//
// Created by dongwenzhe on 2022/10/9.
//
#include <string>
#include <map>
using namespace std;

#include <sys/ioctl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <net/if.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <memory.h>
#include <cstdlib>
#include "opendhcpd.h"
#include "s2j/cJSON.h"
#include "haywire.h"
#include "misc.h"
#include <net/if_arp.h>
#include <libconfig.h>
#include <zlog.h>
#include "config.h"
#include "proto.h"
#include "user_errno.h"

extern data2   cfig;
extern bool    kRunning;
extern dhcpMap dhcpCache;
extern time_t  t;

static int dhcp_get_user_info(data19 *req, const char *pRequest) {
    char              logBuff[512];
    const char       *pStrContent;
    dhcpMap::iterator p;

    dzlog_debug("Input: %s\n", pRequest);

    if (pRequest == nullptr || strlen(pRequest) == 0) {
        sprintf(logBuff, "Requeset Json");
        logDHCPMess(logBuff, 1);
        return ERR_INPUT_PARAMS;
    }

    pStrContent = proto_decode_context(pRequest, nullptr, nullptr);

    if (pStrContent == nullptr) {
        sprintf(logBuff, "Requeset Json error %s", pRequest);
        logDHCPMess(logBuff, 1);
        return ERR_PROTO_DECODE;
    }

    cJSON *pRoot = cJSON_Parse(pStrContent);
    free((void *)pStrContent);

    if (!pRoot) {
        return ERR_JSON_PRASE_OBJ;
    }

    cJSON *pUserMac = cJSON_GetObjectItem(pRoot, "userMac");

    if (!pUserMac) {
        cJSON_Delete(pRoot);
        return ERR_JSON_PRASE_OBJ;
    }

    req->memSize = (int)(2048 + (135 * dhcpCache.size()) + (cfig.dhcpSize * 26));
    req->dp      = (char *)calloc(1, req->memSize);

    if (!req->dp) {
        sprintf(logBuff, "Memory Error");
        logDHCPMess(logBuff, 1);
        return ERR_JSON_PRASE_OBJ;
    }

    //    cJSON *pRspRoot = cJSON_CreateObject();
    //    cJSON_AddNumberToObject(pRspRoot, "version", 3);
    //    cJSON_AddNumberToObject(pRspRoot, "cryptoType", 0);
    //    cJSON_AddNumberToObject(pRspRoot, "timeStamp", (unsigned int)time(nullptr));

    cJSON *pRspMsg   = cJSON_CreateObject();
    cJSON *pMsgArray = cJSON_CreateArray();

    cJSON_AddItemToObject(pRspMsg, "userInfo", pMsgArray);

    for (int i = 0; i < cJSON_GetArraySize(pUserMac); i++) {
        char   tempbuff[512];
        cJSON *pItem    = cJSON_GetArrayItem(pUserMac, i);
        cJSON *pRspItem = cJSON_CreateObject();

        p = dhcpCache.find(pItem->valuestring);
        cJSON_AddStringToObject(pRspItem, "userMac", pItem->valuestring);

        if (p != dhcpCache.end()) {
            data7 *dhcpEntry = p->second;

            cJSON_AddStringToObject(pRspItem, "ip", IP2String(tempbuff, dhcpEntry->ip));
            cJSON_AddStringToObject(pRspItem, "hostname", dhcpEntry->hostname);
            if (dhcpEntry->display && dhcpEntry->expiry >= t) {
                tm *ttm = localtime(&dhcpEntry->expiry);
                strftime(tempbuff, sizeof(tempbuff), "%d-%b-%y %X", ttm);
                cJSON_AddStringToObject(pRspItem, "leaseExpiry", tempbuff);
            } else {
                cJSON_AddStringToObject(pRspItem, "leaseExpiry", "Expiry");
            }
        } else {
            cJSON_AddStringToObject(pRspItem, "ip", "");
            cJSON_AddStringToObject(pRspItem, "hostname", "");
        }

        cJSON_AddItemToArray(pMsgArray, pRspItem);
    }

    cJSON_AddNumberToObject(pRspMsg, "status", ERR_SUCCESS);
    cJSON_AddStringToObject(pRspMsg, "message", getErrorEnumDesc(ERR_SUCCESS));

    const char *pStrPro = proto_create_new(pRspMsg, 200);

