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Re: [lwip-users] netconn_recv partial data

From: N.Karakotas
Subject: Re: [lwip-users] netconn_recv partial data
Date: Sat, 21 Jan 2012 00:35:43 +0200
Hi,
 
Here is the debug output. Is data coming in faster than im processing?
 
netif_set_ipaddr: netif address being changed
netif: IP address of interface 192.168.5.16
netif: netmask of interface 255.255.255.0
netif: GW address of interface 192.168.5.1
netif: added interface em IP addr 192.168.5.16 netmask 255.255.255.0 gw 192.168.5.1
tcpip_thread: PACKET 0x10001530
tcpip_thread: PACKET 0x100014f0
tcpip_thread: PACKET 0x10001530
ip_input: iphdr->dest 0x1005a8c0 netif->ip_addr 0x1005a8c0 (0x5a8c0, 0x5a8c0, 0x10000000)
ip_input: packet not for us.
ip_route: No route to 192.168.5.16
ip_forward: no forwarding route for 192.168.5.16 found
tcpip_thread: PACKET 0x100014f0
netif: setting default interface em
tcpip_thread: PACKET 0x100014f0
tcpip_thread: PACKET 0x10001530
tcpip_thread: PACKET 0x100014b0
tcpip_thread: PACKET 0x100014f0
tcpip_thread: API message 0x1000410c
tcpip_thread: PACKET 0x100014f0
tcpip_thread: API message 0x1000410c
tcp_bind: bind to port 8080
tcpip_thread: API message 0x1000410c
tcpip_thread: PACKET 0x100014f0
tcpip_thread: API message 0x100040dc
netif_find: found em
tcpip_thread: API message 0x10004094
tcp_bind: bind to port 49153
tcpip_thread: API message 0x10004094
tcp_connect to port 80
inet_chksum_pseudo(): checksumming pbuf 0x10005b58 (has next 0x0)
inet_chksum_pseudo(): pbuf chain lwip_chksum()=a7d7
ip_output_if: em0
IP header:
+-------------------------------+
| 4 | 5 |  0x00 |        44     | (v, hl, tos, len)
+-------------------------------+
|        0      |000|       0   | (id, flags, offset)
+-------------------------------+
|  255  |    6  |    0x3008     | (ttl, proto, chksum)
+-------------------------------+
|  192  |  168  |    5  |   16  | (src)
+-------------------------------+
|  192  |  168  |    5  |   99  | (dest)
+-------------------------------+
netif->output()tcpip_thread: PACKET 0x100014f0
tcpip_thread: PACKET 0x100014b0
tcpip_thread: PACKET 0x10001530
tcpip_thread: PACKET 0x10001470
tcpip_thread: PACKET 0x10001430
ip_input: iphdr->dest 0x1005a8c0 netif->ip_addr 0x1005a8c0 (0x5a8c0, 0x5a8c0, 0x10000000)
ip_input: packet accepted on interface em
ip_input:
IP header:
+-------------------------------+
| 4 | 5 |  0x00 |        40     | (v, hl, tos, len)
+-------------------------------+
|    37013      |010|       0   | (id, flags, offset)
+-------------------------------+
|   64  |    6  |    0x1e77     | (ttl, proto, chksum)
+-------------------------------+
|  192  |  168  |    5  |   99  | (src)
+-------------------------------+
|  192  |  168  |    5  |   16  | (dest)
+-------------------------------+
ip_input: p->len 40 p->tot_len 40
TCP header:
+-------------------------------+
|       80      |    49153      | (src port, dest port)
+-------------------------------+
|           2333605984          | (seq no)
+-------------------------------+
|           0000006624          | (ack no)
+-------------------------------+
|  5 |   |010000|      5840     | (hdrlen, flags (ACK
), win)
+-------------------------------+
|    0xa796     |         0     | (chksum, urgp)
+-------------------------------+
inet_chksum_pseudo(): checksumming pbuf 0x100026a8 (has next 0x0)
inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
+-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags ACK
-+-+-+-+-+-+-+-+-+-+-+-+-+-+
State: SYN_SENT
SYN-SENT: ackno 6624 pcb->snd_nxt 6510 unacked 6509
inet_chksum_pseudo(): checksumming pbuf 0x10005bac (has next 0x0)
inet_chksum_pseudo(): pbuf chain lwip_chksum()=9d49
ip_output_if: em0
IP header:
+-------------------------------+
| 4 | 5 |  0x00 |        40     | (v, hl, tos, len)
