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More fine-grained logging messages on ZeroReturn/Syscall error cases

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svn:r467
This commit is contained in:
Nick Mathewson 2003-09-16 20:53:09 +00:00
parent 3f3f8921f6
commit 5f9ac2bdfd
1 changed files with 19 additions and 18 deletions
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35
src/common/tortls.c
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@ -57,6 +57,9 @@ tls_log_error(int severity, const char *doing)
} }
} }
#define CATCH_SYSCALL 1
#define CATCH_ZERO 2
static int static int
tor_tls_get_error(tor_tls *tls, int r, int extra, tor_tls_get_error(tor_tls *tls, int r, int extra,
const char *doing, int severity) const char *doing, int severity)
@ -70,13 +73,15 @@ tor_tls_get_error(tor_tls *tls, int r, int extra,
case SSL_ERROR_WANT_WRITE: case SSL_ERROR_WANT_WRITE:
return TOR_TLS_WANTWRITE; return TOR_TLS_WANTWRITE;
case SSL_ERROR_SYSCALL: case SSL_ERROR_SYSCALL:
/* This is oververbose XXX */ if (extra&CATCH_SYSCALL)
tls_log_error(severity, doing); return _TOR_TLS_SYSCALL;
return extra ? _TOR_TLS_SYSCALL : TOR_TLS_ERROR; log(severity, "TLS error: <syscall error>.");
return TOR_TLS_ERROR;
case SSL_ERROR_ZERO_RETURN: case SSL_ERROR_ZERO_RETURN:
/* This is oververbose XXX */ if (extra&CATCH_ZERO)
tls_log_error(severity, doing); return _TOR_TLS_ZERORETURN;
return extra ? _TOR_TLS_ZERORETURN : TOR_TLS_ERROR; log(severity, "TLS error: Zero return");
return TOR_TLS_ERROR;
default: default:
tls_log_error(severity, doing); tls_log_error(severity, doing);
return TOR_TLS_ERROR; return TOR_TLS_ERROR;
@ -299,11 +304,8 @@ tor_tls_read(tor_tls *tls, char *cp, int len)
r = SSL_read(tls->ssl, cp, len); r = SSL_read(tls->ssl, cp, len);
if (r > 0) if (r > 0)
return r; return r;
err = tor_tls_get_error(tls, r, 1, "reading", LOG_ERR); err = tor_tls_get_error(tls, r, CATCH_ZERO, "reading", LOG_ERR);
if (err == _TOR_TLS_SYSCALL) { if (err == _TOR_TLS_ZERORETURN) {
log(LOG_ERR, "TLS error while reading: syscall error");
return TOR_TLS_ERROR;
} else if (err == _TOR_TLS_ZERORETURN) {
tls->state = TOR_TLS_ST_CLOSED; tls->state = TOR_TLS_ST_CLOSED;
return TOR_TLS_CLOSE; return TOR_TLS_CLOSE;
} else { } else {
@ -326,8 +328,7 @@ tor_tls_write(tor_tls *tls, char *cp, int n)
if (n == 0) if (n == 0)
return 0; return 0;
r = SSL_write(tls->ssl, cp, n); r = SSL_write(tls->ssl, cp, n);
err = tor_tls_get_error(tls, r, 1, "writing", LOG_ERR); err = tor_tls_get_error(tls, r, 0, "writing", LOG_ERR);
assert(err != _TOR_TLS_ZERORETURN);
if (err == TOR_TLS_DONE) { if (err == TOR_TLS_DONE) {
return r; return r;
} else { } else {
@ -376,13 +377,12 @@ tor_tls_shutdown(tor_tls *tls)
do { do {
r = SSL_read(tls->ssl, buf, 128); r = SSL_read(tls->ssl, buf, 128);
} while (r>0); } while (r>0);
err = tor_tls_get_error(tls, r, 1, "reading to shut down", LOG_ERR); err = tor_tls_get_error(tls, r, CATCH_ZERO, "reading to shut down",
LOG_ERR);
if (err == _TOR_TLS_ZERORETURN) { if (err == _TOR_TLS_ZERORETURN) {
tls->state = TOR_TLS_ST_GOTCLOSE; tls->state = TOR_TLS_ST_GOTCLOSE;
/* fall through... */ /* fall through... */
} else { } else {
if (err == _TOR_TLS_SYSCALL)
err = TOR_TLS_ERROR;
return err; return err;
} }
} }
@ -393,7 +393,8 @@ tor_tls_shutdown(tor_tls *tls)
tls->state = TOR_TLS_ST_CLOSED; tls->state = TOR_TLS_ST_CLOSED;
return TOR_TLS_DONE; return TOR_TLS_DONE;
} }
err = tor_tls_get_error(tls, r, 1, "shutting down", LOG_ERR); err = tor_tls_get_error(tls, r, CATCH_SYSCALL|CATCH_ZERO, "shutting down",
LOG_ERR);
if (err == _TOR_TLS_SYSCALL) { if (err == _TOR_TLS_SYSCALL) {
/* The underlying TCP connection closed while we were shutting down. */ /* The underlying TCP connection closed while we were shutting down. */
tls->state = TOR_TLS_ST_CLOSED; tls->state = TOR_TLS_ST_CLOSED;