    //cJSON_AddItemToObject(pRspRoot, "msgContent", pRspMsg);

    char *fp = req->dp;
    //char *maxData = req->dp + (req->memSize - 512);

    //fp += sprintf(fp, send200, strlen(rspBuf));
    fp += sprintf(fp, "%s", pStrPro);
    req->bytes = (int)(fp - req->dp);

    cJSON_Delete(pRoot);
    free((void *)pStrPro);

    return ERR_SUCCESS;
}

static int dhcp_get_all_user(data19 *req) {
    char              logBuff[512];
    data7            *dhcpEntry;
    dhcpMap::iterator p;

    req->memSize = (int)(2048 + (135 * dhcpCache.size()) + (cfig.dhcpSize * 26));
    req->dp      = (char *)calloc(1, req->memSize);

    if (!req->dp) {
        sprintf(logBuff, "Memory Error");
        logDHCPMess(logBuff, 1);
        return ERR_MALLOC_MEMORY;
    }

    char *fp      = req->dp;
    char *maxData = req->dp + (req->memSize - 512);

    cJSON *pRspMsg   = cJSON_CreateObject();
    cJSON *pMsgArray = cJSON_CreateArray();

    cJSON_AddItemToObject(pRspMsg, "users", pMsgArray);

    for (p = dhcpCache.begin(); kRunning && p != dhcpCache.end() && fp < maxData; p++) {
        //cJSON *pRspItem = cJSON_CreateObject();
        if ((dhcpEntry = p->second)) {
            cJSON_AddStringToObject(pMsgArray, "", dhcpEntry->mapname);
        }

        //cJSON_AddItemToArray(pMsgArray, pRspItem);
    }

    //cJSON_AddItemToObject(pRspRoot, "msgContent", pRspMsg);
    cJSON_AddNumberToObject(pRspMsg, "status", ERR_SUCCESS);
    cJSON_AddStringToObject(pRspMsg, "message", getErrorEnumDesc(ERR_SUCCESS));

    const char *pStrPro = proto_create_new(pRspMsg, 200);

    fp += sprintf(fp, "%s", pStrPro);
    req->bytes = (int)(fp - req->dp);

    free((void *)pStrPro);

    return ERR_SUCCESS;
}

#define VALUE_TO_DHCP_TLV(buf, val, tag)                      \
    do {                                                      \
        int valSize;                                          \
        int numbytes = myTokenize((buf), (val), "/,.", true); \
        if (numbytes <= 255) {                                \
            char *ptr = (buf);                                \
            valSize   = 0;                                    \
            for (; *ptr; ptr = myGetToken(ptr, 1)) {          \
                if (isInt(ptr)) {                             \
                    hoption[valSize] = STR2INT(ptr);          \
                    valSize++;                                \
                } else {                                      \
                    break;                                    \
                }                                             \
            }                                                 \
            memcpy((val), hoption, valSize);                  \
            if (buffSize > valSize + 2) {                     \
                *dp = (tag);                                  \
                dp++;                                         \
                *dp = valSize;                                \
                dp++;                                         \
                memcpy(dp, (val), valSize);                   \
                dp += valSize;                                \
                buffSize -= (valSize + 2);                    \
            }                                                 \
        }                                                     \
    } while (0)

static int dhcp_add_rangeset_to_options(POBJ_DHCP_RNG pRange) {
    int     ret;
    char    buff[1024];
    MYBYTE  hoption[256];
    MYBYTE *dp;
    MYWORD  buffSize   = sizeof(dhcp_packet) - sizeof(dhcp_header);
    char    value[256] = {0};
    MYBYTE *options    = nullptr;
    data20  optionData {};

    if (!pRange) {
        return -ERR_INPUT_PARAMS;
    }

    memset(&optionData, 0, sizeof(data20));

    optionData.rangeSetInd                = cfig.rangeCount;
    cfig.rangeSet[cfig.rangeCount].active = true;

    dp  = optionData.options;
    *dp = 0;
    dp++;

