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(proto): don't trust errno if krb5_net_read hasn't returned -1

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@6825 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Assar Westerlund
1999-08-16 12:43:43 +00:00
parent f5cb31ea9d
commit c139c81e0d
1 changed files with 18 additions and 7 deletions
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25
appl/kf/kf.c
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@@ -141,7 +141,8 @@ proto (int sock, const char *hostname, const char *service)
krb5_creds creds;
krb5_kdc_flags flags;
krb5_principal principal;
char ret_string[10];
char ret_string[10];
ssize_t n;
status = krb5_auth_con_init (context, &auth_context);
if (status) {
@@ -272,18 +273,23 @@ proto (int sock, const char *hostname, const char *service)
net_len = htonl(len);
if (krb5_net_write (context, &sock, &net_len, 4) != 4) {
krb5_warn (context, status, "krb5_net_write");
krb5_warn (context, errno, "krb5_net_write");
return 1;
}
if (krb5_net_write (context, &sock, packet.data, len) != len) {
krb5_warn (context, status, "krb5_net_write");
krb5_warn (context, errno, "krb5_net_write");
return 1;
}
krb5_data_free (&data);
if (krb5_net_read (context, &sock, &net_len, 4) != 4) {
krb5_warn (context, status, "krb5_net_read");
n = krb5_net_read (context, &sock, &net_len, 4);
if (n == 0) {
krb5_warnx (context, "EOF in krb5_net_read");
return 1;
}
if (n < 0) {
krb5_warn (context, errno, "krb5_net_read");
return 1;
}
len = ntohl(net_len);
@@ -291,8 +297,13 @@ proto (int sock, const char *hostname, const char *service)
krb5_warnx (context, "too long string back from %s", hostname);
return 1;
}
if (krb5_net_read (context, &sock, ret_string, len) != len) {
krb5_warnx (context, "read too short from %s", hostname);
n = krb5_net_read (context, &sock, ret_string, len);
if (n == 0) {
krb5_warnx (context, "EOF in krb5_net_read");
return 1;
}
if (n < 0) {
krb5_warn (context, errno, "krb5_net_read");
return 1;
}
ret_string[sizeof(ret_string) - 1] = '\0';