SmartPDCode/pro/src/sys.c

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <limits.h>
#include "elog.h"
#include "sys.h"
#include "upgrade.h"
#include "paras.h"
#include "cfg.h"
#include "file.h"
#include "thread.h"
#include "sqlite_handle.h"

#if 0
#define LOGE  log_e
#define LOGW  log_w
#define LOGD  log_d
#else
#define LOGD  printf
#define LOGW  printf
#define LOGE  printf
#endif


//#define USE_BASH
#define USE_FILE
//#define USE_API

#define DFLT_NIC            "eth0"
//#define FILE_NET          "/root/interfaces"
#define FILE_NET            "/etc/network/interfaces"
#define FILE_DNS            "/etc/dnsmasq.conf"


typedef struct {
	char *pbuf;
    int  dlen;
    int  blen;
}node_t;
static int set_net(NetworkInfo_t *para, int ipv);


static int node_free(node_t *nd)
{
    if(!nd) {
        return -1;
    }

    free(nd->pbuf);
    nd->pbuf = NULL;
    nd->dlen = 0;
    nd->blen = 0;

    return 0;
}

static int exe_cmd(char *cmd, node_t *nd)
{
    int r=0;
	FILE *fp=NULL;
    char *pbuf=NULL;
    int onelen=1000;
    int dlen=0,blen=onelen;
    
    fp = popen(cmd, "r");
    if (fp == NULL) {
        return -1;
    }

    if(nd) {
        pbuf = malloc(onelen);
        while(pbuf) {
            r = fread(pbuf+dlen, sizeof(char), onelen, fp);
            if(r<=0) {
                LOGE("exe_cmd fread failed\n");
                break;
            }
            dlen += r;
            if(dlen+onelen>blen) {
                char* p = realloc(pbuf, dlen+onelen);
                if(!p) {
                    LOGE("exe_cmd relloac %d failed\n", dlen+onelen);
                    free(pbuf); pclose(fp);
                    return -1;
                }
                pbuf = p;
                blen = dlen+onelen;
            }
        }
        
        nd->pbuf = pbuf;
        nd->dlen = dlen;
        nd->blen = blen;
    }
    pclose(fp);
    
	return 0;
}

////////////////////////////////////////////////////////////////////
int sys_reboot(void)
{
    int r=0;

    r = system("reboot");
    if(r) {
        LOGE("sys_reboot failed!\n");
        return -1;
    }

    return r;
}


#include "upgrade.h"
int sys_set_factory(void)
{
    int r=0;

#ifdef KEY_PARAS_IN_FILE
    r = paras_reset();
#else
    char dir[100],src[200],dst[200];

    extern GlobalDeviceManager __globalDeviceManage;
    sqlite_deinit(__globalDeviceManage.db, &__globalDeviceManage.dbThreadlock);

    sys_get_path(dir, "");
    snprintf(src, sizeof(src), "%s/%s", dir, DATABASE_BAK_NAME);
    snprintf(dst, sizeof(dst), "%s/%s", dir, DATABASE_NAME);

    LOGD("___ file_copy from %s to %s\n", src, dst);
    r = file_copy(dst, src);
    if(r==0) {
    #if 0
        r = set_net(&DFLT_PARAS.dev._network_info, IP_V4);
        if(r) {
            LOGE("____ set_net failed\n");
            return -1;
        }
    #endif