    //dhcp_range
    ret = addDHCPRange(pRange->rangAddr);
    if (ret != ERR_SUCCESS) {
        return ret;
    }

    if (strlen(pRange->subnet) != 0) {
        strcpy(value, pRange->subnet);
        VALUE_TO_DHCP_TLV(buff, value, DHCP_OPTION_NETMASK);
        optionData.mask = (*((MYDWORD *)value));
    }

    if (strlen(pRange->dnsSvr) != 0) {
        strcpy(value, pRange->dnsSvr);
        VALUE_TO_DHCP_TLV(buff, value, DHCP_OPTION_DNS);
    }

    if (strlen(pRange->gateway) != 0) {
        strcpy(value, pRange->gateway);
        VALUE_TO_DHCP_TLV(buff, value, DHCP_OPTION_ROUTER);
    }

    //lease
    if (pRange->lease != 0) {
        MYDWORD j;
        j = pRange->lease;
        if (buffSize > 6) {
            *dp = DHCP_OPTION_IPADDRLEASE;
            dp++;
            *dp = 4;
            dp++;
            dp += pUInt(dp, j);
        }
    }

    *dp = DHCP_OPTION_END;
    dp++;
    optionData.optionSize = (dp - optionData.options);

    if (optionData.optionSize > 3) {
        options = (MYBYTE *)calloc(1, optionData.optionSize);
        memcpy(options, optionData.options, optionData.optionSize);
    }

    cfig.dhcpRanges[cfig.rangeCount].rangeSetInd = optionData.rangeSetInd;
    cfig.dhcpRanges[cfig.rangeCount].options     = options;
    cfig.dhcpRanges[cfig.rangeCount].mask        = optionData.mask;
    if (!cfig.dhcpRanges[cfig.rangeCount].mask) {
        cfig.dhcpRanges[cfig.rangeCount].mask = cfig.mask;
    }
    cfig.rangeCount = (char)(cfig.rangeCount + 1);

    return ERR_SUCCESS;
}

static int add_dhcpd_rangeset(data19 *req, const char *pRequest) {
    char         logBuff[512];
    const char  *pStrContent;
    OBJ_DHCP_RNG range;
    char        *fp;
    cJSON       *pRspRoot;
    cJSON       *pExpandArray;

    dzlog_debug("Input: %s\n", pRequest);

    if (pRequest == nullptr || strlen(pRequest) == 0) {
        sprintf(logBuff, "Requeset Json");
        logDHCPMess(logBuff, 1);
        return ERR_INPUT_PARAMS;
    }

    pStrContent = proto_decode_context(pRequest, nullptr, nullptr);

    if (pStrContent == nullptr) {
        sprintf(logBuff, "Requeset Json error %s", pRequest);
        logDHCPMess(logBuff, 1);
        return ERR_PROTO_DECODE;
    }

    cJSON *pRoot = cJSON_Parse(pStrContent);
    free((void *)pStrContent);

    if (!pRoot) {
        return ERR_JSON_PRASE_OBJ;
    }

    cJSON *prange_set = cJSON_GetObjectItem(pRoot, "rangeSet");

    req->memSize = (int)(2048 + (135 * dhcpCache.size()) + (cfig.dhcpSize * 26));
    req->dp      = (char *)calloc(1, req->memSize);

    if (!req->dp) {
        sprintf(logBuff, "Memory Error");
        logDHCPMess(logBuff, 1);
        cJSON_Delete(pRoot);
        return ERR_MALLOC_MEMORY;
    }

    fp           = req->dp;
    pRspRoot     = cJSON_CreateObject();
    pExpandArray = cJSON_CreateArray();
    cJSON_AddItemToObject(pRspRoot, "rangeSet", pExpandArray);

    for (int i = 0; i < cJSON_GetArraySize(prange_set); i++) {
        int    ret;
        cJSON *pItem       = cJSON_GetArrayItem(prange_set, i);
        cJSON *pdhcp_range = cJSON_GetObjectItem(pItem, "dhcpRange");
        cJSON *pEx_range   = cJSON_CreateObject();

