Messages in this thread | | | Date | Tue, 13 Jul 1999 10:56:58 -0700 | From | Tracy Xiaodi Lu <> | Subject | UDP sendto/recvfrom error |
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Hi, I hope someone can help to tell me why I met this error. ------------------OK--------------- int client_len; int n=0; while(1) { if (n=recvfrom(sockfd,buffer,size,0,pclient_addr,&client_len))<=0) printf("error"); sendto(.....) } ------------------ recvfrom error----------- int n=0; int client_len; while(1) { if (n=recvfrom(sockfd,buffer,size,0,pclient_addr,&client_len))<=0) printf("error"); sendto(.....) } ------------------
I found if I declare the int client_len right before the while loop, the recvfrom fucntion will return the "Invalid Argument" (22) error. But it works fine if I declare one of more variable after client_len.
Thanks! I appreciate your help.
Tracy
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