#include "unp.h"## 1 ##src/names/daytimetcpcli1.c## int## 2 ##src/names/daytimetcpcli1.c## main(int argc, char **argv)## 3 ##src/names/daytimetcpcli1.c## {## 4 ##src/names/daytimetcpcli1.c## int sockfd, n;## 5 ##src/names/daytimetcpcli1.c## char recvline[MAXLINE + 1];## 6 ##src/names/daytimetcpcli1.c## struct sockaddr_in servaddr;## 7 ##src/names/daytimetcpcli1.c## struct in_addr **pptr;## 8 ##src/names/daytimetcpcli1.c## struct in_addr *inetaddrp[2];## 9 ##src/names/daytimetcpcli1.c## struct in_addr inetaddr;## 10 ##src/names/daytimetcpcli1.c## struct hostent *hp;## 11 ##src/names/daytimetcpcli1.c## struct servent *sp;## 12 ##src/names/daytimetcpcli1.c## if (argc != 3)## 13 ##src/names/daytimetcpcli1.c## err_quit("usage: daytimetcpcli1 ");## 14 ##src/names/daytimetcpcli1.c## if ((hp = gethostbyname(argv[1])) == NULL) {## 15 ##src/names/daytimetcpcli1.c## if (inet_aton(argv[1], &inetaddr) == 0) {## 16 ##src/names/daytimetcpcli1.c## err_quit("hostname error for %s: %s", argv[1],## 17 ##src/names/daytimetcpcli1.c## hstrerror(h_errno));## 18 ##src/names/daytimetcpcli1.c## } else {## 19 ##src/names/daytimetcpcli1.c## inetaddrp[0] = &inetaddr;## 20 ##src/names/daytimetcpcli1.c## inetaddrp[1] = NULL;## 21 ##src/names/daytimetcpcli1.c## pptr = inetaddrp;## 22 ##src/names/daytimetcpcli1.c## }## 23 ##src/names/daytimetcpcli1.c## } else {## 24 ##src/names/daytimetcpcli1.c## pptr = (struct in_addr **) hp->h_addr_list;## 25 ##src/names/daytimetcpcli1.c## }## 26 ##src/names/daytimetcpcli1.c## if ((sp = getservbyname(argv[2], "tcp")) == NULL)## 27 ##src/names/daytimetcpcli1.c## err_quit("getservbyname error for %s", argv[2]);## 28 ##src/names/daytimetcpcli1.c## for (; *pptr != NULL; pptr++) {## 29 ##src/names/daytimetcpcli1.c## sockfd = Socket(AF_INET, SOCK_STREAM, 0);## 30 ##src/names/daytimetcpcli1.c## bzero(&servaddr, sizeof(servaddr));## 31 ##src/names/daytimetcpcli1.c## servaddr.sin_family = AF_INET;## 32 ##src/names/daytimetcpcli1.c## servaddr.sin_port = sp->s_port;## 33 ##src/names/daytimetcpcli1.c## memcpy(&servaddr.sin_addr, *pptr, sizeof(struct in_addr));## 34 ##src/names/daytimetcpcli1.c## printf("trying %s\n", Sock_ntop((SA *) &servaddr, sizeof(servaddr)));## 35 ##src/names/daytimetcpcli1.c## if (connect(sockfd, (SA *) &servaddr, sizeof(servaddr)) == 0)## 36 ##src/names/daytimetcpcli1.c## break; /* success */## 37 ##src/names/daytimetcpcli1.c## err_ret("connect error");## 38 ##src/names/daytimetcpcli1.c## close(sockfd);## 39 ##src/names/daytimetcpcli1.c## }## 40 ##src/names/daytimetcpcli1.c## if (*pptr == NULL)## 41 ##src/names/daytimetcpcli1.c## err_quit("unable to connect");## 42 ##src/names/daytimetcpcli1.c## while ((n = Read(sockfd, recvline, MAXLINE)) > 0) {## 43 ##src/names/daytimetcpcli1.c## recvline[n] = 0; /* null terminate */## 44 ##src/names/daytimetcpcli1.c## Fputs(recvline, stdout);## 45 ##src/names/daytimetcpcli1.c## }## 46 ##src/names/daytimetcpcli1.c## exit(0);## 47 ##src/names/daytimetcpcli1.c## }## 48 ##src/names/daytimetcpcli1.c##