshal_ctx *ctx, struct lib9p_msg_Ropen *val) {
	return marshal_qid(ctx, &val->qid)
	    || marshal_4(ctx, &val->iounit);
}

static FLATTEN bool marshal_Tcreate(struct _marshal_ctx *ctx, struct lib9p_msg_Tcreate *val) {
	return marshal_4(ctx, &val->fid)
	    || marshal_s(ctx, &val->name)
	    || marshal_4(ctx, &val->perm)
	    || marshal_1(ctx, &val->mode);
}

static FLATTEN bool marshal_Rcreate(struct _marshal_ctx *ctx, struct lib9p_msg_Rcreate *val) {
	return marshal_qid(ctx, &val->qid)
	    || marshal_4(ctx, &val->iounit);
}

static FLATTEN bool marshal_Tread(struct _marshal_ctx *ctx, struct lib9p_msg_Tread *val) {
	return marshal_4(ctx, &val->fid)
	    || marshal_8(ctx, &val->offset)
	    || marshal_4(ctx, &val->count);
}

static FLATTEN bool marshal_Rread(struct _marshal_ctx *ctx, struct lib9p_msg_Rread *val) {
	return marshal_d(ctx, &val->data);
}

static FLATTEN bool marshal_Twrite(struct _marshal_ctx *ctx, struct lib9p_msg_Twrite *val) {
	return marshal_4(ctx, &val->fid)
	    || marshal_8(ctx, &val->offset)
	    || marshal_d(ctx, &val->data);
}

static FLATTEN bool marshal_Rwrite(struct _marshal_ctx *ctx, struct lib9p_msg_Rwrite *val) {
	return marshal_4(ctx, &val->count);
}

static FLATTEN bool marshal_Tclunk(struct _marshal_ctx *ctx, struct lib9p_msg_Tclunk *val) {
	return marshal_4(ctx, &val->fid);
}

static FLATTEN bool marshal_Rclunk(struct _marshal_ctx *UNUSED(ctx), struct lib9p_msg_Rclunk *UNUSED(val)) {
	return false;
}

static FLATTEN bool marshal_Tremove(struct _marshal_ctx *ctx, struct lib9p_msg_Tremove *val) {
	return marshal_4(ctx, &val->fid);
}

static FLATTEN bool marshal_Rremove(struct _marshal_ctx *UNUSED(ctx), struct lib9p_msg_Rremove *UNUSED(val)) {
	return false;
}

static FLATTEN bool marshal_Tstat(struct _marshal_ctx *ctx, struct lib9p_msg_Tstat *val) {
	return marshal_4(ctx, &val->fid);
}

static FLATTEN bool marshal_Rstat(struct _marshal_ctx *ctx, struct lib9p_msg_Rstat *val) {
	return marshal_stat(ctx, &val->stat);
}

static FLATTEN bool marshal_Twstat(struct _marshal_ctx *ctx, struct lib9p_msg_Twstat *val) {
	return marshal_4(ctx, &val->fid)
	    || marshal_stat(ctx, &val->stat);
}

static FLATTEN bool marshal_Rwstat(struct _marshal_ctx *UNUSED(ctx), struct lib9p_msg_Rwstat *UNUSED(val)) {
	return false;
}

static FLATTEN bool marshal_Tsession(struct _marshal_ctx *ctx, struct lib9p_msg_Tsession *val) {
	return marshal_8(ctx, &val->key);
}

static FLATTEN bool marshal_Rsession(struct _marshal_ctx *UNUSED(ctx), struct lib9p_msg_Rsession *UNUSED(val)) {
	return false;
}

static FLATTEN bool marshal_Tsread(struct _marshal_ctx *ctx, struct lib9p_msg_Tsread *val) {
	return marshal_4(ctx, &val->fid)
	    || marshal_2(ctx, &val->nwname)
	    || ({
	       	bool err = false;
	       	for (typeof(val->nwname) i = 0; i < val->nwname && !err; i++)
	       		err = marshal_s(ctx, &val->wname[i]);
	       	err;
	       });
}

static FLATTEN bool marshal_Rsread(struct _marshal_ctx *ctx, struct lib9p_msg_Rsread *val) {
	return marshal_d(ctx, &val->data);
}

