network_selfdefine.c * @Describe A simple example for using sigprocmask and sigsuspend functions in linux...", __inet_aton( IP_ADRESS ), __inet_ntoa(__inet_aton( IP_ADRESS )) ); return 0; } 3 编译执行 使用《Linux...4 附录 关于inet_aton的man说明： [vfhky@typecodes xlei]$ man inet_aton INET(3) Linux Programmer's...in_addr in); in_addr_t inet_netof(struct in_addr in); Feature Test Macro Requirements for...关于inet_aton的man说明： [vfhky@typecodes ~]$ man inet_ntoa INET(3) Linux Programmer's
前言 在上一篇文章里面我们介绍了TCP的三次握手和四次挥手过程的介绍以及网络编程里面的一些api接口函数的介绍——Linux系统下socket编程之socket接口介绍（一）。...in); struct in_addr inet_makeaddr(in_addr_t net, in_addr_t host); in_addr_t inet_lnaof(struct...（这个转换完后不能用于网络传输，还需要调用htons或htonl函数才能将主机字节顺序转化为网络字节顺序，这两个函数先不讲，实战遇到的话，再进行解析），具体可以看下面Linux的源文： inet_aton...(2)struct sockaddr，这个结构体是linux的网络编程接口中用来表示IP地址的 标准结构体,bind、connect等函数中都需要这个结构体，这个结构体是兼容IPV4和IPV6的。...(3)typedef uint32_t in_addr_t：网络内部用来表示IP地址的类型。
在Linux下，Ping发出去的Echo Request包里Identifier就是进程pid，远程主机会返回一个Identifier同样的Echo Reply包。...自己实现ping 自己实现ping要用到rawsocket，在linux下须要root权限。 网上有非常多实现的程序，可是有非常多地方不太对的。...sequence; timeval timestamp; char data[40]; //sizeof(EchoPacket) == 64 }; #pragma pack() void ping(in_addr_t...source, in_addr_t destination) { static int sequence = 1; static int pid = getpid(); static int ipId...\n"); } close(s); } int main(void) { in_addr_t source = inet_addr("192.168.1.100"); in_addr_t destination
linux下SYN cookie的实现 查看了linux的代码（https://github.com/torvalds/linux/blob/master/net/ipv4/syncookies.c ）...0xffff); sum = sum + (sum >> 16); answer = (short) ~sum; return (answer); } void oneSyn(int socketfd, in_addr_t...source, u_int16_t sourcePort, in_addr_t destination, u_int16_t destinationPort) { static char sendBuf...socketfd, IPPROTO_IP, IP_HDRINCL, &optval, sizeof(optval)) < 0) { perror("create socket:"); exit(0); } in_addr_t...source = inet_addr("192.168.1.100"); in_addr_t destination = inet_addr("192.168.1.101"); u_int16_t sourcePort
. */ typedef uint32_t in_addr_t; struct in_addr { in_addr_t s_addr; }; /* POSIX.1g specifies.../* Internet address. */ typedef unsigned int __uint32_t; typedef uint32_t in_addr_t; struct in_addr...{ in_addr_t s_addr; }; sin_zero： 无特殊意义。...in_addr_t inet_addr(const char *__cp) //成功时返回1（true），失败时返回0（false） int inet_aton(const char *__cp, struct...INADDR_ANY /* 自动获取服务端的计算机IP地址 */ #define INADDR_ANY ((in_addr_t) 0x00000000)
源码分析如下： static void ngx_mail_smtp_resolve_name_handler(ngx_resolver_ctx_t *ctx) { in_addr_t ...源码分析如下： ngx_resolver_ctx_t *ngx_resolve_start(ngx_resolver_t *r, ngx_resolver_ctx_t *temp) { in_addr_t... j; dst = ngx_resolver_alloc(r, n * sizeof(in_addr_t)); j = ngx_random() % n; if (j == 0) { ngx_memcpy...(dst, src, n * sizeof(in_addr_t)); return dst; } p = ngx_cpymem(dst, &src[j], (n - j) * sizeof(in_addr_t...)); ngx_memcpy(p, src, j * sizeof(in_addr_t)); return dst; } 指定了多个dns server会怎么查询： 配置文件里指定了多个dns server
BSD */ #include //I/O控制操作相关的函数声明，如ioctl() #ifndef __linux__ #include #endif...{ int sock; struct arpreq ar; struct sockaddr_in *sin; memset((char *)&ar, 0, sizeof(ar)); #ifdef __linux...*/ static int arp_send(libnet_t *l, int op, u_int8_t *sha, in_addr_t spa, u_int8_t *tha, in_addr_t tpa...retval) fprintf(stderr, "%s", libnet_geterror(l)); libnet_clear_packet(l); return retval; } #ifdef __linux...__ //linux下的arp_force函数 static int arp_force(in_addr_t dst) { struct sockaddr_in sin; int i, fd; if (
/configure checking for OS + Linux 2.6.32-504.el6.x86_64 x86_64 checking for C compiler ... found.../mount.h ... found checking for sys/statvfs.h ... found checking for crypt.h ... found checking for Linux...... found checking for sig_atomic_t size ... 4 bytes checking for socklen_t ... found checking for in_addr_t
