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我想通過send()和recv()發送套接字TCP。爲了測試,我發送了一個38字節的小文本文件。我收到使用此文件:Recv()沒有得到EOF?
char * b = (char *)malloc(chunk + 2);
while (size > 0) {
memset(b, 0, chunk);
if (chunk > size) {
chunk = size;
}
if (size == total_size) {
gettimeofday(&tvB, NULL);
}
bytes_read = recv(ptr->sock, b, chunk, MSG_WAITALL);
if (bytes_read < 0) {
printf("ERROR: READ\n\n");
break;
}
if (bytes_read == 0) break;
int err = fwrite(b, sizeof(char), bytes_read, fp);
if (err <= 0) {
printf("ERROR: FWRITE\n\n");
break;
}
size -= bytes_read;
printf("SIZE: %d bytes_read = %d CHUNK: %d\n\n", size, bytes_read, chunk);
printf("TotalSize - size %d\n\n", total_size - size);
}
fclose(fp);
gettimeofday(&tvA, NULL);
我的發送方和:
char * c = (char *)malloc(transfer_size + 2);
while (bytes_to_send > 0) {
if (transfer_size > bytes_to_send) {
transfer_size = bytes_to_send;
}
size_t t = fread(c, 1, transfer_size, fp);
if (bytes_to_send == total_size) {
gettimeofday(&tvB, NULL);
}
bytes_sent = send(n->sock, c, transfer_size, 1);
if (bytes_sent <=0) {
// error
printf("SENDING ERROR\n\n");
break;
}
bytes_to_send -= bytes_sent;
pos = total_size - bytes_to_send;
printf("bytes_sent: %d bytes_to_send: %d\n\n", bytes_sent, bytes_to_send);
fseek(fp, pos, SEEK_SET);
memset(c, 0, transfer_size * sizeof(char));
}
我的問題是,recv的是
A.)沒有得到我所發送的文件的最後一個字節,並且
B.)每次都沒有收到整個「塊」,即使send已經發送了所有內容。
有關更多信息,請參閱運行小文件傳輸的輸出。
接收方:
Size: 38, Filename: hi.txt
SIZE: 1 bytes_read = 37 CHUNK: 38
TotalSize - size 37
發送方:
bytes_sent: 38 bytes_to_send: 0
Successfully sent hi.txt to dest
我知道,這就是爲什麼我把它放在一個循環中,並通過每個循環的recv()讀取的字節數減少剩餘的字節來讀取。 –