无锡网站建设公司地址网站托管服务

当前位置： 首页 > news >正文

无锡网站建设公司地址,网站托管服务,哪家做企业网站,自考本科报名入口官网OpenSSL用法示例 OpenSSL源码安装 对于ubuntu#xff0c;懒得编译源码可以直接安装 sudo apt-get install libssl–dev /usr/include/openssl/ssl.h CMakeLists中添加
link_libraries(ssl crypto) apt-get安装不需要再制定libssl.a, libcrypto.a的路径了, 就像用libc标…OpenSSL用法示例 OpenSSL源码安装 对于ubuntu懒得编译源码可以直接安装 sudo apt-get install libssl–dev /usr/include/openssl/ssl.h CMakeLists中添加   link_libraries(ssl crypto) apt-get安装不需要再制定libssl.a, libcrypto.a的路径了, 就像用libc标准库一样。源码安装要指定-L/path/to/libssl.a或者-L/path/to/libssl.so , -lssl。客户端不需要生成证书。 sale.txt GET /uploadfile/photo/20231022/37cac8bc693780b740b4e659846689cd.jpg HTTP/1.1 Accept: image/jpeg,image/avif,image/webp,image/apng,/ Accept-Encoding: gzip, deflate Accept-Language: en-US,en;q0.9,zh-CN;q0.8,zh;q0.7,ja;q0.6 Connection: keep-alive Host: img.sx2737.com Upgrade-Insecure-Requests: 1 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Safari/537.36

• main.c #include string.h /* … */ #include https.hstatic int get_host_ip(char ip[], char hostname[]) {struct ipv4head ipv4List;struct ipv4_entry n1;int count 0;/ get ip by Gateway 10.0.0.1 */bcl_dns_query(ipv4List, hostname, 10.0.0.1);while(!TAILQ_EMPTY(ipv4List)) {n1 TAILQ_FIRST(ipv4List);TAILQ_REMOVE(ipv4List, n1, entries);printf(ip%s\n, n1-data);strncpy(ip, n1-data, 16);free(n1);count 1;}return count; }int main(int argc, char argv[]) {char path_dst[256];char path_src[256];char hostname[32] {\0};char ip[16] {\0};int sockfd -1;bclerrinit();strcpy(path_src, /mnt/e/CLionProjects/arp/fap30/input/sale.txt);strcpy(path_dst, /mnt/e/CLionProjects/arp/fap30/print/sale.jpg);strcpy(hostname, img.sx2737.com); / octipus.net, www.google.co.il */get_host_ip(ip, hostname);printf(path_dst%s\n, path_dst);if (E_FAIL https_get_body(ip,path_src, path_dst)) {bclerrlog(E_SOCKFD_RECV, FL, https_get_body(%s,%s,%s),ip,path_src,path_dst);return E_FAIL;}bclerrend();return E_OK; }网关直接固定写的10.0.0.1, 需要改。或者再实现一个拿到网关Gateway IP地址的函数 查DNS DNS没做缓存简化版测试查询DNS发UDP包。 一个域名对应多个ip也不知道多少个ip用的/usr/include/x86_64-linux-gnu/sys/queue.h  参照下面的bcl_udp.h #include sys/queue.h
• https.h #ifndef ARP_TEST_HTTPS_H #define ARP_TEST_HTTPS_H#include openssl/ssl.h /* SSL_Library_init() */ #include openssl/err.hint https_get_body(char *ip, char *in_path, char *out_path);#endif //ARP_TEST_HTTPS_H
• https.c /** ref: https://aticleworld.com/ssl-server-client-using-openssl-in-c/* sudo apt-get install libssl–dev* -L/path/to/ssl_dir -lssl -lcrypto/ #include string.h / memset / / … */ #include https.hextern unsigned int ip2int(const char *ip);static SSL_CTX *InitCTX(void) {SSL_METHOD *method;SSL_CTX ctx;OpenSSL_add_all_algorithms(); / Load cryptos, et.al. /SSL_load_error_strings(); / Bring in and register error messages /method TLSv1_2_client_method(); / Create new client-method instance /ctx SSL_CTX_new(method); / Create new context */if ( ctx NULL ) {ERR_print_errors_fp(stderr);abort();}return ctx; }ssize_t send_from_file_ssl(SSL *ssl, char *path) {byte_t buf NULL;size_t isz 0;ssize_t outBytes;buf file_get_contents(path, isz);outBytes SSL_write(ssl, buf, isz);/ bcl_xxd(buf, isz); */free(buf);return