diff --git a/hw/dp8393x.c b/hw/dp8393x.c
index 9257167b1f9733e511d75a2a867d566ea3cb0bd6..1b48d9684e070ea422a903c04625ecc1a8f405cf 100644
--- a/hw/dp8393x.c
+++ b/hw/dp8393x.c
@@ -409,7 +409,7 @@ static void do_transmit_packets(dp8393xState *s)
             s->regs[SONIC_TCR] |= SONIC_TCR_CRSL;
             if (s->vc->fd_can_read(s)) {
                 s->loopback_packet = 1;
-                s->vc->fd_read(s, s->tx_buffer, tx_len);
+                s->vc->receive(s, s->tx_buffer, tx_len);
             }
         } else {
             /* Transmit packet */
@@ -725,7 +725,7 @@ static int receive_filter(dp8393xState *s, const uint8_t * buf, int size)
     return -1;
 }
 
-static void nic_receive(void *opaque, const uint8_t * buf, int size)
+static void nic_receive(void *opaque, const uint8_t * buf, size_t size)
 {
     uint16_t data[10];
     dp8393xState *s = opaque;
diff --git a/hw/e1000.c b/hw/e1000.c
index 01ee57f03173e5ee3de544818f29baaea7ea4f72..20544d29436e46133461e29557d293e6de8b8cef 100644
--- a/hw/e1000.c
+++ b/hw/e1000.c
@@ -600,7 +600,7 @@ e1000_can_receive(void *opaque)
 }
 
 static void
-e1000_receive(void *opaque, const uint8_t *buf, int size)
+e1000_receive(void *opaque, const uint8_t *buf, size_t size)
 {
     E1000State *s = opaque;
     struct e1000_rx_desc desc;
@@ -614,8 +614,8 @@ e1000_receive(void *opaque, const uint8_t *buf, int size)
         return;
 
     if (size > s->rxbuf_size) {
-        DBGOUT(RX, "packet too large for buffers (%d > %d)\n", size,
-               s->rxbuf_size);
+        DBGOUT(RX, "packet too large for buffers (%lu > %d)\n",
+               (unsigned long)size, s->rxbuf_size);
         return;
     }
 
diff --git a/hw/eepro100.c b/hw/eepro100.c
index 5450b83f3670a3c4695f911715da337ad3597807..39e8fccfbc196e4d0503edc23ccc2e1e3b35c90a 100644
--- a/hw/eepro100.c
+++ b/hw/eepro100.c
@@ -1441,7 +1441,7 @@ static int nic_can_receive(void *opaque)
     //~ return !eepro100_buffer_full(s);
 }
 
-static void nic_receive(void *opaque, const uint8_t * buf, int size)
+static void nic_receive(void *opaque, const uint8_t * buf, size_t size)
 {
     /* TODO:
      * - Magic packets should set bit 30 in power management driver register.
diff --git a/hw/etraxfs_eth.c b/hw/etraxfs_eth.c
index bb612840c1b95db26f047cf2cb0862642615c6c7..2446f0dcb9e89fdb5c24efa24f556b7cef9b6d2c 100644
--- a/hw/etraxfs_eth.c
+++ b/hw/etraxfs_eth.c
@@ -501,7 +501,7 @@ static int eth_can_receive(void *opaque)
 	return 1;
 }
 
-static void eth_receive(void *opaque, const uint8_t *buf, int size)
+static void eth_receive(void *opaque, const uint8_t *buf, size_t size)
 {
 	unsigned char sa_bcast[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 	struct fs_eth *eth = opaque;
diff --git a/hw/mcf_fec.c b/hw/mcf_fec.c
index 86b3aafa6a2588012558978264c5ead9d1535534..0b0f17ade65136058c2542b46cd10c2190de983b 100644
--- a/hw/mcf_fec.c
+++ b/hw/mcf_fec.c
@@ -353,7 +353,7 @@ static int mcf_fec_can_receive(void *opaque)
     return s->rx_enabled;
 }
 
-static void mcf_fec_receive(void *opaque, const uint8_t *buf, int size)
+static void mcf_fec_receive(void *opaque, const uint8_t *buf, size_t size)
 {
     mcf_fec_state *s = (mcf_fec_state *)opaque;
     mcf_fec_bd bd;
diff --git a/hw/mipsnet.c b/hw/mipsnet.c
index 82a8c935a1f81500b4c357f48d168d8151200759..a22f49aabc4ba72c0ef9bc12a054555973b01852 100644
--- a/hw/mipsnet.c
+++ b/hw/mipsnet.c
@@ -75,7 +75,7 @@ static int mipsnet_can_receive(void *opaque)
     return !mipsnet_buffer_full(s);
 }
 
