1 /*- 2 * send_recv.c 3 * 4 * SPDX-License-Identifier: BSD-2-Clause 5 * 6 * Copyright (c) 2001-2002 Maksim Yevmenkin <m_evmenkin@yahoo.com> 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $Id: send_recv.c,v 1.2 2003/05/21 22:40:30 max Exp $ 31 * $FreeBSD$ 32 */ 33 34 #include <sys/types.h> 35 #include <sys/socket.h> 36 #include <sys/time.h> 37 #include <sys/endian.h> 38 #include <assert.h> 39 #include <errno.h> 40 #include <netgraph/bluetooth/include/ng_hci.h> 41 #include <string.h> 42 #include <unistd.h> 43 #include "hccontrol.h" 44 45 /* Send HCI request to the unit */ 46 int 47 hci_request(int s, int opcode, char const *cp, int cp_size, char *rp, int *rp_size) 48 { 49 char buffer[512]; 50 int n; 51 ng_hci_cmd_pkt_t *c = (ng_hci_cmd_pkt_t *) buffer; 52 ng_hci_event_pkt_t *e = (ng_hci_event_pkt_t *) buffer; 53 54 assert(rp != NULL); 55 assert(rp_size != NULL); 56 assert(*rp_size > 0); 57 58 c->type = NG_HCI_CMD_PKT; 59 c->opcode = (uint16_t) opcode; 60 c->opcode = htole16(c->opcode); 61 62 if (cp != NULL) { 63 assert(0 < cp_size && cp_size <= NG_HCI_CMD_PKT_SIZE); 64 65 c->length = (uint8_t) cp_size; 66 memcpy(buffer + sizeof(*c), cp, cp_size); 67 } else 68 c->length = 0; 69 70 if (hci_send(s, buffer, sizeof(*c) + cp_size) == ERROR) 71 return (ERROR); 72 73 again: 74 n = sizeof(buffer); 75 if (hci_recv(s, buffer, &n) == ERROR) 76 return (ERROR); 77 78 if (n < sizeof(*e)) { 79 errno = EMSGSIZE; 80 return (ERROR); 81 } 82 83 if (e->type != NG_HCI_EVENT_PKT) { 84 errno = EIO; 85 return (ERROR); 86 } 87 88 switch (e->event) { 89 case NG_HCI_EVENT_COMMAND_COMPL: { 90 ng_hci_command_compl_ep *cc = 91 (ng_hci_command_compl_ep *)(e + 1); 92 93 cc->opcode = le16toh(cc->opcode); 94 95 if (cc->opcode == 0x0000 || cc->opcode != opcode) 96 goto again; 97 98 n -= (sizeof(*e) + sizeof(*cc)); 99 if (n < *rp_size) 100 *rp_size = n; 101 102 memcpy(rp, buffer + sizeof(*e) + sizeof(*cc), *rp_size); 103 } break; 104 105 case NG_HCI_EVENT_COMMAND_STATUS: { 106 ng_hci_command_status_ep *cs = 107 (ng_hci_command_status_ep *)(e + 1); 108 109 cs->opcode = le16toh(cs->opcode); 110 111 if (cs->opcode == 0x0000 || cs->opcode != opcode) 112 goto again; 113 114 *rp_size = 1; 115 *rp = cs->status; 116 } break; 117 118 default: 119 goto again; 120 } 121 122 return (OK); 123 } /* hci_request */ 124 125 /* Send simple HCI request - Just HCI command packet (no parameters) */ 126 int 127 hci_simple_request(int s, int opcode, char *rp, int *rp_size) 128 { 129 return (hci_request(s, opcode, NULL, 0, rp, rp_size)); 130 } /* hci_simple_request */ 131 132 /* Send HCI data to the unit */ 133 int 134 hci_send(int s, char const *buffer, int size) 135 { 136 assert(buffer != NULL); 137 assert(size >= sizeof(ng_hci_cmd_pkt_t)); 138 assert(size <= sizeof(ng_hci_cmd_pkt_t) + NG_HCI_CMD_PKT_SIZE); 139 140 if (send(s, buffer, size, 0) < 0) 141 return (ERROR); 142 143 return (OK); 144 } /* hci_send */ 145 146 /* Receive HCI data from the unit */ 147 int 148 hci_recv(int s, char *buffer, int *size) 149 { 150 struct timeval tv; 151 fd_set rfd; 152 int n; 153 154 assert(buffer != NULL); 155 assert(size != NULL); 156 assert(*size > sizeof(ng_hci_event_pkt_t)); 157 158 again: 159 FD_ZERO(&rfd); 160 FD_SET(s, &rfd); 161 162 tv.tv_sec = timeout; 163 tv.tv_usec = 0; 164 165 n = select(s + 1, &rfd, NULL, NULL, &tv); 166 if (n <= 0) { 167 if (n < 0) { 168 if (errno == EINTR) 169 goto again; 170 } else 171 errno = ETIMEDOUT; 172 173 return (ERROR); 174 } 175 176 assert(FD_ISSET(s, &rfd)); 177 178 n = recv(s, buffer, *size, 0); 179 if (n < 0) 180 return (ERROR); 181 182 *size = n; 183 184 return (OK); 185 } /* hci_recv */ 186 187