outBytes; }int https_get_body(char *ip, char *in_path, char *out_path) {SSL_CTX *ctx NULL;SSL *ssl;int bytes; #define HTTPS_BUFF_SIZE 4096char buf[HTTPS_BUFF_SIZE];int sockfd -1;FILE out NULL;SSL_library_init();ctx InitCTX();ssl SSL_new(ctx); / create new SSL connection state /sockfd bcl_tcp_connector(ip2int(ip), 443);SSL_set_fd(ssl, sockfd); / attach the socket descriptor /if ( SSL_connect(ssl) 0 ) { / perform the connection /ERR_print_errors_fp(stderr);return E_FAIL;}send_from_file_ssl(ssl, in_path);bytes SSL_read(ssl, buf, HTTPS_BUFF_SIZE);/ Dump HTTP header */bcl_xxd(buf, bytes);out fopen(out_path, w);if (NULL out) {bclerreg(E_OSCALL, FL, fopen(%s), out_path);return E_FAIL;}while (0(bytes SSL_read(ssl, buf, HTTPS_BUFF_SIZE))) {fwrite(buf, 1, bytes, out);memset(buf, 0, bytes);}fclose(out);bcl_closesock(sockfd);SSL_free(ssl);SSL_CTX_free(ctx);return E_OK; } 先准备ssl需要的库, SSL_Libary_init(), 创建SSL_CTX *ctx对象    封装socket fd为SSL * 操作SSL *取代 int fd。SSL_read替换recv SSL_write替换send close(fd)关闭socket fd。用完SSL_free(ssl),  释放https链接。销毁SSL_CTX ctx对象  SSL_read第0次调用拿到http header再调用得到的是http body。不需要手动解析http \r\n 0x0d 0x0a, 也省了很多麻烦。 int bcl_tcp_connector(u_int32_t _addr, u_int16_t _port) {struct sockaddr_in saddr;int sock;int ret;for (;;) {sock socket(AF_INET, SOCK_STREAM, 0);if (sock 0) {/ … */return E_FAIL;}memset(saddr, 0x00, sizeof (saddr));saddr.sin_family AF_INET;saddr.sin_addr.s_addr _addr;saddr.sin_port htons(_port);ret connect(sock, (struct sockaddr )saddr, sizeof(saddr));if (ret 0) {return sock;}/ ERROR connect */if (errno EINTR) {bcl_closesock(sock);continue;}char ip[16];bcl_int2ip(ip, _addr);bclerreg(E_OSCALL, FL, Error connect %s:%d, ip, _port);return E_FAIL;} } 创建socket fd调用connect常规方法。  bcl_xxd函数hexdump调试用 uint8_t arc_xxd(byte *s, uint8_t len, void *param);void bcl_xxd(const void *s, size_t len) {uint16_t line 0;byte *t (byte *)s;uint8_t b;size_t left len;for (; ;) {if (left 16) {b arc_xxd(t, 16, line);} else {b arc_xxd(t, left, line);}if (b 1) {break;}left - b;if (left 0) {break;}t b;} }uint8_t arc_xxd(byte *s, uint8_t len, void *param) {uint8_t i;uint16_t *line (uint16_t *)param;fprintf(stdout, %08x:, line 4);for (i 0; i2 len; i2) {fprintf(stdout, %02x%02x, s[i], s[i1]);}if (i len) {fprintf(stdout, %02x, s[i]); i 1;}if (i len) {fprintf(stdout, %02x, s[i]); i1;}if (i 16 0x00 ! (i 0x01)) { fputs( , stdout); i1;}for (; i 16; i 2) {fputs( , stdout); / space * 5 */}fputs( , stdout);for (i 0; i len; i) {if (s[i] 0x20 || s[i] 0x7e) {fputc(., stdout);} else {fputc(s[i], stdout);}}fputs(\r\n, stdout);line 1;return i; } bcl_udp.h #ifndef ERRLOG_BCL_UDP_H #define ERRLOG_BCL_UDP_H#include sys/queue.htypedef union {unsigned char c[4];unsigned int addr; } IPv4_t;void IPv4_toString(char s, IPv4_t ipv4); / in_addr_t */ unsigned int ip2int(const char *ip);struct ipv4_entry {char data[16];TAILQ_ENTRY(ipv4_entry) entries; }; TAILQ_HEAD(ipv4head, ipv4_entry);int bcl_dns_query(struct ipv4head *head, char *host_name, const char *dns_ip);#endif //ERRLOG_BCL_UDP_H