-static void mipsnet_receive(void *opaque, const uint8_t *buf, int size)
+static void mipsnet_receive(void *opaque, const uint8_t *buf, size_t size)
 {
     MIPSnetState *s = opaque;
 
diff --git a/hw/musicpal.c b/hw/musicpal.c
index fcefa6e32e52c9762f7ddecef73faf7d2a1c16eb..b7810ca7be322035e8bea2fe9f64575395b3f073 100644
--- a/hw/musicpal.c
+++ b/hw/musicpal.c
@@ -562,7 +562,7 @@ static int eth_can_receive(void *opaque)
     return 1;
 }
 
-static void eth_receive(void *opaque, const uint8_t *buf, int size)
+static void eth_receive(void *opaque, const uint8_t *buf, size_t size)
 {
     mv88w8618_eth_state *s = opaque;
     uint32_t desc_addr;
diff --git a/hw/ne2000.c b/hw/ne2000.c
index aea66b784f99af214cfb8b955322ab27c7112a7d..502c8ae6645414b2eb94aedb6073723775966d59 100644
--- a/hw/ne2000.c
+++ b/hw/ne2000.c
@@ -224,7 +224,7 @@ static int ne2000_can_receive(void *opaque)
 
 #define MIN_BUF_SIZE 60
 
-static void ne2000_receive(void *opaque, const uint8_t *buf, int size)
+static void ne2000_receive(void *opaque, const uint8_t *buf, size_t size)
 {
     NE2000State *s = opaque;
     uint8_t *p;
diff --git a/hw/pcnet.c b/hw/pcnet.c
index 5eba4672534f6d7dce9c4683fc8f944c5037ca82..4defc437b3c4cec7f0f7e5ab0d675d20c47edc4b 100644
--- a/hw/pcnet.c
+++ b/hw/pcnet.c
@@ -1076,7 +1076,7 @@ static int pcnet_can_receive(void *opaque)
 
 #define MIN_BUF_SIZE 60
 
-static void pcnet_receive(void *opaque, const uint8_t *buf, int size)
+static void pcnet_receive(void *opaque, const uint8_t *buf, size_t size)
 {
     PCNetState *s = opaque;
     int is_padr = 0, is_bcast = 0, is_ladr = 0;
diff --git a/hw/qdev.c b/hw/qdev.c
index 90b42532a5fe0de9d8efc9f1929d86b0c238c7b2..bab351c12fdc7e0ddfb411bfdd27d270970baaa7 100644
--- a/hw/qdev.c
+++ b/hw/qdev.c
@@ -258,16 +258,16 @@ void qdev_connect_gpio_out(DeviceState * dev, int n, qemu_irq pin)
 }
 
 VLANClientState *qdev_get_vlan_client(DeviceState *dev,
-                                      IOCanRWHandler *fd_can_read,
-                                      IOReadHandler *fd_read,
-                                      IOReadvHandler *fd_readv,
+                                      NetCanReceive *can_receive,
+                                      NetReceive *receive,
+                                      NetReceiveIOV *receive_iov,
                                       NetCleanup *cleanup,
                                       void *opaque)
 {
     NICInfo *nd = dev->nd;
     assert(nd);
-    return qemu_new_vlan_client(nd->vlan, nd->model, nd->name, fd_can_read,
-                                fd_read, fd_readv, cleanup, opaque);
+    return qemu_new_vlan_client(nd->vlan, nd->model, nd->name, can_receive,
+                                receive, receive_iov, cleanup, opaque);
 }
 
 
diff --git a/hw/rtl8139.c b/hw/rtl8139.c
index ab68bda8bfdcbf97cc51d0e98a4eee8c1831e75b..14119d476e30a374ccd03b3e3909cfeef30d5bb1 100644
--- a/hw/rtl8139.c
+++ b/hw/rtl8139.c
@@ -1158,7 +1158,7 @@ static void rtl8139_do_receive(void *opaque, const uint8_t *buf, int size, int d
     }
 }
 
