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在w5500基础库中进行封装#xff0c;通过域名的方式获取实际的ip地址用于动态获取ntp的ip地址
DNS封装
头文件
/*******************************************************************************Copyright (c) [scl]。保留所有权利。****************************…概述
在w5500基础库中进行封装通过域名的方式获取实际的ip地址用于动态获取ntp的ip地址
DNS封装
头文件
/*******************************************************************************Copyright (c) [scl]。保留所有权利。******************************************************************************/
#ifndef F1XX_TEMPLATE_W5500_DNS_H
#define F1XX_TEMPLATE_W5500_DNS_H#include socket.h#define TYPE_A 1 /* Host address */
#define TYPE_NS 2 /* Name server */
#define TYPE_MD 3 /* Mail destination (obsolete) */
#define TYPE_MF 4 /* Mail forwarder (obsolete) */
#define TYPE_CNAME 5 /* Canonical name */
#define TYPE_SOA 6 /* Start of Authority */
#define TYPE_MB 7 /* Mailbox name (experimental) */
#define TYPE_MG 8 /* Mail group member (experimental) */
#define TYPE_MR 9 /* Mail rename name (experimental) */
#define TYPE_NULL 10 /* Null (experimental) */
#define TYPE_WKS 11 /* Well-known sockets */
#define TYPE_PTR 12 /* Pointer record */
#define TYPE_HINFO 13 /* Host information */
#define TYPE_MINFO 14 /* Mailbox information (experimental)*/
#define TYPE_MX 15 /* Mail exchanger */
#define TYPE_TXT 16 /* Text strings */
#define TYPE_ANY 255 /* Matches any type */
#define MAX_DNS_BUF_SIZE 256 /* maximum size of DNS buffer. *//*** memberof delay_ms_cb 毫秒延迟回调* memberof dns_server_ip: dns 服务ip* memberof dns_port: dns 端口,默认53*/
struct dns_conf {void (*delay_ms_cb)(uint32_t ms);uint8_t dns_server_ip[4];uint16_t dns_port;
};void dns_config_set(struct dns_conf *cnf);
/**** param s socket num* param domain_name 服务域名* param dst_ip [out] 保存解析的数据* param wait_ms [in] 发送请求后等待时间* return*/
bool do_dns(SOCKET s, uint8_t *domain_name, uint8_t *dst_ip, uint32_t wait_ms);#endif //F1XX_TEMPLATE_W5500_DNS_H
源文件
/*******************************************************************************Copyright (c) [scl]。保留所有权利。******************************************************************************/
#include w5500_dns.h#define DBG_ENABLE
#define DBG_SECTION_NAME dns
#define DBG_LEVEL DBG_INFO // DBG_LOG DBG_INFO DBG_WARNING DBG_ERROR#include sys_dbg.h/* Header for all domain messages */
struct dhdr {uint16_t id; /* Identification */uint8_t qr; /* Query/Response */uint8_t opcode;uint8_t aa; /* Authoratative answer */uint8_t tc; /* Truncation */uint8_t rd; /* Recursion desired */uint8_t ra; /* Recursion available */uint8_t rcode; /* Response code */uint16_t qdcount; /* Question count */uint16_t ancount; /* Answer count */uint16_t nscount; /* Authority (name server) count */uint16_t arcount; /* Additional record count */
};static uint8_t DNS_BUF[MAX_DNS_BUF_SIZE] {0};
static struct dhdr dhp {0}; /*定义一个结构体用来包含报文头信息*/
static uint16_t MSG_ID 0x1122;
