+++ /dev/null
-/*
-
- silcbuffmt.c
-
- Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
-
- Copyright (C) 1997 - 2000 Pekka Riikonen
-
- 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 2 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.
-
-*/
-/* XXX: These routines needs to be made more stable as these can crash
- if the data (for unformatting for example) is malformed or the buffer
- is too short. Must be fixed. There are some other obvious bugs as
- well. */
-/*
- * $Id$
- * $Log$
- * Revision 1.2 2000/07/05 06:06:35 priikone
- * Global cosmetic change.
- *
- * Revision 1.1.1.1 2000/06/27 11:36:55 priikone
- * Imported from internal CVS/Added Log headers.
- *
- *
- */
-
-#include "silcincludes.h"
-
-/* Formats the arguments sent and puts them into the buffer sent as
- argument. The buffer must be initialized beforehand and it must have
- enough free space to include the formatted data. If this function
- fails caller should not trust the buffer anymore and should free it.
- This function is used, for example, to create packets to send over
- network. */
-
-int silc_buffer_format(SilcBuffer dst, ...)
-{
- va_list ap;
- SilcBufferParamType fmt;
- unsigned char *start_ptr = dst->data;
-
- va_start(ap, dst);
-
- /* Parse the arguments by formatting type. */
- while(1) {
- fmt = va_arg(ap, SilcBufferParamType);
-
- switch(fmt) {
- case SILC_BUFFER_PARAM_SI8_CHAR:
- {
- char x = va_arg(ap, char);
- silc_buffer_put(dst, &x, 1);
- silc_buffer_pull(dst, 1);
- break;
- }
- case SILC_BUFFER_PARAM_UI8_CHAR:
- {
- unsigned char x = va_arg(ap, unsigned char);
- silc_buffer_put(dst, &x, 1);
- silc_buffer_pull(dst, 1);
- break;
- }
- case SILC_BUFFER_PARAM_SI16_SHORT:
- {
- unsigned char xf[2];
- short x = va_arg(ap, short);
- SILC_PUT16_MSB(x, xf);
- silc_buffer_put(dst, xf, 2);
- silc_buffer_pull(dst, 2);
- break;
- }
- case SILC_BUFFER_PARAM_UI16_SHORT:
- {
- unsigned char xf[2];
- unsigned short x = va_arg(ap, unsigned short);
- SILC_PUT16_MSB(x, xf);
- silc_buffer_put(dst, xf, 2);
- silc_buffer_pull(dst, 2);
- break;
- }
- case SILC_BUFFER_PARAM_SI32_INT:
- {
- unsigned char xf[4];
- int x = va_arg(ap, int);
- SILC_PUT32_MSB(x, xf);
- silc_buffer_put(dst, xf, 4);
- silc_buffer_pull(dst, 4);
- break;
- }
- case SILC_BUFFER_PARAM_UI32_INT:
- {
- unsigned char xf[4];
- unsigned int x = va_arg(ap, unsigned int);
- SILC_PUT32_MSB(x, xf);
- silc_buffer_put(dst, xf, 4);
- silc_buffer_pull(dst, 4);
- break;
- }
- case SILC_BUFFER_PARAM_UI16_STRING:
- case SILC_BUFFER_PARAM_UI32_STRING:
- case SILC_BUFFER_PARAM_UI16_STRING_ALLOC:
- case SILC_BUFFER_PARAM_UI32_STRING_ALLOC:
- {
- unsigned char *x = va_arg(ap, unsigned char *);
- silc_buffer_put(dst, x, strlen(x));
- silc_buffer_pull(dst, strlen(x));
- break;
- }
- case SILC_BUFFER_PARAM_UI16_NSTRING:
- case SILC_BUFFER_PARAM_UI32_NSTRING:
- case SILC_BUFFER_PARAM_UI_XNSTRING:
- case SILC_BUFFER_PARAM_UI16_NSTRING_ALLOC:
- case SILC_BUFFER_PARAM_UI32_NSTRING_ALLOC:
- case SILC_BUFFER_PARAM_UI_XNSTRING_ALLOC:
- {
- unsigned char *x = va_arg(ap, unsigned char *);
- unsigned int len = va_arg(ap, unsigned int);
- silc_buffer_put(dst, x, len);
- silc_buffer_pull(dst, len);
- break;
- }
- case SILC_BUFFER_PARAM_END:
- goto ok;
- break;
- default:
- SILC_LOG_ERROR(("Bad buffer formatting type `%d'. Could not "
- "format the data.", fmt));
- goto fail;
- break;
- }
- }
-
- fail:
- SILC_LOG_ERROR(("Error occured while formatting data"));
- return FALSE;
-
- ok:
- /* Push the buffer back to where it belongs. */
- silc_buffer_push(dst, dst->data - start_ptr);
- return dst->len;
-}
-
-/* Unformats the buffer sent as argument. The unformatted data is returned
- to the variable argument list of pointers. The buffer must point to the
- start of the data area to be unformatted. Buffer maybe be safely free'd
- after this returns succesfully. */
-
-int silc_buffer_unformat(SilcBuffer src, ...)