• bcl_udp.c #ifdef __cplusplus extern C { #endif#include strings.h /* bzero / #include arpa/inet.h / inet_addr / #include unistd.h / close / #include string.h / strcat, memset / #include stdlib.h / getenv(), rand() /#include bcl_udp.h #include arclog.h #include bcl_socket.h#define PRIVATE staticunsigned int / in_addr_t */ip2int(const char ip) {IPv4_t un;int i, j;un.c[0] un.c[1] un.c[2] un.c[3] 0;for (i 0, j 0; i 16 ip[i] ! \0; i) {if (0x30 ip[i] ip[i] 0x3a) { / 0,9 */un.c[j] * 10;un.c[j] ip[i] - 0x30;} else if (ip[i] 0x2e) { /* . /j 1;}}return un.addr; }typedef struct {u_short transId; / 0xb6f6 /u_short flags; / 0x0100 Standard query /u_short questions; / 0x0001 /u_char rss[6]; / 00 00 00 00 00 00 / } DnsHdr_t;#define HOST_LEN 64typedef struct {u_char name[2]; / ptr /u_short type; / 0x0005 alias /u_short in; / 0x0001 /u_int32_t ttl; / 81, 1min21s /u_short dataLen; / 0x0017, 23 /char cname[HOST_LEN]; / 3www31633com8163jiasu3com / } attribute((packed)) DnsAnswer_t;/** ref: https://www.linuxquestions.org/questions/linux-networking-3/dns-packet-structure-289886/* param name p3-sign.douyinpic.com* param entry 7p3-sign9douyinpic3com* return*/ PRIVATE char *dns_entry(char *entry, const char *name) {const char *p name;char *q entry;int8_t len;while (\0 ! *p) {len 0;for (; *p *p ! .; p) {len 1;}*q len;memcpy(q, p - len, len);q len;p;}return q; }#define SWAP(a, b, type) do { type _t a; a b; b _t;} while(0);#define REVERSE(a, b, type) do { \type *p a, *q b; \type t; \if (p q) { SWAP(p, q, type *);} \for (; p q; p, q–) { \t *p; *p *q; *q t; }
  } while (0);void IPv4_toString(char *s, IPv4_t ipv4) {int i;char *t; #ifdef ORDER_LITTLE_ENDIANfor (i 0; i 4; i) { #elsefor (i 3; 0 i; i–) { #endift s;while (ipv4.c[i]) {*s ipv4.c[i] % 10 0x30;ipv4.c[i] / 10;}REVERSE(s-1, t, char);s .;}(s-1) \0; }int bcl_dns_query(struct ipv4head *head, char *host_name, const char *dns_ip) {int sockfd;char buf[1024] {\0};struct sockaddr_in dest_addr;DnsHdr_t header;char *p NULL;off_t queryLen;DnsAnswer_t ans;IPv4_t ipv4;struct ipv4_entry n1 NULL;sockfd socket(AF_INET, SOCK_DGRAM, 0);if (sockfd 0) {bclerreg(E_OSCALL, FL, socket() UDP);return E_FAIL;}/ DNS address /memset(dest_addr, 0, sizeof(struct sockaddr_in));dest_addr.sin_family AF_INET;dest_addr.sin_addr.s_addr ip2int(dns_ip);dest_addr.sin_port htons(53); / DNS port 53 */if (connect(sockfd, (const struct sockaddr ) dest_addr, sizeof(dest_addr)) 0) {bclerreg(E_OSCALL, FL, connect());return E_FAIL;}/ DNS query packet /header.transId (u_short) rand();header.flags htons(0x0100);header.questions htons(0x0001);memset(header.rss, 0, sizeof(header.rss));memcpy(buf, header, sizeof(header));p buf sizeof(header);/ queries: p3-sign.douyinpic.com */p dns_entry(p, host_name);p \0;/ type A, class IN */*p 0x00; *p 0x01;*p 0x00; p 0x01;queryLen p - buf;if (send(sockfd, buf, queryLen, 0) 0) {bclerreg(E_OSCALL, FL, send());return E_FAIL;}memset(buf, 0, 1024);if (recv(sockfd, buf, 1024, 0) 1) {bclerreg(E_OSCALL, FL, recv());return E_FAIL;}p buf queryLen;/ Answers: buf queryLen */TAILQ_INIT(head);while (p ! 