-static void rtl8139_receive(void *opaque, const uint8_t *buf, int size)
+static void rtl8139_receive(void *opaque, const uint8_t *buf, size_t size)
 {
     rtl8139_do_receive(opaque, buf, size, 1);
 }
diff --git a/hw/smc91c111.c b/hw/smc91c111.c
index b20d535ee104065f04e73970e080df78e7563b43..6d1fbb32c219d3d318421a70e2833565f87653ae 100644
--- a/hw/smc91c111.c
+++ b/hw/smc91c111.c
@@ -602,7 +602,7 @@ static int smc91c111_can_receive(void *opaque)
     return 1;
 }
 
-static void smc91c111_receive(void *opaque, const uint8_t *buf, int size)
+static void smc91c111_receive(void *opaque, const uint8_t *buf, size_t size)
 {
     smc91c111_state *s = (smc91c111_state *)opaque;
     int status;
diff --git a/hw/stellaris_enet.c b/hw/stellaris_enet.c
index 8b7df099f0d7ab90d227365cdc36b019656be635..3ee9a8832cd6aab5f66c2550957fdbc4d58b8cee 100644
--- a/hw/stellaris_enet.c
+++ b/hw/stellaris_enet.c
@@ -78,7 +78,7 @@ static void stellaris_enet_update(stellaris_enet_state *s)
 }
 
 /* TODO: Implement MAC address filtering.  */
-static void stellaris_enet_receive(void *opaque, const uint8_t *buf, int size)
+static void stellaris_enet_receive(void *opaque, const uint8_t *buf, size_t size)
 {
     stellaris_enet_state *s = (stellaris_enet_state *)opaque;
     int n;
diff --git a/hw/usb-net.c b/hw/usb-net.c
index fda0aa5857b031ee3be0ab106904ecaace58d19e..693e9767d2cb5fe8605aaa1c35f1b2a6aee75c6c 100644
--- a/hw/usb-net.c
+++ b/hw/usb-net.c
@@ -1369,7 +1369,7 @@ static int usb_net_handle_data(USBDevice *dev, USBPacket *p)
     return ret;
 }
 
-static void usbnet_receive(void *opaque, const uint8_t *buf, int size)
+static void usbnet_receive(void *opaque, const uint8_t *buf, size_t size)
 {
     USBNetState *s = opaque;
     struct rndis_packet_msg_type *msg;
diff --git a/hw/virtio-net.c b/hw/virtio-net.c
index 561330825e5c26c63b69b551fcac1b8647c00648..3ca93f5872cc6ac295030a49a4037b975be2cfbd 100644
--- a/hw/virtio-net.c
+++ b/hw/virtio-net.c
@@ -361,7 +361,7 @@ static int receive_filter(VirtIONet *n, const uint8_t *buf, int size)
     return 0;
 }
 
-static void virtio_net_receive(void *opaque, const uint8_t *buf, int size)
+static void virtio_net_receive(void *opaque, const uint8_t *buf, size_t size)
 {
     VirtIONet *n = opaque;
     struct virtio_net_hdr_mrg_rxbuf *mhdr = NULL;
diff --git a/hw/xen_nic.c b/hw/xen_nic.c
index 350556e99074c22f2cc111a82ebb72a22b5f7ef8..0643e5787759dabacd4f7410f5860ebd676c810d 100644
--- a/hw/xen_nic.c
+++ b/hw/xen_nic.c
@@ -243,7 +243,7 @@ static int net_rx_ok(void *opaque)
     return 1;
 }
 
-static void net_rx_packet(void *opaque, const uint8_t *buf, int size)
+static void net_rx_packet(void *opaque, const uint8_t *buf, size_t size)
 {
     struct XenNetDev *netdev = opaque;
     netif_rx_request_t rxreq;
@@ -262,8 +262,8 @@ static void net_rx_packet(void *opaque, const uint8_t *buf, int size)
 	return;
     }
     if (size > XC_PAGE_SIZE - NET_IP_ALIGN) {
-	xen_be_printf(&netdev->xendev, 0, "packet too big (%d > %ld)",
-		      size, XC_PAGE_SIZE - NET_IP_ALIGN);
+	xen_be_printf(&netdev->xendev, 0, "packet too big (%lu > %ld)",
+		      (unsigned long)size, XC_PAGE_SIZE - NET_IP_ALIGN);
 	return;
     }
 
