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6-3-sendfile.c
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6-3-sendfile.c
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#include <stdio.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <assert.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/sendfile.h>
int main(int argc, const char *argv[])
{
if (argc <= 3)
{
fprintf(stderr, "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 = argv[3];
int filefd = open(file_name, O_RDONLY);
assert( filefd > 0);
struct stat stat_buf;
fstat(filefd, &stat_buf);
struct sockaddr_in address;
bzero(&address, sizeof(address));
address.sin_family = AF_INET;
inet_pton(AF_INET, ip, &address.sin_addr);
address.sin_port = htons(port);
int sock = socket(AF_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)
{
fprintf(stderr, "accept error! errno:%d, errstr:%s\n", errno, strerror(errno));
}
else
{
sendfile(connfd, filefd, NULL, stat_buf.st_size);
close(connfd);
}
close(filefd);
close(sock);
return 0;
}