        if (!pdhcp_range) {
            continue;
        }

        cJSON_AddStringToObject(pEx_range, "dhcpRange", pdhcp_range->valuestring);

        cJSON *psubnet_mask   = cJSON_GetObjectItem(pItem, "netmask");
        cJSON *pdomain_server = cJSON_GetObjectItem(pItem, "domainServer");
        cJSON *pgateway       = cJSON_GetObjectItem(pItem, "gateway");
        cJSON *please_time    = cJSON_GetObjectItem(pItem, "leaseTime");

        memset(&range, 0, sizeof(OBJ_DHCP_RNG));

        strcpy(range.rangAddr, pdhcp_range->valuestring);
        if (psubnet_mask) {
            strcpy(range.subnet, psubnet_mask->valuestring);
        }

        if (pdomain_server) {
            strcpy(range.dnsSvr, pdomain_server->valuestring);
        }

        if (pgateway) {
            strcpy(range.gateway, pgateway->valuestring);
        }

        if (please_time) {
            range.lease = please_time->valueint;
        }

        //写入cfig
        ret = dhcp_add_rangeset_to_options(&range);
        if (ret != ERR_SUCCESS) {
            cJSON_AddNumberToObject(pEx_range, "status", ret);
            cJSON_AddStringToObject(pEx_range, "message", getErrorEnumDesc(ret));
            cJSON_AddItemToArray(pExpandArray, pEx_range);
            break;
        }

        cJSON_AddNumberToObject(pEx_range, "status", ERR_SUCCESS);
        cJSON_AddStringToObject(pEx_range, "message", getErrorEnumDesc(ERR_SUCCESS));
        cJSON_AddItemToArray(pExpandArray, pEx_range);
    }

    const char *pStrPro = proto_create_new(pRspRoot, 200);

    fp += sprintf(fp, "%s", pStrPro);

    cJSON_Delete(pRoot);

    req->bytes = (int)(fp - req->dp);
    free((void *)pStrPro);

    return ERR_SUCCESS;
}

static int delete_dhcpd_rangeset(data19 *req, const char *pRequest) {
    char        logBuff[512];
    const char *pStrContent;
    char       *fp;
    cJSON      *pRspRoot;
    cJSON      *pdelArray;

    dzlog_debug("Input: %s\n", pRequest);

    if (pRequest == nullptr || strlen(pRequest) == 0) {
        sprintf(logBuff, "Requeset Json");
        logDHCPMess(logBuff, 1);
        return ERR_INPUT_PARAMS;
    }

    pStrContent = proto_decode_context(pRequest, nullptr, nullptr);
    if (pStrContent == nullptr) {
        sprintf(logBuff, "Requeset Json error %s", pRequest);
        logDHCPMess(logBuff, 1);
        return ERR_PROTO_DECODE;
    }

    cJSON *pRoot = cJSON_Parse(pStrContent);
    free((void *)pStrContent);
    if (!pRoot) {
        return ERR_JSON_PRASE_OBJ;
    }

    cJSON *pdhcp_range = cJSON_GetObjectItem(pRoot, "dhcpRange");

    req->memSize = (int)(2048 + (135 * dhcpCache.size()) + (cfig.dhcpSize * 26));
    req->dp      = (char *)calloc(1, req->memSize);

    if (!req->dp) {
        sprintf(logBuff, "Memory Error");
        logDHCPMess(logBuff, 1);
        cJSON_Delete(pRoot);
        return ERR_MALLOC_MEMORY;
    }

    fp        = req->dp;
    pRspRoot  = cJSON_CreateObject();
    pdelArray = cJSON_CreateArray();
    cJSON_AddItemToObject(pRspRoot, "rangeSet", pdelArray);

    for (int i = 0; i < cJSON_GetArraySize(pdhcp_range); i++) {
        cJSON *pdelRange = cJSON_GetArrayItem(pdhcp_range, i);
        cJSON *pdel_Item = cJSON_CreateObject();
        char   del_range[256];
        bool   deleted_flag = false;

        if (!pdelRange) {
            continue;
        }

        strcpy(del_range, pdelRange->valuestring);