-{
- va_list ap;
- SilcBufferParamType fmt;
- unsigned char *start_ptr = src->data;
- int len = 0;
-
- va_start(ap, src);
-
- /* Parse the arguments by formatting type. */
- while(1) {
- fmt = va_arg(ap, SilcBufferParamType);
-
- switch(fmt) {
- case SILC_BUFFER_PARAM_SI8_CHAR:
- {
- char *x = va_arg(ap, char *);
- if (x)
- *x = src->data[0];
- silc_buffer_pull(src, 1);
- break;
- }
- case SILC_BUFFER_PARAM_UI8_CHAR:
- {
- unsigned char *x = va_arg(ap, unsigned char *);
- if (x)
- *x = src->data[0];
- silc_buffer_pull(src, 1);
- break;
- }
- case SILC_BUFFER_PARAM_SI16_SHORT:
- {
- short *x = va_arg(ap, short *);
- if (x)
- SILC_GET16_MSB(*x, src->data);
- silc_buffer_pull(src, 2);
- break;
- }
- case SILC_BUFFER_PARAM_UI16_SHORT:
- {
- unsigned short *x = va_arg(ap, unsigned short *);
- if (x)
- SILC_GET16_MSB(*x, src->data);
- silc_buffer_pull(src, 2);
- break;
- }
- case SILC_BUFFER_PARAM_SI32_INT:
- {
- int *x = va_arg(ap, int *);
- if (x)
- SILC_GET32_MSB(*x, src->data);
- silc_buffer_pull(src, 4);
- break;
- }
- case SILC_BUFFER_PARAM_UI32_INT:
- {
- unsigned int *x = va_arg(ap, unsigned int *);
- if (x)
- SILC_GET32_MSB(*x, src->data);
- silc_buffer_pull(src, 4);
- break;
- }
- case SILC_BUFFER_PARAM_UI16_STRING:
- {
- unsigned short len2;
- unsigned char **x = va_arg(ap, unsigned char **);
- SILC_GET16_MSB(len2, src->data);
- silc_buffer_pull(src, 2);
- if ((len2 > src->len))
- goto fail;
- if (len2 < 1)
- break;
- if (x)
- memcpy(x, src->data, len2);
- silc_buffer_pull(src, len2);
- break;
- }
- case SILC_BUFFER_PARAM_UI16_STRING_ALLOC:
- {
- unsigned short len2;
- unsigned char **x = va_arg(ap, unsigned char **);
- SILC_GET16_MSB(len2, src->data);
- silc_buffer_pull(src, 2);
- if ((len2 > src->len))
- goto fail;
- if (len2 < 1)
- break;
- if (x) {
- *x = silc_calloc(len2 + 1, sizeof(unsigned char));
- memcpy(*x, src->data, len2);
- }
- silc_buffer_pull(src, len2);
- break;
- }
- case SILC_BUFFER_PARAM_UI32_STRING:
- {
- unsigned int len2;
- unsigned char **x = va_arg(ap, unsigned char **);
- SILC_GET32_MSB(len2, src->data);
- silc_buffer_pull(src, 4);
- if ((len2 > src->len))
- goto fail;
- if (len2 < 1)
- break;
- if (x)
- memcpy(x, src->data, len2);
- silc_buffer_pull(src, len2);
- break;
- }
- case SILC_BUFFER_PARAM_UI32_STRING_ALLOC:
- {
- unsigned int len2;
- unsigned char **x = va_arg(ap, unsigned char **);
- SILC_GET32_MSB(len2, src->data);
- silc_buffer_pull(src, 4);