        LOGD("____ exit smartPDU now ...\n");
        exit(0);
    }
#endif

    return r;
}


int sys_get_path(char *path, char *name)
{
    char tmp[500];

    pid_t pid = getpid();
    snprintf(tmp, sizeof(tmp), "/proc/%d/exe", pid); 
    readlink(tmp, path, sizeof(tmp));
    char *p = strrchr(path, '/');
    if(p && strlen(path)>1) {
        *p = 0;
        if(p && strlen(name)>0) {
            strcat(path, "/");
            strcat(path, name);
        }
    }
    
    return 0;
}

////////////////////////////////////////////////
#include <net/if.h>
#include <sys/socket.h>
#include <net/route.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <net/if.h>
#include <ifaddrs.h>
#include <netinet/in.h>
#include <linux/if.h>
#include <linux/if_link.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>

void print_net(char*s, NetworkInfo_t *p)
{
    LOGD("__%s__net.mode:    %d\n", s, p->mode);
    LOGD("__%s__net.addr:    %s\n", s, p->ip_address);
    LOGD("__%s__net.mask:    %s\n", s, p->mask);
    LOGD("__%s__net.gateway: %s\n", s, p->gateway);
    LOGD("__%s__net.dns1:    %s\n", s, p->dns1);
    LOGD("__%s__net.dns2:    %s\n", s, p->dns2);
}
void print_modbus(char*s, ModbusInfo_t *p)
{
    LOGD("__%s__mbus.mode:    %d\n", s, p->product_modbus_type);
    LOGD("__%s__mbus.addr:    %d\n", s, p->product_modbus_baud);
    LOGD("__%s__mbus.mask:    %d\n", s, p->product_modbus_addr);
    LOGD("__%s__mbus.mask:    %s\n", s, p->product_relay_ctrl_port);
}

static int set_ipaddr(int family, const char* iface, const char* addr, const char* netmask)
{
    struct ifreq ifr;
    struct sockaddr_in  *sin;
    struct sockaddr_in6 *sin6;
     
    int fd = socket(family, SOCK_DGRAM, 0);
    if (fd < 0) {
        LOGD("socket SOCK_DGRAM failed\n");
        return -1;
    }
 
    strcpy(ifr.ifr_name, iface);
    sin  = (struct sockaddr_in*)&ifr.ifr_addr;
    sin6 = (struct sockaddr_in6*)&ifr.ifr_addr;

    if(family==AF_INET) {
        sin->sin_family = family;
        sin->sin_port = 0;
        inet_pton(family, addr, &sin->sin_addr);
     
        if (ioctl(fd, SIOCSIFADDR, &ifr) < 0) {
            LOGD("ioctl SIOCSIFADDR \n");
            close(fd);
            return -1;
        }
     
        sin->sin_family = family;
        inet_pton(family, netmask, &sin->sin_addr);
        if (ioctl(fd, SIOCSIFNETMASK, &ifr) < 0) {
            LOGD("ioctl SIOCSIFNETMASK \n");
            close(fd);
            return -1;
        }
    }
    else {
        sin6->sin6_family = family;
        sin6->sin6_port = 0;
        inet_pton(family, addr, &sin6->sin6_addr);
     
        if (ioctl(fd, SIOCSIFADDR, &ifr) < 0) {
            LOGD("ioctl SIOCSIFADDR \n");
            close(fd);
            return -1;
        }
     
        sin6->sin6_family = family;
        inet_pton(family, netmask, &sin6->sin6_addr);
        if (ioctl(fd, SIOCSIFNETMASK, &ifr) < 0) {
            LOGD("ioctl SIOCSIFNETMASK \n");
            close(fd);
            return -1;
        }
    }
    close(fd);
    
    return 0;
}
static int get_ipaddr(int family, char* iface, char* addr, char* netmask)
{
    struct ifaddrs *ifap, *ifa;

    if (getifaddrs(&ifap) == -1) {
        LOGE("getifaddrs() error\n");
        return -1;
    }

    for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
        if (ifa->ifa_addr != NULL && ifa->ifa_addr->sa_family == family) {
            if(family==IP_V4) {
                struct sockaddr_in *sa,*msk;
                sa = (struct sockaddr_in *)  ifa->ifa_addr;
                msk = (struct sockaddr_in *) ifa->ifa_netmask;