struct dns_conf *cnf_ptr NULL;static int dns_packet_build(uint16_t op, uint8_t *name, uint8_t *buf, uint16_t len);static bool parse_DNS_Response(struct dhdr *pdhdr, uint8_t *pbuf, uint8_t *dst_result_ip);static uint8_t *dns_question(uint8_t *msg, uint8_t *cp);static uint8_t *dns_answer(uint8_t *msg, uint8_t *cp, uint8_t *dst_result_ip);static int16_t parse_name(uint8_t *msg, uint8_t *compressed, uint16_t len);void dns_config_set(struct dns_conf *cnf) {cnf_ptr cnf;
}/*** dns 解析* param s* param domain_name 域名* return*/
bool do_dns(SOCKET s, uint8_t *domain_name, uint8_t *dst_ip, uint32_t wait_ms) {if (cnf_ptr NULL) {LOG_E(dns_config_set not set);goto _exit_false;}if (udp_client_init(s, cnf_ptr-dns_port)) {uint16_t len dns_packet_build(0, domain_name, DNS_BUF, MAX_DNS_BUF_SIZE);sendto(s, DNS_BUF, len, cnf_ptr-dns_server_ip, cnf_ptr-dns_port); /*发送DNS请求报文给DNS服务器*/for (int i 0; i wait_ms / 2; i) {len w5500_socket_rx_size_read(s);if (len 0) break;cnf_ptr-delay_ms_cb(2);}if (len 0) {if (len MAX_DNS_BUF_SIZE) len MAX_DNS_BUF_SIZE;recvfrom_simple(s, DNS_BUF, len);if (parse_DNS_Response(dhp, DNS_BUF, dst_ip)) {close(s);/*关闭socket*/return true;/*返回DNS解析成功域名信息*/} else {LOG_W(parse_DNS_Response err);}} else {LOG_D(w5500_socket_rx_size_read not rec data);}} else {LOG_W(udp_client_init error);}_exit_false:return false;
}static int dns_packet_build(uint16_t op, uint8_t *name, uint8_t *buf, uint16_t len) {uint8_t *cp buf;uint8_t *cp1;uint8_t *dname;uint16_t p;uint16_t dlen;MSG_ID;*(uint16_t *) cp[0] htons(MSG_ID);p (op 11) | 0x0100;*(uint16_t *) cp[2] htons(p);*(uint16_t *) cp[4] htons(1);*(uint16_t *) cp[6] htons(0);*(uint16_t *) cp[8] htons(0);*(uint16_t *) cp[10] htons(0);cp sizeof(uint16_t) * 6;dname name;dlen strlen((char *) dname);for (;;) {/* Look for next dot */cp1 (unsigned char *) strchr((char *) dname, .);if (cp1) {/* More to come */len cp1 - dname;} else {len dlen; /* Last component */}*cp len; /* Write length of component */if (len 0) break;strncpy((char *) cp, (char *) dname, len);/* Copy component up to (but not including) dot */cp len;if (!cp1) {*cp 0; /* Last one; write null and finish */break;}dname len 1;dlen - len 1;}*(uint16_t *) cp[0] htons(0x0001); /* type */*(uint16_t *) cp[2] htons(0x0001); /* class */cp sizeof(uint16_t) * 2;return ((int) ((uint32_t) (cp) - (uint32_t) (buf)));}static bool parse_DNS_Response(struct dhdr *pdhdr, uint8_t *pbuf, uint8_t *dst_result_ip) {uint16_t tmp 0, i 0;uint8_t *msg NULL, *cp NULL;msg pbuf;memset(pdhdr, 0, sizeof(struct dhdr));pdhdr-id ntohs(*((uint16_t *) msg[0]));tmp ntohs(*((uint16_t *) msg[2]));if (tmp 0x8000)pdhdr-qr 1;pdhdr-opcode (tmp 11) 0xf;if (tmp 0x0400)pdhdr-aa 1;if (tmp 0x0200)pdhdr-tc 1;if (tmp 0x0100)pdhdr-rd 1;if (tmp 0x0080)pdhdr-ra 1;pdhdr-rcode tmp 0xf;pdhdr-qdcount ntohs(*((uint16_t *) msg[4]));pdhdr-ancount ntohs(*((uint16_t *) msg[6]));pdhdr-nscount ntohs(*((uint16_t *) msg[8]));pdhdr-arcount ntohs(*((uint16_t *) msg[10]));/* Now parse the variable length sections */cp msg[12];/* Question section */for (i 0; i pdhdr-qdcount; i) {cp dns_question(msg, cp);}/* Answer section */for (i 0; i pdhdr-ancount; i) {cp dns_answer(msg, cp, dst_result_ip);}/* Name server (authority) section */for (i 0; i pdhdr-nscount; i) { ;}/* Additional section */for (i 0; i pdhdr-arcount; i) { ;}if (pdhdr-rcode 0)return 1;elsereturn 0;
