41 lines
1.2 KiB
C
41 lines
1.2 KiB
C
/* Client che interroga un echo server */
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#include "basic.h"
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void client_echo(FILE *fp, int sockfd);
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int main(int argc, char **argv) {
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int sockfd, n;
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struct sockaddr_in servaddr;
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if (argc != 3)
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{ printf("usage: echocli <IPaddress> <PORT>\n"); exit(1); }
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if ( (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
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{ printf("socket error\n"); exit(1); }
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bzero(&servaddr, sizeof(servaddr));
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servaddr.sin_family = AF_INET;
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servaddr.sin_port = htons(atoi(argv[2])); /* echo server port */
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if (inet_pton(AF_INET, argv[1], &servaddr.sin_addr) <= 0)
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{ printf("inet_pton error for %s", argv[1]); exit(1);}
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if (connect(sockfd, (struct sockaddr *) &servaddr, sizeof(servaddr)) < 0)
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{ printf("connect error\n"); exit(1);}
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client_echo(stdin, sockfd); /* svolge tutto il lavoro del client */
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exit(0);
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}
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void client_echo(FILE *fp, int sockfd) {
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char sendline[MAXLINE], recvline[MAXLINE];
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while (fgets(sendline, MAXLINE, fp) != NULL) {
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reti_writen(sockfd, sendline, strlen(sendline));
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if (reti_readline(sockfd, recvline, MAXLINE) == 0)
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{ printf("%s: server terminated prematurely",__FILE__); exit(1); }
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fputs(recvline, stdout);
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}
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}
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