diff --git a/net.c b/net.c
index cc8cee3f1c6436ec0e3b322802926206067e43ef..515745d83a1b9a44e3126affd6987356680094ba 100644
--- a/net.c
+++ b/net.c
@@ -332,9 +332,9 @@ static char *assign_name(VLANClientState *vc1, const char *model)
 VLANClientState *qemu_new_vlan_client(VLANState *vlan,
                                       const char *model,
                                       const char *name,
-                                      IOCanRWHandler *fd_can_read,
-                                      IOReadHandler *fd_read,
-                                      IOReadvHandler *fd_readv,
+                                      NetCanReceive *can_receive,
+                                      NetReceive *receive,
+                                      NetReceiveIOV *receive_iov,
                                       NetCleanup *cleanup,
                                       void *opaque)
 {
@@ -345,9 +345,9 @@ VLANClientState *qemu_new_vlan_client(VLANState *vlan,
         vc->name = strdup(name);
     else
         vc->name = assign_name(vc, model);
-    vc->fd_can_read = fd_can_read;
-    vc->fd_read = fd_read;
-    vc->fd_readv = fd_readv;
+    vc->can_receive = can_receive;
+    vc->receive = receive;
+    vc->receive_iov = receive_iov;
     vc->cleanup = cleanup;
     vc->opaque = opaque;
     vc->vlan = vlan;
@@ -401,8 +401,8 @@ int qemu_can_send_packet(VLANClientState *sender)
             continue;
         }
 
-        /* no fd_can_read() handler, they can always receive */
-        if (!vc->fd_can_read || vc->fd_can_read(vc->opaque)) {
+        /* no can_receive() handler, they can always receive */
+        if (!vc->can_receive || vc->can_receive(vc->opaque)) {
             return 1;
         }
     }
@@ -416,7 +416,7 @@ qemu_deliver_packet(VLANClientState *sender, const uint8_t *buf, int size)
 
     for (vc = sender->vlan->first_client; vc != NULL; vc = vc->next) {
         if (vc != sender && !vc->link_down) {
-            vc->fd_read(vc->opaque, buf, size);
+            vc->receive(vc->opaque, buf, size);
         }
     }
 }
@@ -467,7 +467,7 @@ static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
         offset += len;
     }
 
-    vc->fd_read(vc->opaque, buffer, offset);
+    vc->receive(vc->opaque, buffer, offset);
 
     return offset;
 }
@@ -519,9 +519,9 @@ ssize_t qemu_sendv_packet(VLANClientState *sender, const struct iovec *iov,
             }
             if (vc->link_down) {
                 len = calc_iov_length(iov, iovcnt);
-            } else if (vc->fd_readv) {
-                len = vc->fd_readv(vc->opaque, iov, iovcnt);
-            } else if (vc->fd_read) {
+            } else if (vc->receive_iov) {
+                len = vc->receive_iov(vc->opaque, iov, iovcnt);
+            } else if (vc->receive) {
                 len = vc_sendv_compat(vc, iov, iovcnt);
             }
             max_len = MAX(max_len, len);
@@ -593,7 +593,7 @@ int slirp_is_inited(void)
     return slirp_inited;
 }
 
-static void slirp_receive(void *opaque, const uint8_t *buf, int size)
+static void slirp_receive(void *opaque, const uint8_t *buf, size_t size)
 {
 #ifdef DEBUG_SLIRP
     printf("slirp input:\n");
@@ -945,7 +945,7 @@ static ssize_t tap_receive_iov(void *opaque, const struct iovec *iov,
     return len;
 }
 
-static void tap_receive(void *opaque, const uint8_t *buf, int size)
+static void tap_receive(void *opaque, const uint8_t *buf, size_t size)
 {
     TAPState *s = opaque;
     int ret;
@@ -1380,7 +1380,7 @@ typedef struct NetSocketListenState {
 } NetSocketListenState;
 
 /* XXX: we consider we can send the whole packet without blocking */
-static void net_socket_receive(void *opaque, const uint8_t *buf, int size)
+static void net_socket_receive(void *opaque, const uint8_t *buf, size_t size)
 {
     NetSocketState *s = opaque;
     uint32_t len;
@@ -1390,7 +1390,7 @@ static void net_socket_receive(void *opaque, const uint8_t *buf, int size)
     send_all(s->fd, buf, size);
 }
 
