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MINOR: filters: Forward data only if the last filter forwards something

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In flt_tcp_payload() and flt_http_payload(), if the last filter does not
forwarding anything, nothing is forwarded, not even the already filtered
data. For now, this patch is useless because the last filter is always sync with
the stream's offset. But it will be mandatory for a bugfix.
This commit is contained in:
Christopher Faulet 2020-02-07 16:40:33 +01:00
parent 727a3f1ca3
commit 71179a3ea9
1 changed files with 18 additions and 8 deletions
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22
src/filters.c
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@ -611,7 +611,7 @@ flt_http_payload(struct stream *s, struct http_msg *msg, unsigned int len)
struct filter *filter;
unsigned long long *strm_off = &FLT_STRM_OFF(s, msg->chn);
unsigned int out = co_data(msg->chn);
int ret = len - out;
int ret = 0, data = len - out;
DBG_TRACE_ENTER(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_FLT_ANA, s, s->txn, msg);
list_for_each_entry(filter, &strm_flt(s)->filters, list) {
@ -623,14 +623,19 @@ flt_http_payload(struct stream *s, struct http_msg *msg, unsigned int len)
unsigned int offset = *flt_off - *strm_off;
DBG_TRACE_DEVEL(FLT_ID(filter), STRM_EV_HTTP_ANA|STRM_EV_FLT_ANA, s);
ret = FLT_OPS(filter)->http_payload(s, filter, msg, out + offset, ret - offset);
ret = FLT_OPS(filter)->http_payload(s, filter, msg, out + offset, data - offset);
if (ret < 0)
goto end;
*flt_off += ret;
ret += offset;
data = ret + offset;
}
}
/* Only forward data if the last filter decides to forward something */
if (ret > 0) {
ret = data;
*strm_off += ret;
}
end:
DBG_TRACE_LEAVE(STRM_EV_STRM_ANA|STRM_EV_HTTP_ANA|STRM_EV_FLT_ANA, s);
return ret;
@ -861,7 +866,7 @@ flt_tcp_payload(struct stream *s, struct channel *chn, unsigned int len)
struct filter *filter;
unsigned long long *strm_off = &FLT_STRM_OFF(s, chn);
unsigned int out = co_data(chn);
int ret = len - out;
int ret = 0, data = len - out;
DBG_TRACE_ENTER(STRM_EV_TCP_ANA|STRM_EV_FLT_ANA, s);
list_for_each_entry(filter, &strm_flt(s)->filters, list) {
@ -873,14 +878,19 @@ flt_tcp_payload(struct stream *s, struct channel *chn, unsigned int len)
unsigned int offset = *flt_off - *strm_off;
DBG_TRACE_DEVEL(FLT_ID(filter), STRM_EV_TCP_ANA|STRM_EV_FLT_ANA, s);
ret = FLT_OPS(filter)->tcp_payload(s, filter, chn, out + offset, ret - offset);
ret = FLT_OPS(filter)->tcp_payload(s, filter, chn, out + offset, data - offset);
if (ret < 0)
goto end;
*flt_off += ret;
ret += offset;
data = ret + offset;
}
}
/* Only forward data if the last filter decides to forward something */
if (ret > 0) {
ret = data;
*strm_off += ret;
}
end:
DBG_TRACE_LEAVE(STRM_EV_TCP_ANA|STRM_EV_FLT_ANA, s);
return ret;