                inet_ntop(family, &sa->sin_addr,  addr,    INET6_ADDRSTRLEN);
                inet_ntop(family, &msk->sin_addr, netmask, INET6_ADDRSTRLEN);
            }
            else {
                struct sockaddr_in6 *sa,*msk;
                sa = (struct sockaddr_in6 *)  ifa->ifa_addr;
                msk = (struct sockaddr_in6 *) ifa->ifa_netmask;
                
                inet_ntop(family, &sa->sin6_addr,  addr,    INET6_ADDRSTRLEN);
                inet_ntop(family, &msk->sin6_addr, netmask, INET6_ADDRSTRLEN);
            }
        }
    }
    freeifaddrs(ifap);
    
    return 0;
}

static int set_gateway(int family, const char* gateway)
{
    struct rtentry rt;
    
    int fd;
 
    fd = socket(family, SOCK_DGRAM, 0);
    if (fd < 0) {
        LOGE("socket SOCK_DGRAM failed\n");
        return -1;
    }
 
    memset(&rt, 0, sizeof(rt));

    if(family==AF_INET) {
        struct sockaddr_in* sin;
        sin = (struct sockaddr_in*)&rt.rt_gateway;
        sin->sin_family = family;
        sin->sin_port = 0;
        inet_pton(family, gateway, &sin->sin_addr);
     
        sin = (struct sockaddr_in*)&rt.rt_dst;
        sin->sin_family = family;
        sin->sin_addr.s_addr = 0;
    }
    else {
        struct sockaddr_in6* sin;
        sin = (struct sockaddr_in6*)&rt.rt_gateway;
        sin->sin6_family = family;
        sin->sin6_port = 0;
        inet_pton(family, gateway, &sin->sin6_addr);
     
        sin = (struct sockaddr_in6*)&rt.rt_dst;
        sin->sin6_family = family;
        //sin->sin6_addr.s_addr[0] = 0;
    }
 
    rt.rt_flags = RTF_GATEWAY;
    if (ioctl(fd, SIOCADDRT, &rt) < 0) {
        LOGE("ioctl SIOCADDRT failed\n");
        close(fd);
        return -1;
    }
    close(fd);
    
    return 0;

}
static int get_gateway(int family, const char* gateway)
{
#if 0
    int sockfd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
    if (sockfd == -1) {
        log_e("set_gateway, socket AF_NETLINK error\n");
        return -1;
    }

    struct sockaddr_nl sa;
    memset(&sa, 0, sizeof(sa));
    sa.nl_family = AF_NETLINK;
    if (bind(sockfd, (struct sockaddr *) &sa, sizeof(sa)) == -1) {
        log_e("set_gateway, bind error\n");
        return -1;
    }
    
    struct nlreq req;
    memset(&req, 0, sizeof(req));
    req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
    req.hdr.nlmsg_type = RTM_GETROUTE;
    req.hdr.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP;
    req.msg.rtm_family = family;
    req.msg.rtm_table = RT_TABLE_MAIN;
    req.msg.rtm_protocol = RTPROT_UNSPEC;
    req.msg.rtm_scope = RT_SCOPE_UNIVERSE;
    req.msg.rtm_type = RTN_UNICAST;

    struct iovec iov;
    memset(&iov, 0, sizeof(iov));
    iov.iov_base = &req;
    iov.iov_len = req.hdr.nlmsg_len;

    struct msghdr msg;
    memset(&msg, 0, sizeof(msg));
    msg.msg_name = &sa;
    msg.msg_namelen = sizeof(sa);
    msg.msg_iov = &iov;
    msg.msg_iovlen = 1;
    
