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#define GSM_OK 0
#define GSM_ERR -1
#define GSM_ERR_SIZE -10
#define GSM_ERR_NOT_SUPPORTED -11
#define GSM_TS_SIZE 25
#define GSM_UD_SIZE 160
#define GSM_UDH_SIZE 140
#define GSM_MSG_SIZE GSM_UD_SIZE
#define GSM_ADDR_SIZE 20
/* Message-Type-Indicator */
#define GSM_MTI 0x03
#define GSM_MTI_DELIVER 0x00
#define GSM_MTI_DELIVER_REPORT 0x00
#define GSM_MTI_SUBMIT 0x01
#define GSM_MTI_SUBMIT_REPORT 0x01
#define GSM_MTI_COMMAND 0x02
#define GSM_MTI_COMMAND_REPORT 0x02
#define GSM_MMS 0x04 /* More-Messages-to-Send */
#define GSM_RD 0x04 /* Reject-Duplicates */
#define GSM_LP 0x08 /* Loop-Prevention */
/* Validity-Period-Format */
#define GSM_VPF 0x18
#define GSM_VPF_NONE 0x00
#define GSM_VPF_ENHANCED 0x08
#define GSM_VPF_RELATIVE 0x10
#define GSM_VPF_ABSOLUTE 0x18
#define GSM_SRI 0x20 /* Status-Report-Indication */
#define GSM_SRR 0x20 /* Status-Report-Request */
#define GSM_SRQ 0x20 /* Status-Report-Qualifier */
#define GSM_UDHI 0x40 /* User-Data-Header-Indicator */
#define GSM_RP 0x80 /* Reply-Path */
/* Type-of-Number */
#define GSM_TON 0x70
#define GSM_TON_UNKNOWN 0x00
#define GSM_TON_INTERNATIONAL 0x10
#define GSM_TON_NATIONAL 0x20
#define GSM_TON_NETWORK 0x30
#define GSM_TON_SUBSCRIBER 0x40
#define GSM_TON_ALPHANUMERIC 0x50
#define GSM_TON_ABBRREVIATED 0x60
/* Numbering-Plan-Identification */
#define GSM_NPI 0x0f
#define GSM_NPI_UNKNOWN 0x00
#define GSM_NPI_TELEPHONE 0x01
#define GSM_NPI_DATA 0x03
#define GSM_NPI_TELEX 0x04
#define GSM_NPI_SCS1 0x05
#define GSM_NPI_SCS2 0x06
#define GSM_NPI_NATIONAL 0x08
#define GSM_NPI_PRIVATE 0x09
#define GSM_NPI_ERMES 0x0a
#define GSM_EXT 0x80
/* Protocol-Identifier */
#define GSM_PID_DEFAULT 0
#define GSM_PID_TYPE0 64
/* Data-Coding-Scheme */
#define GSM_DCS_CLASS 0x03
#define GSM_DCS_ENC 0x0c
#define GSM_DCS_CLASS_IND 0x10
#define GSM_DCS_COMPRESS_IND 0x20
#define GSM_DCS_DELETE_IND 0x40
#define GSM_DCS_GENERAL_IND 0x80
#define GSM_DCS_GROUP 0xf0
#define GSM_DCS_MWI_DISCARD 0xc0
#define GSM_DCS_MWI_STORE_GSM7 0xd0
#define GSM_DCS_MWI_STORE_UCS2 0xe0
#define GSM_DCS_MWI_SENSE 0x08
#define GSM_DCS_MWI_TYPE 0x03
#define GSM_DCS_ENCLASS 0xf0
#define GSM_DCS_ENCLASS_ENC 0x04
/* Parameter-Indicator */
#define GSM_PI_PID 0x01
#define GSM_PI_DCS 0x02
#define GSM_PI_UD 0x04
#define GSM_PI_EXT 0x08
/* character set */
#define GSM_ENC_7BIT 0x00
#define GSM_ENC_8BIT 0x04
#define GSM_ENC_UCS2 0x08
/* message waiting indication */
#define GSM_MWI_TYPE_VOICEMAIL 0x00
#define GSM_MWI_TYPE_FAX 0x01
#define GSM_MWI_TYPE_EMAIL 0x02
#define GSM_MWI_TYPE_OTHER 0x03
/* flags */
#define GSM_FLAG_COMPRESS 0x0001
#define GSM_FLAG_DELETE 0x0002
#define GSM_FLAG_DISCARD 0x0004
#define GSM_FLAG_TYPE0 0x0008
#define GSM_FLAG_STATUS_REPORT 0x0010
#define GSM_FLAG_REPLY_PATH 0x0020
/* message class */
#define GSM_FLAG_CLASS 0x0400
#define GSM_FLAG_CLASS0 0x0000 /* Flash */
#define GSM_FLAG_CLASS1 0x0100 /* ME-specific */
#define GSM_FLAG_CLASS2 0x0200 /* (U)SIM-specific */
#define GSM_FLAG_CLASS4 0x0300 /* TE-specific */
#define GSM_FLAG_CLASS_MASK 0x0f00
/* message waiting indication */
#define GSM_FLAG_MWI 0x4000
#define GSM_FLAG_MWI_SENSE 0x8000
#define GSM_FLAG_MWI_VOICEMAIL 0x0000
#define GSM_FLAG_MWI_FAX 0x1000
#define GSM_FLAG_MWI_EMAIL 0x2000
#define GSM_FLAG_MWI_OTHER 0x3000
#define GSM_FLAG_MWI_MASK 0xf000
uint8_t pdu_getc(char *pdu);
void pdu_putc(uint8_t ch, char *pdu);
void pdu_gets(char *pdu, uint8_t *s, int s_len);
void pdu_puts(uint8_t *s, int s_len, char *pdu);
int gsm_ucs2_to_7bit(uint16_t ucs2, char *gsm7, int gsm7_size);
int gsm_7bit_to_ucs2(char *gsm7, int gsm7_len, uint16_t *ucs2);
int gsm_7bit_enc(char *text, int text_len, char *pdu, int padb);
int gsm_7bit_dec(char *pdu, char *text, int text_len, int padb);
int gsm_addr_enc(char *addr, int addr_len, uint8_t addr_type, char *pdu, int pdu_size);
int gsm_addr_dec(char *pdu, int pdu_len, char *addr, int *addr_len, uint8_t *addr_type);
int gsm_sms_enc(char *addr, int addr_len, uint8_t addr_type, uint8_t *udh, int udh_len, uint8_t *msg, int msg_len, uint8_t enc, uint16_t flags, char *pdu, int pdu_size);
int gsm_sms_dec(char *pdu, int pdu_len, char *addr, int *addr_len, uint8_t *addr_type, uint8_t *udh, int *udh_len, uint8_t *msg, int *msg_len, char *ts, uint8_t *enc, uint16_t *flags);
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