+-------------------------------+
|        1      |000|       0   | (id, flags, offset)
+-------------------------------+
|  255  |    6  |    0x300b     | (ttl, proto, chksum)
+-------------------------------+
|  192  |  168  |    5  |   16  | (src)
+-------------------------------+
|  192  |  168  |    5  |   99  | (dest)
+-------------------------------+
netif->output()State: SYN_SENT
tcpip_thread: PACKET 0x100014f0
tcpip_thread: PACKET 0x10001470
tcpip_thread: PACKET 0x10001530
tcpip_thread: PACKET 0x100014b0
tcpip_thread: PACKET 0x100013f0
tcpip_thread: PACKET 0x100013b0
tcpip_thread: PACKET 0x10001370
tcpip_thread: PACKET 0x10001430
tcpip_thread: PACKET 0x10001530
tcpip_thread: PACKET 0x10001470
tcpip_thread: PACKET 0x100013f0
tcpip_thread: PACKET 0x100013f0
tcp_slowtmr: processing active pcb
tcpip_thread: PACKET 0x100013f0
tcpip_thread: PACKET 0x10001470
tcpip_thread: PACKET 0x100013f0
tcpip_thread: PACKET 0x10001470
tcpip_thread: PACKET 0x10001470
tcpip_thread: PACKET 0x100013f0
tcp_slowtmr: processing active pcb
tcpip_thread: PACKET 0x100013f0
tcpip_thread: PACKET 0x100013f0
tcpip_thread: PACKET 0x100013f0
tcpip_thread: PACKET 0x10001470
tcpip_thread: PACKET 0x10001470
tcp_slowtmr: processing active pcb
tcpip_thread: PACKET 0x10001470
tcpip_thread: PACKET 0x100013f0
tcpip_thread: PACKET 0x100013f0
tcpip_thread: PACKET 0x10001470
tcpip_thread: PACKET 0x100013f0
tcp_slowtmr: processing active pcb
tcp_slowtmr: polling application
tcpip_thread: PACKET 0x100013f0
tcpip_thread: PACKET 0x100013f0
tcpip_thread: PACKET 0x100013f0
tcp_slowtmr: processing active pcb
tcpip_thread: PACKET 0x100013f0
tcpip_thread: PACKET 0x100013f0
tcpip_thread: PACKET 0x100013f0
tcpip_thread: PACKET 0x10001470
tcp_slowtmr: processing active pcb
inet_chksum_pseudo(): checksumming pbuf 0x10005b58 (has next 0x0)
inet_chksum_pseudo(): pbuf chain lwip_chksum()=a7d7
ip_output_if: em0
IP header:
+-------------------------------+
| 4 | 5 |  0x00 |        44     | (v, hl, tos, len)
+-------------------------------+
|        2      |000|       0   | (id, flags, offset)
+-------------------------------+
|  255  |    6  |    0x3006     | (ttl, proto, chksum)
+-------------------------------+
|  192  |  168  |    5  |   16  | (src)
+-------------------------------+
|  192  |  168  |    5  |   99  | (dest)
+-------------------------------+
netif->output()tcpip_thread: PACKET 0x10001470
tcpip_thread: PACKET 0x100013f0
tcpip_thread: PACKET 0x10001530
tcpip_thread: PACKET 0x10001430
tcpip_thread: PACKET 0x10001370
ip_input: iphdr->dest 0x1005a8c0 netif->ip_addr 0x1005a8c0 (0x5a8c0, 0x5a8c0, 0x10000000)
ip_input: packet accepted on interface em
ip_input:
IP header:
+-------------------------------+
| 4 | 5 |  0x00 |        44     | (v, hl, tos, len)
+-------------------------------+
|        0      |010|       0   | (id, flags, offset)
+-------------------------------+
|   64  |    6  |    0xaf08     | (ttl, proto, chksum)
+-------------------------------+
|  192  |  168  |    5  |   99  | (src)
+-------------------------------+
|  192  |  168  |    5  |   16  | (dest)
+-------------------------------+
ip_input: p->len 44 p->tot_len 44
TCP header:
+-------------------------------+
|       80      |    49153      | (src port, dest port)
+-------------------------------+
|           2823389896          | (seq no)
+-------------------------------+
|           0000006510          | (ack no)
+-------------------------------+
|  6 |   |010010|      5840     | (hdrlen, flags (SYN ACK
), win)
+-------------------------------+
|    0xf0b0     |         0     | (chksum, urgp)
+-------------------------------+
inet_chksum_pseudo(): checksumming pbuf 0x10001f94 (has next 0x0)
inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
