On Thu, 2015-07-09 at 16:13 +0200, Miha Marolt wrote:
> Hi!
>
> I hope this is the right place to reports bugs. I apologize if it isn't.
>
> I have written a C program (see below for source code) that opens a raw
> socket on CentOS 7.1 Linux and binds it to some address (it doesn't use
> the port that I supplied, but that is not the point here). The "netstat"
> program correctly recognizes the socket as "raw", while "ss" program
> says it is "udp". Here are the relevant lines from the ss and netstat
> commands:
>
> $ netstat -an
> raw 0 0 127.0.0.1:6 0.0.0.0:* 7
>
> $ ./ss -an
> udp UNCONN 21569 0 127.0.0.1:6 *:*
>
> Here is the version information
>
> $ netstat --version # From CentOS 7.1.
> net-tools 2.10-alpha
>
> $ ./ss --version # Built from git.
> ss utility, iproute2-ss150626
>
>
> C source follows. If you store it in "main.c", then compile it with "$
> gcc main.c -o main" and then run it by executing "$ sudo ./main".
>
> #include <arpa/inet.h>
> #include <assert.h>
> #include <sys/socket.h>
> #include <stdio.h>
> #include <unistd.h>
>
>
> int main(void)
> {
> // Create a raw socket.
> int sock = socket(AF_INET, SOCK_RAW, IPPROTO_TCP);
> if (sock == -1) { perror(NULL); goto exc_cleanup; }
>
> // Bind socket to an address.
> struct sockaddr_in addr;
> addr.sin_family = AF_INET;
> inet_pton(AF_INET, "127.0.0.1", &addr.sin_addr);
> addr.sin_port = htons(27183);
>
> int rc = bind(sock, (struct sockaddr*)&addr, sizeof(addr));
> if (rc != 0) { perror(NULL); goto exc_cleanup; }
>
> // Wait until user presses <ENTER>.
> printf("\nPress <ENTER> to quit the program.\n");
> getchar();
>
> exc_cleanup:
> assert(!close(sock));
> }
It is indeed a raw socket on proto TCP.
Note sure if commit 8250bc9ff4e55a3ef397ed8c7612f1392d164295
was really good...
diff --git a/misc/ss.c b/misc/ss.c
index 03f92fa69270..dc61aaa79bca 100644
--- a/misc/ss.c
+++ b/misc/ss.c
@@ -2416,7 +2416,7 @@ static int dgram_show_line(char *line, const
struct filter *f, int family)
if (n < 9)
opt[0] = 0;
- inet_stats_print(&s, IPPROTO_UDP);
+ inet_stats_print(&s, atoi(line));
if (show_details && opt[0])
printf(" opt:\"%s\"", opt);
->
# ./ss -an | grep 127.0.0.1
tcp UNCONN 213486 0 127.0.0.1:6 *:*
If I checkout iproute2 tree to db08bdb816d337102c5486744008db9c9faa43bf
(before buggy commit) we indeed had this result :
# ./ss -an | grep 127.0.0.1
raw UNCONN 213486 0 127.0.0.1:6 *:*
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