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http2: more and better error checking

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1 - fixes the warnings when built without http2 support

2 - adds CURLE_HTTP2, a new error code for errors detected by nghttp2
basically when they are about http2 specific things.
This commit is contained in:
Daniel Stenberg 2014-07-23 09:23:56 +02:00
parent 713f96ee0c
commit 81cd24adb8
7 changed files with 37 additions and 17 deletions
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3
docs/libcurl/libcurl-errors.3
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@ -83,6 +83,9 @@ FTP servers return a 227-line as a response to a PASV command. If libcurl
fails to parse that line, this return code is passed back.
.IP "CURLE_FTP_CANT_GET_HOST (15)"
An internal failure to lookup the host used for the new connection.
.IP "CURLE_HTTP2 (16)"
A problem was detected in the HTTP2 framing layer. This is somewhat generic
and can be one out of several problems, see the error buffer for details.
.IP "CURLE_FTP_COULDNT_SET_TYPE (17)"
Received an error when trying to set the transfer mode to binary or ASCII.
.IP "CURLE_PARTIAL_FILE (18)"

1
docs/libcurl/symbols-in-versions
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@ -79,6 +79,7 @@ CURLE_HTTP_PORT_FAILED 7.3 7.12.0
CURLE_HTTP_POST_ERROR 7.1
CURLE_HTTP_RANGE_ERROR 7.1 7.17.0
CURLE_HTTP_RETURNED_ERROR 7.10.3
CURLE_HTTP2 7.38.0
CURLE_INTERFACE_FAILED 7.12.0
CURLE_LDAP_CANNOT_BIND 7.1
CURLE_LDAP_INVALID_URL 7.10.8

4
include/curl/curl.h
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@ -423,7 +423,9 @@ typedef enum {
CURLE_FTP_WEIRD_PASV_REPLY, /* 13 */
CURLE_FTP_WEIRD_227_FORMAT, /* 14 */
CURLE_FTP_CANT_GET_HOST, /* 15 */
CURLE_OBSOLETE16, /* 16 - NOT USED */
CURLE_HTTP2, /* 16 - A problem in the http2 framing layer.
[was obsoleted in August 2007 for 7.17.0,
reused in July 2014 for 7.38.0] */
CURLE_FTP_COULDNT_SET_TYPE, /* 17 */
CURLE_PARTIAL_FILE, /* 18 */
CURLE_FTP_COULDNT_RETR_FILE, /* 19 */

14
lib/http.c
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@ -1760,8 +1760,9 @@ CURLcode Curl_http(struct connectdata *conn, bool *done)
if(result)
return result;
/* TODO: add error checking here */
Curl_http2_switched(conn);
result = Curl_http2_switched(conn);
if(result)
return result;
break;
case NPN_HTTP1_1:
/* continue with HTTP/1.1 when explicitly requested */
@ -1773,7 +1774,9 @@ CURLcode Curl_http(struct connectdata *conn, bool *done)
}
else {
/* prepare for a http2 request */
Curl_http2_setup(conn);
result = Curl_http2_setup(conn);
if(result)
return result;
}
http = data->req.protop;
@ -3007,8 +3010,9 @@ CURLcode Curl_http_readwrite_headers(struct SessionHandle *data,
k->upgr101 = UPGR101_RECEIVED;
/* switch to http2 now */
/* TODO: add error checking */
Curl_http2_switched(conn);
result = Curl_http2_switched(conn);
if(result)
return result;
}
break;
default:

24
lib/http2.c
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@ -810,12 +810,12 @@ CURLcode Curl_http2_setup(struct connectdata *conn)
return Curl_add_buffer(httpc->header_recvbuf, "HTTP/2.0 200\r\n", 14);
}
int Curl_http2_switched(struct connectdata *conn)
CURLcode Curl_http2_switched(struct connectdata *conn)
{
/* TODO: May get CURLE_AGAIN */
CURLcode rc;
struct http_conn *httpc = &conn->proto.httpc;
int rv;
struct SessionHandle *data = conn->data;
httpc->recv_underlying = (recving)conn->recv[FIRSTSOCKET];
httpc->send_underlying = (sending)conn->send[FIRSTSOCKET];
@ -827,7 +827,15 @@ int Curl_http2_switched(struct connectdata *conn)
NGHTTP2_CLIENT_CONNECTION_PREFACE,
NGHTTP2_CLIENT_CONNECTION_PREFACE_LEN,
&rc);
assert(rv == 24);
if(rc)
/* TODO: This may get CURLE_AGAIN */
return rc;
if(rv != 24) {
failf(data, "Only sent partial HTTP2 packet");
return CURLE_SEND_ERROR;
}
if(conn->data->req.upgr101 == UPGR101_RECEIVED) {
/* stream 1 is opened implicitly on upgrade */
httpc->stream_id = 1;
@ -835,9 +843,9 @@ int Curl_http2_switched(struct connectdata *conn)
rv = nghttp2_session_upgrade(httpc->h2, httpc->binsettings,
httpc->binlen, NULL);
if(rv != 0) {
failf(conn->data, "nghttp2_session_upgrade() failed: %s(%d)",
failf(data, "nghttp2_session_upgrade() failed: %s(%d)",
nghttp2_strerror(rv), rv);
return -1;
return CURLE_HTTP2;
}
}
else {
@ -845,12 +853,12 @@ int Curl_http2_switched(struct connectdata *conn)
httpc->stream_id = -1;
rv = nghttp2_submit_settings(httpc->h2, NGHTTP2_FLAG_NONE, NULL, 0);
if(rv != 0) {
failf(conn->data, "nghttp2_submit_settings() failed: %s(%d)",
failf(data, "nghttp2_submit_settings() failed: %s(%d)",
nghttp2_strerror(rv), rv);
return -1;
return CURLE_HTTP2;
}
}
return 0;
return CURLE_OK;
}
#endif

4
lib/http2.h
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@ -37,13 +37,13 @@ CURLcode Curl_http2_send_request(struct connectdata *conn);
CURLcode Curl_http2_request_upgrade(Curl_send_buffer *req,
struct connectdata *conn);
CURLcode Curl_http2_setup(struct connectdata *conn);
int Curl_http2_switched(struct connectdata *conn);
CURLcode Curl_http2_switched(struct connectdata *conn);
#else /* USE_NGHTTP2 */
#define Curl_http2_init(x) CURLE_UNSUPPORTED_PROTOCOL
#define Curl_http2_send_request(x) CURLE_UNSUPPORTED_PROTOCOL
#define Curl_http2_request_upgrade(x,y) CURLE_UNSUPPORTED_PROTOCOL
#define Curl_http2_setup(x) CURLE_UNSUPPORTED_PROTOCOL
#define Curl_http2_switched(x) (-1)
#define Curl_http2_switched(x) CURLE_UNSUPPORTED_PROTOCOL
#endif
#endif /* HEADER_CURL_HTTP2_H */

4
lib/strerror.c
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@ -105,6 +105,9 @@ curl_easy_strerror(CURLcode error)
case CURLE_FTP_CANT_GET_HOST:
return "FTP: can't figure out the host in the PASV response";
case CURLE_HTTP2:
return "Error in the HTTP2 framing layer";
case CURLE_FTP_COULDNT_SET_TYPE:
return "FTP: couldn't set file type";
@ -296,7 +299,6 @@ curl_easy_strerror(CURLcode error)
return "The max connection limit is reached";
/* error codes not used by current libcurl */
case CURLE_OBSOLETE16:
case CURLE_OBSOLETE20:
case CURLE_OBSOLETE24:
case CURLE_OBSOLETE29: