Hello, all As we know, in Linux kernel 2.6.4, the file /proc/net/tcp contains a lot of data information about the tcp connection of the network, but it doesnât contain the information about the size of receive window and send window. I think the information is useful. For example, I can modify the command netstat and make it display these information, and in fact, after modifying the kernel I modified this command immediately and it can display these information rightly. I will send the netstat patch to Bernd Eckenfels (The man page and the command included in the net-tools package is totally rewritten by him), I think if you adopt my idea, he will also adopt my idea about netstat. I modified the file /net/ipv4/tcp_ipv4.c, so that it can provide the information about the size of receive window and send window for the /proc/net/tcp. After my work, one line in the /proc/net/tcp may look like this: 0: 00000000:0400 00000000:0000 0A 00000000:00000000 00:00000000 00000000 29 0 1899 1 c11e4084 3000 0 0 2 -1:87380 16384 the last two fields are the size of receive window and send window in bytes. The attachment is my patch. Usage: patch âp0 < tcp_ip.patch. diff -Nur linux-2.6.4/net/ipv4/tcp_ipv4.c linux-2.6.4/net/ipv4/tcp_ipv4.c --- linux-2.6.4/net/ipv4/tcp_ipv4.c 2004-03-10 21:55:25.000000000 -0500 +++ linux-2.6.4/net/ipv4/tcp_ipv4.c 2004-04-07 21:12:12.000000000 -0400 @@ -2527,7 +2527,7 @@ } sprintf(tmpbuf, "%4d: %08X:%04X %08X:%04X %02X %08X:%08X %02X:%08lX " - "%08X %5d %8d %lu %d %p %u %u %u %u %d", + "%08X %5d %8d %lu %d %p %u %u %u %u %d:%d %d", i, src, srcp, dest, destp, sp->sk_state, tp->write_seq - tp->snd_una, tp->rcv_nxt - tp->copied_seq, timer_active, @@ -2539,7 +2539,8 @@ atomic_read(&sp->sk_refcnt), sp, tp->rto, tp->ack.ato, (tp->ack.quick << 1) | tp->ack.pingpong, tp->snd_cwnd, - tp->snd_ssthresh >= 0xFFFF ? -1 : tp->snd_ssthresh); + tp->snd_ssthresh >= 0xFFFF ? -1 : tp->snd_ssthresh, + sp->sk_rcvbuf,sp->sk_sndbuf); } static void get_timewait4_sock(struct tcp_tw_bucket *tw, char *tmpbuf, int i) Would you mind considering my suggestion? Regards Yu Zhiguo -------------------------------------------------- Dept. of Technology and Development, Nanjing Fujitsu Nanda Software Tech. Co., Ltd.(FNST) No.16-5, Guangzhou Rd., Nanjing, P.R. China PHONEï+86+25-6630523-653 FUJITSU INTERNALï79955653 FAXï+86+25-3317685 Mailïyuzg@nanjing-fnst.com -------------------------------------------------- - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