    char buf[BUFSIZE];
    memset(buf, 0, sizeof(buf));
    struct nlmsghdr *hdr;
    int len;
    if (sendmsg(sockfd, &msg, 0) == -1) {
        log_e("set_gateway, sendmsg error\n");
        return -1;
    }
    while ((len = recv(sockfd, buf, sizeof(buf), 0)) > 0) {
        for (hdr = (struct nlmsghdr *) buf; NLMSG_OK(hdr, len); hdr = NLMSG_NEXT(hdr, len)) {
            if (hdr->nlmsg_type == NLMSG_DONE) {
                goto finish;
            }
            if (hdr->nlmsg_type == NLMSG_ERROR) {
                log_e("set_gateway, NLMSG_ERROR\n");
                return -1;
            }
            struct rtmsg *rt = (struct rtmsg *) NLMSG_DATA(hdr);
            if (rt->rtm_family != family || rt->rtm_table != RT_TABLE_MAIN || rt->rtm_type != RTN_UNICAST) {
                continue;
            }
            struct rtattr *attr;
            int attrlen;
            for (attr = (struct rtattr *) RTM_RTA(rt), attrlen = RTM_PAYLOAD(hdr); RTA_OK(attr, attrlen); attr = RTA_NEXT(attr, attrlen)) {
                if (attr->rta_type == RTA_GATEWAY) {
                    char gw_addr[INET_ADDRSTRLEN];
                    struct in_addr addr;
                    memcpy(&addr, RTA_DATA(attr), sizeof(addr));
                    if (inet_ntop(family, &addr, gateway, INET6_ADDRSTRLEN) == NULL) {
                        log_e("set_gateway, inet_ntop error\n");
                        continue;
                    }
                    printf("Gateway address: %s\n", gw_addr);
                    log_i("set_gateway, Gateway address: %s\n");
                    goto finish;
                }
            }
        }
    }
finish:
    close(sockfd);
#endif

    return 0;
}
static int set_dhcp(int on)
{
    if(on) {
        system("killall udhcpc && udhcpc –i eth0 –s /usr/share/udhcpc/default.script &");
    }
    else {
        system("killall udhcpc");
    }
    return 0;
}
static int is_number(char *str)
{
    while (*str) {
        if (!isdigit(*str)) {
            return 0;
        }
        str++;
    }
    return 1;
}
static int ip_check(char* addr)
{
    int flag=IP_ERR;
    struct in_addr addr4;
    struct in6_addr addr6;

    if (inet_pton(AF_INET, addr, &addr4) == 1) {
        flag = IP_V4;
    } else if (inet_pton(AF_INET6, addr, &addr6) == 1) {
        flag = IP_V6;
    }

    if(flag==IP_ERR) {
        LOGE("____ wrong ip addr: %s\n", addr);
    }
    
    return flag;
}
static int is_ipv6_prefix(char *ss)
{
    if(is_number(ss)) {
        int val = atoi(ss);
        if(val>1 && val<128) {
            return 1;
        }
    }

    return 0;
}


///////////////////////////////////////////////
typedef struct {
    char lo[1000];
    char e0[1000];
    char e1[1000];
}interface_t;
typedef uint32_t u32;
#define XLEN(a,b)  ((u32)(a)-(u32)(b))
typedef struct {
    char *ptr;
    int  len;
}nic_t;


static int get_nic(char *nbuf, int nlen, char *nic, char *fbuf, int flen)
{
    int r,xlen;
    char tmp[20];
    char *p1,*p2;
    char *fend=fbuf+flen-1;

    sprintf(tmp, "auto %s", nic);
    p1 = strstr(fbuf, tmp);
    if(!p1) {
        return -1;
    }
    p2 = strstr(p1+1, "auto");
    if(!p2 || p2>fend) {
        p2 = fend;
    }

    xlen = XLEN(p2,p1);
    memcpy(nbuf, p1, xlen);
    nbuf[xlen] = 0;

    return 0;
}
static int get_ip(char *nbuf, char *token, char *ipaddr, int ipv)
{
    int cnt=0;
    char *p,*p1,*p2;
    char *pbuf=NULL;