}/**
*brief 解析回复消息的问询记录
*param msg - 指向回复信息的指针cp - 指向问询记录的指针
*return 返回下一个记录指针
*/
uint8_t *dns_question(uint8_t *msg, uint8_t *cp) {int16_t len parse_name(msg, cp, MAX_DNS_BUF_SIZE);if (len -1)return 0;cp len;cp 2; /* type */cp 2; /* class */return cp;
}static uint8_t *dns_answer(uint8_t *msg, uint8_t *cp, uint8_t *dst_result_ip) {int16_t len, type;len parse_name(msg, cp, /*name,*/ MAX_DNS_BUF_SIZE);if (len -1)return 0;cp len;type ntohs(*((uint16_t *) cp[0]));cp 2; /* type */cp 2; /* class */cp 4; /* ttl */cp 2; /* len */switch (type) {case TYPE_A:dst_result_ip[0] *cp;dst_result_ip[1] *cp;dst_result_ip[2] *cp;dst_result_ip[3] *cp;break;case TYPE_CNAME:case TYPE_MB:case TYPE_MG:case TYPE_MR:case TYPE_NS:case TYPE_PTR:/* These types all consist of a single domain name *//* convert it to ascii format */len parse_name(msg, cp, MAX_DNS_BUF_SIZE);if (len -1)return 0;cp len;break;case TYPE_HINFO:len *cp;cp len;len *cp;cp len;break;case TYPE_MX:cp 2;/* Get domain name of exchanger */len parse_name(msg, cp, MAX_DNS_BUF_SIZE);if (len -1)return 0;cp len;break;case TYPE_SOA:/* Get domain name of name server */len parse_name(msg, cp, MAX_DNS_BUF_SIZE);if (len -1)return 0;cp len;/* Get domain name of responsible person */len parse_name(msg, cp, MAX_DNS_BUF_SIZE);if (len -1)return 0;cp len;cp 4;cp 4;cp 4;cp 4;cp 4;break;case TYPE_TXT:/* Just stash */break;default:/* Ignore */break;}return cp;
}static int16_t parse_name(uint8_t *msg, uint8_t *compressed, uint16_t len) {static int8_t name[MAX_DNS_BUF_SIZE];uint16_t slen 0; /* Length of current segment */uint8_t *cp NULL;int16_t clen 0; /* Total length of compressed name */int16_t indirect 0; /* Set if indirection encountered */int16_t nseg 0; /* Total number of segments in name */int8_t *buf NULL;buf name;cp compressed;for (;;) {slen *cp; /* Length of this segment */if (!indirect)clen;if ((slen 0xc0) 0xc0) {if (!indirect)clen;indirect 1;/* Follow indirection */cp msg[((slen 0x3f) 8) *cp];slen *cp;}if (slen 0) /* zero length all done */break;len - slen 1;if (len 0)return -1;if (!indirect)clen slen;while (slen-- ! 0)*buf (int8_t) *cp;*buf .;nseg;}if (nseg 0) /* Root name; represent as single dot */{*buf .;len--;}*buf \0;len--;return clen; /* Length of compressed message */
}测试
配置文件
/******************************************************************************** Copyright (c) [scl]。保留所有权利。* 本文仅供个人学习和研究使用禁止用于商业用途。******************************************************************************/#include app_conf.h
#include w5500_config.h#if APP_CONFIG_W5500
#define DBG_ENABLE
#define DBG_SECTION_NAME w5500
#define DBG_LEVEL W5500_DBG_LEVEL#include sys_dbg.h
#include w5500_dns.h
#include w5500_ntp.h#define W5500_CS stm_port_define(B,12)
#define W5500_RST stm_port_define(C,7)extern struct net_date_time gb_app_time;static SPI_HandleTypeDef *w5500_spi NULL;static void send_and_rec_bytes(uint8_t *in_dat, uint8_t *out_data, uint16_t len) {while (HAL_SPI_GetState(w5500_spi) ! HAL_SPI_STATE_READY);HAL_SPI_TransmitReceive(w5500_spi, in_dat, out_data, len, 1000);while (HAL_SPI_GetState(w5500_spi) ! HAL_SPI_STATE_READY);
