/* Unix SMB/CIFS implementation. TDR (Trivial Data Representation) helper functions Based loosely on ndr.c by Andrew Tridgell. Copyright (C) Jelmer Vernooij 2005 This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include "includes.h" #include "system/filesys.h" #include "system/network.h" #include "lib/tdr/tdr.h" #define TDR_BASE_MARSHALL_SIZE 1024 #define TDR_PUSH_NEED_BYTES(tdr, n) TDR_CHECK(tdr_push_expand(tdr, tdr->data.length+(n))) #define TDR_PULL_NEED_BYTES(tdr, n) do { \ if ((n) > tdr->data.length || tdr->offset + (n) > tdr->data.length) { \ return NT_STATUS_BUFFER_TOO_SMALL; \ } \ } while(0) #define TDR_BE(tdr) ((tdr)->flags & TDR_BIG_ENDIAN) #define TDR_CVAL(tdr, ofs) CVAL(tdr->data.data,ofs) #define TDR_SVAL(tdr, ofs) (TDR_BE(tdr)?RSVAL(tdr->data.data,ofs):SVAL(tdr->data.data,ofs)) #define TDR_IVAL(tdr, ofs) (TDR_BE(tdr)?RIVAL(tdr->data.data,ofs):IVAL(tdr->data.data,ofs)) #define TDR_SCVAL(tdr, ofs, v) SCVAL(tdr->data.data,ofs,v) #define TDR_SSVAL(tdr, ofs, v) do { if (TDR_BE(tdr)) { RSSVAL(tdr->data.data,ofs,v); } else SSVAL(tdr->data.data,ofs,v); } while (0) #define TDR_SIVAL(tdr, ofs, v) do { if (TDR_BE(tdr)) { RSIVAL(tdr->data.data,ofs,v); } else SIVAL(tdr->data.data,ofs,v); } while (0) /** expand the available space in the buffer to 'size' */ NTSTATUS tdr_push_expand(struct tdr_push *tdr, uint32_t size) { if (talloc_get_size(tdr->data.data) >= size) { return NT_STATUS_OK; } tdr->data.data = talloc_realloc(tdr, tdr->data.data, uint8_t, tdr->data.length + TDR_BASE_MARSHALL_SIZE); if (tdr->data.data == NULL) return NT_STATUS_NO_MEMORY; return NT_STATUS_OK; } NTSTATUS tdr_pull_uint8(struct tdr_pull *tdr, TALLOC_CTX *ctx, uint8_t *v) { TDR_PULL_NEED_BYTES(tdr, 1); *v = TDR_CVAL(tdr, tdr->offset); tdr->offset += 1; return NT_STATUS_OK; } NTSTATUS tdr_push_uint8(struct tdr_push *tdr, const uint8_t *v) { TDR_PUSH_NEED_BYTES(tdr, 1); TDR_SCVAL(tdr, tdr->data.length, *v); tdr->data.length += 1; return NT_STATUS_OK; } NTSTATUS tdr_print_uint8(struct tdr_print *tdr, const char *name, uint8_t *v) { tdr->print(tdr, "%-25s: 0x%02x (%u)", name, *v, *v); return NT_STATUS_OK; } NTSTATUS tdr_pull_uint16(struct tdr_pull *tdr, TALLOC_CTX *ctx, uint16_t *v) { TDR_PULL_NEED_BYTES(tdr, 2); *v = TDR_SVAL(tdr, tdr->offset); tdr->offset += 2; return NT_STATUS_OK; } NTSTATUS tdr_pull_uint1632(struct tdr_pull *tdr, TALLOC_CTX *ctx, uint16_t *v) { return tdr_pull_uint16(tdr, ctx, v); } NTSTATUS tdr_push_uint16(struct tdr_push *tdr, const uint16_t *v) { TDR_PUSH_NEED_BYTES(tdr, 2); TDR_SSVAL(tdr, tdr->data.length, *v); tdr->data.length += 2; return NT_STATUS_OK; } NTSTATUS tdr_push_uint1632(struct tdr_push *tdr, const uint16_t *v) { return tdr_push_uint16(tdr, v); } NTSTATUS tdr_print_uint16(struct tdr_print *tdr, const char *name, uint16_t *v) { tdr->print(tdr, "%-25s: 0x%02x (%u)", name, *v, *v); return NT_STATUS_OK; } NTSTATUS tdr_pull_uint32(struct tdr_pull *tdr, TALLOC_CTX *ctx, uint32_t *v) { TDR_PULL_NEED_BYTES(tdr, 4); *v = TDR_IVAL(tdr, tdr->offset); tdr->offset += 4; return NT_STATUS_OK; } NTSTATUS