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Use evbuffer_pullup properly in fetch_from_evbuffer_socks_client.

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evbuffer_pullup does nothing and returns NULL if the caller asks it to
linearize more data than the buffer contains.

Introduced in 9796b9bfa6.

Reported by piebeer; fixed with help from doors.
This commit is contained in:
Robert Ransom 2010-12-29 05:11:29 -08:00
parent da91900135
commit 524fdeeb1e
1 changed files with 7 additions and 3 deletions
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10
src/or/buffers.c
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@ -1954,9 +1954,13 @@ fetch_from_evbuffer_socks_client(struct evbuffer *buf, int state,
size_t datalen; size_t datalen;
int r; int r;
data = evbuffer_pullup(buf, 128); /* Make sure we have at least 128 /* Linearize the SOCKS response in the buffer, up to 128 bytes.
* contiguous bytes if possible. */ * (parse_socks_client shouldn't need to see anything beyond that.) */
datalen = evbuffer_get_contiguous_space(buf); datalen = evbuffer_get_length(buf);
if (datalen > 128)
datalen = 128;
data = evbuffer_pullup(buf, datalen);
r = parse_socks_client(data, datalen, state, reason, &drain); r = parse_socks_client(data, datalen, state, reason, &drain);
if (drain > 0) if (drain > 0)
evbuffer_drain(buf, drain); evbuffer_drain(buf, drain);