gsm_utils.c: cleanup + do not use dynamic memory when decoding 7bit messages
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@ -2,7 +2,7 @@
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* (C) 2008 by Daniel Willmann <daniel@totalueberwachung.de>
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* (C) 2008 by Daniel Willmann <daniel@totalueberwachung.de>
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* (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
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* (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
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* (C) 2009-2010 by Harald Welte <laforge@gnumonks.org>
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* (C) 2009-2010 by Harald Welte <laforge@gnumonks.org>
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* (C) 2010 by Nico Golde <nico@ngolde.de>
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* (C) 2010-2012 by Nico Golde <nico@ngolde.de>
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*
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*
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* All Rights Reserved
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* All Rights Reserved
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*
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*
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@ -127,9 +127,8 @@ int gsm_7bit_decode_hdr(char *text, const uint8_t *user_data, uint8_t septet_l,
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{
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{
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int i = 0;
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int i = 0;
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int shift = 0;
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int shift = 0;
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uint8_t c;
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uint8_t *rtext = calloc(septet_l, sizeof(uint8_t));
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uint8_t next_is_ext = 0;
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uint8_t tmp;
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/* skip the user data header */
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/* skip the user data header */
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if (ud_hdr_ind) {
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if (ud_hdr_ind) {
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@ -141,29 +140,29 @@ int gsm_7bit_decode_hdr(char *text, const uint8_t *user_data, uint8_t septet_l,
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}
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}
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for (i = 0; i < septet_l; i++) {
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for (i = 0; i < septet_l; i++) {
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rtext[i] =
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c =
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((user_data[((i + shift) * 7 + 7) >> 3] <<
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((user_data[((i + shift) * 7 + 7) >> 3] <<
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(7 - (((i + shift) * 7 + 7) & 7))) |
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(7 - (((i + shift) * 7 + 7) & 7))) |
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(user_data[((i + shift) * 7) >> 3] >>
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(user_data[((i + shift) * 7) >> 3] >>
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(((i + shift) * 7) & 7))) & 0x7f;
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(((i + shift) * 7) & 7))) & 0x7f;
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}
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for (i = 0; i < septet_l; i++) {
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if(c == 0x1b && i + 1 < septet_l){
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/* this is an extension character */
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next_is_ext = 1;
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if(rtext[i] == 0x1b && i + 1 < septet_l){
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tmp = rtext[i+1];
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*(text++) = gsm_7bit_alphabet[0x7f + tmp];
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i++;
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continue;
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continue;
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}
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}
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*(text++) = gsm_septet_lookup(rtext[i]);
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/* this is an extension character */
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if(next_is_ext){
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next_is_ext = 0;
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*(text++) = gsm_7bit_alphabet[0x7f + c];
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} else {
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*(text++) = gsm_septet_lookup(c);
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}
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}
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}
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if (ud_hdr_ind)
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if (ud_hdr_ind)
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i += shift;
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i += shift;
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*text = '\0';
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*text = '\0';
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free(rtext);
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return i;
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return i;
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}
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}
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