1 #pragma ident "%Z%%M% %I% %E% SMI" 2 /* 3 * lib/krb5/os/read_msg.c 4 * 5 * Copyright 1991 by the Massachusetts Institute of Technology. 6 * All Rights Reserved. 7 * 8 * Export of this software from the United States of America may 9 * require a specific license from the United States Government. 10 * It is the responsibility of any person or organization contemplating 11 * export to obtain such a license before exporting. 12 * 13 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and 14 * distribute this software and its documentation for any purpose and 15 * without fee is hereby granted, provided that the above copyright 16 * notice appear in all copies and that both that copyright notice and 17 * this permission notice appear in supporting documentation, and that 18 * the name of M.I.T. not be used in advertising or publicity pertaining 19 * to distribution of the software without specific, written prior 20 * permission. M.I.T. makes no representations about the suitability of 21 * this software for any purpose. It is provided "as is" without express 22 * or implied warranty. 23 * 24 * 25 * Write a message to the network 26 */ 27 28 #define NEED_SOCKETS 29 #include "k5-int.h" 30 #include <errno.h> 31 32 krb5_error_code 33 krb5_read_message(krb5_context context, krb5_pointer fdp, krb5_data *inbuf) 34 { 35 krb5_int32 len; 36 int len2, ilen; 37 char *buf = NULL; 38 int fd = *( (int *) fdp); 39 40 if ((len2 = krb5_net_read(context, fd, (char *)&len, 4)) != 4) 41 return((len2 < 0) ? errno : ECONNABORTED); 42 len = ntohl(len); 43 44 if ((len & VALID_UINT_BITS) != len) /* Overflow size_t??? */ 45 return ENOMEM; 46 47 inbuf->length = ilen = (int) len; 48 if (ilen) { 49 /* 50 * We may want to include a sanity check here someday.... 51 */ 52 if (!(buf = malloc(ilen))) { 53 return(ENOMEM); 54 } 55 if ((len2 = krb5_net_read(context, fd, buf, ilen)) != ilen) { 56 krb5_xfree(buf); 57 return((len2 < 0) ? errno : ECONNABORTED); 58 } 59 } 60 inbuf->data = buf; 61 return(0); 62 } 63