diff --git a/src/backend.c b/src/backend.c
index e94c4c9..b2b7ba5 100644
--- a/src/backend.c
+++ b/src/backend.c
@@ -1399,13 +1399,13 @@
 	uint32_t addr;
 	char *p;
 
-	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
+	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
 		now_ms, __FUNCTION__,
 		s,
 		req,
 		req->rex, req->wex,
 		req->flags,
-		req->buf->i,
+		ci_data(req),
 		req->analysers);
 
 	if (s->flags & SF_ASSIGNED)
diff --git a/src/cli.c b/src/cli.c
index 0d3c95c..d028429 100644
--- a/src/cli.c
+++ b/src/cli.c
@@ -764,9 +764,9 @@
 	}
 
  out:
-	DPRINTF(stderr, "%s@%d: st=%d, rqf=%x, rpf=%x, rqh=%d, rqs=%d, rh=%d, rs=%d\n",
+	DPRINTF(stderr, "%s@%d: st=%d, rqf=%x, rpf=%x, rqh=%lu, rqs=%lu, rh=%lu, rs=%lu\n",
 		__FUNCTION__, __LINE__,
-		si->state, req->flags, res->flags, req->buf->i, req->buf->o, res->buf->i, res->buf->o);
+		si->state, req->flags, res->flags, ci_data(req), co_data(req), ci_data(res), co_data(res));
 }
 
 /* This is called when the stream interface is closed. For instance, upon an
diff --git a/src/flt_spoe.c b/src/flt_spoe.c
index 63482f5..73e8f62 100644
--- a/src/flt_spoe.c
+++ b/src/flt_spoe.c
@@ -2264,7 +2264,7 @@
 		    agent->id, __FUNCTION__, s,
 		    ((ctx->flags & SPOE_CTX_FL_FRAGMENTED) ? "last fragment of" : "unfragmented"),
 		    ctx->spoe_appctx, (agent->rt[tid].frame_size - FRAME_HDR_SIZE),
-		    p - ctx->buffer->p);
+		    p - b_head(&ctx->buffer));
 
 	b_set_data(&ctx->buffer, p - b_head(&ctx->buffer));
 	ctx->frag_ctx.curmsg = NULL;
diff --git a/src/proto_http.c b/src/proto_http.c
index 56035b9..6fa38dd 100644
--- a/src/proto_http.c
+++ b/src/proto_http.c
@@ -1613,13 +1613,13 @@
 	struct http_msg *msg = &txn->req;
 	struct hdr_ctx ctx;
 
-	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
+	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
 		now_ms, __FUNCTION__,
 		s,
 		req,
 		req->rex, req->wex,
 		req->flags,
-		req->buf.i,
+		ci_data(req),
 		req->analysers);
 
 	/* we're speaking HTTP here, so let's speak HTTP to the client */
@@ -3477,13 +3477,13 @@
 		goto return_prx_yield;
 	}
 
-	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
+	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
 		now_ms, __FUNCTION__,
 		s,
 		req,
 		req->rex, req->wex,
 		req->flags,
-		req->buf.i,
+		ci_data(req),
 		req->analysers);
 
 	/* just in case we have some per-backend tracking */
@@ -3749,13 +3749,13 @@
 		return 0;
 	}
 
-	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
+	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
 		now_ms, __FUNCTION__,
 		s,
 		req,
 		req->rex, req->wex,
 		req->flags,
-		req->buf.i,
+		ci_data(req),
 		req->analysers);
 
 	/*
@@ -4909,13 +4909,13 @@
 	struct http_msg *msg = &s->txn->req;
 	int ret;
 
-	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
+	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
 		now_ms, __FUNCTION__,
 		s,
 		req,
 		req->rex, req->wex,
 		req->flags,
-		req->buf.i,
+		ci_data(req),
 		req->analysers);
 
 	if (unlikely(msg->msg_state < HTTP_MSG_BODY))
@@ -5145,7 +5145,7 @@
 	int cur_idx;
 	int n;
 
-	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
+	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
 		now_ms, __FUNCTION__,
 		s,
 		rep,
@@ -5777,7 +5777,7 @@
 	struct cond_wordlist *wl;
 	enum rule_result ret = HTTP_RULE_RES_CONT;
 
-	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
+	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
 		now_ms, __FUNCTION__,
 		s,
 		rep,
@@ -6126,13 +6126,13 @@
 	struct http_msg *msg = &s->txn->rsp;
 	int ret;
 
-	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
+	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
 		now_ms, __FUNCTION__,
 		s,
 		res,
 		res->rex, res->wex,
 		res->flags,
-		res->buf.i,
+		ci_data(res),
 		res->analysers);
 
 	if (unlikely(msg->msg_state < HTTP_MSG_BODY))
diff --git a/src/stream.c b/src/stream.c
index 3687bd0..d07a928 100644
--- a/src/stream.c
+++ b/src/stream.c
@@ -851,13 +851,13 @@
 	struct stream_interface *si = &s->si[1];
 	struct channel *req = &s->req;
 