    if(ipv==IP_V4) {
        pbuf = strstr(nbuf, "inet");
    }
    else {
        pbuf = strstr(nbuf, "inet6");
    }
    if(pbuf==NULL) {
        LOGE("___get_ip, not found inet or inet6\n");
        return -1;
    }

    p = strstr(pbuf, token);
    if(p) {
        p += strlen(token);

        while(isspace(*p)) p++;
        p1 = p;
        while(!isspace(*p)) p++;
        p2 = p;

        for(p=p1; p<p2; p++) {
            if(isgraph(*p)) {
                ipaddr[cnt++] = *p;
            }
        }
        ipaddr[cnt] = 0;

        return 0;
    }
    return -1;
}
static int get_dns(char *nbuf, char *dns1, char *dns2)
{
    int cnt;
    char *p1,*p2;
    char *token="server=";

    p1 = strstr(nbuf, token);
    if(p1==NULL) {
        dns1[0] = 0;
        return -1;
    }

    p1 += strlen(token); cnt=0;
    while(!isspace(*p1)) {
        dns1[cnt++] = *p1;
        p1++;
    }
    dns1[cnt] = 0;

    p2 = strstr(p1, token);
    if(p2==NULL) {
        dns2[0] = 0;
        return -1;
    }

    p2 += strlen(token); cnt=0;
    while(!isspace(*p2)) {
        dns2[cnt++] = *p2;
        p2++;
    }
    dns2[cnt] = 0;

    return 0;
}
static int set_dns(NetworkInfo_t *para)
{
    int r;
    char tmp[100];
    char buf[500];
    
    LOGD("_____ set_dns\n");

    int chk1=ip_check(para->dns1);
    int chk2=ip_check(para->dns2);
    if( chk1==IP_ERR && chk2==IP_ERR) {
        LOGE("___ dns1 and dns2 are all wrong!\n");
        return -1;
    }

    memset(buf, 0, sizeof(buf));
    strcpy(buf, "interface=eth0\n");

    if(chk1) {
        sprintf(tmp, "server=%s\n", para->dns1);
        strcat(buf, tmp);
    }
    if(chk2) {
        sprintf(tmp, "server=%s\n", para->dns2);
        strcat(buf, tmp);
    }

    r = file_save(FILE_DNS, buf, strlen(buf))+1;
    if(r==0) {
        system("killall dnsmasq; /usr/sbin/dnsmasq &");
    }

    return r;
}
static int get_net(NetworkInfo_t *para, int ipv)
{
    int r;
    char *p=NULL;
    interface_t intf;
    buf_t fbuf;

    r = file_load(FILE_NET, &fbuf);
    if(r) {
        return -1;
    }
    
    memset(&intf, 0, sizeof(intf));
    get_nic(intf.lo, sizeof(intf.lo), "lo",   fbuf.buf, fbuf.dlen);
    get_nic(intf.e0, sizeof(intf.e0), "eth0", fbuf.buf, fbuf.dlen);
    get_nic(intf.e1, sizeof(intf.e1), "eth1", fbuf.buf, fbuf.dlen);

    p = strstr(intf.e0, (ipv==IP_V4)?"inet":"inet6");
    if(p==NULL) {
        LOGE("___get_ipv%d, %s not found!\n", (ipv==IP_V4)?4:6, (ipv==IP_V4)?"inet":"inet6");
        free(fbuf.buf); return -1;
    }
    
    if(strstr(p, "dhcp")) {
        para->mode = 0;
    }
    else if(strstr(p, "static")) {
        para->mode = 1;
    } else {
        LOGE("___get_net, dhcp/static not found!\n");
        free(fbuf.buf); return -1;
    }

    get_ip(p, "address", para->ip_address, ipv);
    get_ip(p, "netmask", para->mask, ipv);
    get_ip(p, "gateway", para->gateway, ipv);
    free(fbuf.buf);

    r = file_load(FILE_DNS, &fbuf);
    if(r) {
        return -1;
    }
    get_dns(fbuf.buf, para->dns1, para->dns2);

