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 #include "param_message.h"
16
17 #include <sys/socket.h>
18 #include <sys/un.h>
19
20 #include "param_utils.h"
21 #include "securec.h"
22
ConnectServer(int fd,const char * servername)23 int ConnectServer(int fd, const char *servername)
24 {
25 PARAM_CHECK(fd >= 0, return -1, "Invalid fd %d", fd);
26 PARAM_CHECK(servername != NULL, return -1, "Invalid servername");
27 int opt = 1;
28 int ret = setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &opt, sizeof(opt));
29 PARAM_CHECK(ret == 0, return -1, "Failed to set socket option");
30 struct sockaddr_un addr;
31 /* fill socket address structure with server's address */
32 ret = memset_s(&addr, sizeof(addr), 0, sizeof(addr));
33 PARAM_CHECK(ret == 0, return -1, "Failed to memset server address");
34 addr.sun_family = AF_UNIX;
35 ret = sprintf_s(addr.sun_path, sizeof(addr.sun_path) - 1, "%s", servername);
36 PARAM_CHECK(ret > EOK, return -1, "Failed to sprintf_s server address");
37 socklen_t len = offsetof(struct sockaddr_un, sun_path) + strlen(addr.sun_path);
38 ret = connect(fd, (struct sockaddr *)&addr, len);
39 PARAM_CHECK(ret != -1, return -1, "Failed to connect server %s %d", servername, errno);
40 PARAM_LOGV("ConnectServer %s success", servername);
41 return 0;
42 }
43
FillParamMsgContent(const ParamMessage * request,uint32_t * start,int type,const char * value,uint32_t length)44 int FillParamMsgContent(const ParamMessage *request, uint32_t *start, int type, const char *value, uint32_t length)
45 {
46 PARAM_CHECK(request != NULL && start != NULL, return -1, "Invalid param");
47 PARAM_CHECK(value != NULL, return -1, "Invalid value");
48 uint32_t bufferSize = request->msgSize - sizeof(ParamMessage);
49 uint32_t offset = *start;
50 PARAM_CHECK((offset + sizeof(ParamMsgContent) + length) <= bufferSize,
51 return -1, "Invalid msgSize %u offset %u %d", request->msgSize, offset, type);
52 ParamMsgContent *content = (ParamMsgContent *)(request->data + offset);
53 content->type = type;
54 content->contentSize = length + 1;
55 if (length > 0) {
56 int ret = memcpy_s(content->content, content->contentSize - 1, value, length);
57 PARAM_CHECK(ret == EOK, return -1, "Failed to copy value for %d", type);
58 }
59 content->content[length] = '\0';
60 offset += sizeof(ParamMsgContent) + PARAM_ALIGN(content->contentSize);
61 *start = offset;
62 return 0;
63 }
64
CreateParamMessage(int type,const char * name,uint32_t msgSize)65 ParamMessage *CreateParamMessage(int type, const char *name, uint32_t msgSize)
66 {
67 PARAM_CHECK(name != NULL, return NULL, "Invalid name");
68 PARAM_CHECK(msgSize < PARAM_BUFFER_MAX, return NULL, "Invalid msg size %u", msgSize);
69 uint32_t size = msgSize;
70 if (msgSize < sizeof(ParamMessage)) {
71 size = sizeof(ParamMessage);
72 }
73 ParamMessage *msg = (ParamMessage *)calloc(1, size);
74 PARAM_CHECK(msg != NULL, return NULL, "Failed to malloc message");
75 msg->type = type;
76 msg->id.msgId = 0;
77 msg->msgSize = size;
78 int ret = strcpy_s(msg->key, sizeof(msg->key) - 1, name);
79 PARAM_CHECK(ret == EOK, free(msg);
80 return NULL, "Failed to fill name");
81 return msg;
82 }
83
GetNextContent(const ParamMessage * request,uint32_t * offset)84 ParamMsgContent *GetNextContent(const ParamMessage *request, uint32_t *offset)
85 {
86 PARAM_CHECK(request != NULL, return NULL, "Invalid request");
87 PARAM_CHECK(offset != NULL, return NULL, "Invalid offset");
88 ParamMessage *msg = (ParamMessage *)request;
89 if ((*offset + sizeof(ParamMessage) + sizeof(ParamMsgContent)) >= msg->msgSize) {
90 return NULL;
91 }
92 ParamMsgContent *content = (ParamMsgContent *)(msg->data + *offset);
93 *offset += sizeof(ParamMsgContent) + PARAM_ALIGN(content->contentSize);
94 return content;
95 }
96