diff options
Diffstat (limited to 'src/gsm')
| -rw-r--r-- | src/gsm/gsm0808_utils.c | 87 | ||||
| -rw-r--r-- | src/gsm/libosmogsm.map | 2 |
2 files changed, 89 insertions, 0 deletions
diff --git a/src/gsm/gsm0808_utils.c b/src/gsm/gsm0808_utils.c index 54775981..dd14d3ca 100644 --- a/src/gsm/gsm0808_utils.c +++ b/src/gsm/gsm0808_utils.c @@ -1577,6 +1577,93 @@ int gsm0808_cell_id_matches_list(const struct gsm0808_cell_id *id, const struct return -1; } +/*! Copy information from a CGI to form a Cell Identifier of the specified kind. + * \param [out] cid Compose new Cell Identifier here. + * \param [in] id_discr Which kind of Cell Identifier to compose. + * \param [in] cgi Cell Global Identifier to form the Cell Identifier from. + */ +void gsm0808_cell_id_from_cgi(struct gsm0808_cell_id *cid, enum CELL_IDENT id_discr, + const struct osmo_cell_global_id *cgi) +{ + *cid = (struct gsm0808_cell_id){ + .id_discr = id_discr, + }; + + switch (id_discr) { + case CELL_IDENT_WHOLE_GLOBAL: + cid->id.global = *cgi; + return; + + case CELL_IDENT_LAC_AND_CI: + cid->id.lac_and_ci = (struct osmo_lac_and_ci_id){ + .lac = cgi->lai.lac, + .ci = cgi->cell_identity, + }; + return; + + case CELL_IDENT_CI: + cid->id.ci = cgi->cell_identity; + return; + + case CELL_IDENT_LAI: + cid->id.lai_and_lac = cgi->lai; + return; + + case CELL_IDENT_LAC: + cid->id.lac = cgi->lai.lac; + return; + + case CELL_IDENT_NO_CELL: + case CELL_IDENT_BSS: + case CELL_IDENT_UTRAN_PLMN_LAC_RNC: + case CELL_IDENT_UTRAN_RNC: + case CELL_IDENT_UTRAN_LAC_RNC: + default: + return; + }; +} + +/*! Overwrite parts of cgi with values from a Cell Identifier. + * Place only those items given in cid into cgi, leaving other values unchanged. + * \param[out] cgi Cell Global Identity to write to. + * \param[in] cid Cell Identity to read from. + * \return a bitmask of items that were set: OSMO_CGI_PART_PLMN | OSMO_CGI_PART_LAC | OSMO_CGI_PART_CI; 0 if nothing was + * written to cgi. + */ +int gsm0808_cell_id_to_cgi(struct osmo_cell_global_id *cgi, const struct gsm0808_cell_id *cid) +{ + switch (cid->id_discr) { + case CELL_IDENT_WHOLE_GLOBAL: + *cgi = cid->id.global; + return OSMO_CGI_PART_PLMN | OSMO_CGI_PART_LAC | OSMO_CGI_PART_CI; + + case CELL_IDENT_LAC_AND_CI: + cgi->lai.lac = cid->id.lac_and_ci.lac; + cgi->cell_identity = cid->id.lac_and_ci.ci; + return OSMO_CGI_PART_LAC | OSMO_CGI_PART_CI; + + case CELL_IDENT_CI: + cgi->cell_identity = cid->id.ci; + return OSMO_CGI_PART_CI; + + case CELL_IDENT_LAI: + cgi->lai = cid->id.lai_and_lac; + return OSMO_CGI_PART_PLMN | OSMO_CGI_PART_LAC; + + case CELL_IDENT_LAC: + cgi->lai.lac = cid->id.lac; + return OSMO_CGI_PART_LAC; + + case CELL_IDENT_NO_CELL: + case CELL_IDENT_BSS: + case CELL_IDENT_UTRAN_PLMN_LAC_RNC: + case CELL_IDENT_UTRAN_RNC: + case CELL_IDENT_UTRAN_LAC_RNC: + default: + return 0; + }; +} + /*! value_string[] for enum CELL_IDENT. */ const struct value_string gsm0808_cell_id_discr_names[] = { { CELL_IDENT_WHOLE_GLOBAL, "CGI" }, diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map index 2d47d7a7..3fadc5a0 100644 --- a/src/gsm/libosmogsm.map +++ b/src/gsm/libosmogsm.map @@ -205,6 +205,8 @@ gsm0808_dec_cell_id_list; gsm0808_dec_cell_id_list2; gsm0808_cell_id_list_add; gsm0808_cell_id_to_list; +gsm0808_cell_id_to_cgi; +gsm0808_cell_id_from_cgi; gsm0808_enc_cell_id; gsm0808_dec_cell_id; gsm0808_cell_id_name; |