-	DPRINTF(stderr,"[%u] %s: sess=%p rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rqh=%d rqt=%d rph=%d rpt=%d cs=%d ss=%d\n",
+	DPRINTF(stderr,"[%u] %s: sess=%p rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rqh=%lu rqt=%lu rph=%lu rpt=%lu cs=%d ss=%d\n",
 		now_ms, __FUNCTION__,
 		s,
 		req, &s->res,
 		req->rex, s->res.wex,
 		req->flags, s->res.flags,
-		req->buf->i, req->buf->o, s->res.buf.i, s->res.buf.o, s->si[0].state, s->si[1].state);
+		ci_data(req), co_data(req), ci_data(&s->res), co_data(&s->res), s->si[0].state, s->si[1].state);
 
 	if (si->state == SI_ST_ASS) {
 		/* Server assigned to connection request, we have to try to connect now */
@@ -1046,13 +1046,13 @@
 {
 	struct stream_interface *si = &s->si[1];
 
-	DPRINTF(stderr,"[%u] %s: sess=%p rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rqh=%d rqt=%d rph=%d rpt=%d cs=%d ss=%d\n",
+	DPRINTF(stderr,"[%u] %s: sess=%p rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rqh=%lu rqt=%lu rph=%lu rpt=%lu cs=%d ss=%d\n",
 		now_ms, __FUNCTION__,
 		s,
 		&s->req, &s->res,
 		s->req.rex, s->res.wex,
 		s->req.flags, s->res.flags,
-		s->req.buf.i, s->req.buf.o, s->res.buf.i, s->res.buf.o, s->si[0].state, s->si[1].state);
+		ci_data(&s->req), co_data(&s->req), ci_data(&s->res), co_data(&s->res), s->si[0].state, s->si[1].state);
 
 	if (si->state != SI_ST_REQ)
 		return;
@@ -1195,13 +1195,13 @@
 	req->analysers &= ~an_bit;
 	req->analyse_exp = TICK_ETERNITY;
 
-	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
+	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
 		now_ms, __FUNCTION__,
 		s,
 		req,
 		req->rex, req->wex,
 		req->flags,
-		req->buf->i,
+		ci_data(req),
 		req->analysers);
 
 	/* now check whether we have some switching rules for this request */
@@ -1320,13 +1320,13 @@
 	struct session *sess = s->sess;
 	struct server_rule *rule;
 
-	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
+	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%lu analysers=%02x\n",
 		now_ms, __FUNCTION__,
 		s,
 		req,
 		req->rex, req->wex,
 		req->flags,
-		req->buf->i + req->buf->o,
+		c_data(req),
 		req->analysers);
 
 	if (!(s->flags & SF_ASSIGNED)) {
@@ -1370,13 +1370,13 @@
 	struct session *sess  = s->sess;
 	struct sticking_rule  *rule;
 
-	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
+	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
 		now_ms, __FUNCTION__,
 		s,
 		req,
 		req->rex, req->wex,
 		req->flags,
-		req->buf->i,
+		ci_data(req),
 		req->analysers);
 
 	list_for_each_entry(rule, &px->sticking_rules, list) {
@@ -1471,13 +1471,13 @@
 	int i;
 	int nbreq = s->store_count;
 
-	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
+	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
 		now_ms, __FUNCTION__,
 		s,
 		rep,
 		rep->rex, rep->wex,
 		rep->flags,
-		rep->buf->i,
+		ci_data(rep),
 		rep->analysers);
 
 	list_for_each_entry(rule, &px->storersp_rules, list) {
@@ -1800,14 +1800,14 @@
 	/* Check for connection closure */
 
 	DPRINTF(stderr,
-		"[%u] %s:%d: task=%p s=%p, sfl=0x%08x, rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rqh=%d rqt=%d rph=%d rpt=%d cs=%d ss=%d, cet=0x%x set=0x%x retr=%d\n",
+		"[%u] %s:%d: task=%p s=%p, sfl=0x%08x, rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rqh=%lu rqt=%lu rph=%lu rpt=%lu cs=%d ss=%d, cet=0x%x set=0x%x retr=%d\n",
 		now_ms, __FUNCTION__, __LINE__,
 		t,
 		s, s->flags,
 		req, res,
 		req->rex, res->wex,
 		req->flags, res->flags,
-		req->buf->i, req->buf->o, res->buf->i, res->buf->o, si_f->state, si_b->state,
+		ci_data(req), co_data(req), ci_data(res), co_data(res), si_f->state, si_b->state,
 		si_f->err_type, si_b->err_type,
 		si_b->conn_retries);
 
diff --git a/src/tcp_rules.c b/src/tcp_rules.c
index 1b48ded..564b1ea 100644
--- a/src/tcp_rules.c
+++ b/src/tcp_rules.c
@@ -103,13 +103,13 @@
 	int partial;
 	int act_flags = 0;
 
-	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
+	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
 		now_ms, __FUNCTION__,
 		s,
 		req,
 		req->rex, req->wex,
 		req->flags,
-		req->buf->i,
+		ci_data(req),
 		req->analysers);
 
 	/* We don't know whether we have enough data, so must proceed
@@ -279,13 +279,13 @@
 	int partial;
 	int act_flags = 0;
 
-	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
+	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
 		now_ms, __FUNCTION__,
 		s,
 		rep,
 		rep->rex, rep->wex,
 		rep->flags,
-		rep->buf->i,
+		ci_data(rep),
 		rep->analysers);
 
 	/* We don't know whether we have enough data, so must proceed