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r15721@tombo: nickm | 2007-12-26 17:07:10 -0500

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Fix a nasty infinite loop in flush_buf[_tls].


svn:r12990
This commit is contained in:
Nick Mathewson 2007-12-26 22:07:14 +00:00
parent 27220fb395
commit 3a5bee150f
1 changed files with 15 additions and 6 deletions
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21
src/or/buffers.c
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@ -113,7 +113,7 @@ typedef struct chunk_freelist_t {
/** Static array of freelists, sorted by alloc_len, terminated by an entry
* with alloc_size of 0. */
/**XXXX020 tune these values. */
/**XXXX020 tune these values. And all allocation sizes, really. */
static chunk_freelist_t freelists[] = {
FL(256, 1024, 16), FL(512, 1024, 16), FL(1024, 512, 8), FL(4096, 256, 8),
FL(8192, 128, 4), FL(16384, 64, 4), FL(0, 0, 0)
@ -727,6 +727,8 @@ flush_buf(int s, buf_t *buf, size_t sz, size_t *buf_flushlen)
return r;
flushed += r;
sz -= r;
if (r == 0 || (size_t)r < flushlen0) /* can't flush any more now. */
break;
}
return flushed;
}
@ -767,6 +769,8 @@ flush_buf_tls(tor_tls_t *tls, buf_t *buf, size_t flushlen, size_t *buf_flushlen)
return r;
flushed += r;
sz -= r;
if (r == 0) /* Can't flush any more now. */
break;
} while (sz > 0);
return flushed;
}
@ -892,7 +896,8 @@ fetch_var_cell_from_buf(buf_t *buf, var_cell_t **out)
int
move_buf_to_buf(buf_t *buf_out, buf_t *buf_in, size_t *buf_flushlen)
{
/*XXXX020 we can do way better here. */
/* XXXX020 we can do way better here. See if this turns up in the
*/
char b[4096];
size_t cp, len;
len = *buf_flushlen;
@ -951,10 +956,13 @@ fetch_from_buf_http(buf_t *buf,
body = (char*) tor_memmem(buf->head->data, buf->head->datalen,
"\r\n\r\n", 4);
if (!body && buf->datalen > buf->head->datalen) {
buf_pullup(buf, max_headerlen, 1);
size_t len_scanned = buf->head->datalen;
buf_pullup(buf, max_headerlen, 0);
headers = buf->head->data;
/*XXX020 avoid searching the original part of the head chunk twice. */
body = (char*) tor_memmem(buf->head->data, buf->head->datalen,
/* avoid searching the original part of the head chunk twice. */
len_scanned = (len_scanned > 4) ? len_scanned - 4 : 0;
body = (char*) tor_memmem(buf->head->data + len_scanned,
buf->head->datalen - len_scanned,
"\r\n\r\n", 4);
}
@ -1383,7 +1391,8 @@ fetch_from_buf_line(buf_t *buf, char *data_out, size_t *data_len)
if (!buf->head)
return 0;
/* XXXX020 pull up less aggressively. */
/* XXXX020 pull up less aggressively. And implement setting *data_len
* properly in cases where we return -1. */
buf_pullup(buf, *data_len, 0);
cp = memchr(buf->head->data, '\n', buf->head->datalen);
if (!cp) {