X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Fpackets.c;h=8791a3ce09a244b20719a484a23d30eeaa191d21;hb=e868fb3d322f5c46385f1fc6db5bb1ab33f90305;hp=5c51feb1f3d289490de750063c8e9d79214df822;hpb=02dd3123a0e312f1d33403e744af52dd6096f12d;p=openvswitch

diff --git a/lib/packets.c b/lib/packets.c
index 5c51feb1..8791a3ce 100644
--- a/lib/packets.c
+++ b/lib/packets.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009 Nicira Networks.
+ * Copyright (c) 2009, 2010 Nicira Networks.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,15 +16,26 @@
 
 #include <config.h>
 #include "packets.h"
+#include <assert.h>
+#include <arpa/inet.h>
 #include <netinet/in.h>
 #include <stdlib.h>
+#include "byte-order.h"
+#include "dynamic-string.h"
 #include "ofpbuf.h"
 
+const struct in6_addr in6addr_exact = IN6ADDR_EXACT_INIT;
+
+/* Parses 's' as a 16-digit hexadecimal number representing a datapath ID.  On
+ * success stores the dpid into '*dpidp' and returns true, on failure stores 0
+ * into '*dpidp' and returns false.
+ *
+ * Rejects an all-zeros dpid as invalid. */
 bool
 dpid_from_string(const char *s, uint64_t *dpidp)
 {
     *dpidp = (strlen(s) == 16 && strspn(s, "0123456789abcdefABCDEF") == 16
-              ? strtoll(s, NULL, 16)
+              ? strtoull(s, NULL, 16)
               : 0);
     return *dpidp != 0;
 }
@@ -78,3 +89,173 @@ compose_benign_packet(struct ofpbuf *b, const char *tag, uint16_t snap_type,
     memcpy(llc_snap->snap.snap_org, "\x00\x23\x20", 3);
     llc_snap->snap.snap_type = htons(snap_type);
 }
+
+/* Stores the string representation of the IPv6 address 'addr' into the
+ * character array 'addr_str', which must be at least INET6_ADDRSTRLEN
+ * bytes long. */
+void
+format_ipv6_addr(char *addr_str, const struct in6_addr *addr)
+{
+    inet_ntop(AF_INET6, addr, addr_str, INET6_ADDRSTRLEN);
+}
+
+void
+print_ipv6_addr(struct ds *string, const struct in6_addr *addr)
+{
+    char addr_str[INET6_ADDRSTRLEN];
+
+    format_ipv6_addr(addr_str, addr);
+    ds_put_format(string, "%s", addr_str);
+}
+
+struct in6_addr ipv6_addr_bitand(const struct in6_addr *a,
+                                 const struct in6_addr *b)
+{
+    int i;
+    struct in6_addr dst;
+
+#ifdef s6_addr32
+    for (i=0; i<4; i++) {
+        dst.s6_addr32[i] = a->s6_addr32[i] & b->s6_addr32[i];
+    }
+#else
+    for (i=0; i<16; i++) {
+        dst.s6_addr[i] = a->s6_addr[i] & b->s6_addr[i];
+    }
+#endif
+
+    return dst;
+}
+
+/* Returns an in6_addr consisting of 'mask' high-order 1-bits and 128-N
+ * low-order 0-bits. */
+struct in6_addr
+ipv6_create_mask(int mask)
+{
+    struct in6_addr netmask;
+    uint8_t *netmaskp = &netmask.s6_addr[0];
+
+    memset(&netmask, 0, sizeof netmask);
+    while (mask > 8) {
+        *netmaskp = 0xff;
+        netmaskp++;
+        mask -= 8;
+    }
+
+    if (mask) {
+        *netmaskp = 0xff << (8 - mask);
+    }
+
+    return netmask;
+}
+
+/* Given the IPv6 netmask 'netmask', returns the number of bits of the
+ * IPv6 address that it wildcards.  'netmask' must be a CIDR netmask (see
+ * ipv6_is_cidr()). */
+int
+ipv6_count_cidr_bits(const struct in6_addr *netmask)
+{
+    int i;
+    int count = 0;
+    const uint8_t *netmaskp = &netmask->s6_addr[0];
+
+    assert(ipv6_is_cidr(netmask));
+
+    for (i=0; i<16; i++) {
+        if (netmaskp[i] == 0xff) {
+            count += 8;
+        } else {
+            uint8_t nm;
+
+            for(nm = netmaskp[i]; nm; nm <<= 1) {
+                count++;
+            }
+            break;
+        }
+
+    }
+
+    return count;
+}
+
+
+/* Returns true if 'netmask' is a CIDR netmask, that is, if it consists of N
+ * high-order 1-bits and 128-N low-order 0-bits. */
+bool
+ipv6_is_cidr(const struct in6_addr *netmask)
+{
+    const uint8_t *netmaskp = &netmask->s6_addr[0];
+    int i;
+
+    for (i=0; i<16; i++) {
+        if (netmaskp[i] != 0xff) {
+            uint8_t x = ~netmaskp[i];
+            if (x & (x + 1)) {
+                return false;
+            }
+            while (++i < 16) {
+                if (netmaskp[i]) {
+                    return false;
+                }
+            }
+        }
+    }
+
+    return true;
+}
+
+/* Fills 'b' with a LACP packet whose source address is 'eth_src', LACP actor
+ * information is 'actor', and LACP partner information is 'partner'. */
+void
+compose_lacp_packet(struct ofpbuf *b, struct lacp_info *actor,
+                    struct lacp_info *partner,
+                    const uint8_t eth_src[ETH_ADDR_LEN])
+{
+    struct eth_header *eth;
+    struct lacp_pdu *pdu;
+
+    ofpbuf_clear(b);
+
+    ofpbuf_prealloc_tailroom(b, ETH_HEADER_LEN + LACP_PDU_LEN);
+    eth = ofpbuf_put_zeros(b, ETH_HEADER_LEN);
+    pdu = ofpbuf_put_zeros(b, LACP_PDU_LEN);
+
+    memcpy(eth->eth_dst, eth_addr_lacp, ETH_ADDR_LEN);
+    memcpy(eth->eth_src, eth_src, ETH_ADDR_LEN);
+    eth->eth_type = htons(ETH_TYPE_LACP);
+
+    pdu->subtype = 1;
+    pdu->version = 1;
+
+    pdu->actor_type = 1;
+    pdu->actor_len = 20;
+    pdu->actor = *actor;
+
+    pdu->partner_type = 2;
+    pdu->partner_len = 20;
+    pdu->partner = *partner;
+
+    pdu->collector_type = 3;
+    pdu->collector_len = 16;
+    pdu->collector_delay = htons(0);
+}
+
+/* Parses 'b' which represents a packet containing a LACP PDU.  This function
+ * returns NULL if 'b' is malformed, or does not represent a LACP PDU format
+ * supported by OVS.  Otherwise, it returns a pointer to the lacp_pdu contained
+ * within 'b'. */
+const struct lacp_pdu *
+parse_lacp_packet(const struct ofpbuf *b)
+{
+    const struct lacp_pdu *pdu;
+
+    pdu = ofpbuf_at(b, (uint8_t *)b->l3 - (uint8_t *)b->data, LACP_PDU_LEN);
+
+    if (pdu && pdu->subtype == 1
+        && pdu->actor_type == 1 && pdu->actor_len == 20
+        && pdu->partner_type == 2 && pdu->partner_len == 20) {
+        return pdu;
+    } else {
+        return NULL;
+    }
+}