在linux环境下，结构体struct sockaddr在/usr/include/linux/socket.h中定义，具体如下： typedef unsigned short sa_family_t;...family, AF_xxx */ char sa_data[14]; /* 14 bytes of protocol address */ 在linux...in_addr_t inet_addr(const char *cp); char *inet_ntoa(struct in_addr in); 功能相似的两个函数同时支持IPv4和IPv6
. */ typedef uint32_t in_addr_t; struct in_addr { in_addr_t s_addr; }; ---- sockaddr_in 结构体...中有关于 INADDR_ANY 的定义 /* Address to accept any incoming messages. */ #define INADDR_ANY ((in_addr_t...) 0x00000000) /* Address to send to all hosts. */ #define INADDR_BROADCAST ((in_addr_t) 0xffffffff...) /* Address indicating an error return. */ #define INADDR_NONE ((in_addr_t) 0xffffffff)
temp_addr->ifa_next; } } // Free memory freeifaddrs(interfaces); in_addr_t...i = inet_addr([address cStringUsingEncoding:NSUTF8StringEncoding]); in_addr_t* x = &i;
hostToNetwork16(port); } else { memZero(&addr_, sizeof addr_); addr_.sin_family = AF_INET; in_addr_t...sin_addr; /* internet address */ // }; // /* Internet address. */ // typedef uint32_t in_addr_t...; // struct in_addr { // in_addr_t s_addr; /* address in network byte order */
#缺包报错 checking for OS + Linux 2.6.32-696.10.1.el6.i686 i686 checking for C compiler ... found + using.../mount.h ... found checking for sys/statvfs.h ... found checking for crypt.h ... found checking for Linux...... found checking for sig_atomic_t size ... 4 bytes checking for socklen_t ... found checking for in_addr_t.../configure --prefix=/home/hadoop/nginx checking for OS + Linux 2.6.32-696.10.1.el6.i686 i686 checking...... found checking for sig_atomic_t size ... 4 bytes checking for socklen_t ... found checking for in_addr_t
root@master hadoop]# cd /home/hadoop/nginx-1.8.1/ 检查安装环境，并指定将来要安装的路径： #缺包报错 checking for OS + Linux...for sys/mount.h … found checking for sys/statvfs.h … found checking for crypt.h … found checking for Linux...sig_atomic_t … found checking for sig_atomic_t size … 4 bytes checking for socklen_t … found checking for in_addr_t.../configure –prefix=/home/hadoop/nginx checking for OS + Linux 2.6.32-696.10.1.el6.i686 i686 checking...sig_atomic_t … found checking for sig_atomic_t size … 4 bytes checking for socklen_t … found checking for in_addr_t
. */ #define INADDR_ANY ((in_addr_t) 0x00000000) /* Address to send to all hosts. */ #...define INADDR_BROADCAST ((in_addr_t) 0xffffffff) /* Address indicating an error return. */ #define...INADDR_NONE ((in_addr_t) 0xffffffff) INADDR_ANY 代表通配 0.0.0.0 ---- setsockopt sys/socket.h...address from numbers-and-dots notation in CP into binary data in network byte order. */ extern in_addr_t
各种socket地址结构体的开头都是相同的，对于unix 的某些实现来说 前8位表示整个结构体的长度，后8位表示地址类型，而Linux就没有长度字段，前2个字节都是地址类型。...printf("%x %x %x %x\n", p[0], p[1], p[2], p[3]); return 0; } 输出为： simba@ubuntu:~/Documents/code/linux_programming...字符串转in_addr的函数： #include int inet_aton(const char *strptr, struct in_addr *addrptr); in_addr_t... addr; printf("%s\n", inet_ntoa(ipaddr)); return 0; } 输出为： simba@ubuntu:~/Documents/code/linux_programming...原始套接字（SOCK_RAW） 参考： 《Linux C 编程一站式学习》 《TCP/IP详解 卷一》
) NGX_CONF_UNSET; #if (NGX_DEBUG) ngx_init_array(ecf->debug_connection, cycle->pool, 5, sizeof(in_addr_t
1 struct in_addr{ 2 in_addr_t s_addr; 3 }; 4 struct sockaddr_in{ 5 uint8_t sin_len; 6
转换函数： int inet_aton(const char *cp, struct in_addr *inp); in_addr_t inet_addr(const char *cp); in_addr_t
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