/****************************************************************************** * * Copyright (C) 1999-2012 Broadcom Corporation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * ******************************************************************************/ /****************************************************************************** * * This file contains functions to send TS 07.10 frames * ******************************************************************************/ #include <stddef.h> #include <string.h> #include "common/bt_target.h" #include "stack/rfcdefs.h" #include "stack/port_api.h" #include "stack/l2c_api.h" #include "port_int.h" #include "rfc_int.h" #include "osi/mutex.h" #include "osi/allocator.h" #if (defined RFCOMM_INCLUDED && RFCOMM_INCLUDED == TRUE) /******************************************************************************* ** ** Function rfc_send_sabme ** ** Description This function sends SABME frame. ** *******************************************************************************/ void rfc_send_sabme (tRFC_MCB *p_mcb, UINT8 dlci) { BT_HDR *p_buf; UINT8 *p_data; UINT8 cr = RFCOMM_CR(p_mcb->is_initiator, TRUE); if ((p_buf = (BT_HDR *)osi_malloc(RFCOMM_CMD_BUF_SIZE)) == NULL) { return; } p_buf->offset = L2CAP_MIN_OFFSET; p_data = (UINT8 *)(p_buf + 1) + L2CAP_MIN_OFFSET; /* SABME frame, command, PF = 1, dlci */ *p_data++ = RFCOMM_EA | cr | (dlci << RFCOMM_SHIFT_DLCI); *p_data++ = RFCOMM_SABME | RFCOMM_PF; *p_data++ = RFCOMM_EA | 0; *p_data = RFCOMM_SABME_FCS ((UINT8 *)(p_buf + 1) + L2CAP_MIN_OFFSET, cr, dlci); p_buf->len = 4; rfc_check_send_cmd(p_mcb, p_buf); } /******************************************************************************* ** ** Function rfc_send_ua ** ** Description This function sends UA frame. ** *******************************************************************************/ void rfc_send_ua (tRFC_MCB *p_mcb, UINT8 dlci) { BT_HDR *p_buf; UINT8 *p_data; UINT8 cr = RFCOMM_CR(p_mcb->is_initiator, FALSE); if ((p_buf = (BT_HDR *)osi_malloc(RFCOMM_CMD_BUF_SIZE)) == NULL) { return; } p_buf->offset = L2CAP_MIN_OFFSET; p_data = (UINT8 *)(p_buf + 1) + L2CAP_MIN_OFFSET; /* ua frame, response, PF = 1, dlci */ *p_data++ = RFCOMM_EA | cr | (dlci << RFCOMM_SHIFT_DLCI); *p_data++ = RFCOMM_UA | RFCOMM_PF; *p_data++ = RFCOMM_EA | 0; *p_data = RFCOMM_UA_FCS ((UINT8 *)(p_buf + 1) + L2CAP_MIN_OFFSET, cr, dlci); p_buf->len = 4; rfc_check_send_cmd(p_mcb, p_buf); } /******************************************************************************* ** ** Function rfc_send_dm ** ** Description This function sends DM frame. ** *******************************************************************************/ void rfc_send_dm (tRFC_MCB *p_mcb, UINT8 dlci, BOOLEAN pf) { BT_HDR *p_buf; UINT8 *p_data; UINT8 cr = RFCOMM_CR(p_mcb->is_initiator, FALSE); if ((p_buf = (BT_HDR *)osi_malloc(RFCOMM_CMD_BUF_SIZE)) == NULL) { return; } p_buf->offset = L2CAP_MIN_OFFSET; p_data = (UINT8 *)(p_buf + 1) + L2CAP_MIN_OFFSET; /* DM frame, response, PF = 1, dlci */ *p_data++ = RFCOMM_EA | cr | (dlci << RFCOMM_SHIFT_DLCI); *p_data++ = RFCOMM_DM | ((pf) ? RFCOMM_PF : 0); *p_data++ = RFCOMM_EA | 0; *p_data = RFCOMM_DM_FCS ((UINT8 *)(p_buf + 1) + L2CAP_MIN_OFFSET, cr, dlci); p_buf->len = 4; rfc_check_send_cmd(p_mcb, p_buf); } /******************************************************************************* ** ** Function rfc_send_disc ** ** Description This function sends DISC frame. ** *******************************************************************************/ void rfc_send_disc (tRFC_MCB *p_mcb, UINT8 dlci) { BT_HDR *p_buf; UINT8 *p_data; UINT8 cr = RFCOMM_CR(p_mcb->is_initiator, TRUE); if ((p_buf = (BT_HDR *)osi_malloc(RFCOMM_CMD_BUF_SIZE)) == NULL) { return; } p_buf->offset = L2CAP_MIN_OFFSET; p_data = (UINT8 *)(p_buf + 1) + L2CAP_MIN_OFFSET; /* DISC frame, command, PF = 1, dlci */ *p_data++ = RFCOMM_EA | cr | (dlci << RFCOMM_SHIFT_DLCI); *p_data++ = RFCOMM_DISC | RFCOMM_PF; *p_data++ = RFCOMM_EA | 0; *p_data = RFCOMM_DISC_FCS ((UINT8 *)(p_buf + 1) + L2CAP_MIN_OFFSET, cr, dlci); p_buf->len = 4; rfc_check_send_cmd(p_mcb, p_buf); } /******************************************************************************* ** ** Function rfc_send_buf_uih ** ** Description This function sends UIH frame. ** *******************************************************************************/ void rfc_send_buf_uih (tRFC_MCB *p_mcb, UINT8 dlci, BT_HDR *p_buf) { UINT8 *p_data; UINT8 cr = RFCOMM_CR(p_mcb->is_initiator, TRUE); UINT8 credits; p_buf->offset -= RFCOMM_CTRL_FRAME_LEN; if (p_buf->len > 127) { p_buf->offset--; } if (dlci) { credits = (UINT8)p_buf->layer_specific; } else { credits = 0; } if (credits) { p_buf->offset--; } p_data = (UINT8 *)(p_buf + 1) + p_buf->offset; /* UIH frame, command, PF = 0, dlci */ *p_data++ = RFCOMM_EA | cr | (dlci << RFCOMM_SHIFT_DLCI); *p_data++ = RFCOMM_UIH | ((credits) ? RFCOMM_PF : 0); if (p_buf->len <= 127) { *p_data++ = RFCOMM_EA | (p_buf->len << 1); p_buf->len += 3; } else { *p_data++ = (p_buf->len & 0x7f) << 1; *p_data++ = p_buf->len >> RFCOMM_SHIFT_LENGTH2; p_buf->len += 4; } if (credits) { *p_data++ = credits; p_buf->len++; } p_data = (UINT8 *)(p_buf + 1) + p_buf->offset + p_buf->len++; *p_data = RFCOMM_UIH_FCS ((UINT8 *)(p_buf + 1) + p_buf->offset, dlci); if (dlci == RFCOMM_MX_DLCI) { rfc_check_send_cmd(p_mcb, p_buf); } else { L2CA_DataWrite (p_mcb->lcid, p_buf); } } /******************************************************************************* ** ** Function rfc_send_pn ** ** Description This function sends DLC Parameters Negotiation Frame. ** *******************************************************************************/ void rfc_send_pn (tRFC_MCB *p_mcb, UINT8 dlci, BOOLEAN is_command, UINT16 mtu, UINT8 cl, UINT8 k) { BT_HDR *p_buf; UINT8 *p_data; if ((p_buf = (BT_HDR *)osi_malloc(RFCOMM_CMD_BUF_SIZE)) == NULL) { return; } p_buf->offset = L2CAP_MIN_OFFSET + RFCOMM_CTRL_FRAME_LEN; p_data = (UINT8 *)(p_buf + 1) + p_buf->offset; *p_data++ = RFCOMM_EA | RFCOMM_I_CR(is_command) | RFCOMM_MX_PN; *p_data++ = RFCOMM_EA | (RFCOMM_MX_PN_LEN << 1); *p_data++ = dlci; *p_data++ = RFCOMM_PN_FRAM_TYPE_UIH | cl; /* It appeared