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socks: handle premature close

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When expecting to receive a number of bytes during socks connect,
treat an early connection close as error.

Reported-by: Joshua Rogers
Closes #18883
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Stefan Eissing 2025-10-06 14:08:07 +02:00 • committed by Daniel Stenberg
parent 4a6bdd5899
commit 089afd78cb
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1 changed files with 7 additions and 1 deletions
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8
lib/socks.c
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@ -254,8 +254,14 @@ static CURLproxycode socks_recv(struct socks_state *sx,
curl_easy_strerror(result)); curl_easy_strerror(result));
return CURLPX_RECV_CONNECT; return CURLPX_RECV_CONNECT;
} }
else if(!nread) /* EOF */ else if(!nread) { /* EOF */
if(Curl_bufq_len(&sx->iobuf) < min_bytes) {
failf(data, "Failed to receive SOCKS response, "
"proxy closed connection");
return CURLPX_RECV_CONNECT;
}
break; break;
}
} }
*done = TRUE; *done = TRUE;
return CURLPX_OK; return CURLPX_OK;