#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include <unistd.h>
#include <netdb.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/select.h>

#include "xmalloc.h"
#include "die.h"
#include "sock.h"
#include "stun.h"

#define BINDING_REQUEST               0x0001
#define BINDING_RESPONSE              0x0101

#define MAPPED_ADDRESS                0x0001

#define TIMEOUT                       5000
#define REQUEST_LEN                   20

#define ID_COOKIE_FIELD               htonl(((int) 'a' << 24) + \
					    ((int) 'c' << 16) + \
					    ((int) 'd' <<  8) + \
					     (int) 'c')

struct stun_header {
	uint16_t type;
	uint16_t len;
	uint32_t magic_cookie; 
	uint32_t transid[3];
};

struct stun_attrib {
	uint16_t type;
	uint16_t len;
	uint8_t *value;
};

struct stun_mapped_addr {
	uint8_t none;
	uint8_t family;
	uint16_t port;
	uint32_t ip;
};

static int stun_test(const char *server_ip, int server_port,
		     int tun_port)
{
	int ret, sock;
	uint8_t pkt[256];
	uint8_t rpkt[256];
	size_t len, off, max;
	struct in_addr in;
	struct timeval timeout;
	struct stun_header *hdr, *rhdr;
	struct stun_attrib *attr;
	struct stun_mapped_addr *addr;
	struct sockaddr_in saddr, daddr;
	fd_set fdset;

	if (!server_ip)
		return -EINVAL;

	sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
	if (sock < 0)
		panic("Cannot obtain socket!\n");

	set_reuseaddr(sock);

	saddr.sin_family = PF_INET;
	saddr.sin_port = htons(tun_port);
	saddr.sin_addr.s_addr = INADDR_ANY;

	ret = bind(sock, (struct sockaddr *) &saddr, sizeof(saddr));
	if (ret)
		panic("Cannot bind udp socket!\n");

	len = REQUEST_LEN;
	hdr = (struct stun_header *) pkt;
	hdr->type = htons(BINDING_REQUEST);
	hdr->len = 0;
	hdr->magic_cookie = ID_COOKIE_FIELD;
	hdr->transid[0] = htonl(rand());
	hdr->transid[1] = htonl(rand());
	hdr->transid[2] = htonl(rand());

	daddr.sin_family = PF_INET;
	daddr.sin_port = htons(server_port);
	daddr.sin_addr.s_addr = inet_addr(server_ip);

	ret = sendto(sock, pkt, len, 0, (struct sockaddr *) &daddr,
		     sizeof(daddr));
	if (ret != len) {
		printf("Error sending request (%s)!\n", strerror(errno));
		return -EIO;
	}

	timeout.tv_sec = TIMEOUT / 1000;
	timeout.tv_usec = (TIMEOUT % 1000) * 1000;

	FD_ZERO(&fdset);
	FD_SET(sock, &fdset);

	ret = select(sock + 1, &fdset, NULL, NULL, &timeout);
	if (ret <= 0) {
		printf("STUN server timeout!\n");
		return -EIO;
	}

	memset(rpkt, 0, sizeof(rpkt));
	len = read(sock, rpkt, sizeof(rpkt));

	close(sock);

	if (len < REQUEST_LEN) {
		printf("Bad STUN response (%s)!\n", strerror(errno));
		return -EIO;
	}

	rhdr = (struct stun_header *) rpkt;
	if (ntohs(rhdr->type) != BINDING_RESPONSE) {
		printf("Wrong STUN response type!\n");
		return -EIO;
	}

	if (rhdr->len == 0) {
		printf("No attributes in STUN response!\n");
		return -EIO;
	}

	if (rhdr->magic_cookie != hdr->magic_cookie ||
	    rhdr->transid[0] != hdr->transid[0] ||
	    rhdr->transid[1] != hdr->transid[1] ||
	    rhdr->transid[2] != hdr->transid[2]) {
		printf("Got wrong STUN transaction id!\n");
		return -EIO;
	}

	off = REQUEST_LEN;
	max = ntohs(rhdr->len) + REQUEST_LEN;

	while (off + 8 < max) {
		attr = (struct stun_attrib *) (rpkt + off);
		if (ntohs(attr->type) != MAPPED_ADDRESS)
			goto next;

		addr = (struct stun_mapped_addr *) (rpkt + off + 4);
		if (addr->family != 0x1)
			break;

		in.s_addr = addr->ip;
		printf("Public mapping %s:%u!\n",
		       inet_ntoa(in), ntohs(addr->port));
		break;
next:
		off += 4;
		off += ntohs(attr->len);
	}

	return 0;
}

int print_stun_probe(char *server, int sport, int tport)
{
	char *address;
	struct hostent *hp;

	printf("STUN on %s:%u\n", server, sport);

	srand(time(NULL));
	hp = gethostbyname(server);
	if (!hp)
		return -EIO;
	address = inet_ntoa(*(struct in_addr *) hp->h_addr_list[0]);
	return stun_test(address, sport, tport);
}
cted='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Alexander Duyck &lt;alexander.h.duyck@intel.com&gt;</td><td class='right'>2016-09-07 20:28:24 -0700</td></tr>
<tr><th>committer</th><td>Jeff Kirsher &lt;jeffrey.t.kirsher@intel.com&gt;</td><td class='right'>2016-09-23 00:21:52 -0700</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=e24fcf28959298e07cae9ee19eb9a4b2b399b4fb'>e24fcf28959298e07cae9ee19eb9a4b2b399b4fb</a> (<a href='/cgit.cgi/linux/net-next.git/patch/?id=e24fcf28959298e07cae9ee19eb9a4b2b399b4fb'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=e24fcf28959298e07cae9ee19eb9a4b2b399b4fb'>e9edd04796fda20d219c4d1a63e5556550964323</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=fa81da7e5b261cf8010f65253661522d3ff71714'>fa81da7e5b261cf8010f65253661522d3ff71714</a> (<a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=e24fcf28959298e07cae9ee19eb9a4b2b399b4fb&amp;id2=fa81da7e5b261cf8010f65253661522d3ff71714'>diff</a>)</td></tr></table>
<div class='commit-subject'>ixgbe: Support 4 queue RSS on VFs with 1 or 2 queue RSS on PF</div><div class='commit-msg'>Instead of limiting the VFs if we don't use 4 queues for RSS in the PF we
can instead just limit the RSS queues used to a power of 2.  By doing this
we can support use cases where VFs are using more queues than the PF is
currently using and can support RSS if so desired.

The only limitation on this is that we cannot support 3 queues of RSS in
the PF or VF.  In either of these cases we should fall back to 2 queues in
order to be able to use the power of 2 masking provided by the psrtype
register.

Signed-off-by: Alexander Duyck &lt;alexander.h.duyck@intel.com&gt;
Tested-by: Andrew Bowers &lt;andrewx.bowers@intel.com&gt;
Signed-off-by: Jeff Kirsher &lt;jeffrey.t.kirsher@intel.com&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=e24fcf28959298e07cae9ee19eb9a4b2b399b4fb'>Diffstat</a></div><table summary='diffstat' class='diffstat'>