+-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags SYN ACK
-+-+-+-+-+-+-+-+-+-+-+-+-+-+
State: SYN_SENT
tcp_parseopt: MSS
SYN-SENT: ackno 6510 pcb->snd_nxt 6510 unacked 6509
inet_chksum_pseudo(): checksumming pbuf 0x10005b58 (has next 0x0)
inet_chksum_pseudo(): pbuf chain lwip_chksum()=c1e8
ip_output_if: em0
IP header:
+-------------------------------+
| 4 | 5 |  0x00 |        40     | (v, hl, tos, len)
+-------------------------------+
|        3      |000|       0   | (id, flags, offset)
+-------------------------------+
|  255  |    6  |    0x3009     | (ttl, proto, chksum)
+-------------------------------+
|  192  |  168  |    5  |   16  | (src)
+-------------------------------+
|  192  |  168  |    5  |   99  | (dest)
+-------------------------------+
netif->output()State: ESTABLISHED
tcpip_thread: PACKET 0x10001530
tcpip_thread: PACKET 0x10001430
tcpip_thread: PACKET 0x100013f0
tcpip_thread: PACKET 0x10001470
tcpip_thread: PACKET 0x100013b0
tcpip_thread: PACKET 0x100014b0
tcpip_thread: PACKET 0x100014f0
tcpip_thread: PACKET 0x100013f0
tcpip_thread: PACKET 0x10001430
tcpip_thread: PACKET 0x100014b0
tcpip_thread: API message 0x10004094
inet_chksum_pseudo(): checksumming pbuf 0x10005b58 (has next 0x0)
inet_chksum_pseudo(): pbuf chain lwip_chksum()=c232
ip_output_if: em0
IP header:
+-------------------------------+
| 4 | 5 |  0x00 |       154     | (v, hl, tos, len)
+-------------------------------+
|        4      |000|       0   | (id, flags, offset)
+-------------------------------+
|  255  |    6  |    0x2f96     | (ttl, proto, chksum)
+-------------------------------+
|  192  |  168  |    5  |   16  | (src)
+-------------------------------+
|  192  |  168  |    5  |   99  | (dest)
+-------------------------------+
netif->output()tcpip_thread: PACKET 0x100014b0
tcpip_thread: PACKET 0x10001430
tcpip_thread: PACKET 0x100013f0
tcpip_thread: PACKET 0x100014f0
ip_input: iphdr->dest 0x1005a8c0 netif->ip_addr 0x1005a8c0 (0x5a8c0, 0x5a8c0, 0x10000000)
ip_input: packet accepted on interface em
ip_input:
IP header:
+-------------------------------+
| 4 | 5 |  0x00 |        40     | (v, hl, tos, len)
+-------------------------------+
|    39996      |010|       0   | (id, flags, offset)
+-------------------------------+
|   64  |    6  |    0x12d0     | (ttl, proto, chksum)
+-------------------------------+
|  192  |  168  |    5  |   99  | (src)
+-------------------------------+
|  192  |  168  |    5  |   16  | (dest)
+-------------------------------+
ip_input: p->len 40 p->tot_len 40
TCP header:
+-------------------------------+
|       80      |    49153      | (src port, dest port)
+-------------------------------+
|           2823389897          | (seq no)
+-------------------------------+
|           0000006624          | (ack no)
+-------------------------------+
|  5 |   |010000|      5840     | (hdrlen, flags (ACK
), win)
+-------------------------------+
|    0x07fc     |         0     | (chksum, urgp)
+-------------------------------+
inet_chksum_pseudo(): checksumming pbuf 0x10002dbc (has next 0x0)
inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
+-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags ACK
-+-+-+-+-+-+-+-+-+-+-+-+-+-+
State: ESTABLISHED
tcp_receive: ACK for 6624, unacked->seqno 6510:6624
tcp_receive: removing 6510:6624 from pcb->unacked
State: ESTABLISHED
tcpip_thread: PACKET 0x100013b0
ip_input: iphdr->dest 0x1005a8c0 netif->ip_addr 0x1005a8c0 (0x5a8c0, 0x5a8c0, 0x10000000)
ip_input: packet accepted on interface em
ip_input:
IP header:
+-------------------------------+
| 4 | 5 |  0x00 |       305     | (v, hl, tos, len)
+-------------------------------+
|    39997      |010|       0   | (id, flags, offset)
+-------------------------------+
|   64  |    6  |    0x11c6     | (ttl, proto, chksum)
