diff options
Diffstat (limited to 'src/gsm/gsm23003.c')
| -rw-r--r-- | src/gsm/gsm23003.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/src/gsm/gsm23003.c b/src/gsm/gsm23003.c index 2c3b21e6..4fdad48a 100644 --- a/src/gsm/gsm23003.c +++ b/src/gsm/gsm23003.c @@ -169,6 +169,14 @@ static void to_bcd(uint8_t *bcd, uint16_t val) bcd[0] = val % 10; } +const char *osmo_gummei_name(const struct osmo_gummei *gummei) +{ + static char buf[32]; + snprintf(buf, sizeof(buf), "%s-%04x-%02x", osmo_plmn_name(&gummei->plmn), + gummei->mme.group_id, gummei->mme.code); + return buf; +} + /* Convert MCC + MNC to BCD representation * \param[out] bcd_dst caller-allocated memory for output * \param[in] mcc Mobile Country Code @@ -297,3 +305,81 @@ int osmo_plmn_cmp(const struct osmo_plmn_id *a, const struct osmo_plmn_id *b) return 1; return osmo_mnc_cmp(a->mnc, a->mnc_3_digits, b->mnc, b->mnc_3_digits); } + +/*! Generate TS 23.003 Section 19.2 Home Network Realm/Domain (text form) + * \param out[out] caller-provided output buffer, at least 33 bytes long + * \param plmn[in] Osmocom representation of PLMN ID (MCC + MNC) + * \returns number of characters printed (excluding NUL); negative on error */ +int osmo_gen_home_network_domain(char *out, const struct osmo_plmn_id *plmn) +{ + if (plmn->mcc > 999) + return -EINVAL; + if (plmn->mnc > 999) + return -EINVAL; + return sprintf(out, "epc.mnc%03u.mcc%03u.3gppnetwork.org", plmn->mnc, plmn->mcc); +} + +/*! Parse a TS 23.003 Section 19.2 Home Network Realm/Domain (text form) into a \ref osmo_plmn_id + * \param out[out] caller-allocated output structure + * \param in[in] character string representation to be parsed + * \returns 0 on success; negative on error */ +int osmo_parse_home_network_domain(struct osmo_plmn_id *out, const char *in) +{ + int rc; + + memset(out, 0, sizeof(*out)); + rc = sscanf(in, "epc.mnc%03hu.mcc%03hu.3gppnetwork.org", &out->mnc, &out->mcc); + if (rc < 0) + return rc; + if (rc != 2) + return -EINVAL; + return 0; +} + +/*! Generate TS 23.003 Section 19.4.2.4 MME Domain (text form) + * \param out[out] caller-provided output buffer, at least 56 bytes long + * \param gummei[in] Structure representing the Globally Unique MME Identifier + * \returns number of characters printed (excluding NUL); negative on error */ +int osmo_gen_mme_domain(char *out, const struct osmo_gummei *gummei) +{ + char domain[GSM23003_HOME_NETWORK_DOMAIN_LEN+1]; + int rc; + rc = osmo_gen_home_network_domain(domain, &gummei->plmn); + if (rc < 0) + return rc; + return sprintf(out, "mmec%02x.mmegi%04x.mme.%s", gummei->mme.code, gummei->mme.group_id, domain); +} + +/*! Parse a TS 23.003 Section 19.4.2.4 MME Domain (text form) into a \ref osmo_gummei + * \param out[out] caller-allocated output GUMMEI structure + * \param in[in] character string representation to be parsed + * \returns 0 on success; negative on error */ +int osmo_parse_mme_domain(struct osmo_gummei *out, const char *in) +{ + int rc; + + memset(out, 0, sizeof(*out)); + rc = sscanf(in, "mmec%02hhx.mmegi%04hx.mme.epc.mnc%03hu.mcc%03hu.3gppnetwork.org", + &out->mme.code, &out->mme.group_id, + &out->plmn.mnc, &out->plmn.mcc); + if (rc < 0) + return rc; + if (rc != 4) + return -EINVAL; + return 0; +} + +/*! Generate TS 23.003 Section 19.4.2.4 MME Group Domain (text form) + * \param out[out] caller-provided output buffer, at least 56 bytes long + * \param mmegi[in] MME Group Identifier + * \param plmn[in] Osmocom representation of PLMN ID (MCC + MNC) + * \returns number of characters printed (excluding NUL); negative on error */ +int osmo_gen_mme_group_domain(char *out, uint16_t mmegi, const struct osmo_plmn_id *plmn) +{ + char domain[GSM23003_HOME_NETWORK_DOMAIN_LEN+1]; + int rc; + rc = osmo_gen_home_network_domain(domain, plmn); + if (rc < 0) + return rc; + return sprintf(out, "mmegi%04x.mme.%s", mmegi, domain); +} |