}static void send_only(uint8_t *in_data, uint16_t len) {HAL_SPI_Transmit(w5500_spi, in_data, len, 1000);
}static void W5500_RST_HIGH(void) { stm_pin_high(W5500_RST); }static void W5500_RST_LOW(void) { stm_pin_low(W5500_RST); }static void W5500_CS_LOW(void) { stm_pin_low(W5500_CS); }static void W5500_CS_HIGH(void) { stm_pin_high(W5500_CS); }static void W5500_Driver_MspInit(void) {stm32_pin_mode(W5500_CS, pin_mode_output); /*CS*/stm32_pin_mode(W5500_RST, pin_mode_output); /*RST*/stm_pin_low(W5500_RST);stm_pin_low(W5500_CS);/*初始化SPI外设*//*W5500 支持 SPI 模式 0 及模式 3..MOSI 和 MISO 信号无论是接收或发送均遵从从最高标志位MSB到最低标志位LSB的传输序列。*/bsp_SpiHandleInit(w5500_spi, SPI_BAUDRATEPRESCALER_2, spi_mode_3);
}module_w5500_t w5500_conf {.base_conf{.socket_num 4,.rx_size{4, 4, 4, 4},.tx_size{4, 4, 4, 4},},.net_conf{.ip{192, 168, 199, 12},.gw{192, 168, 199, 1},.sub{255, 255, 255, 0},},.driver{.cs_high W5500_CS_HIGH,.cs_low W5500_CS_LOW,.rst_high W5500_RST_HIGH,.rst_lowW5500_RST_LOW,.delay HAL_Delay,.send_and_rec_bytes send_and_rec_bytes,.send_only send_only},.api {.msp_initW5500_Driver_MspInit,}
};
uint8_t ntp_domain[] {ntp.ntsc.ac.cn}; /*ntp域名*/
static struct dns_conf net_dns_cnf { /*dns服务配置*/.dns_server_ip{114, 114, 114, 114},.dns_port 53,.delay_ms_cb HAL_Delay
};
static struct ntp_conf net_ntp_conf {
// .ntp_server{114, 118, 7, 163},.ntp_port 123,.delay_ms_cb HAL_Delay
};static void w5500_pre_init(void) {/*一般做数据加载此时系统时钟使用的是内部时钟如需要使用系统时钟的外设不在此进行初始化*/w5500_spi conv_spi_handle_ptr(handle_get_by_id(spi2_id));/*初始化资源*/module_w5500_init(w5500_conf);uint32_t uid0 HAL_GetUIDw0();uint32_t uid1 HAL_GetUIDw1();uint32_t uid2 HAL_GetUIDw2();uint8_t mac[6] {0, uid0 8, uid1, uid1 8, uid2, uid2 8};memcpy(w5500_conf.net_conf.mac, mac, sizeof(mac));}static void w5500_init(void) {w5500_conf.api.msp_init();/*初始化*/w5500_conf.net_conf_init();uint8_t ip[4];w5500_reg_ip_read(ip);LOG_D(w5500_reg_ip_read:%d.%d.%d.%d, ip[0], ip[1], ip[2], ip[3]);w5500_reg_gw_read(ip);LOG_D(w5500_reg_gw_read:%d.%d.%d.%d, ip[0], ip[1], ip[2], ip[3]);
}static void w5500_after_init(void) {uint8_t try_cnt 3;// 尝试次数SOCKET sn 1;/*使用的socket*/
#if APP_CONFIG_W5500_DNS // 启用dnsfor (int i 0; i try_cnt; i) {dns_config_set(net_dns_cnf);if (do_dns(sn, ntp_domain, net_ntp_conf.ntp_server, 500)) {LOG_D(dns parse result ip:%d.%d.%d.%d,net_ntp_conf.ntp_server[0], net_ntp_conf.ntp_server[1],net_ntp_conf.ntp_server[2], net_ntp_conf.ntp_server[3]);goto next_step; /*解析成功跳转下一步*/}}LOG_D(do dns try cnt over);return;next_step:#endif#if APP_CONFIG_W5500_NTP // 启用ntpntp_config_set(net_ntp_conf);for (int i 0; i try_cnt; i) {if (ntp_date_time_get(sn, 500, gb_app_time)) {HAL_TIM_Base_Start_IT(handle_get_by_id(tim6_id));goto exit_ok;}}LOG_W(ntp_date_time_get time out);return;exit_ok:LOG_D(NTP TIME%d-%02d-%02d %02d:%02d:%02d,gb_app_time.year, gb_app_time.month, gb_app_time.day,gb_app_time.hour, gb_app_time.min, gb_app_time.sec);
#elsereturn;
#endif
}app_init_export(w5500_net_conf, w5500_pre_init, w5500_init, w5500_after_init);
#endif
结果
