1 /*
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "init_socket.h"
17 #include <ctype.h>
18 #include <errno.h>
19 #include <fcntl.h>
20 #include <netinet/in.h>
21 #include <sys/types.h>
22 #include <sys/socket.h>
23 #include <sys/stat.h>
24 #include <sys/uio.h>
25 #include <sys/un.h>
26 #include "beget_ext.h"
27 #include "securec.h"
28
29 #define N_DEC 10
30 #define MAX_SOCKET_ENV_PREFIX_LEN 64
31 #define MAX_SOCKET_DIR_LEN 128
32
GetControlFromEnv(const char * path,int length)33 static int GetControlFromEnv(const char *path, int length)
34 {
35 BEGET_CHECK_RETURN_VALUE(path != NULL && length > 0, -1);
36 BEGET_LOGI("GetControlFromEnv path is %s ", path);
37 const char *val = getenv(path);
38 BEGET_ERROR_CHECK(val != NULL, return -1, "GetControlFromEnv val is null %d", errno);
39 errno = 0;
40 int fd = strtol(val, NULL, N_DEC);
41 BEGET_CHECK_RETURN_VALUE(errno == 0, -1);
42 BEGET_LOGI("GetControlFromEnv fd is %d ", fd);
43 BEGET_ERROR_CHECK(fcntl(fd, F_GETFD) >= 0, return -1, "GetControlFromEnv errno %d ", errno);
44 return fd;
45 }
46
GetControlSocket(const char * name)47 int GetControlSocket(const char *name)
48 {
49 BEGET_CHECK_RETURN_VALUE(name != NULL, -1);
50 char path[MAX_SOCKET_ENV_PREFIX_LEN] = {0};
51 BEGET_CHECK_RETURN_VALUE(snprintf_s(path, sizeof(path), sizeof(path) - 1, OHOS_SOCKET_ENV_PREFIX"%s",
52 name) != -1, -1);
53 BEGET_LOGI("GetControlSocket path is %s ", path);
54 int fd = GetControlFromEnv(path, MAX_SOCKET_ENV_PREFIX_LEN);
55 BEGET_ERROR_CHECK(fd >= 0, return -1, "GetControlFromEnv fail ");
56 int addrFamily = 0;
57 socklen_t afLen = sizeof(addrFamily);
58 int ret = getsockopt(fd, SOL_SOCKET, SO_DOMAIN, &addrFamily, &afLen);
59 BEGET_ERROR_CHECK(ret == 0, return -1, "get socket option fail, errno %d ", errno);
60 BEGET_LOGI("socket %s fd %d address family %d", name, fd, addrFamily);
61 if (addrFamily != AF_UNIX) {
62 return fd;
63 }
64 struct sockaddr_un addr;
65 socklen_t addrlen = sizeof(addr);
66 ret = getsockname(fd, (struct sockaddr*)&addr, &addrlen);
67 BEGET_ERROR_CHECK(ret >= 0, return -1, "GetControlSocket errno %d ", errno);
68 char sockDir[MAX_SOCKET_DIR_LEN] = {0};
69 BEGET_CHECK_RETURN_VALUE(snprintf_s(sockDir, sizeof(sockDir), sizeof(sockDir) - 1, OHOS_SOCKET_DIR"/%s",
70 name) != -1, -1);
71 BEGET_LOGI("sockDir %s ", sockDir);
72 BEGET_LOGI("addr.sun_path %s ", addr.sun_path);
73 if (strncmp(sockDir, addr.sun_path, strlen(sockDir)) == 0) {
74 return fd;
75 }
76 return -1;
77 }
78