tdr_push_uint32(struct tdr_push *tdr, const uint32_t *v) { TDR_PUSH_NEED_BYTES(tdr, 4); TDR_SIVAL(tdr, tdr->data.length, *v); tdr->data.length += 4; return NT_STATUS_OK; } NTSTATUS tdr_print_uint32(struct tdr_print *tdr, const char *name, uint32_t *v) { tdr->print(tdr, "%-25s: 0x%02x (%u)", name, *v, *v); return NT_STATUS_OK; } NTSTATUS tdr_pull_charset(struct tdr_pull *tdr, TALLOC_CTX *ctx, const char **v, uint32_t length, uint32_t el_size, charset_t chset) { size_t ret; if (length == -1) { switch (chset) { case CH_DOS: length = ascii_len_n((const char*)tdr->data.data+tdr->offset, tdr->data.length-tdr->offset); break; case CH_UTF16: length = utf16_len_n(tdr->data.data+tdr->offset, tdr->data.length-tdr->offset); break; default: return NT_STATUS_INVALID_PARAMETER; } } if (length == 0) { *v = talloc_strdup(ctx, ""); return NT_STATUS_OK; } TDR_PULL_NEED_BYTES(tdr, el_size*length); if (!convert_string_talloc(ctx, chset, CH_UNIX, tdr->data.data+tdr->offset, el_size*length, discard_const_p(void *, v), &ret)) { return NT_STATUS_INVALID_PARAMETER; } tdr->offset += length * el_size; return NT_STATUS_OK; } NTSTATUS tdr_push_charset(struct tdr_push *tdr, const char **v, uint32_t length, uint32_t el_size, charset_t chset) { size_t required, size = 0; bool ret; if (length == -1) { length = strlen(*v) + 1; /* Extra element for null character */ } required = el_size * length; TDR_PUSH_NEED_BYTES(tdr, required); ret = convert_string(CH_UNIX, chset, *v, strlen(*v), tdr->data.data+tdr->data.length, required, &size); if (ret == false) { return NT_STATUS_INVALID_PARAMETER; } /* Make sure the remaining part of the string is filled with zeroes */ if (size < required) { memset(tdr->data.data+tdr->data.length+size, 0, required-size); } tdr->data.length += required; return NT_STATUS_OK; } NTSTATUS tdr_print_charset(struct tdr_print *tdr, const char *name, const char **v, uint32_t length, uint32_t el_size, charset_t chset) { tdr->print(tdr, "%-25s: %s", name, *v); return NT_STATUS_OK; } /** parse a hyper */ NTSTATUS tdr_pull_hyper(struct tdr_pull *tdr, TALLOC_CTX *ctx, uint64_t *v) { TDR_PULL_NEED_BYTES(tdr, 8); *v = TDR_IVAL(tdr, tdr->offset); *v |= (uint64_t)(TDR_IVAL(tdr, tdr->offset+4)) << 32; tdr->offset += 8; return NT_STATUS_OK; } /** push a hyper */ NTSTATUS tdr_push_hyper(struct tdr_push *tdr, uint64_t *v) { TDR_PUSH_NEED_BYTES(tdr, 8); TDR_SIVAL(tdr, tdr->data.length, ((*v) & 0xFFFFFFFF)); TDR_SIVAL(tdr, tdr->data.length+4, ((*v)>>32)); tdr->data.length += 8; return NT_STATUS_OK; } /** push a NTTIME */ NTSTATUS tdr_push_NTTIME(struct tdr_push *tdr, NTTIME *t) { TDR_CHECK(tdr_push_hyper(tdr, t)); return NT_STATUS_OK; } /** pull a NTTIME */ NTSTATUS tdr_pull_NTTIME(struct tdr_pull *tdr, TALLOC_CTX *ctx, NTTIME *t) { TDR_CHECK(tdr_pull_hyper(tdr, ctx, t)); return NT_STATUS_OK; } /** push a time_t */ NTSTATUS tdr_push_time_t(struct tdr_push *tdr, time_t *t) { return tdr_push_uint32(tdr, (uint32_t *)t); } /** pull a time_t */ NTSTATUS tdr_pull_time_t(struct tdr_pull *tdr, TALLOC_CTX *ctx, time_t *t) { uint32_t