    return 0;
}
static int nw_check(NetworkInfo_t *para, int ipv)
{
    if(ipv==IP_V4) {
        if((ip_check(para->ip_address)!=IP_V4) || (ip_check(para->mask)!=IP_V4) || (ip_check(para->gateway)!=IP_V4)) {
            return -1;
        }
    }
    else {
        if((ip_check(para->ip_address)!=IP_V6) || (!is_ipv6_prefix(para->mask)) || (ip_check(para->gateway)!=IP_V6)) {
            return -1;
        }
    }

    return 0;
}
static int set_net(NetworkInfo_t *para, int ipv)
{
    int r,ipv2;
    char *p1,*p2,*p3,*p4;
    int flen=100*1000;
    NetworkInfo_t info4,info6,*info;

    get_net(&info4, IP_V4);
    get_net(&info6, IP_V6);

    info = ((ipv==IP_V4)?&info4:&info6);
    
    if(para->mode<2 && para->mode!=info->mode) {
        info->mode = para->mode;
    }
    
    ipv2 = ip_check(para->ip_address);
    if((ipv==ipv2) && strcmp(para->ip_address, info->ip_address)) {
        strcpy(info->ip_address, para->ip_address);
    }
    
    if(ipv==IP_V4) {
        ipv2 = ip_check(para->mask);
    }
    else {
        ipv2=is_ipv6_prefix(para->mask)?IP_V6:IP_ERR;
    }
    if((ipv==ipv2) && strcmp(para->mask, info->mask)) {
        strcpy(info->mask, para->mask);
    }

    ipv2 = ip_check(para->gateway);
    if((ipv==ipv2) && strcmp(para->gateway, info->gateway)) {
        strcpy(info->gateway, para->gateway);
    }
 
    char *fbuf=malloc(flen);
    if(!fbuf) {
        LOGE("___ malloc %d failed\n", flen);
        return -1;
    }

#if 0
    file_load(FILE_NET, fbuf);

    get_nic(pNet->lo, sizeof(pNet->lo), "lo",   fbuf, flen);
    get_nic(pNet->e1, sizeof(pNet->e1), "eth1", fbuf, flen);

    snprintf(pNet->e0, sizeof(pNet->e0), "auto eth0\niface eth0 inet %s\n  address %s\n  netmask %s\n  gateway %s\n\n", 
                              info4.mode?"static":"dhcp", info4.ip_address, info4.mask, info4.gateway);
    strcpy(fbuf, pNet->lo);
    strcat(fbuf, pNet->e0);
    strcat(fbuf, pNet->e1);  
#else
    char *lo="auto lo\niface lo inet loopback\n\n";
    char *eth1="auto eth1\niface eth1 inet dhcp\npre-up /etc/network/nfs_check\nwait-delay 5\nhostname $(hostname)\n";
    char eth0[1000];

    int chk4=nw_check(&info4, IP_V4);
    int chk6=nw_check(&info6, IP_V6);
    char temp[400];

    strcpy(eth0, "auto eth0\n");
    if(chk4==0) {
        sprintf(temp, "iface eth0 inet %s\n  address %s\n  netmask %s\n  gateway %s\n\n",  (info4.mode==IP_STATIC)?"static":"dhcp", info4.ip_address, info4.mask, info4.gateway);
        strcat(eth0, temp);
    }

    if(chk6==0) {
        sprintf(temp, "iface eth0 inet6 %s\n  address %s\n  netmask %s\n  gateway %s\n\n",  (info6.mode==IP_STATIC)?"static":"dhcp", info6.ip_address, info6.mask, info6.gateway);
        strcat(eth0, temp);
    }
    sprintf(fbuf, "%s%s%s", lo, eth0, eth1);
#endif
    //LOGD("___interfaces___:\n%s", fbuf);

    r = file_save(FILE_NET, fbuf, strlen(fbuf)); free(fbuf);

    return r;
}

//////////////////////////////////////////////////////////////////////////////
int sys_set_net(NetworkInfo_t *para, int ipVersion)
{
    int r,ipv;