that we need to reply with the same priority bits as we received. ** We will use the fact that we reply in the same context so rx_frame can still be used. */ if (is_command) { *p_data++ = RFCOMM_PN_PRIORITY_0; } else { *p_data++ = rfc_cb.rfc.rx_frame.u.pn.priority; } *p_data++ = RFCOMM_T1_DSEC; *p_data++ = mtu & 0xFF; *p_data++ = mtu >> 8; *p_data++ = RFCOMM_N2; *p_data = k; /* Total length is sizeof PN data + mx header 2 */ p_buf->len = RFCOMM_MX_PN_LEN + 2; rfc_send_buf_uih (p_mcb, RFCOMM_MX_DLCI, p_buf); } /******************************************************************************* ** ** Function rfc_send_fcon ** ** Description This function sends Flow Control On Command. ** *******************************************************************************/ void rfc_send_fcon (tRFC_MCB *p_mcb, BOOLEAN is_command) { BT_HDR *p_buf; UINT8 *p_data; if ((p_buf = (BT_HDR *)osi_malloc(RFCOMM_CMD_BUF_SIZE)) == NULL) { return; } p_buf->offset = L2CAP_MIN_OFFSET + RFCOMM_CTRL_FRAME_LEN; p_data = (UINT8 *)(p_buf + 1) + p_buf->offset; *p_data++ = RFCOMM_EA | RFCOMM_I_CR(is_command) | RFCOMM_MX_FCON; *p_data++ = RFCOMM_EA | (RFCOMM_MX_FCON_LEN << 1); /* Total length is sizeof FCON data + mx header 2 */ p_buf->len = RFCOMM_MX_FCON_LEN + 2; rfc_send_buf_uih (p_mcb, RFCOMM_MX_DLCI, p_buf); } /******************************************************************************* ** ** Function rfc_send_fcoff ** ** Description This function sends Flow Control Off Command. ** *******************************************************************************/ void rfc_send_fcoff (tRFC_MCB *p_mcb, BOOLEAN is_command) { BT_HDR *p_buf; UINT8 *p_data; if ((p_buf = (BT_HDR *)osi_malloc(RFCOMM_CMD_BUF_SIZE)) == NULL) { return; } p_buf->offset = L2CAP_MIN_OFFSET + RFCOMM_CTRL_FRAME_LEN; p_data = (UINT8 *)(p_buf + 1) + p_buf->offset; *p_data++ = RFCOMM_EA | RFCOMM_I_CR(is_command) | RFCOMM_MX_FCOFF; *p_data++ = RFCOMM_EA | (RFCOMM_MX_FCOFF_LEN << 1); /* Total length is sizeof FCOFF data + mx header 2 */ p_buf->len = RFCOMM_MX_FCOFF_LEN + 2; rfc_send_buf_uih (p_mcb, RFCOMM_MX_DLCI, p_buf); } /******************************************************************************* ** ** Function rfc_send_msc ** ** Description This function sends Modem Status Command Frame. ** *******************************************************************************/ void rfc_send_msc (tRFC_MCB *p_mcb, UINT8 dlci, BOOLEAN is_command, tPORT_CTRL *p_pars) { BT_HDR *p_buf; UINT8 *p_data; UINT8 signals; UINT8 break_duration; UINT8 len; signals = p_pars->modem_signal; break_duration = p_pars->break_signal; if ((p_buf = (BT_HDR *)osi_malloc(RFCOMM_CMD_BUF_SIZE)) == NULL) { return; } p_buf->offset = L2CAP_MIN_OFFSET + RFCOMM_CTRL_FRAME_LEN; p_data = (UINT8 *)(p_buf + 1) + p_buf->offset; if (break_duration) { len = RFCOMM_MX_MSC_LEN_WITH_BREAK; } else { len = RFCOMM_MX_MSC_LEN_NO_BREAK; } *p_data++ = RFCOMM_EA | RFCOMM_I_CR(is_command) | RFCOMM_MX_MSC; *p_data++ = RFCOMM_EA | (len << 1); *p_data++ = RFCOMM_EA | RFCOMM_CR_MASK | (dlci << RFCOMM_SHIFT_DLCI); *p_data++ = RFCOMM_EA | ((p_pars->fc) ? RFCOMM_MSC_FC : 0) | ((signals & MODEM_SIGNAL_DTRDSR) ? RFCOMM_MSC_RTC : 0) | ((signals & MODEM_SIGNAL_RTSCTS) ? RFCOMM_MSC_RTR : 0) | ((signals & MODEM_SIGNAL_RI) ? RFCOMM_MSC_IC : 0) | ((signals & MODEM_SIGNAL_DCD) ? RFCOMM_MSC_DV : 0); if (break_duration) { *p_data++ = RFCOMM_EA | RFCOMM_MSC_BREAK_PRESENT_MASK | (break_duration << RFCOMM_MSC_SHIFT_BREAK); } /* Total length is sizeof MSC data + mx header 2 */ p_buf->len = len + 2; rfc_send_buf_uih (p_mcb, RFCOMM_MX_DLCI, p_buf); } /******************************************************************************* ** ** Function rfc_send_rls ** ** Description This function sends Remote Line Status Command Frame. ** *******************************************************************************/ void rfc_send_rls (tRFC_MCB *p_mcb, UINT8 dlci, BOOLEAN is_command, UINT8 status) { BT_HDR *p_buf; UINT8 *p_data; if ((p_buf = (BT_HDR *)osi_malloc(RFCOMM_CMD_BUF_SIZE)) == NULL) { return; } p_buf->offset = L2CAP_MIN_OFFSET + RFCOMM_CTRL_FRAME_LEN; p_data = (UINT8 *)(p_buf + 1) + p_buf->offset; *p_data++ = RFCOMM_EA | RFCOMM_I_CR(is_command) | RFCOMM_MX_RLS; *p_data++ = RFCOMM_EA | (RFCOMM_MX_RLS_LEN << 1); *p_data++ = RFCOMM_EA | RFCOMM_CR_MASK | (dlci << RFCOMM_SHIFT_DLCI); *p_data++ = RFCOMM_RLS_ERROR | status; /* Total length is sizeof RLS data + mx header 2 */ p_buf->len = RFCOMM_MX_RLS_LEN + 2; rfc_send_buf_uih (p_mcb, RFCOMM_MX_DLCI, p_buf); } /******************************************************************************* ** ** Function rfc_send_nsc ** ** Description This function sends Non Supported Command Response. ** *******************************************************************************/ void rfc_send_nsc (tRFC_MCB *p_mcb) { BT_HDR *p_buf; UINT8 *p_data; if ((p_buf = (BT_HDR *)osi_malloc(RFCOMM_CMD_BUF_SIZE)) == NULL) { return; } p_buf->offset = L2CAP_MIN_OFFSET + RFCOMM_CTRL_FRAME_LEN; p_data = (UINT8 *)(p_buf + 1) + p_buf->offset; *p_data++ = RFCOMM_EA | RFCOMM_I_CR(FALSE) | RFCOMM_MX_NSC; *p_data++ = RFCOMM_EA | (RFCOMM_MX_NSC_LEN << 1); *p_data++ = rfc_cb.rfc.rx_frame.ea | (rfc_cb.rfc.rx_frame.cr << RFCOMM_SHIFT_CR) | rfc_cb.rfc.rx_frame.type; /* Total length is sizeof NSC data + mx header 2 */ p_buf->len = RFCOMM_MX_NSC_LEN + 2; rfc_send_buf_uih (p_mcb, RFCOMM_MX_DLCI, p_buf); } /******************************************************************************* ** ** Function rfc_send_rpn ** ** Description This function sends Remote Port Negotiation Command ** *******************************************************************************/ void rfc_send_rpn (tRFC_MCB *p_mcb, UINT8 dlci, BOOLEAN is_command, tPORT_STATE *p_pars, UINT16 mask) { BT_HDR *p_buf; UINT8 *p_data; if ((p_buf = (BT_HDR *)osi_malloc(RFCOMM_CMD_BUF_SIZE)) == NULL) { return; } p_buf->offset = L2CAP_MIN_OFFSET + RFCOMM_CTRL_FRAME_LEN; p_data = (UINT8 *)(p_buf + 1) + p_buf->offset; *p_data++ = RFCOMM_EA | RFCOMM_I_CR(is_command) | RFCOMM_MX_RPN; if (!p_pars) { *p_data++ = RFCOMM_EA | (RFCOMM_MX_RPN_REQ_LEN << 1); *p_data++ = RFCOMM_EA | RFCOMM_CR_MASK | (dlci << RFCOMM_SHIFT_DLCI); p_buf->len = RFCOMM_MX_RPN_REQ_LEN + 2; } else { *p_data++ = RFCOMM_EA | (RFCOMM_MX_RPN_LEN << 1); *p_data++ = RFCOMM_EA | RFCOMM_CR_MASK | (dlci << RFCOMM_SHIFT_DLCI); *p_data++ = p_pars->baud_rate; *p_data++ = (p_pars->byte_size << RFCOMM_RPN_BITS_SHIFT) | (p_pars->stop_bits << RFCOMM_RPN_STOP_BITS_SHIFT) | (p_pars->parity << RFCOMM_RPN_PARITY_SHIFT) | (p_pars->parity_type << RFCOMM_RPN_PARITY_TYPE_SHIFT); *p_data++ = p_pars->fc_type; *p_data++ = p_pars->xon_char; *p_data++ = p_pars->xoff_char; *p_data++ = (mask & 0xFF); *p_data++ = (mask >> 8); /* Total length is sizeof RPN data + mx header 2 */ p_buf->len = RFCOMM_MX_RPN_LEN + 2; } rfc_send_buf_uih (p_mcb, RFCOMM_MX_DLCI, p_buf); } #if BT_RFCOMM_BQB_INCLUDED /******************************************************************************* ** ** Function rfc_bqb_send_msc_cmd ** ** Description This function sends msc command for BQB test. ** *******************************************************************************/ void rfc_bqb_send_msc_cmd(BD_ADDR cert_pts_addr) { UINT8 i; UINT8 dlci; BOOLEAN get_dlci = FALSE; tPORT *p_port; tPORT_CTRL *p_pars; tRFC_MCB *p_mcb; if ((p_pars = (tPORT_CTRL *)osi_malloc(sizeof(tPORT_CTRL))) == NULL) { return; } p_pars->modem_signal = 0; p_pars->break_signal = 0; p_pars->fc = TRUE; p_mcb = port_find_mcb (cert_pts_addr); for (i = 0; i < MAX_RFC_PORTS; i++) { p_port = &rfc_cb.port.port[i]; if (p_port->in_use && !memcmp (p_port->bd_addr, cert_pts_addr, BD_ADDR_LEN)) { dlci = p_port->dlci; get_dlci = TRUE; break; } } if (get_dlci) { rfc_send_msc(p_mcb, dlci, TRUE, p_pars); } else { RFCOMM_TRACE_ERROR ("Get dlci fail"); } osi_free(p_pars); } #endif /* BT_RFCOMM_BQB_INCLUDED */ /******************************************************************************* ** ** Function rfc_send_test ** ** Description This function sends Test frame. ** *******************************************************************************/ void rfc_send_test (tRFC_MCB *p_mcb, BOOLEAN is_command, BT_HDR *p_buf) { UINT8 *p_data; UINT16 xx; UINT8 *p_src, *p_dest; BT_HDR *p_buf_new; if ((p_buf_new = (BT_HDR *)osi_malloc(RFCOMM_CMD_BUF_SIZE)) == NULL) { return; } memcpy(p_buf_new, p_buf, sizeof(BT_HDR) + p_buf->offset + p_buf->len); osi_free(p_buf); p_buf = p_buf_new; /* Shift buffer to give space for header */ if (p_buf->offset < (L2CAP_MIN_OFFSET + RFCOMM_MIN_OFFSET + 2)) { p_src = (UINT8 *) (p_buf + 1) + p_buf->offset + p_buf->len - 1; p_dest = (UINT8 *) (p_buf + 1) + L2CAP_MIN_OFFSET + RFCOMM_MIN_OFFSET + 2 + p_buf->len - 1; for (xx = 0; xx < p_buf->len; xx++) { *p_dest-- = *p_src--; } p_buf->offset = L2CAP_MIN_OFFSET + RFCOMM_MIN_OFFSET + 2; } /* Adjust offset by number of bytes we are going to fill */ p_buf->offset -= 2; p_data = (UINT8 *)(p_buf + 1) + p_buf->offset; *p_data++ = RFCOMM_EA | RFCOMM_I_CR(is_command) | RFCOMM_MX_TEST; *p_data++ = RFCOMM_EA | (p_buf->len << 1); p_buf->len += 2; rfc_send_buf_uih (p_mcb, RFCOMM_MX_DLCI, p_buf); } /******************************************************************************* ** ** Function rfc_send_credit ** ** Description This function sends a flow control credit in UIH frame. ** *******************************************************************************/ void rfc_send_credit(tRFC_MCB *p_mcb, UINT8 dlci, UINT8 credit) { BT_HDR *p_buf; UINT8 *p_data; UINT8 cr = RFCOMM_CR(p_mcb->is_initiator, TRUE); if ((p_buf = (BT_HDR *)osi_malloc(RFCOMM_CMD_BUF_SIZE)) == NULL) { return; } p_buf->offset = L2CAP_MIN_OFFSET; p_data = (UINT8 *)(p_buf + 1) + p_buf->offset; *p_data++ = RFCOMM_EA | cr | (dlci << RFCOMM_SHIFT_DLCI); *p_data++ = RFCOMM_UIH | RFCOMM_PF; *p_data++ = RFCOMM_EA | 0; *p_data++ = credit; *p_data = RFCOMM_UIH_FCS ((UINT8 *)(p_buf + 1) + p_buf->offset, dlci); p_buf->len = 5; rfc_check_send_cmd(p_mcb, p_buf); } /******************************************************************************* ** ** Function rfc_parse_data ** ** Description This function processes data packet received from L2CAP ** *******************************************************************************/ UINT8 rfc_parse_data (tRFC_MCB *p_mcb, MX_FRAME *p_frame, BT_HDR *p_buf) { UINT8 ead, eal, fcs; UINT8 *p_data = (UINT8 *)(p_buf + 1) + p_buf->offset; UINT8 *p_start = p_data; UINT16 len; if (p_buf->len < RFCOMM_CTRL_FRAME_LEN) { RFCOMM_TRACE_ERROR ("Bad Length1: %d", p_buf->len); return (RFC_EVENT_BAD_FRAME); } RFCOMM_PARSE_CTRL_FIELD (ead, p_frame->cr, p_frame->dlci, p_data); if ( !ead ) { RFCOMM_TRACE_ERROR ("Bad Address(EA must be 1)"); return (RFC_EVENT_BAD_FRAME); } RFCOMM_PARSE_TYPE_FIELD (p_frame->type, p_frame->pf, p_data); RFCOMM_PARSE_LEN_FIELD (eal, len, p_data); p_buf->len -= (3 + !ead + !eal + 1); /* Additional 1 for FCS */ p_buf->offset += (3 + !ead + !eal); /* handle credit if credit based flow control */ if ((p_mcb->flow == PORT_FC_CREDIT) && (p_frame->type == RFCOMM_UIH) && (p_frame->dlci != RFCOMM_MX_DLCI) && (p_frame->pf == 1)) { p_frame->credit = *p_data++; p_buf->len--; p_buf->offset++; } else { p_frame->credit = 0; } if (p_buf->len != len) { RFCOMM_TRACE_ERROR ("Bad Length2 %d %d", p_buf->len, len); return (RFC_EVENT_BAD_FRAME); } fcs = *(p_data + len); /* All control frames that we are sending are sent with P=1, expect */ /* reply with F=1 */ /* According to TS 07.10 spec ivalid frames are discarded without */ /* notification to the sender */ switch (p_frame->type) { case RFCOMM_SABME: if (RFCOMM_FRAME_IS_RSP(p_mcb->is_initiator, p_frame->cr) || !p_frame->pf || len || !RFCOMM_VALID_DLCI (p_frame->dlci) || !rfc_check_fcs (RFCOMM_CTRL_FRAME_LEN, p_start, fcs)) { RFCOMM_TRACE_ERROR ("Bad SABME"); return (RFC_EVENT_BAD_FRAME); } else { return (RFC_EVENT_SABME); } case RFCOMM_UA: if (RFCOMM_FRAME_IS_CMD(p_mcb->is_initiator, p_frame->cr) || !p_frame->pf || len || !RFCOMM_VALID_DLCI (p_frame->dlci) || !rfc_check_fcs (RFCOMM_CTRL_FRAME_LEN, p_start, fcs)) { RFCOMM_TRACE_ERROR ("Bad UA"); return (RFC_EVENT_BAD_FRAME); } else { return (RFC_EVENT_UA); } case RFCOMM_DM: if (RFCOMM_FRAME_IS_CMD(p_mcb->is_initiator, p_frame->cr) || len || !RFCOMM_VALID_DLCI(p_frame->dlci) || !rfc_check_fcs (RFCOMM_CTRL_FRAME_LEN, p_start, fcs)) { RFCOMM_TRACE_ERROR ("Bad DM"); return (RFC_EVENT_BAD_FRAME); } else { return (RFC_EVENT_DM); } case RFCOMM_DISC: if (RFCOMM_FRAME_IS_RSP(p_mcb->is_initiator, p_frame->cr) || !p_frame->pf || len || !RFCOMM_VALID_DLCI(p_frame->dlci) || !rfc_check_fcs (RFCOMM_CTRL_FRAME_LEN, p_start, fcs)) { RFCOMM_TRACE_ERROR ("Bad DISC"); return (RFC_EVENT_BAD_FRAME); } else { return (RFC_EVENT_DISC); } case RFCOMM_UIH: if (!RFCOMM_VALID_DLCI(p_frame->dlci)) { RFCOMM_TRACE_ERROR ("Bad UIH - invalid DLCI"); return (RFC_EVENT_BAD_FRAME); } else if (!rfc_check_fcs (2, p_start, fcs)) { RFCOMM_TRACE_ERROR ("Bad UIH - FCS"); return (RFC_EVENT_BAD_FRAME); } else if (RFCOMM_FRAME_IS_RSP(p_mcb->is_initiator, p_frame->cr)) { /* we assume that this is ok to allow bad implementations to work */ RFCOMM_TRACE_ERROR ("Bad UIH - response"); return (RFC_EVENT_UIH); } else { return (RFC_EVENT_UIH); } } return (RFC_EVENT_BAD_FRAME); } /******************************************************************************* ** ** Function rfc_process_mx_message ** ** Description This function processes UIH frames received on the ** multiplexer control channel. ** *******************************************************************************/ void rfc_process_mx_message (tRFC_MCB *p_mcb, BT_HDR *p_buf) { UINT8 *p_data = (UINT8 *)(p_buf + 1) + p_buf->offset; MX_FRAME *p_rx_frame = &rfc_cb.rfc.rx_frame; UINT16 length = p_buf->len; UINT8 ea, cr, mx_len; BOOLEAN is_command; p_rx_frame->ea = *p_data & RFCOMM_EA; p_rx_frame->cr = (*p_data & RFCOMM_CR_MASK) >> RFCOMM_SHIFT_CR; p_rx_frame->type = *p_data++ & ~(RFCOMM_CR_MASK | RFCOMM_EA_MASK); if (!p_rx_frame->ea || !length) { RFCOMM_TRACE_ERROR ("Illegal MX Frame ea:%d len:%d", p_rx_frame->ea, length); osi_free (p_buf); return; } length--; is_command = p_rx_frame->cr; ea = *p_data & RFCOMM_EA; mx_len = *p_data++ >> RFCOMM_SHIFT_LENGTH1; length--; if (!ea) { mx_len += *p_data++ << RFCOMM_SHIFT_LENGTH2; length --; } if (mx_len != length) { RFCOMM_TRACE_ERROR ("Bad MX frame"); osi_free (p_buf); return; } switch (p_rx_frame->type) { case RFCOMM_MX_PN: if (length != RFCOMM_MX_PN_LEN) { break; } p_rx_frame->dlci = *p_data++ & RFCOMM_PN_DLCI_MASK; p_rx_frame->u.pn.frame_type = *p_data & RFCOMM_PN_FRAME_TYPE_MASK; p_rx_frame->u.pn.conv_layer = *p_data++ & RFCOMM_PN_CONV_LAYER_MASK; p_rx_frame->u.pn.priority = *p_data++ & RFCOMM_PN_PRIORITY_MASK; p_rx_frame->u.pn.t1 = *p_data++; p_rx_frame->u.pn.mtu = *p_data + (*(p_data + 1) << 8); p_data += 2; p_rx_frame->u.pn.n2 = *p_data++; p_rx_frame->u.pn.k = *p_data++ & RFCOMM_PN_K_MASK; if (!p_rx_frame->dlci || !RFCOMM_VALID_DLCI (p_rx_frame->dlci) || (p_rx_frame->u.pn.mtu < RFCOMM_MIN_MTU) || (p_rx_frame->u.pn.mtu > RFCOMM_MAX_MTU)) { RFCOMM_TRACE_ERROR ("Bad PN frame"); break; } osi_free (p_buf); rfc_process_pn (p_mcb, is_command, p_rx_frame); return; case RFCOMM_MX_TEST: if (!length) { break; } p_rx_frame->u.test.p_data = p_data; p_rx_frame->u.test.data_len = length; p_buf->offset += 2; p_buf->len -= 2; if (is_command) { rfc_send_test (p_mcb, FALSE, p_buf); } else { rfc_process_test_rsp (p_mcb, p_buf); } return; case RFCOMM_MX_FCON: if (length != RFCOMM_MX_FCON_LEN) { break; } osi_free (p_buf); rfc_process_fcon (p_mcb, is_command); return; case RFCOMM_MX_FCOFF: if (length != RFCOMM_MX_FCOFF_LEN) { break; } osi_free (p_buf); rfc_process_fcoff (p_mcb, is_command); return; case RFCOMM_MX_MSC: ea = *p_data & RFCOMM_EA; cr = (*p_data & RFCOMM_CR_MASK) >> RFCOMM_SHIFT_CR; p_rx_frame->dlci = *p_data++ >> RFCOMM_SHIFT_DLCI; if (!ea || !cr || !p_rx_frame->dlci || !RFCOMM_VALID_DLCI (p_rx_frame->dlci)) { RFCOMM_TRACE_ERROR ("Bad MSC frame"); break; } p_rx_frame->u.msc.signals = *p_data++; if (mx_len == RFCOMM_MX_MSC_LEN_WITH_BREAK) { p_rx_frame->u.msc.break_present = *p_data & RFCOMM_MSC_BREAK_PRESENT_MASK; p_rx_frame->u.msc.break_duration = (*p_data & RFCOMM_MSC_BREAK_MASK) >> RFCOMM_MSC_SHIFT_BREAK; } else { p_rx_frame->u.msc.break_present = FALSE; p_rx_frame->u.msc.break_duration = 0; } osi_free (p_buf); rfc_process_msc (p_mcb, is_command, p_rx_frame); return; case RFCOMM_MX_NSC: if ((length != RFCOMM_MX_NSC_LEN) || !is_command) { break; } p_rx_frame->u.nsc.ea = *p_data & RFCOMM_EA; p_rx_frame->u.nsc.cr = (*p_data & RFCOMM_CR_MASK) >> RFCOMM_SHIFT_CR; p_rx_frame->u.nsc.type = *p_data++ >> RFCOMM_SHIFT_DLCI; osi_free (p_buf); rfc_process_nsc (p_mcb, p_rx_frame); return; case RFCOMM_MX_RPN: if ((length != RFCOMM_MX_RPN_REQ_LEN) && (length != RFCOMM_MX_RPN_LEN)) { break; } ea = *p_data & RFCOMM_EA; cr = (*p_data & RFCOMM_CR_MASK) >> RFCOMM_SHIFT_CR; p_rx_frame->dlci = *p_data++ >> RFCOMM_SHIFT_DLCI; if (!ea || !cr || !p_rx_frame->dlci || !RFCOMM_VALID_DLCI (p_rx_frame->dlci)) { RFCOMM_TRACE_ERROR ("Bad RPN frame"); break; } p_rx_frame->u.rpn.is_request = (length == RFCOMM_MX_RPN_REQ_LEN); if (!p_rx_frame->u.rpn.is_request) { p_rx_frame->u.rpn.baud_rate = *p_data++; p_rx_frame->u.rpn.byte_size = (*p_data >> RFCOMM_RPN_BITS_SHIFT) & RFCOMM_RPN_BITS_MASK; p_rx_frame->u.rpn.stop_bits = (*p_data >> RFCOMM_RPN_STOP_BITS_SHIFT) & RFCOMM_RPN_STOP_BITS_MASK; p_rx_frame->u.rpn.parity = (*p_data >> RFCOMM_RPN_PARITY_SHIFT) & RFCOMM_RPN_PARITY_MASK; p_rx_frame->u.rpn.parity_type = (*p_data++ >> RFCOMM_RPN_PARITY_TYPE_SHIFT) & RFCOMM_RPN_PARITY_TYPE_MASK; p_rx_frame->u.rpn.fc_type = *p_data++ & RFCOMM_FC_MASK; p_rx_frame->u.rpn.xon_char = *p_data++; p_rx_frame->u.rpn.xoff_char = *p_data++; p_rx_frame->u.rpn.param_mask = (*p_data + (*(p_data + 1) << 8)) & RFCOMM_RPN_PM_MASK; } osi_free (p_buf); rfc_process_rpn (p_mcb, is_command, p_rx_frame->u.rpn.is_request, p_rx_frame); return; case RFCOMM_MX_RLS: if (length != RFCOMM_MX_RLS_LEN) { break; } ea = *p_data & RFCOMM_EA; cr = (*p_data & RFCOMM_CR_MASK) >> RFCOMM_SHIFT_CR; p_rx_frame->dlci = *p_data++ >> RFCOMM_SHIFT_DLCI; p_rx_frame->u.rls.line_status = (*p_data & ~0x01); if (!ea || !cr || !p_rx_frame->dlci || !RFCOMM_VALID_DLCI (p_rx_frame->dlci)) { RFCOMM_TRACE_ERROR ("Bad RPN frame"); break; } osi_free (p_buf); rfc_process_rls (p_mcb, is_command, p_rx_frame); return; } osi_free (p_buf); if (is_command) { rfc_send_nsc (p_mcb); } } #endif ///(defined RFCOMM_INCLUDED && RFCOMM_INCLUDED == TRUE)