tt; TDR_CHECK(tdr_pull_uint32(tdr, ctx, &tt)); *t = tt; return NT_STATUS_OK; } NTSTATUS tdr_print_time_t(struct tdr_print *tdr, const char *name, time_t *t) { if (*t == (time_t)-1 || *t == 0) { tdr->print(tdr, "%-25s: (time_t)%d", name, (int)*t); } else { tdr->print(tdr, "%-25s: %s", name, timestring(tdr, *t)); } return NT_STATUS_OK; } NTSTATUS tdr_print_NTTIME(struct tdr_print *tdr, const char *name, NTTIME *t) { tdr->print(tdr, "%-25s: %s", name, nt_time_string(tdr, *t)); return NT_STATUS_OK; } NTSTATUS tdr_print_DATA_BLOB(struct tdr_print *tdr, const char *name, DATA_BLOB *r) { tdr->print(tdr, "%-25s: DATA_BLOB length=%u", name, r->length); if (r->length) { dump_data(10, r->data, r->length); } return NT_STATUS_OK; } #define TDR_ALIGN(l,n) (((l) & ((n)-1)) == 0?0:((n)-((l)&((n)-1)))) /* push a DATA_BLOB onto the wire. */ NTSTATUS tdr_push_DATA_BLOB(struct tdr_push *tdr, DATA_BLOB *blob) { if (tdr->flags & TDR_ALIGN2) { blob->length = TDR_ALIGN(tdr->data.length, 2); } else if (tdr->flags & TDR_ALIGN4) { blob->length = TDR_ALIGN(tdr->data.length, 4); } else if (tdr->flags & TDR_ALIGN8) { blob->length = TDR_ALIGN(tdr->data.length, 8); } TDR_PUSH_NEED_BYTES(tdr, blob->length); memcpy(tdr->data.data+tdr->data.length, blob->data, blob->length); return NT_STATUS_OK; } /* pull a DATA_BLOB from the wire. */ NTSTATUS tdr_pull_DATA_BLOB(struct tdr_pull *tdr, TALLOC_CTX *ctx, DATA_BLOB *blob) { uint32_t length; if (tdr->flags & TDR_ALIGN2) { length = TDR_ALIGN(tdr->offset, 2); } else if (tdr->flags & TDR_ALIGN4) { length = TDR_ALIGN(tdr->offset, 4); } else if (tdr->flags & TDR_ALIGN8) { length = TDR_ALIGN(tdr->offset, 8); } else if (tdr->flags & TDR_REMAINING) { length = tdr->data.length - tdr->offset; } else { return NT_STATUS_INVALID_PARAMETER; } if (tdr->data.length - tdr->offset < length) { length = tdr->data.length - tdr->offset; } TDR_PULL_NEED_BYTES(tdr, length); *blob = data_blob_talloc(tdr, tdr->data.data+tdr->offset, length); tdr->offset += length; return NT_STATUS_OK; } struct tdr_push *tdr_push_init(TALLOC_CTX *mem_ctx) { struct tdr_push *push = talloc_zero(mem_ctx, struct tdr_push); if (push == NULL) return NULL; return push; } struct tdr_pull *tdr_pull_init(TALLOC_CTX *mem_ctx) { struct tdr_pull *pull = talloc_zero(mem_ctx, struct tdr_pull); if (pull == NULL) return NULL; return pull; } NTSTATUS tdr_push_to_fd(int fd, tdr_push_fn_t push_fn, const void *p) { struct tdr_push *push = tdr_push_init(NULL); if (push == NULL) return NT_STATUS_NO_MEMORY; if (NT_STATUS_IS_ERR(push_fn(push, p))) { DEBUG(1, ("Error pushing data\n")); talloc_free(push); return NT_STATUS_UNSUCCESSFUL; } if (write(fd, push->data.data, push->data.length) < push->data.length) { DEBUG(1, ("Error writing all data\n")); return NT_STATUS_UNSUCCESSFUL; } talloc_free(push); return NT_STATUS_OK; } void tdr_print_debug_helper(struct tdr_print *tdr, const char *format, ...) { va_list ap; char *s = NULL; int i; va_start(ap, format); vasprintf(&s, format, ap); va_end(ap); for (i=0;i<tdr->level;i++) { DEBUG(0,(" ")); } DEBUG(0,("%s\n", s)); free(s); }