static FLATTEN bool marshal_Tswrite(struct _marshal_ctx *ctx, struct lib9p_msg_Tswrite *val) {
	return marshal_4(ctx, &val->fid)
	    || marshal_2(ctx, &val->nwname)
	    || ({
	       	bool err = false;
	       	for (typeof(val->nwname) i = 0; i < val->nwname && !err; i++)
	       		err = marshal_s(ctx, &val->wname[i]);
	       	err;
	       })
	    || marshal_d(ctx, &val->data);
}

static FLATTEN bool marshal_Rswrite(struct _marshal_ctx *ctx, struct lib9p_msg_Rswrite *val) {
	return marshal_4(ctx, &val->count);
}

/* vtables ********************************************************************/

#define _MSG(typ) [LIB9P_TYP_##typ] = {                          \
		.basesize  = sizeof(struct lib9p_msg_##typ),     \
		.validate  = validate_##typ,                     \
		.unmarshal = (_unmarshal_fn_t)unmarshal_##typ,   \
		.marshal   = (_marshal_fn_t)marshal_##typ,       \
	}

struct _vtable_version _lib9p_vtables[LIB9P_VER_NUM] = {
	[LIB9P_VER_unknown] = { .msgs = {
		_MSG(Tversion),
		_MSG(Rversion),
		_MSG(Rerror),
	}},
	[LIB9P_VER_9P2000] = { .msgs = {
		_MSG(Tversion),
		_MSG(Rversion),
		_MSG(Tauth),
		_MSG(Rauth),
		_MSG(Tattach),
		_MSG(Rattach),
		_MSG(Rerror),
		_MSG(Tflush),
		_MSG(Rflush),
		_MSG(Twalk),
		_MSG(Rwalk),
		_MSG(Topen),
		_MSG(Ropen),
		_MSG(Tcreate),
		_MSG(Rcreate),
		_MSG(Tread),
		_MSG(Rread),
		_MSG(Twrite),
		_MSG(Rwrite),
		_MSG(Tclunk),
		_MSG(Rclunk),
		_MSG(Tremove),
		_MSG(Rremove),
		_MSG(Tstat),
		_MSG(Rstat),
		_MSG(Twstat),
		_MSG(Rwstat),
	}},
	[LIB9P_VER_9P2000_e] = { .msgs = {
		_MSG(Tversion),
		_MSG(Rversion),
		_MSG(Tauth),
		_MSG(Rauth),
		_MSG(Tattach),
		_MSG(Rattach),
		_MSG(Rerror),
		_MSG(Tflush),
		_MSG(Rflush),
		_MSG(Twalk),
		_MSG(Rwalk),
		_MSG(Topen),
		_MSG(Ropen),
		_MSG(Tcreate),
		_MSG(Rcreate),
		_MSG(Tread),
		_MSG(Rread),
		_MSG(Twrite),
		_MSG(Rwrite),
		_MSG(Tclunk),
		_MSG(Rclunk),
		_MSG(Tremove),
		_MSG(Rremove),
		_MSG(Tstat),
		_MSG(Rstat),
		_MSG(Twstat),
		_MSG(Rwstat),
		_MSG(Tsession),
		_MSG(Rsession),
		_MSG(Tsread),
		_MSG(Rsread),
		_MSG(Tswrite),
		_MSG(Rswrite),
	}},
	[LIB9P_VER_9P2000_u] = { .msgs = {
		_MSG(Tversion),
		_MSG(Rversion),
		_MSG(Tauth),
		_MSG(Rauth),
		_MSG(Tattach),
		_MSG(Rattach),
		_MSG(Rerror),
		_MSG(Tflush),
		_MSG(Rflush),
		_MSG(Twalk),
		_MSG(Rwalk),
		_MSG(Topen),
		_MSG(Ropen),
		_MSG(Tcreate),
		_MSG(Rcreate),
		_MSG(Tread),
		_MSG(Rread),
		_MSG(Twrite),
		_MSG(Rwrite),
		_MSG(Tclunk),
		_MSG(Rclunk),
		_MSG(Tremove),
		_MSG(Rremove),
		_MSG(Tstat),
		_MSG(Rstat),
		_MSG(Twstat),
		_MSG(Rwstat),
	}},
};