c/c++网络编程文件传输

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网络编程文件传输

1，文件发送端

2，文件接收端

文件发送端：

#include #include #include #include #include //结构体addrinfo, in_addr#include #include #include #include int main(int argc, char* argv[]){  char* service = "12345";  addrinfo hints, *res0, *res;  int err;  int sock;  int fd;  char buf[65536];  int n, ret;  if(argc != 3){return 1;}  fd = open(argv[2], O_RDONLY);  if(fd < 0){    perror("open");    return 1;  }  memset(&hints, 0, sizeof(hints));  hints.ai_socktype = SOCK_STREAM;  hints.ai_family = PF_UNSPEC;//既适应IPv4又适应IPv6  if((err = getaddrinfo(argv[1], service, &hints, &res0)) != 0){    printf("error %d:%sn", err, gai_strerror(err));    return 1;  }  for(res = res0; res != NULL; res = res->ai_next){    sock = socket(res->ai_family, res->ai_socktype, res->ai_protocol);    if(sock < 0){continue;}    if(connect(sock, res->ai_addr, res->ai_addrlen) != 0){      close(sock);      continue;    }    break;  }  freeaddrinfo(res0);  if(res == NULL){    printf("failedn");    return 1;  }  while((n = read(fd, buf, sizeof(buf))) > 0){    ret = write(sock, buf, n);    if(ret < 1){      perror("write");      break;    }  }  close(sock);  return 0;}

github源代码

发送端的执行方式：

./a.out 127.0.0.1 text.txt

文件接收端

#include #include #include #include #include //结构体addrinfo, in_addr#include #include #include #include int main(int argc, char* argv[]){  int sock0;  sockaddr_in client;  socklen_t len;  int sock;  addrinfo hints, *res;  int err;  int fd;  int n, ret;  char buf[65536];  if(argc != 2){return 1;}  fd = open(argv[1], O_WRONLY | O_CREAT, 0600);  memset(&hints, 0, sizeof(hints));  hints.ai_family = AF_INET;  hints.ai_flags = AI_PASSIVE;  hints.ai_socktype = SOCK_STREAM;  err = getaddrinfo(NULL, "12345", &hints, &res);  if(err != 0){    printf("error %d:%sn", err, gai_strerror(err));    return 1;  }  sock0 = socket(res->ai_family, res->ai_socktype, 0);  bind(sock0, res->ai_addr, res->ai_addrlen);  freeaddrinfo(res);  listen(sock0, 5);  len = sizeof(client);  sock = accept(sock0, (sockaddr*)&client, &len);  while((n = read(sock, buf, sizeof(buf))) > 0){    ret = write(fd, buf, n);  }  close(sock);  close(sock0);  return 0;}

github源代码

接收端的执行方式：