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 "lnn_ip_utils_adapter.h"
17
18 #include <arpa/inet.h>
19 #include <net/if.h>
20 #include <sys/ioctl.h>
21 #include <sys/socket.h>
22 #include <sys/types.h>
23 #include <unistd.h>
24
GetNetworkIfIp(int32_t fd,struct ifreq * req,char * ip,char * netmask,uint32_t len)25 static int32_t GetNetworkIfIp(int32_t fd, struct ifreq *req, char *ip, char *netmask, uint32_t len)
26 {
27 if (ioctl(fd, SIOCGIFFLAGS, (char*)req) < 0) {
28 HILOG_ERROR(SOFTBUS_HILOG_ID, "ioctl SIOCGIFFLAGS fail, errno = %d", errno);
29 return SOFTBUS_ERR;
30 }
31 if (!((uint16_t)req->ifr_flags & IFF_UP)) {
32 HILOG_ERROR(SOFTBUS_HILOG_ID, "interface is not up");
33 return SOFTBUS_ERR;
34 }
35
36 /* get IP of this interface */
37 if (ioctl(fd, SIOCGIFADDR, (char*)req) < 0) {
38 HILOG_ERROR(SOFTBUS_HILOG_ID, "ioctl SIOCGIFADDR fail, errno = %d", errno);
39 return SOFTBUS_ERR;
40 }
41 struct sockaddr_in *sockAddr = (struct sockaddr_in *)&(req->ifr_addr);
42 if (inet_ntop(sockAddr->sin_family, &sockAddr->sin_addr, ip, len) == NULL) {
43 HILOG_ERROR(SOFTBUS_HILOG_ID, "convert ip addr to string failed");
44 return SOFTBUS_ERR;
45 }
46
47 /* get netmask of this interface */
48 if (netmask != NULL) {
49 if (ioctl(fd, SIOCGIFNETMASK, (char*)req) < 0) {
50 HILOG_ERROR(SOFTBUS_HILOG_ID, "ioctl SIOCGIFNETMASK fail, errno = %d", errno);
51 return SOFTBUS_ERR;
52 }
53 sockAddr = (struct sockaddr_in *)&(req->ifr_netmask);
54 if (inet_ntop(sockAddr->sin_family, &sockAddr->sin_addr, netmask, len) == NULL) {
55 HILOG_ERROR(SOFTBUS_HILOG_ID, "convert netmask addr to string failed");
56 return SOFTBUS_ERR;
57 }
58 }
59 return SOFTBUS_OK;
60 }
61
GetNetworkIpByIfName(const char * ifName,char * ip,char * netmask,uint32_t len)62 int32_t GetNetworkIpByIfName(const char *ifName, char *ip, char *netmask, uint32_t len)
63 {
64 if (ifName == NULL || ip == NULL) {
65 HILOG_ERROR(SOFTBUS_HILOG_ID, "ifName or ip buffer is NULL!");
66 return SOFTBUS_INVALID_PARAM;
67 }
68 int32_t fd = socket(AF_INET, SOCK_DGRAM, 0);
69 if (fd < 0) {
70 HILOG_ERROR(SOFTBUS_HILOG_ID, "open socket failed");
71 return SOFTBUS_ERR;
72 }
73 struct ifreq ifr;
74 if (strncpy_s(ifr.ifr_name, sizeof(ifr.ifr_name), ifName, strlen(ifName)) != EOK) {
75 HILOG_ERROR(SOFTBUS_HILOG_ID, "copy netIfName:%{public}s fail", ifName);
76 close(fd);
77 return SOFTBUS_ERR;
78 }
79 if (GetNetworkIfIp(fd, &ifr, ip, netmask, len) != SOFTBUS_OK) {
80 HILOG_ERROR(SOFTBUS_HILOG_ID, "GetNetworkIfIp ifName:%{public}s fail", ifName);
81 close(fd);
82 return SOFTBUS_ERR;
83 }
84 close(fd);
85 return SOFTBUS_OK;
86 }
87