diff options
Diffstat (limited to 'libosmocore/src/tlv_parser.c')
| -rw-r--r-- | libosmocore/src/tlv_parser.c | 171 |
1 files changed, 0 insertions, 171 deletions
diff --git a/libosmocore/src/tlv_parser.c b/libosmocore/src/tlv_parser.c deleted file mode 100644 index 407e57aa2..000000000 --- a/libosmocore/src/tlv_parser.c +++ /dev/null @@ -1,171 +0,0 @@ -#include <stdio.h> -#include <stdint.h> -#include <osmocore/utils.h> -#include <osmocore/tlv.h> - -struct tlv_definition tvlv_att_def; - -int tlv_dump(struct tlv_parsed *dec) -{ - int i; - - for (i = 0; i <= 0xff; i++) { - if (!dec->lv[i].val) - continue; - printf("T=%02x L=%d\n", i, dec->lv[i].len); - } - return 0; -} - -/* o_tag: output: tag found - * o_len: output: length of the data - * o_val: output: pointer to the data - * def: input: a structure defining the valid TLV tags / configurations - * buf: input: the input data buffer to be parsed - * buf_len: input: the length of the input data buffer - * - * Also, returns the number of bytes consumed by the TLV entry - */ -int tlv_parse_one(uint8_t *o_tag, uint16_t *o_len, const uint8_t **o_val, - const struct tlv_definition *def, - const uint8_t *buf, int buf_len) -{ - uint8_t tag; - int len; - - tag = *buf; - *o_tag = tag; - - /* FIXME: use tables for knwon IEI */ - switch (def->def[tag].type) { - case TLV_TYPE_T: - /* GSM TS 04.07 11.2.4: Type 1 TV or Type 2 T */ - *o_val = buf; - *o_len = 0; - len = 1; - break; - case TLV_TYPE_TV: - *o_val = buf+1; - *o_len = 1; - len = 2; - break; - case TLV_TYPE_FIXED: - *o_val = buf+1; - *o_len = def->def[tag].fixed_len; - len = def->def[tag].fixed_len + 1; - break; - case TLV_TYPE_TLV: - /* GSM TS 04.07 11.2.4: Type 4 TLV */ - if (buf + 1 > buf + buf_len) - return -1; - *o_val = buf+2; - *o_len = *(buf+1); - len = *o_len + 2; - if (len > buf_len) - return -2; - break; - case TLV_TYPE_TvLV: - if (*(buf+1) & 0x80) { - /* like TLV, but without highest bit of len */ - if (buf + 1 > buf + buf_len) - return -1; - *o_val = buf+2; - *o_len = *(buf+1) & 0x7f; - len = *o_len + 2; - if (len > buf_len) - return -2; - break; - } - /* like TL16V, fallthrough */ - case TLV_TYPE_TL16V: - if (2 > buf_len) - return -1; - *o_val = buf+3; - *o_len = *(buf+1) << 8 | *(buf+2); - len = *o_len + 3; - if (len > buf_len) - return -2; - break; - default: - return -3; - } - - return len; -} - -/* dec: output: a caller-allocated pointer to a struct tlv_parsed, - * def: input: a structure defining the valid TLV tags / configurations - * buf: input: the input data buffer to be parsed - * buf_len: input: the length of the input data buffer - * lv_tag: input: an initial LV tag at the start of the buffer - * lv_tag2: input: a second initial LV tag following lv_tag - */ -int tlv_parse(struct tlv_parsed *dec, const struct tlv_definition *def, - const uint8_t *buf, int buf_len, uint8_t lv_tag, - uint8_t lv_tag2) -{ - int ofs = 0, num_parsed = 0; - uint16_t len; - - memset(dec, 0, sizeof(*dec)); - - if (lv_tag) { - if (ofs > buf_len) - return -1; - dec->lv[lv_tag].val = &buf[ofs+1]; - dec->lv[lv_tag].len = buf[ofs]; - len = dec->lv[lv_tag].len + 1; - if (ofs + len > buf_len) - return -2; - num_parsed++; - ofs += len; - } - if (lv_tag2) { - if (ofs > buf_len) - return -1; - dec->lv[lv_tag2].val = &buf[ofs+1]; - dec->lv[lv_tag2].len = buf[ofs]; - len = dec->lv[lv_tag2].len + 1; - if (ofs + len > buf_len) - return -2; - num_parsed++; - ofs += len; - } - - while (ofs < buf_len) { - int rv; - uint8_t tag; - const uint8_t *val; - - rv = tlv_parse_one(&tag, &len, &val, def, - &buf[ofs], buf_len-ofs); - if (rv < 0) - return rv; - dec->lv[tag].val = val; - dec->lv[tag].len = len; - ofs += rv; - num_parsed++; - } - //tlv_dump(dec); - return num_parsed; -} - -/* take a master (src) tlvdev and fill up all empty slots in 'dst' */ -void tlv_def_patch(struct tlv_definition *dst, const struct tlv_definition *src) -{ - int i; - - for (i = 0; i < ARRAY_SIZE(dst->def); i++) { - if (src->def[i].type == TLV_TYPE_NONE) - continue; - if (dst->def[i].type == TLV_TYPE_NONE) - dst->def[i] = src->def[i]; - } -} - -static __attribute__((constructor)) void on_dso_load_tlv(void) -{ - int i; - for (i = 0; i < ARRAY_SIZE(tvlv_att_def.def); i++) - tvlv_att_def.def[i].type = TLV_TYPE_TvLV; -} |