1 /******************************************************************************
2  *
3  *  Copyright 2009-2012 Broadcom Corporation
4  *
5  *  Licensed under the Apache License, Version 2.0 (the "License");
6  *  you may not use this file except in compliance with the License.
7  *  You may obtain a copy of the License at:
8  *
9  *  http://www.apache.org/licenses/LICENSE-2.0
10  *
11  *  Unless required by applicable law or agreed to in writing, software
12  *  distributed under the License is distributed on an "AS IS" BASIS,
13  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  *  See the License for the specific language governing permissions and
15  *  limitations under the License.
16  *
17  ******************************************************************************/
18 
19 #define LOG_TAG "bt_btif_sock"
20 
21 #include "btif_sock_util.h"
22 
23 #include <arpa/inet.h>
24 #include <errno.h>
25 #include <netinet/in.h>
26 #include <netinet/tcp.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <sys/ioctl.h>
31 #include <sys/socket.h>
32 #include <sys/types.h>
33 #include <sys/un.h>
34 #include <unistd.h>
35 
36 #include <hardware/bluetooth.h>
37 #include <hardware/bt_sock.h>
38 
39 #include "bt_common.h"
40 #include "bt_target.h"
41 #include "bta_api.h"
42 #include "bta_jv_api.h"
43 #include "bta_jv_co.h"
44 #include "btif_common.h"
45 #include "btif_sock_sdp.h"
46 #include "btif_sock_thread.h"
47 #include "btif_util.h"
48 #include "btm_api.h"
49 #include "btm_int.h"
50 #include "btu.h"
51 #include "hcimsgs.h"
52 #include "osi/include/log.h"
53 #include "port_api.h"
54 #include "sdp_api.h"
55 
56 #define asrt(s)                                                              \
57   do {                                                                       \
58     if (!(s))                                                                \
59       BTIF_TRACE_ERROR("## %s assert %s failed at line:%d ##", __func__, #s, \
60                        __LINE__)                                             \
61   } while (0)
62 
63 int sock_send_all(int sock_fd, const uint8_t* buf, int len) {
64   int s = len;
65 
66   while (s) {
67     ssize_t ret;
68     OSI_NO_INTR(ret = send(sock_fd, buf, s, 0));
69     if (ret <= 0) {
70       BTIF_TRACE_ERROR("sock fd:%d send errno:%d, ret:%d", sock_fd, errno, ret);
71       return -1;
72     }
73     buf += ret;
74     s -= ret;
75   }
76   return len;
77 }
78 int sock_recv_all(int sock_fd, uint8_t* buf, int len) {
79   int r = len;
80 
81   while (r) {
82     ssize_t ret;
83     OSI_NO_INTR(ret = recv(sock_fd, buf, r, MSG_WAITALL));
84     if (ret <= 0) {
85       BTIF_TRACE_ERROR("sock fd:%d recv errno:%d, ret:%d", sock_fd, errno, ret);
86       return -1;
87     }
88     buf += ret;
89     r -= ret;
90   }
91   return len;
92 }
93 
94 int sock_send_fd(int sock_fd, const uint8_t* buf, int len, int send_fd) {
95   struct msghdr msg;
96   unsigned char* buffer = (unsigned char*)buf;
97   memset(&msg, 0, sizeof(msg));
98 
99   struct cmsghdr* cmsg;
100   char msgbuf[CMSG_SPACE(1)];
101   asrt(send_fd != -1);
102   if (sock_fd == -1 || send_fd == -1) return -1;
103   // Add any pending outbound file descriptors to the message
104   // See "man cmsg" really
105   msg.msg_control = msgbuf;
106   msg.msg_controllen = sizeof msgbuf;
107   cmsg = CMSG_FIRSTHDR(&msg);
108   cmsg->cmsg_level = SOL_SOCKET;
109   cmsg->cmsg_type = SCM_RIGHTS;
110   cmsg->cmsg_len = CMSG_LEN(sizeof send_fd);
111   memcpy(CMSG_DATA(cmsg), &send_fd, sizeof send_fd);
112 
113   // We only write our msg_control during the first write
114   int ret_len = len;
115   while (len > 0) {
116     struct iovec iv;
117     memset(&iv, 0, sizeof(iv));
118 
119     iv.iov_base = buffer;
120     iv.iov_len = len;
121 
122     msg.msg_iov = &iv;
123     msg.msg_iovlen = 1;
124 
125     ssize_t ret;
126     OSI_NO_INTR(ret = sendmsg(sock_fd, &msg, MSG_NOSIGNAL));
127     if (ret < 0) {
128       BTIF_TRACE_ERROR("fd:%d, send_fd:%d, sendmsg ret:%d, errno:%d, %s",
129                        sock_fd, send_fd, (int)ret, errno, strerror(errno));
130       ret_len = -1;
131       break;
132     }
133 
134     buffer += ret;
135     len -= ret;
136 
137     // Wipes out any msg_control too
138     memset(&msg, 0, sizeof(msg));
139   }
140   BTIF_TRACE_DEBUG("close fd:%d after sent", send_fd);
141   // TODO: This seems wrong - if the FD is not opened in JAVA before this is
142   // called
143   //       we get a "socket closed" exception in java, when reading from the
144   //       socket...
145   close(send_fd);
146   return ret_len;
147 }
148