-static void net_socket_receive_dgram(void *opaque, const uint8_t *buf, int size)
+static void net_socket_receive_dgram(void *opaque, const uint8_t *buf, size_t size)
 {
     NetSocketState *s = opaque;
     sendto(s->fd, buf, size, 0,
@@ -1831,7 +1831,7 @@ struct pcap_sf_pkthdr {
     uint32_t len;
 };
 
-static void dump_receive(void *opaque, const uint8_t *buf, int size)
+static void dump_receive(void *opaque, const uint8_t *buf, size_t size)
 {
     DumpState *s = opaque;
     struct pcap_sf_pkthdr hdr;
diff --git a/net.h b/net.h
index ab445aa2ec84e1ebb38db0274afbf019090212bb..4d204e06e6a808414d8d73f9be4c9261f09b0b2b 100644
--- a/net.h
+++ b/net.h
@@ -5,19 +5,20 @@
 
 /* VLANs support */
 
-typedef ssize_t (IOReadvHandler)(void *, const struct iovec *, int);
-
 typedef struct VLANClientState VLANClientState;
 
+typedef int (NetCanReceive)(void *);
+typedef void (NetReceive)(void *, const uint8_t *, size_t);
+typedef ssize_t (NetReceiveIOV)(void *, const struct iovec *, int);
 typedef void (NetCleanup) (VLANClientState *);
 typedef void (LinkStatusChanged)(VLANClientState *);
 
 struct VLANClientState {
-    IOReadHandler *fd_read;
-    IOReadvHandler *fd_readv;
+    NetReceive *receive;
+    NetReceiveIOV *receive_iov;
     /* Packets may still be sent if this returns zero.  It's used to
        rate-limit the slirp code.  */
-    IOCanRWHandler *fd_can_read;
+    NetCanReceive *can_receive;
     NetCleanup *cleanup;
     LinkStatusChanged *link_status_changed;
     int link_down;
@@ -51,9 +52,9 @@ VLANState *qemu_find_vlan(int id);
 VLANClientState *qemu_new_vlan_client(VLANState *vlan,
                                       const char *model,
                                       const char *name,
-                                      IOCanRWHandler *fd_can_read,
-                                      IOReadHandler *fd_read,
-                                      IOReadvHandler *fd_readv,
+                                      NetCanReceive *can_receive,
+                                      NetReceive *receive,
+                                      NetReceiveIOV *receive_iov,
                                       NetCleanup *cleanup,
                                       void *opaque);
 void qemu_del_vlan_client(VLANClientState *vc);
@@ -130,9 +131,9 @@ void net_host_device_remove(Monitor *mon, int vlan_id, const char *device);
 
 void qdev_get_macaddr(DeviceState *dev, uint8_t *macaddr);
 VLANClientState *qdev_get_vlan_client(DeviceState *dev,
-                                      IOCanRWHandler *fd_can_read,
-                                      IOReadHandler *fd_read,
-                                      IOReadvHandler *fd_readv,
+                                      NetCanReceive *can_receive,
+                                      NetReceive *receive,
+                                      NetReceiveIOV *receive_iov,
                                       NetCleanup *cleanup,
                                       void *opaque);
 
diff --git a/savevm.c b/savevm.c
index 248aea3edfa1cd1ff32197db94b355273594a9bf..6da5e73a9661600b604aed3c9578bedc1171c60e 100644
--- a/savevm.c
+++ b/savevm.c
@@ -131,7 +131,7 @@ static void qemu_announce_self_once(void *opaque)
         len = announce_self_create(buf, nd_table[i].macaddr);
         vlan = nd_table[i].vlan;
 	for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
-            vc->fd_read(vc->opaque, buf, len);
+            vc->receive(vc->opaque, buf, len);
         }
     }
     if (count--) {
diff --git a/tap-win32.c b/tap-win32.c
index 008158da16b9185aa0b9f5047ef100256c2a1c8e..ccf7e45e55b51fb4778c4b9311219d7bc74d50bf 100644
--- a/tap-win32.c
+++ b/tap-win32.c
@@ -650,7 +650,7 @@ static void tap_cleanup(VLANClientState *vc)
     qemu_free(s);
 }
 
-static void tap_receive(void *opaque, const uint8_t *buf, int size)
+static void tap_receive(void *opaque, const uint8_t *buf, size_t size)
 {
     TAPState *s = opaque;