diff options
Diffstat (limited to 'src/host/layer23/include/osmocom/bb/common/sap_proto.h')
| -rw-r--r-- | src/host/layer23/include/osmocom/bb/common/sap_proto.h | 45 |
1 files changed, 36 insertions, 9 deletions
diff --git a/src/host/layer23/include/osmocom/bb/common/sap_proto.h b/src/host/layer23/include/osmocom/bb/common/sap_proto.h index 49b30fc5..e149f00d 100644 --- a/src/host/layer23/include/osmocom/bb/common/sap_proto.h +++ b/src/host/layer23/include/osmocom/bb/common/sap_proto.h @@ -3,8 +3,10 @@ #include <stdint.h> #include <osmocom/core/utils.h> +#include <osmocom/core/msgb.h> -/* Table 5.1: Message Overview */ +/* Table 5.1: Message Overview + * NOTE: messages are used as events for SAP FSM */ enum sap_msg_type { SAP_CONNECT_REQ = 0x00, SAP_CONNECT_RESP = 0x01, @@ -81,14 +83,39 @@ extern const struct value_string sap_result_names[]; extern const struct value_string sap_card_status_names[]; extern const struct value_string sap_conn_status_names[]; +/* Figure 5.2: Payload Coding */ struct sap_param { - uint8_t id; - uint16_t len; - uint8_t *value; -}; + /* Parameter ID, see sap_param_type enum */ + uint8_t param_id; + /* Reserved for further use (shall be set to 0x00) */ + uint8_t reserved[1]; + /* Parameter length */ + uint16_t length; + /* Parameter value (and optional padding) */ + uint8_t value[0]; +} __attribute__((packed)); -struct sap_msg { - uint8_t id; +/* Figure 5.1 Message Format */ +struct sap_message { + /* Message ID, see sap_msg_type enum */ + uint8_t msg_id; + /* Number of parameters */ uint8_t num_params; - struct sap_param *params; -}; + /* Reserved for further use (shall be set to 0x00) */ + uint8_t reserved[2]; + /* Payload, see sap_param struct */ + uint8_t payload[0]; +} __attribute__((packed)); + +#define GSM_SAP_LENGTH 300 +#define GSM_SAP_HEADROOM 32 + +struct msgb *sap_msgb_alloc(uint8_t msg_id); +struct msgb *sap_msg_parse(const uint8_t *buf, size_t buf_len, int max_msg_size); +int sap_check_result_code(const struct sap_message *sap_msg); + +void sap_msgb_add_param(struct msgb *msg, + enum sap_param_type param_type, + uint16_t param_len, const uint8_t *param_value); +struct sap_param *sap_get_param(const struct sap_message *sap_msg, + enum sap_param_type param_type, uint16_t *param_len); |