linux网络编程

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物数网运会表应

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数/网/传操作系统  应用层软件解析

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以太网帧协议

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2 ^16

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2 ^ 16  最多65536个 范围0开始

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socket函数  man socket

int socket(int domain, int type, int protocol);

fd = socket(AF_INET,  SOCK_STREAM, 0);

bind 函数

int bind(int sockfd, const struct sockaddr *addr, socklen_t addrlen);

struct sockaddr {

              sa_family_t sa_family;

              char        sa_data[14];

          }

return任意整型 失败-1

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详细代码github。