0x00) {/ bcl_xxd(p, 0xa0); /if ((u_char )p 0xc0) {/ c0 0c, c0 14 */ans.dataLen ntohs(((DnsAnswer_t *)p)-dataLen);} #if DEBUGprintf(dataLen%d\n, ans.dataLen);bcl_xxd(((DnsAnswer_t )p)-cname, ans.dataLen); #endifif (4 ans.dataLen) { / IPv4 */memcpy(ipv4, ((DnsAnswer_t *)p)-cname, 4);n1 (struct ipv4_entry *)malloc(sizeof(struct ipv4_entry));IPv4_toString(n1-data, ipv4);TAILQ_INSERT_TAIL(head, n1, entries);}p sizeof(DnsAnswer_t) - HOST_LEN ans.dataLen;}return E_OK; }#ifdef __cplusplus }; #endif 查询DNS以上 C:\Windows\system32\wsl.exe –distribution Ubuntu –exec /bin/bash -c export ESWTDIR/mnt/e/CLionProjects/arp export FAPWORKDIR/mnt/e/CLionProjects/arp/fap30 cd /mnt/e/CLionProjects/arp/fap30 /mnt/e/CLionProjects/arp/cmake-build-debug/arp_test ./input/banner.txt banner_3.jpg ip61.164.142.245 ip115.231.71.216 path_dst/mnt/e/CLionProjects/arp/fap30/print/sale.jpg 00000000: 4854 5450 2f31 2e31 2032 3030 204f 4b0d  HTTP/1.1 200 OK. 00000010: 0a4c 6173 742d 4d6f 6469 6669 6564 3a20  .Last-Modified: 00000020: 5375 6e2c 2032 3220 4f63 7420 3230 3233  Sun, 22 Oct 2023 00000030: 2030 383a 3036 3a30 3320 474d 540d 0a45   08:06:03 GMT..E 00000040: 7461 673a 2022 3336 3333 3661 6665 3533  tag: 36336afe53 00000050: 3039 6561 3933 6163 6633 3930 6162 3934  09ea93acf390ab94 00000060: 3637 6132 6634 220d 0a43 6f6e 7465 6e74  67a2f4..Content 00000070: 2d54 7970 653a 2069 6d61 6765 2f6a 7065  -Type: image/jpe 00000080: 670d 0a44 6174 653a 2053 756e 2c20 3232  g..Date: Sun, 22 00000090: 204f 6374 2032 3032 3320 3038 3a30 363a   Oct 2023 08:06: 000000a0: 3034 2047 4d54 0d0a 5365 7276 6572 3a20  04 GMT..Server: 000000b0: 7465 6e63 656e 742d 636f 730d 0a78 2d63  tencent-cos..x-c 000000c0: 6f73 2d68 6173 682d 6372 6336 3465 636d  os-hash-crc64ecm 000000d0: 613a 2031 3534 3631 3131 3537 3934 3831  a: 1546111579481 000000e0: 3535 3537 3339 340d 0a78 2d63 6f73 2d72  5557394..x-cos-r 000000f0: 6571 7565 7374 2d69 643a 204e 6a55 7a4e  equest-id: NjUzN 00000100: 4751 335a 574e 664e 5755 7a4e 6a51 774d  GQ3ZWNfNWUzNjQwM 00000110: 474a 664d 5745 305a 4446 664f 5459 314f  GJfMWE0ZDFfOTY1O 00000120: 4442 6b4e 673d 3d0d 0a43 6f6e 7465 6e74  DBkNg..Content 00000130: 2d4c 656e 6774 683a 2032 3237 3938 0d0a  -Length: 22798.. 00000140: 4163 6365 7074 2d52 616e 6765 733a 2062  Accept-Ranges: b 00000150: 7974 6573 0d0a 582d 4e57 532d 4c4f 472d  ytes..X-NWS-LOG- 00000160: 5555 4944 3a20 3735 3537 3138 3835 3632  UUID: 7557188562 00000170: 3130 3431 3837 3231 320d 0a43 6f6e 6e65  104187212..Conne 00000180: 6374 696f 6e3a 206b 6565 702d 616c 6976  ction: keep-aliv 00000190: 650d 0a58 2d43 6163 6865 2d4c 6f6f 6b75  e..X-Cache-Looku 000001a0: 703a 2043 6163 6865 2048 6974 0d0a 0d0a  p: Cache Hit…. Process finished with exit code 0 查看下载 E:\CLionProjects\arp\fap30\print\sale.jpg 对于http响应body有的返回是gzip压缩要用zlib库解压。分段的内容要解析 /** ref: https://www.iteye.com/blog/dbscx-830644 */ char *http_chunked_parse(char *s, u_int16_t len) {int i;/ 0x1000 4096 */len 0;for (i 0; i 4; i) {if (s[i] 0x0d s[i1] 0x0a) {break;}/ 32 63 31 0d 0a 3c1\r\n(LEN0x2c1, Dec:705) */*len * 16;if (0x30s[i] s[i] 0x40) {*len s[i] - 0x30;} else if (0x61 s[i] s[i] 0x67) {*len s[i] - 0x61 10;}}if (s[i] 0x0d s[i1] 0x0a) {s s[i] 2;}return s; }0d 0a 30 0d 0a 0d 0a 结束