我有兩個服務器代碼:什麼是使用tcp socket的數據轉換模式?
的第一臺服務器:直到串完成每次向客戶端發送一個char
int main(int argc, char **argv) { int listenfd, connfd; struct sockaddr_in servaddr; char buff[MAXLINE]; time_t ticks; char temp[1]; int i = 0; listenfd = Socket(AF_INET, SOCK_STREAM, 0); bzero(&servaddr, sizeof(servaddr)); servaddr.sin_family = AF_INET; servaddr.sin_addr.s_addr = htonl(INADDR_ANY); servaddr.sin_port = htons(9999); /* daytime server */ Bind(listenfd, (SA *) &servaddr, sizeof(servaddr)); Listen(listenfd, LISTENQ); for (; ;) { connfd = Accept(listenfd, (SA *) NULL, NULL); ticks = time(NULL); snprintf(buff, sizeof(buff), "%.24s\r\n", ctime(&ticks)); for(i = 0; i < strlen(buff); i++) { temp[0] = buff[i]; Write(connfd, temp, strlen(temp)); } Close(connfd); } }
第二服務器:向客戶端發送一個字符串
int main(int argc, char **argv) { int listenfd, connfd; struct sockaddr_in servaddr; char buff[MAXLINE]; time_t ticks; char temp[1]; int i = 0; listenfd = Socket(AF_INET, SOCK_STREAM, 0); bzero(&servaddr, sizeof(servaddr)); servaddr.sin_family = AF_INET; servaddr.sin_addr.s_addr = htonl(INADDR_ANY); servaddr.sin_port = htons(9999); /* daytime server */ Bind(listenfd, (SA *) &servaddr, sizeof(servaddr)); Listen(listenfd, LISTENQ); for (; ;) { connfd = Accept(listenfd, (SA *) NULL, NULL); ticks = time(NULL); snprintf(buff, sizeof(buff), "%.24s\r\n", ctime(&ticks)); Write(connfd, buff, strlen(buff)); Close(connfd); } }
客戶端:收到服務器發送的字符
int main(int argc, char **argv) { int sockfd, n; char recvline[MAXLINE + 1]; struct sockaddr_in servaddr; int count = 0; if (argc != 2) err_quit("usage: a.out <IPaddress>"); if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) err_sys("socket error"); bzero(&servaddr, sizeof(servaddr)); servaddr.sin_family = AF_INET; servaddr.sin_port = htons(9999); /* daytime server */ if (inet_pton(AF_INET, argv[1], &servaddr.sin_addr) <= 0) err_quit("inet_pton error for %s", argv[1]); if (connect(sockfd, (SA *) &servaddr, sizeof(servaddr)) < 0) err_sys("connect error"); while ((n = read(sockfd, recvline, MAXLINE)) > 0) { recvline[n] = 0; /* null terminate */ count++; if (fputs(recvline, stdout) == EOF) err_sys("fputs error"); } if (n < 0) err_sys("read error"); printf("read time:%d\n", count); exit(0); }
的結果是既變盤點的輸出爲1。我的問題是,爲什麼第一臺服務器的輸出是1,我想結果應該strlen的(BUFF)爲第1服務器?
PS:我在同一臺機器上運行服務器和客戶端。
第一個服務器有一個緩衝區溢出:'char temp [1];'必須是'char temp [2]; temp [1] = 0;''或者你必須將'strlen(temp)'替換爲1. –