Return-Path: From: Arman Uguray To: linux-bluetooth@vger.kernel.org Cc: Arman Uguray Subject: [PATCH 09/10] shared/att: Implement outgoing "Prepare Write" request/response. Date: Thu, 26 Jun 2014 16:14:16 -0700 Message-Id: <1403824457-22461-10-git-send-email-armansito@chromium.org> In-Reply-To: <1403824457-22461-1-git-send-email-armansito@chromium.org> References: <1403824457-22461-1-git-send-email-armansito@chromium.org> Sender: linux-bluetooth-owner@vger.kernel.org List-ID: This patch adds support for "Prepare Write" requests sent via bt_att_send and the corresponding response. --- src/shared/att-types.h | 4 +-- src/shared/att.c | 67 ++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 69 insertions(+), 2 deletions(-) diff --git a/src/shared/att-types.h b/src/shared/att-types.h index 4809716..7dc22ad 100644 --- a/src/shared/att-types.h +++ b/src/shared/att-types.h @@ -162,7 +162,7 @@ struct bt_att_write_param { /* Prepare Write */ #define BT_ATT_OP_PREP_WRITE_REQ 0x16 -struct bt_att_prepare_write_req_param { +struct bt_att_prep_write_req_param { uint16_t handle; uint16_t offset; const uint8_t *part_value; @@ -170,7 +170,7 @@ struct bt_att_prepare_write_req_param { }; #define BT_ATT_OP_PREP_WRITE_RSP 0x17 -struct bt_att_prepare_write_rsp_param { +struct bt_att_prep_write_rsp_param { uint16_t handle; uint16_t offset; const uint8_t *part_value; diff --git a/src/shared/att.c b/src/shared/att.c index caf7d35..d6c2a63 100644 --- a/src/shared/att.c +++ b/src/shared/att.c @@ -412,6 +412,41 @@ static bool encode_write_pdu(struct att_send_op *op, const void *param, return true; } +static bool encode_prep_write_req(struct att_send_op *op, const void *param, + uint16_t length, uint16_t mtu) +{ + const struct bt_att_prep_write_req_param *p = param; + uint16_t len; + + if (length != sizeof(*p)) + return false; + + len = 5 + p->length; + if (len > mtu) + return false; + + op->pdu = malloc(len); + if (!op->pdu) + return false; + + ((uint8_t *) op->pdu)[0] = op->opcode; + put_le16(p->handle, ((uint8_t *) op->pdu) + 1); + put_le16(p->offset, ((uint8_t *) op->pdu) + 3); + op->len = len; + op->len = len; + + if (p->length) { + if (!p->part_value) { + free(op->pdu); + return false; + } + + memcpy(((uint8_t *) op->pdu) + 5, p->part_value, p->length); + } + + return true; +} + static bool encode_pdu(struct att_send_op *op, const void *param, uint16_t length, uint16_t mtu) { @@ -454,6 +489,8 @@ static bool encode_pdu(struct att_send_op *op, const void *param, return encode_read_by_grp_type_req(op, param, length, mtu); case BT_ATT_OP_WRITE_REQ: return encode_write_pdu(op, param, length, mtu); + case BT_ATT_OP_PREP_WRITE_REQ: + return encode_prep_write_req(op, param, length, mtu); default: break; } @@ -892,6 +929,33 @@ static bool handle_write_rsp(struct bt_att *att, uint8_t opcode, uint8_t *pdu, return request_complete(att, BT_ATT_OP_WRITE_REQ, opcode, NULL, 0); } +static bool handle_prep_write_rsp(struct bt_att *att, uint8_t opcode, + uint8_t *pdu, ssize_t pdu_len) +{ + struct bt_att_prep_write_rsp_param param; + + /* PDU must contain at least the following: + * - 1 octet: ATT opcode + * - 2 octets: Attribute handle + * - 2 octets: Offset + */ + if (pdu_len < 5) + return false; + + memset(¶m, 0, sizeof(param)); + + param.handle = get_le16(pdu + 1); + param.offset = get_le16(pdu + 3); + + if (pdu_len > 5) { + param.length = pdu_len - 5; + param.part_value = pdu + 5; + } + + return request_complete(att, BT_ATT_OP_PREP_WRITE_REQ, opcode, ¶m, + sizeof(param)); +} + static void handle_rsp(struct bt_att *att, uint8_t opcode, uint8_t *pdu, ssize_t pdu_len) { @@ -930,6 +994,9 @@ static void handle_rsp(struct bt_att *att, uint8_t opcode, uint8_t *pdu, case BT_ATT_OP_WRITE_RSP: success = handle_write_rsp(att, opcode, pdu, pdu_len); break; + case BT_ATT_OP_PREP_WRITE_RSP: + success = handle_prep_write_rsp(att, opcode, pdu, pdu_len); + break; default: success = false; util_debug(att->debug_callback, att->debug_data, -- 2.0.0.526.g5318336