        MYDWORD st_addr;
        MYDWORD en_addr;
        char    start[128];
        char    end[128];
        mySplit(start, end, del_range, '-');
        st_addr = htonl(inet_addr(start));
        en_addr = htonl(inet_addr(end));

        cJSON_AddStringToObject(pdel_Item, "dhcpRange", pdelRange->valuestring);
        if (st_addr && en_addr && st_addr <= en_addr) {
            MYBYTE m = 0;

            for (; m < cfig.rangeCount && cfig.dhcpRanges[m].rangeStart; m++) {
                if (!deleted_flag) {
                    if ((st_addr == cfig.dhcpRanges[m].rangeStart) && (en_addr == cfig.dhcpRanges[m].rangeEnd)) {
                        deleted_flag = true;
                        if (m == cfig.rangeCount - 1) {
                            memset(&cfig.dhcpRanges[m], 0, sizeof(struct data19));
                        }
                        continue;
                    } else if (st_addr == cfig.dhcpRanges[m].rangeStart || en_addr == cfig.dhcpRanges[m].rangeEnd) {
                        deleted_flag = false;
                        break;
                    }
                } else {
                    memcpy(&(cfig.dhcpRanges[m - 1]), &(cfig.dhcpRanges[m]), sizeof(struct data19));
                }
            }
        } else {
            cJSON_AddNumberToObject(pdel_Item, "status", ERR_INPUT_PARAMS);
            cJSON_AddStringToObject(pdel_Item, "message", getErrorEnumDesc(ERR_INPUT_PARAMS));
            cJSON_AddItemToArray(pdelArray, pdel_Item);
            break;
        }

        if (deleted_flag) {
            cfig.rangeCount--;
        } else {
            cJSON_AddNumberToObject(pdel_Item, "status", ERR_INPUT_PARAMS);
            cJSON_AddStringToObject(pdel_Item, "message", getErrorEnumDesc(ERR_INPUT_PARAMS));
            cJSON_AddItemToArray(pdelArray, pdel_Item);
            break;
        }

        cJSON_AddNumberToObject(pdel_Item, "status", ERR_SUCCESS);
        cJSON_AddStringToObject(pdel_Item, "message", getErrorEnumDesc(ERR_SUCCESS));
        cJSON_AddItemToArray(pdelArray, pdel_Item);
    }

    const char *pStrPro = proto_create_new(pRspRoot, 200);
    fp += sprintf(fp, "%s", pStrPro);

    cJSON_Delete(pRoot);
    req->bytes = (int)(fp - req->dp);
    free((void *)pStrPro);

    return ERR_SUCCESS;
}

#pragma clang diagnostic push
#pragma ide diagnostic   ignored "cert-err34-c"
int                      getHwAddr(char *buff, char *mac) {
    if (buff == nullptr || mac == nullptr) {
        return -1;
    }

    int          i;
    unsigned int p[6];

    if (sscanf(mac, "%x:%x:%x:%x:%x:%x", &p[0], &p[1], &p[2], &p[3], &p[4], &p[5]) < 6) {
        return -1;
    }

    for (i = 0; i < 6; i++) {
        buff[i] = (char)p[i];
    }

    return 0;
}
#pragma clang diagnostic pop

int arpSet(const char *ifname, char *ipStr, char *mac) {
    if (ifname == nullptr || ipStr == nullptr || mac == nullptr) {
        dzlog_error("para is null.\n");
        return -1;
    }

    struct arpreq       req {};
    struct sockaddr_in *sin;
    int                 ret;
    int                 sock_fd;

    memset(&req, 0, sizeof(struct arpreq));
    sin                  = (struct sockaddr_in *)&req.arp_pa;
    sin->sin_family      = AF_INET;
    sin->sin_addr.s_addr = inet_addr(ipStr);
    //arp_dev长度为[16]，注意越界
    strncpy(req.arp_dev, ifname, 15);
    req.arp_flags = ATF_PERM | ATF_COM;