#ifdef USE_BASH
    char cmd[200];

    snprintf(cmd, sizeof(cmd), "ip addr flush dev %s", DFLT_NIC);
    r = system(cmd);
    if(r) {
        LOGE("set ipaddr failed\n");
        return -1;
    }

    snprintf(cmd, sizeof(cmd), "ip addr add %s/%s dev %s", para->ip_address, para->mask, DFLT_NIC);
    r = system(cmd);
    if(r) {
        LOGE("set netmask %s failed\n", para->mask);
        return -1;
    }

    snprintf(cmd, sizeof(cmd), "ip route add default via %s dev %s", para->gateway, DFLT_NIC);
    r = system(cmd);
    if(r) {
        LOGE("set gateway %s failed\n", para->gateway);
        return -1;
    }

    snprintf(cmd, sizeof(cmd), "ip link set dev %s up", DFLT_NIC);
    r = system(cmd);
    if(r) {
        LOGE("restart %s failed\n", DFLT_NIC);
        return -1;
    }

#elif defined USE_FILE
    NetworkInfo_t para2;
    r = get_net(&para2, ipVersion);
    if(r==0) {
        if(memcmp(para, &para2, sizeof(NetworkInfo_t))==0) {
            LOGW("%s NetworkInfo is same, no need to set\n", DFLT_NIC);
            return -1;
        }
        set_dns(para);
        r = set_net(para, ipVersion);
        if(r==0) {
            //system("ip addr flush dev eth0");
            //sprintf(eth0, "ip link set dev eth0 %s/%d && ip link set eth0 up && ip link set eth0 down", info->ip_address, info->netmask);
            //system(eth0);
            system("ifdown eth0 && ifup eth0");
            if(ipVersion==IP_V6) exit(0);
        }
    }
    else {
        LOGE("get_net failed\n");
    }

#elif defined USE_API
    if(para->mode==IP_DHCP) {
        r = set_dhcp(1);
    }
    else {
        set_dhcp(0);

        int family=(ipv==IP_V4)?AF_INET:AF_INET6;
        r = set_ipaddr(family, "eth0", para->ip_address, para->mask);
        if(r) {
            LOGE("set_ipaddr failed\n");
            return r;
        }
        
        r = set_gateway(family, para->gateway);
        if(r) {
            LOGE("set_gateway failed\n");
            return r;
        }

        r = set_dns(family, "eth0", para->dns1, para->dns2);
        if(r) {
            LOGE("set_dns failed\n");
            return r;
        }
    }
#endif
    
    return r;
}

int sys_get_net(NetworkInfo_t *para, int ipVersion)
{
    int r;
    int family=AF_INET;
#ifdef USE_BASH
    

#elif defined USE_FILE
    r = get_net(para, ipVersion);
#elif defined USE_API  
    r = get_ipaddr(family, DFLT_NIC, para->ip_address, para->mask);
    if(r) {
        LOGE("set_ipaddr failed\n");
        return r;
    }
    
    r = get_gateway(family, para->gateway);
    if(r) {
        LOGE("set_gateway failed\n");
        return r;
    }

    r = get_dns(family, DFLT_NIC, para->dns1, para->dns2);
    if(r) {
        LOGE("set_dns failed\n");
        return r;
    }
#endif

    return r;
}


#define MAX_BUFFER_SIZE 4096
static void* plug_thread(void *arg)
{
    int nlSock;
    struct sockaddr_nl srcAddr;
    struct nlmsghdr *nlMsg;
    char buffer[MAX_BUFFER_SIZE];
    int plug_in=0,plug_out=0;

    printf("___plug_thread start\n");