- if ((len2 > src->len))
- goto fail;
- if (len2 < 1)
- break;
- if (x) {
- *x = silc_calloc(len2 + 1, sizeof(unsigned char));
- memcpy(*x, src->data, len2);
- }
- silc_buffer_pull(src, len2);
- break;
- }
- case SILC_BUFFER_PARAM_UI16_NSTRING:
- {
- unsigned short len2;
- unsigned char **x = va_arg(ap, unsigned char **);
- unsigned short *len = va_arg(ap, unsigned short *);
- SILC_GET16_MSB(len2, src->data);
- silc_buffer_pull(src, 2);
- if ((len2 > src->len))
- break;
- if (len2 < 1)
- break;
- if (len)
- *len = len2;
- if (x)
- memcpy(x, src->data, len2);
- silc_buffer_pull(src, len2);
- break;
- }
- case SILC_BUFFER_PARAM_UI16_NSTRING_ALLOC:
- {
- unsigned short len2;
- unsigned char **x = va_arg(ap, unsigned char **);
- unsigned short *len = va_arg(ap, unsigned short *);
- SILC_GET16_MSB(len2, src->data);
- silc_buffer_pull(src, 2);
- if ((len2 > src->len))
- break;
- if (len2 < 1)
- break;
- if (len)
- *len = len2;
- if (x) {
- *x = silc_calloc(len2 + 1, sizeof(unsigned char));
- memcpy(*x, src->data, len2);
- }
- silc_buffer_pull(src, len2);
- break;
- }
- case SILC_BUFFER_PARAM_UI32_NSTRING:
- {
- unsigned int len2;
- unsigned char **x = va_arg(ap, unsigned char **);
- unsigned int *len = va_arg(ap, unsigned int *);
- SILC_GET32_MSB(len2, src->data);
- silc_buffer_pull(src, 4);
- if ((len2 > src->len))
- goto fail;
- if (len2 < 1)
- break;
- if (len)
- *len = len2;
- if (x)
- memcpy(x, src->data, len2);
- silc_buffer_pull(src, len2);
- break;
- }
- case SILC_BUFFER_PARAM_UI_XNSTRING_ALLOC:
- {
- unsigned char **x = va_arg(ap, unsigned char **);
- unsigned int len = va_arg(ap, unsigned int);
- if (len && x) {
- *x = silc_calloc(len + 1, sizeof(unsigned char));
- memcpy(*x, src->data, len);
- }
- silc_buffer_pull(src, len);
- break;
- }
- case SILC_BUFFER_PARAM_UI_XNSTRING:
- {
- unsigned char **x = va_arg(ap, unsigned char **);
- unsigned int len = va_arg(ap, unsigned int);
- if (len && x)
- memcpy(x, src->data, len);
- silc_buffer_pull(src, len);
- break;
- }
- case SILC_BUFFER_PARAM_END:
- goto ok;
- break;
- default:
- SILC_LOG_ERROR(("Bad buffer formatting type `%d'. Could not "
- "format the data.", fmt));
- goto fail;
- break;
- }
- }
-
- fail:
- SILC_LOG_ERROR(("Error occured while unformatting buffer"));
- return FALSE;
-
- ok:
- /* Push the buffer back to the start. */
- len = src->data - start_ptr;
- silc_buffer_push(src, len);
- return len;
-}
projects / silc.git / blobdiff