    if (getHwAddr((char *)req.arp_ha.sa_data, mac) < 0) {
        dzlog_error("get mac error.\n");
        return -1;
    }

    sock_fd = socket(AF_INET, SOCK_DGRAM, 0);
    if (sock_fd < 0) {
        dzlog_error("get socket error.\n");
        return -1;
    }

    ret = ioctl(sock_fd, SIOCSARP, &req);
    if (ret < 0) {
        dzlog_error("ioctl error.\n");
        close(sock_fd);
        return -1;
    }

    close(sock_fd);
    return 0;
}

sockaddr_in get_cliAddr(char *nicif, char *tempbuff, data9 *req) {
    arpSet(nicif, IP2String(tempbuff, req->dhcpp.header.bp_yiaddr), req->chaddr);

    sockaddr_in cliAddr {};
    memcpy(&cliAddr, &req->remote, sizeof(sockaddr_in));
    cliAddr.sin_addr.s_addr = inet_addr(IP2String(tempbuff, req->dhcpp.header.bp_yiaddr));
    return cliAddr;
}

static void response_complete(void *user_data) {
    auto *req = (data19 *)user_data;
    if (req) {

        if (req->dp) {
            free(req->dp);
        }

        free(req);
    }
}

static void proto_response_error(hw_http_response *response, int httpCode, const char *httpCodeStr, int errCode) {
    cJSON *pRspMsg = cJSON_CreateObject();

    cJSON_AddNumberToObject(pRspMsg, "status", errCode);
    cJSON_AddStringToObject(pRspMsg, "message", getErrorEnumDesc(errCode));

    const char *pStrPro = proto_create_new(pRspMsg, httpCode);

    hw_http_response_send_error(response, httpCodeStr, pStrPro);
    free((void *)pStrPro);
}

static void opendhcp_http_info(http_request *request, hw_http_response *response, void *UNUSED(user_data)) {
    hw_string status_code;
    hw_string content_type_name;
    hw_string content_type_value;
    hw_string body;
    hw_string keep_alive_name;
    hw_string keep_alive_value;

    auto *req = (data19 *)malloc(sizeof(struct data19));

    if (req == nullptr) {
        proto_response_error(response, 500, HTTP_STATUS_500, ERR_MALLOC_MEMORY);
        return;
    }

    if (request->method != HW_HTTP_GET) {
        proto_response_error(response, 405, HTTP_STATUS_405, ERR_HTTP_UNSUP_METHOD);
        return;
    }

    memset(req, 0, sizeof(struct data19));

    SETSTRING(content_type_name, "Content-Type");
    SETSTRING(content_type_value, "text/html");
    hw_set_response_header(response, &content_type_name, &content_type_value);

    SETSTRING(status_code, HTTP_STATUS_200);
    prepareUserHtmlRespStatus(req);
    SETSTRING(body, req->dp);
    hw_set_body(response, &body);
    hw_set_response_status_code(response, &status_code);

    if (request->keep_alive) {
        SETSTRING(keep_alive_name, "Connection");
        SETSTRING(keep_alive_value, "close");
        hw_set_response_header(response, &keep_alive_name, &keep_alive_value);
    } else {
        hw_set_http_version(response, 1, 0);
    }

    hw_http_response_send(response, req, response_complete);
}

static void opendhcp_http_get_userinfo(http_request *request, hw_http_response *response, void *UNUSED(user_data)) {
    hw_string status_code;
    hw_string content_type_name;
    hw_string content_type_value;
    hw_string body;
    hw_string keep_alive_name;
    hw_string keep_alive_value;
    int       ret;

    auto *req = (data19 *)malloc(sizeof(struct data19));

    if (req == nullptr) {
        proto_response_error(response, 500, HTTP_STATUS_500, ERR_MALLOC_MEMORY);
        return;
    }

    if (request->method != HW_HTTP_POST) {
        proto_response_error(response, 405, HTTP_STATUS_405, ERR_HTTP_UNSUP_METHOD);
        return;
    }

    memset(req, 0, sizeof(struct data19));

