l2cap.c (7d5c2f20da25e56e90bc87f1f8b57caba59706da) l2cap.c (4fc83f45ae1d133397ab7f645163081cf036bb7a)
1/*
2 * Copyright (C) 2014 BlueKitchen GmbH
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright

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2112 l2cap_run();
2113}
2114#endif
2115
2116static bool l2cap_channel_ready_to_send(l2cap_channel_t * channel){
2117 switch (channel->channel_type){
2118#ifdef ENABLE_CLASSIC
2119 case L2CAP_CHANNEL_TYPE_CLASSIC:
1/*
2 * Copyright (C) 2014 BlueKitchen GmbH
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright

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2112 l2cap_run();
2113}
2114#endif
2115
2116static bool l2cap_channel_ready_to_send(l2cap_channel_t * channel){
2117 switch (channel->channel_type){
2118#ifdef ENABLE_CLASSIC
2119 case L2CAP_CHANNEL_TYPE_CLASSIC:
2120 if (channel->state != L2CAP_STATE_OPEN) return false;
2120#ifdef ENABLE_L2CAP_ENHANCED_RETRANSMISSION_MODE
2121 // send if we have more data and remote windows isn't full yet
2122 if (channel->mode == L2CAP_CHANNEL_MODE_ENHANCED_RETRANSMISSION) {
2123 if (channel->unacked_frames >= btstack_min(channel->num_stored_tx_frames, channel->remote_tx_window_size)) return false;
2124 return hci_can_send_acl_classic_packet_now() != 0;
2125 }
2126#endif
2127 if (!channel->waiting_for_can_send_now) return false;
2128 return (hci_can_send_acl_classic_packet_now() != 0);
2129 case L2CAP_CHANNEL_TYPE_CONNECTIONLESS:
2130 if (!channel->waiting_for_can_send_now) return false;
2131 return hci_can_send_acl_classic_packet_now() != 0;
2132#endif
2133#ifdef ENABLE_BLE
2134 case L2CAP_CHANNEL_TYPE_LE_FIXED:
2135 if (!channel->waiting_for_can_send_now) return false;
2136 return hci_can_send_acl_le_packet_now() != 0;
2137#ifdef ENABLE_LE_DATA_CHANNELS
2138 case L2CAP_CHANNEL_TYPE_LE_DATA_CHANNEL:
2121#ifdef ENABLE_L2CAP_ENHANCED_RETRANSMISSION_MODE
2122 // send if we have more data and remote windows isn't full yet
2123 if (channel->mode == L2CAP_CHANNEL_MODE_ENHANCED_RETRANSMISSION) {
2124 if (channel->unacked_frames >= btstack_min(channel->num_stored_tx_frames, channel->remote_tx_window_size)) return false;
2125 return hci_can_send_acl_classic_packet_now() != 0;
2126 }
2127#endif
2128 if (!channel->waiting_for_can_send_now) return false;
2129 return (hci_can_send_acl_classic_packet_now() != 0);
2130 case L2CAP_CHANNEL_TYPE_CONNECTIONLESS:
2131 if (!channel->waiting_for_can_send_now) return false;
2132 return hci_can_send_acl_classic_packet_now() != 0;
2133#endif
2134#ifdef ENABLE_BLE
2135 case L2CAP_CHANNEL_TYPE_LE_FIXED:
2136 if (!channel->waiting_for_can_send_now) return false;
2137 return hci_can_send_acl_le_packet_now() != 0;
2138#ifdef ENABLE_LE_DATA_CHANNELS
2139 case L2CAP_CHANNEL_TYPE_LE_DATA_CHANNEL:
2140 if (channel->state != L2CAP_STATE_OPEN) return false;
2139 if (channel->send_sdu_buffer == NULL) return false;
2140 if (channel->credits_outgoing == 0u) return false;
2141 return hci_can_send_acl_le_packet_now() != 0;
2142#endif
2143#endif
2144 default:
2145 return false;
2146 }

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3330 return 0;
3331 }
3332 return 1;
3333}
3334#endif
3335
3336#ifdef ENABLE_CLASSIC
3337static void l2cap_acl_classic_handler_for_channel(l2cap_channel_t * l2cap_channel, uint8_t * packet, uint16_t size){
2141 if (channel->send_sdu_buffer == NULL) return false;
2142 if (channel->credits_outgoing == 0u) return false;
2143 return hci_can_send_acl_le_packet_now() != 0;
2144#endif
2145#endif
2146 default:
2147 return false;
2148 }

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3332 return 0;
3333 }
3334 return 1;
3335}
3336#endif
3337
3338#ifdef ENABLE_CLASSIC
3339static void l2cap_acl_classic_handler_for_channel(l2cap_channel_t * l2cap_channel, uint8_t * packet, uint16_t size){
3340
3341 // forward data only in OPEN state
3342 if (l2cap_channel->state != L2CAP_STATE_OPEN) return;
3343
3338#ifdef ENABLE_L2CAP_ENHANCED_RETRANSMISSION_MODE
3339 if (l2cap_channel->mode == L2CAP_CHANNEL_MODE_ENHANCED_RETRANSMISSION){
3340
3341 int fcs_size = l2cap_channel->fcs_option ? 2 : 0;
3342
3343 // assert control + FCS fields are inside
3344 if (size < COMPLETE_L2CAP_HEADER+2+fcs_size) return;
3345

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3345 if (l2cap_channel->mode == L2CAP_CHANNEL_MODE_ENHANCED_RETRANSMISSION){
3346
3347 int fcs_size = l2cap_channel->fcs_option ? 2 : 0;
3348
3349 // assert control + FCS fields are inside
3350 if (size < COMPLETE_L2CAP_HEADER+2+fcs_size) return;
3351

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