    nlSock = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
    if (nlSock < 0) {
        printf("Failed to create Netlink socket");
        goto quit;
    }

    memset(&srcAddr, 0, sizeof(srcAddr));
    srcAddr.nl_family = AF_NETLINK;
    srcAddr.nl_groups = RTMGRP_LINK | RTMGRP_NOTIFY;

    if (bind(nlSock, (struct sockaddr *)&srcAddr, sizeof(srcAddr)) < 0) {
        perror("Failed to bind Netlink socket");
        close(nlSock);
        goto quit;
    }

	int flags = fcntl(nlSock, F_GETFL, 0);
    fcntl(nlSock, F_SETFL, flags | O_NONBLOCK);

    while (1) {
        fd_set readSet;
        FD_ZERO(&readSet);
        FD_SET(nlSock, &readSet);

        // 设置超时时间为 1 秒
        struct timeval timeout;
        timeout.tv_sec = 1;
        timeout.tv_usec = 0;

        // 监视 Netlink Socket 的可读状态
        int result = select(nlSock + 1, &readSet, NULL, NULL, &timeout);
        if (result == -1) {
            perror("Failed to select");
            goto quit;
        } else if (result == 0) {
            // 超时，没有新数据到达
            //printf("Timeout\n");
            continue;
        }

        if (FD_ISSET(nlSock, &readSet)) {
            // 接收消息
            int bytesRead = recv(nlSock, buffer, MAX_BUFFER_SIZE, 0);
            if (bytesRead < 0) {
                perror("Failed to receive message from Netlink socket");
                close(nlSock);
                goto quit;
            }

            // 遍历接收到的消息,获取到Netlink的消息头。
            nlMsg = (struct nlmsghdr *)buffer;
            while (NLMSG_OK(nlMsg, bytesRead)) {
                if (nlMsg->nlmsg_type == NLMSG_DONE) {
                    break;
                }

                if (nlMsg->nlmsg_type == RTM_NEWLINK || nlMsg->nlmsg_type == RTM_DELLINK) {
                    //NLMSG_DATA()获取完整的ifinfomsg结构体的指针
                    //根据消息头nlMsg获取到其后面的数据部分ifinfomsg结构体的指针
                    struct ifinfomsg *ifInfo = (struct ifinfomsg *)NLMSG_DATA(nlMsg);
                    if (ifInfo->ifi_family == AF_UNSPEC) {
                        //获取路由信息的属性，以及消息负载的长度，通过这两个参数来判断本次的数据是否有效
                        struct rtattr *attribute = IFLA_RTA(ifInfo);
                        int attributeLen = IFLA_PAYLOAD(nlMsg);
                        
                        while (RTA_OK(attribute, attributeLen)) {
                            char *ifaceName = (char *)RTA_DATA(attribute);
                            if ((attribute->rta_type == IFLA_IFNAME) && (strcmp(ifaceName, "eth0")==0)) {
                            
                                //printf("____Interface: %s \n", ifaceName);
                                if((ifInfo->ifi_flags & IFF_LOWER_UP)) {
                                    if(plug_in==0) {
                                        system("ifup eth0");
                                        printf("____eth0 plug in\n");
                                        plug_in = 1; plug_out = 0;
                                    }
                                }
                                else  {
                                    if(plug_out==0) {
                                        system("ifdown eth0");
                                        printf("____eth0 plug out\n");
                                        plug_in = 0; plug_out = 1;
                                    }
                                }
                            }
                            attribute = RTA_NEXT(attribute, attributeLen);
                        }
                    }
                }
                nlMsg = NLMSG_NEXT(nlMsg, bytesRead);
            }
        }
    }

    close(nlSock);

quit:
    printf("___plug_thread exit\n");
    pthread_exit(NULL);
}


int sys_init(void)
{
    //thread_start(THREAD_ID_PLUG, plug_thread, NULL, 4*MB, 0);

    return 0;
}