    SETSTRING(content_type_name, "Content-Type");
    SETSTRING(content_type_value, "application/json");
    hw_set_response_header(response, &content_type_name, &content_type_value);

    SETSTRING(status_code, HTTP_STATUS_200);
    ret = dhcp_get_user_info(req, request->body->value);
    if (ret != ERR_SUCCESS) {
        proto_response_error(response, 500, HTTP_STATUS_500, ret);
        return;
    }
    SETSTRING(body, req->dp);
    hw_set_body(response, &body);
    hw_set_response_status_code(response, &status_code);

    if (request->keep_alive) {
        SETSTRING(keep_alive_name, "Connection");
        SETSTRING(keep_alive_value, "close");
        hw_set_response_header(response, &keep_alive_name, &keep_alive_value);
    } else {
        hw_set_http_version(response, 1, 0);
    }

    hw_http_response_send(response, req, response_complete);
}

static void opendhcp_http_get_alluser(http_request *request, hw_http_response *response, void *UNUSED(user_data)) {
    hw_string status_code;
    hw_string content_type_name;
    hw_string content_type_value;
    hw_string body;
    hw_string keep_alive_name;
    hw_string keep_alive_value;
    int       ret;

    auto *req = (data19 *)malloc(sizeof(struct data19));

    if (req == nullptr) {
        proto_response_error(response, 500, HTTP_STATUS_500, ERR_MALLOC_MEMORY);
        return;
    }

    if (request->method != HW_HTTP_GET) {
        proto_response_error(response, 405, HTTP_STATUS_405, ERR_HTTP_UNSUP_METHOD);
        return;
    }

    memset(req, 0, sizeof(struct data19));

    SETSTRING(content_type_name, "Content-Type");
    SETSTRING(content_type_value, "application/json");
    hw_set_response_header(response, &content_type_name, &content_type_value);

    SETSTRING(status_code, HTTP_STATUS_200);
    ret = dhcp_get_all_user(req);
    if (ret != ERR_SUCCESS) {
        proto_response_error(response, 500, HTTP_STATUS_500, ret);
        return;
    }
    SETSTRING(body, req->dp);
    hw_set_body(response, &body);
    hw_set_response_status_code(response, &status_code);

    if (request->keep_alive) {
        SETSTRING(keep_alive_name, "Connection");
        SETSTRING(keep_alive_value, "close");
        hw_set_response_header(response, &keep_alive_name, &keep_alive_value);
    } else {
        hw_set_http_version(response, 1, 0);
    }

    hw_http_response_send(response, req, response_complete);
}

static void opendhcp_http_add_rangeset(http_request *request, hw_http_response *response, void *UNUSED(user_data)) {
    hw_string status_code;
    hw_string content_type_name;
    hw_string content_type_value;
    hw_string body;
    hw_string keep_alive_name;
    hw_string keep_alive_value;
    int       ret;

    auto *req = (data19 *)malloc(sizeof(struct data19));

    if (req == nullptr) {
        hw_http_response_send_error(response, HTTP_STATUS_500, "memory error");
        return;
    }

    if (request->method != HW_HTTP_POST) {
        hw_http_response_send_error(response, HTTP_STATUS_405, HTTP_STATUS_405);
        return;
    }

    memset(req, 0, sizeof(struct data19));
    SETSTRING(content_type_name, "Content-Type");
    SETSTRING(content_type_value, "application/json");
    hw_set_response_header(response, &content_type_name, &content_type_value);

    SETSTRING(status_code, HTTP_STATUS_200);
    ret = add_dhcpd_rangeset(req, request->body->value);
    if (ret != ERR_SUCCESS) {
        proto_response_error(response, 500, HTTP_STATUS_500, ret);
        return;
    }

