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RESTCONF HTTP/1 Incomplete header handling

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This commit is contained in:
Olof hagsand 2022-02-09 10:10:52 +01:00
parent 51fd973642
commit abaf122bfc
4 changed files with 47 additions and 21 deletions
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53
apps/restconf/restconf_native.c
View file

@ -441,6 +441,32 @@ native_send_badrequest(clicon_handle h,
return retval;
}
#ifdef HAVE_HTTP1
/*! Clear all input stream data if input is interrupted for some reason
*
* Only used by HTTP/1.
* @param[in] h Clixon handle
* @param[in] sd Http stream
* @retval 0 OK
* @retval -1 Error
*/
static int
native_clear_input(clicon_handle h,
restconf_stream_data *sd)
{
int retval = -1;
cbuf_reset(sd->sd_indata);
if (sd->sd_qvec)
cvec_free(sd->sd_qvec);
if (restconf_param_del_all(h) < 0)
goto done;
retval = 0;
done:
return retval;
}
#endif
/*! New data connection after accept, receive and reply on data socket
*
* @param[in] s Socket where message arrived. read from this.
@ -461,7 +487,7 @@ restconf_connection(int s,
int retval = -1;
restconf_conn *rc = NULL;
ssize_t n;
char buf[BUFSIZ]; /* from stdio.h, typically 8K. 256 fails some tests*/
char buf[1024]; /* Alter BUFSIZ (8K) from stdio.h 8K. 256 fails some tests */
char *totbuf = NULL;
size_t totlen = 0;
int readmore = 1;
@ -561,6 +587,15 @@ restconf_connection(int s,
memcpy(&totbuf[totlen-n], buf, n);
totbuf[totlen] = '\0';
if (clixon_http1_parse_string(h, rc, totbuf) < 0){
/* Maybe only for non-ssl ? */
if ((ret = clixon_event_poll(rc->rc_s)) < 0)
goto done;
if (ret == 1){
if (native_clear_input(h, sd) < 0)
goto done;
readmore++;
continue;
}
if (native_send_badrequest(h, rc->rc_s, rc->rc_ssl, "application/yang-data+xml",
"<errors xmlns=\"urn:ietf:params:xml:ns:yang:ietf-restconf\"><error><error-type>protocol</error-type><error-tag>malformed-message</error-tag><error-message>The requested URL or a header is in some way badly formed</error-message></error></errors>") < 0)
goto done;
@ -587,21 +622,9 @@ restconf_connection(int s,
if ((ret = http1_check_readmore(h, sd)) < 0)
goto done;
if (ret == 0){
readmore++;
#if 1
/* Clear all stream data if reading more
* Alternative would be to not adding new data to totbuf ^
* and just append to sd->sd_indata but that would assume
* all headers read on first round. But that cant be done withut
* some probing on the socket if there is more data since it
* would hang on read otherwise
*/
cbuf_reset(sd->sd_indata);
if (sd->sd_qvec)
cvec_free(sd->sd_qvec);
if (restconf_param_del_all(h) < 0)
if (native_clear_input(h, sd) < 0)
goto done;
#endif
readmore++;
continue;
}
if (restconf_http1_path_root(h, rc) < 0)

1
test/fuzz/http1/README.md
View file

@ -21,6 +21,7 @@ main function and replacing it with the unit testing `main`:
Build and install clixon libraries and restconf statically
```
./configure LINKAGE=static INSTALLFLAGS="" CC=/usr/bin/afl-clang-fast
make clean
make
sudo make install
./runfuzz.sh

3
test/test_restconf_continue.sh
View file

@ -79,13 +79,12 @@ fi
new "wait restconf"
wait_restconf
new "generate large request"
# Add large put, curl seems to create a Expect:100-continue after 1024 bytes
# Alt: add in file if nr=5000 reacts with "Argument list too long"
echo -n '{"example:table":{"parameter":[' > $fjson
nr=10000
nr=1000
for (( i=0; i<$nr; i++ )); do
if [ $i -ne 0 ]; then
echo -n ",

11
test/test_restconf_err.sh
View file

@ -218,7 +218,7 @@ if [ -n "$netcat" ]; then
# new "restconf try fuzz crash"
# expectpart "$(${netcat} 127.0.0.1 80 < ~/tmp/crashes/id:000000,sig:06,src:000493+000365,op:splice,rep:8)" 0 "HTTP/$HVER 400"
new "restconf GET initial datastore netcat"
new "netcat restconf GET initial datastore netcat"
expectpart "$(${netcat} 127.0.0.1 80 <<EOF
GET /restconf/data/example:a=0 HTTP/$HVER
Host: localhost
@ -227,7 +227,7 @@ Accept: application/yang-data+xml
EOF
)" 0 "HTTP/$HVER 200" "$XML"
new "restconf XYZ not found"
new "netcat restconf XYZ not found"
expectpart "$(${netcat} 127.0.0.1 80 <<EOF
XYZ /restconf/data/example:a=0 HTTP/$HVER
Host: localhost
@ -236,7 +236,7 @@ Accept: application/yang-data+xml
EOF
)" 0 "HTTP/$HVER 404"
new "restconf PUT not allowed"
new "netcat restconf PUT not allowed"
expectpart "$(${netcat} 127.0.0.1 80 <<EOF
PUT /.well-known/host-meta HTTP/$HVER
Host: localhost
@ -245,15 +245,18 @@ Accept: application/yang-data+xml
EOF
)" 0 "HTTP/$HVER 405" # nginx uses "method not allowed"
new "restconf GET wrong http version raw"
if false; then # XXX >50% does not work on docker alpine
new "netcat restconf GET wrong http version raw"
expectpart "$(${netcat} 127.0.0.1 80 <<EOF
GET /restconf/data/example:a=0 HTTP/a.1
Host: localhost
Accept: application/yang-data+xml
EOF
)" 0 "HTTP/$HVER 400" # native: '<error-tag>malformed-message</error-tag><error-message>The requested URL or a header is in some way badly formed</error-message>'
fi
fi # netcat Cannot get to work on all platforms
new "restconf XYZ not found"