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Socket 通訊原理機制

#include <unistd.h> ssize_t read(int fd, void *buf, size_t count); ssize_t write(int fd, const void *buf, size_t count); #include <sys/types.h> #include <sys/socket.h> ssize_t send(int sockfd, const void *buf, size_t len, int flags); ssize_t recv(int
sockfd, void *buf, size_t len, int flags); ssize_t sendto(int sockfd, const void *buf, size_t len, int flags, const struct sockaddr *dest_addr, socklen_t addrlen); ssize_t recvfrom(int sockfd, void *buf, size_t len, int flags, struct sockaddr *src_addr, socklen_t *addrlen); ssize_t sendmsg(int
sockfd, const struct msghdr *msg, int flags); ssize_t recvmsg(int sockfd, struct msghdr *msg, int flags);