diff options
Diffstat (limited to 'openbsc/include')
| -rw-r--r-- | openbsc/include/openbsc/Makefile.am | 2 | ||||
| -rw-r--r-- | openbsc/include/openbsc/utils.h | 26 |
2 files changed, 27 insertions, 1 deletions
diff --git a/openbsc/include/openbsc/Makefile.am b/openbsc/include/openbsc/Makefile.am index 254f43dbe..828f5bd2d 100644 --- a/openbsc/include/openbsc/Makefile.am +++ b/openbsc/include/openbsc/Makefile.am @@ -14,7 +14,7 @@ noinst_HEADERS = abis_nm.h abis_rsl.h db.h gsm_04_08.h gsm_data.h \ osmo_msc_data.h osmo_bsc_grace.h sms_queue.h abis_om2000.h \ bss.h gsm_data_shared.h ipaccess.h mncc_int.h \ arfcn_range_encode.h nat_rewrite_trie.h bsc_nat_callstats.h \ - osmux.h mgcp_transcode.h gprs_utils.h \ + osmux.h mgcp_transcode.h gprs_utils.h utils.h \ gprs_gb_parse.h smpp.h meas_feed.h gprs_gsup_messages.h \ gprs_gsup_client.h bsc_msg_filter.h diff --git a/openbsc/include/openbsc/utils.h b/openbsc/include/openbsc/utils.h new file mode 100644 index 000000000..d6054873b --- /dev/null +++ b/openbsc/include/openbsc/utils.h @@ -0,0 +1,26 @@ +/* OpenBSC kitchen sink */ + +#pragma once + +#include <stdint.h> +#include <stdlib.h> + +/* Compare count bytes of exp to rel. Return 0 if they are identical, 1 + * otherwise. Do not return a mismatch on the first mismatching byte, + * but always compare all bytes, regardless. The idea is that the amount of + * matching bytes cannot be inferred from the time the comparison took.*/ +int constant_time_cmp(const uint8_t *exp, const uint8_t *rel, const int count); + +/* This is like osmo_load64be_ext, except that if data_len is less than + * sizeof(uint64_t), the data is interpreted as the least significant bytes + * (osmo_load64be_ext loads them as the most significant bytes into the + * returned uint64_t). In this way, any integer size up to 64 bits can be + * decoded conveniently by using sizeof(), without the need to call specific + * numbered functions (osmo_load16, 32, ...). */ +uint64_t decode_big_endian(const uint8_t *data, size_t data_len); + +/* This is like osmo_store64be_ext, except that this returns a static buffer of + * the result (for convenience, but not threadsafe). If data_len is less than + * sizeof(uint64_t), only the least significant bytes of value are encoded. */ +uint8_t *encode_big_endian(uint64_t value, size_t data_len); + |