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"UDP C размер принятого пакета" Отправлено youran, 31-Дек-18 15:36
Есть некий код #include<stdio.h>    //printf #include<string.h> //memset #include<stdlib.h> //exit(0); #include<arpa/inet.h> #include<sys/socket.h> #define SERVER "127.0.0.1" #define BUFLEN 512    //Max length of buffer #define PORT 8888    //The port on which to send data void die(char *s) {     perror(s);     exit(1); } int main(void) {     struct sockaddr_in si_other;     int s, i, slen=sizeof(si_other);     char buf[BUFLEN];     char message[BUFLEN];     if ( (s=socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1)     {         die("socket");     }     memset((char *) &si_other, 0, sizeof(si_other));     si_other.sin_family = AF_INET;     si_other.sin_port = htons(PORT);          if (inet_aton(SERVER , &si_other.sin_addr) == 0)     {         fprintf(stderr, "inet_aton() failed\n");         exit(1);     }     while(1)     {         printf("Enter message : ");         gets(message);                  //send the message         if (sendto(s, message, strlen(message) , 0 , (struct sockaddr *) &si_other, slen)==-1)         {             die("sendto()");         }                  //receive a reply and print it         //clear the buffer by filling null, it might have previously received data         memset(buf,'\0', BUFLEN);         //try to receive some data, this is a blocking call         if (recvfrom(s, buf, BUFLEN, 0, (struct sockaddr *) &si_other, &slen) == -1)         {             die("recvfrom()");         }                  puts(buf);     }     close(s);     return 0; } Как определить размер принятого пакета функцией recvfrom() ?