    SETSTRING(body, req->dp);
    hw_set_body(response, &body);
    hw_set_response_status_code(response, &status_code);

    if (request->keep_alive) {
        SETSTRING(keep_alive_name, "Connection");
        SETSTRING(keep_alive_value, "close");
        hw_set_response_header(response, &keep_alive_name, &keep_alive_value);
    } else {
        hw_set_http_version(response, 1, 0);
    }

    hw_http_response_send(response, req, response_complete);
}

static void opendhcp_http_delete_rangeset(http_request *request, hw_http_response *response, void *UNUSED(user_data)) {
    hw_string status_code;
    hw_string content_type_name;
    hw_string content_type_value;
    hw_string body;
    hw_string keep_alive_name;
    hw_string keep_alive_value;
    int       ret;

    auto *req = (data19 *)malloc(sizeof(struct data19));

    if (req == nullptr) {
        hw_http_response_send_error(response, HTTP_STATUS_500, "memory error");
        return;
    }

    if (request->method != HW_HTTP_POST) {
        hw_http_response_send_error(response, HTTP_STATUS_405, HTTP_STATUS_405);
        return;
    }

    memset(req, 0, sizeof(struct data19));
    SETSTRING(content_type_name, "Content-Type");
    SETSTRING(content_type_value, "application/json");
    hw_set_response_header(response, &content_type_name, &content_type_value);

    SETSTRING(status_code, HTTP_STATUS_200);
    ret = delete_dhcpd_rangeset(req, request->body->value);
    if (ret != ERR_SUCCESS) {
        proto_response_error(response, 500, HTTP_STATUS_500, ret);
        return;
    }

    SETSTRING(body, req->dp);
    hw_set_body(response, &body);
    hw_set_response_status_code(response, &status_code);

    if (request->keep_alive) {
        SETSTRING(keep_alive_name, "Connection");
        SETSTRING(keep_alive_value, "close");
        hw_set_response_header(response, &keep_alive_name, &keep_alive_value);
    } else {
        hw_set_http_version(response, 1, 0);
    }

    hw_http_response_send(response, req, response_complete);
}

/**
 * 添加配置文件监听接口
 * @return
 */
int opendhcp_add_listener() {
    int    i;
    vector listen_ip = config_get_dhcp_listen_on();

    for (i = 0; listen_ip && i < vect_size(listen_ip); i++) {
        const char *pIp = (const char *)vect_get_at(listen_ip, i);
        if (pIp && strlen(pIp) > 0) {
            MYDWORD addr = inet_addr(pIp);
            addServer(cfig.specifiedServers, MAX_SERVERS, addr);
        }
    }

    return i;
}

/**
 * 增加 DHCP Server HTTP服务接口
 */
void opendhcp_init_http_server() {
    static int added = FALSE;

    if (!added) {
        hw_http_add_route("/", opendhcp_http_info, nullptr);
        hw_http_add_route("dhcp/info/getuser", opendhcp_http_get_userinfo, nullptr);
        hw_http_add_route("dhcp/info/allusers", opendhcp_http_get_alluser, nullptr);
        hw_http_add_route("dhcp/config/rangeset", opendhcp_http_add_rangeset, nullptr);
        hw_http_add_route("dhcp/delete/rangeset", opendhcp_http_delete_rangeset, nullptr);
        added = TRUE;
    }
}

/**
 * 增加 DHCP 主、从服务器配置
 */
void opendhcp_set_replication_svr() {
    vector replication = config_get_dhcp_replication_svr();

    if (replication && vect_size(replication) == 2) {
        cfig.zoneServers[0] = inet_addr((const char *)vect_get_at(replication, 0));
        cfig.zoneServers[1] = inet_addr((const char *)vect_get_at(replication, 1));
    }
}

/**
 *  添加配置文件中的 DHCP 地址池池配置到服务中
 */
void opendhcp_add_ip_pool_set() {
    vector pool = config_get_dhcp_server_range_set();

    for (int i = 0; (pool && i < vect_size(pool)); i++) {
        auto pRange = (POBJ_DHCP_RNG)vect_get_at(pool, i);

        if (pRange) {
            if (dhcp_add_rangeset_to_options(pRange) != ERR_SUCCESS) {
                dzlog_error("Add rangeset(\"%s\") failed!", pRange->rangAddr);
            }
        }
    }
}