Hello All, I am using LWIP stack (2.0.2) with pppos.I have NXP MC5748 board wi SIM900a interface with one UART channel.
I am trying to send data to server using LWIP socket programming. Steps of programming: 1. lwip_socket(PF_INET, SOCK_STREAM, 0); 2. lwip_connect(socket_fd,(struct sockaddr_in*)&sa,sizeof(struct sockaddr_in)); 3. lwip_write(socket_fd, "test", 4); 4. lwip_read(socket_fd, rxbuf, 512) and this above operations are working fine. But there is issue. Step 3 & 4 ie WRITE & READ are called in WHILE LOOP. after some number of successful write and read operations, code get stuck in read operation. So I have enabled some #define and put some console print, for debugging,. And my observation is following: 1. while successful operation, I was getting log as ip_input: iphdr->dest 0x646494b2 netif->ip_addr 0x646494b2 (0x646494b2, 0x646494b2, 0x0)ip4_input: packet accepted on interface pp 2. Getting this log, When read is not getting data : ip_input: iphdr->dest 0xb8482fbb netif->ip_addr 0x646494b2 (0xb8482fbb, 0x646494b2, 0x0)ip4_input: packet not for us. my further analysis is /* match packet against an interface, i.e. is this packet for us? */ if (ip4_addr_ismulticast(ip4_current_dest_addr())) in ip4.c When Issue occurs, IF conditions gets FAILED In unsuccessful opertion "ip_data.current_iphdr_dest.addr" is 0xb8482fbb And for successful operation it is 0x646494b2. Is above mentioned difference gives some kind of HINT ? I don't know much about lwip, So please help me to understand this issue and how to resolve it ? ThanksRahul
_______________________________________________ lwip-users mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/lwip-users