+-------------------------------+
|  192  |  168  |    5  |   99  | (src)
+-------------------------------+
|  192  |  168  |    5  |   16  | (dest)
+-------------------------------+
ip_input: p->len 305 p->tot_len 305
TCP header:
+-------------------------------+
|       80      |    49153      | (src port, dest port)
+-------------------------------+
|           2823389897          | (seq no)
+-------------------------------+
|           0000006624          | (ack no)
+-------------------------------+
|  5 |   |011000|      5840     | (hdrlen, flags (PSH ACK
), win)
+-------------------------------+
|    0x1534     |         0     | (chksum, urgp)
+-------------------------------+
inet_chksum_pseudo(): checksumming pbuf 0x100021f0 (has next 0x0)
inet_chksum_pseudo(): pbuf chain lwip_chksum()=ffff
+-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags PSH ACK
-+-+-+-+-+-+-+-+-+-+-+-+-+-+
State: ESTABLISHED
State: ESTABLISHED
tcpip_thread: PACKET 0x10001470
ip_input: iphdr->dest 0x1005a8c0 netif->ip_addr 0x1005a8c0 (0x5a8c0, 0x5a8c0, 0x10000000)
ip_input: packet accepted on interface em
ip_input:
IP header:
+-------------------------------+
| 4 | 5 |  0x00 |      1064     | (v, hl, tos, len)
+-------------------------------+
|    39998      |010|       0   | (id, flags, offset)
+-------------------------------+
|   64  |    6  |    0x0ece     | (ttl, proto, chksum)
+-------------------------------+
|  192  |  168  |    5  |   99  | (src)
+-------------------------------+
|  192  |  168  |    5  |   16  | (dest)
+-------------------------------+
ip_input: p->len 498 p->tot_len 1064
TCP header:
+-------------------------------+
|       80      |    49153      | (src port, dest port)
+-------------------------------+
|           2823390162          | (seq no)
+-------------------------------+
|           0000006624          | (ack no)
+-------------------------------+
|  5 |   |010000|      5840     | (hdrlen, flags (ACK
), win)
+-------------------------------+
|    0x693c     |         0     | (chksum, urgp)
+-------------------------------+
inet_chksum_pseudo(): checksumming pbuf 0x10003018 (has next 0x10002904)
inet_chksum_pseudo(): checksumming pbuf 0x10002904 (has next 0x10001f94)
inet_chksum_pseudo(): checksumming pbuf 0x10001f94 (has next 0x0)
inet_chksum_pseudo(): pbuf chain lwip_chksum()=4cc
inet_chksum_pseudo(): checksumming pbuf 0x10003018 (has next 0x10002904)
inet_chksum_pseudo(): checksumming pbuf 0x10002904 (has next 0x10001f94)
inet_chksum_pseudo(): checksumming pbuf 0x10001f94 (has next 0x0)
inet_chksum_pseudo(): pbuf chain lwip_chksum()=4cc
tcp_input: packet discarded due to failing checksum 0xfb33
TCP header:
+-------------------------------+
|       80      |    49153      | (src port, dest port)
+-------------------------------+
|           2823390162          | (seq no)
+-------------------------------+
|           0000006624          | (ack no)
+-------------------------------+
|  5 |   |010000|      5840     | (hdrlen, flags (ACK
), win)
+-------------------------------+
|    0x693c     |         0     | (chksum, urgp)
+-------------------------------+
tcpip_thread: PACKET 0x100013f0
tcpip_thread: PACKET 0x10001430
tcpip_thread: PACKET 0x100014b0
tcpip_thread: PACKET 0x100014f0
tcpip_thread: API message 0x100040b4
tcp_recved: recveived 265 bytes, wnd 2048 (0).
 
Sent: Saturday, January 21, 2012 12:00 AM
Subject: Re: [lwip-users] netconn_recv partial data
 
Hi,
 
The following code gets stuck on the second netconn_recv.
 
    resp = netconn_recv(conn,&inbuf) ;
    netbuf_data(inbuf, (void*)&data, &buflen);
    printf("%d\r\n",resp);
//    netbuf_next(inbuf);
    resp = netconn_recv(conn,&inbuf) ;
    netbuf_data(inbuf, (void*)&data, &buflen);
 
Nick

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