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| #include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <assert.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/sendfile.h>
int main(int argc, char* argv[])
{
if (argc <= 3)
{
printf("usage: %s ip_address port_number filename\n", basename(argv[0]));
return 1;
}
const char* ip = argv[1];
int port = atoi(argv[2]);
const char* file_name = "/opt/test.txt";
int filefd = open(file_name, O_RDONLY);
assert(filefd > 0);
struct stat stat_buf;
fstat(filefd, &stat_buf);
struct sockaddr_in address = {0};
address.sin_family = AF_INET;
inet_pton(AF_INET, ip, &address.sin_addr);
address.sin_port = htons(port);
int sock = socket(PF_INET, SOCK_STREAM, 0);
assert(sock >= 0);
int ret = bind(sock, (struct sockaddr*)&address, sizeof(address));
assert(ret != -1);
ret = listen(sock, 5);
assert(ret != -1);
struct sockaddr_in client;
socklen_t client_addrlength = sizeof(client);
int connfd = accept(sock, (struct sockaddr*)&client, &client_addrlength);
if (connfd < 0)
{
printf("errno is: %d\n", errno);
}
else
{
sendfile(connfd, filefd, NULL, stat_buf.st_size);
close(connfd);
}
close(sock);
return 0;
}
|