Here is a list of all functions, variables, defines, enums, and typedefs with links to the files they belong to:

data : gsm_04_08.h, gsm_03_41.h, bssmap_le.c, ipaccess.h, gsm_12_21.h, gsm_04_11.h, gsm_04_08_gprs.h, gsm_08_58.h
date : ipaccess.h
dbm2rxlev() : gsm_utils.h, gsm_utils.c
dbuf : gsm0808_utils.c
dcs : gsm_23_041.h, gsm_03_41.h
DCS_7BIT_DEFAULT : gsm_04_11.h
DCS_8BIT_DATA : gsm_04_11.h
DCS_NONE : gsm_04_11.h
DCS_UCS2 : gsm_04_11.h
DEC_ERR : bsslap.c, bssmap_le.c, gad.c
DEC_ERR_NO_RETURN : bssmap_le.c
DEC_IE_MANDATORY : bssmap_le.c, bsslap.c
DEC_IE_OPTIONAL : bssmap_le.c
DEC_IE_OPTIONAL_FLAG : bssmap_le.c
decode_auth_info() : gsup.c
decode_drx_timer() : gsm48_rest_octets.c
decode_gprs_cell_opt() : gsm48_rest_octets.c
decode_gprs_pwr_ctrl_pars() : gsm48_rest_octets.c
decode_lai() : gsm0808_utils.c
decode_pdp_address() : gsup.c
decode_pdp_info() : gsup.c
decode_t3192() : gsm48_rest_octets.c
decode_wperiod() : cbsp.c
des_encrypt() : crypto.h
digits : gsm_04_08.h
DL_SAPI0 : lapdm.h
DL_SAPI3 : lapdm.h
DLCI_SAPI_RR_MM_CC : gsm_08_08.h
DLCI_SAPI_SMS : gsm_08_08.h
dtx_dtu : gsm_08_58.h