Harald Welte has submitted this change and it was merged.

Change subject: Add support for IPv4v6 End User Addresses
......................................................................


Add support for IPv4v6 End User Addresses

Before this commit, when an MS requested an ipv4v6 context osmo-ggsn
returned an error stating the type was unknown, and this text was
printed in the log:
Processing create PDP context request for APN 'ims'
Cannot decode EUA from MS/SGSN: f1 8d

This patch has been tested with an MS running the 3 types of addresses:
- IPv4 and IPv6: no regressions observed, the context is activated and
packets are sent to the ggsn.
- IPv4v6: Wireshark correctly parses request and reponse, and then
ICMPv6 traffic from both sides. Finally I see the MS using the IPv4 and
IPv6 DNS addresses advertised and TCP traffic over IPv4 (because
probably my IPv6 network setup is not correct). I also checked I can
disable/enable data (pdp ctx delete and activate) several times without
any issue.

Change-Id: Ic820759167fd3bdf329cb11d4b942e903fe50af5
---
M ggsn/ggsn.c
M ggsn/icmpv6.c
M gtp/pdp.h
M lib/in46_addr.c
M lib/in46_addr.h
M sgsnemu/sgsnemu.c
M tests/lib/in46a_test.c
M tests/lib/in46a_v6_test.ok
8 files changed, 231 insertions(+), 82 deletions(-)

Approvals:
  Harald Welte: Looks good to me, approved
  Jenkins Builder: Verified



diff --git a/ggsn/ggsn.c b/ggsn/ggsn.c
index 1c1276f..fa3e20c 100644
--- a/ggsn/ggsn.c
+++ b/ggsn/ggsn.c
@@ -335,17 +335,20 @@
 static int delete_context(struct pdp_t *pdp)
 {
        struct gsn_t *gsn = pdp->gsn;
-       struct ippoolm_t *ipp = (struct ippoolm_t *)pdp->peer;
        struct apn_ctx *apn = pdp->priv;
+       struct ippoolm_t *member;
+       int i;
 
        LOGPPDP(LOGL_INFO, pdp, "Deleting PDP context\n");
-       struct ippoolm_t *member = pdp->peer;
 
-       if (pdp->peer) {
-               send_trap(gsn, pdp, member, "imsi-rem-ip"); /* TRAP with IP 
removal */
-               ippool_freeip(ipp->pool, ipp);
-       } else
-               LOGPPDP(LOGL_ERROR, pdp, "Cannot find/free IP Pool member\n");
+       for (i = 0; i < 2; i++) {
+               if (pdp->peer[i]) {
+                       member = pdp->peer[i];
+                       send_trap(gsn, pdp, member, "imsi-rem-ip"); /* TRAP 
with IP removal */
+                       ippool_freeip(member->pool, member);
+               } else if(i == 0)
+                       LOGPPDP(LOGL_ERROR, pdp, "Cannot find/free IP Pool 
member\n");
+       }
 
        if (gtp_kernel_tunnel_del(pdp, apn->tun.cfg.dev_name)) {
                LOGPPDP(LOGL_ERROR, pdp, "Cannot delete tunnel from 
kernel:%s\n",
@@ -512,10 +515,10 @@
        static char name_buf[256];
        struct gsn_t *gsn = pdp->gsn;
        struct ggsn_ctx *ggsn = gsn->priv;
-       struct in46_addr addr;
-       struct ippoolm_t *member;
+       struct in46_addr addr[2];
+       struct ippoolm_t *member = NULL;
        struct apn_ctx *apn;
-       int rc;
+       int rc, num_addr, i;
 
        osmo_apn_to_str(name_buf, pdp->apn_req.v, pdp->apn_req.l);
 
@@ -550,55 +553,63 @@
        memcpy(pdp->qos_neg.v, pdp->qos_req.v, pdp->qos_req.l); /* TODO */
        pdp->qos_neg.l = pdp->qos_req.l;
 
-       if (in46a_from_eua(&pdp->eua, &addr)) {
+       memset(addr, 0, sizeof(addr));
+       if ((num_addr = in46a_from_eua(&pdp->eua, addr)) < 0) {
                LOGPPDP(LOGL_ERROR, pdp, "Cannot decode EUA from MS/SGSN: %s\n",
                        osmo_hexdump(pdp->eua.v, pdp->eua.l));
                gtp_create_context_resp(gsn, pdp, GTPCAUSE_UNKNOWN_PDP);
                return 0;
        }
 
-       if (addr.len == sizeof(struct in_addr)) {
-               /* does this APN actually have an IPv4 pool? */
-               if (!apn_supports_ipv4(apn))
-                       goto err_wrong_af;
+       /* Allocate dynamic addresses from the pool */
+       for (i = 0; i < num_addr; i++) {
+               if (addr[i].len == sizeof(struct in_addr)) {
+                       /* does this APN actually have an IPv4 pool? */
+                       if (!apn_supports_ipv4(apn))
+                               goto err_wrong_af;
 
-               rc = ippool_newip(apn->v4.pool, &member, &addr, 0);
-               if (rc < 0)
-                       goto err_pool_full;
-               in46a_to_eua(&member->addr, &pdp->eua);
+                       rc = ippool_newip(apn->v4.pool, &member, &addr[i], 0);
+                       if (rc < 0)
+                               goto err_pool_full;
+                       /* copy back */
+                       memcpy(&addr[i].v4.s_addr, &member->addr.v4, 4);
 
+               } else if (addr[i].len == sizeof(struct in6_addr)) {
+
+                       /* does this APN actually have an IPv6 pool? */
+                       if (!apn_supports_ipv6(apn))
+                               goto err_wrong_af;
+
+                       rc = ippool_newip(apn->v6.pool, &member, &addr[i], 0);
+                       if (rc < 0)
+                               goto err_pool_full;
+
+                       /* IPv6 doesn't really send the real/allocated address 
at this point, but just
+                        * the link-identifier which the MS shall use for 
router solicitation */
+                       /* initialize upper 64 bits to prefix, they are 
discarded by MS anyway */
+                       memcpy(addr[i].v6.s6_addr, &member->addr.v6, 8);
+                       /* use allocated 64bit prefix as lower 64bit, used as 
link id by MS */
+                       memcpy(addr[i].v6.s6_addr+8, &member->addr.v6, 8);
+               } else
+                       OSMO_ASSERT(0);
+
+               pdp->peer[i] = member;
+               member->peer = pdp;
+       }
+
+       in46a_to_eua(addr, num_addr, &pdp->eua);
+
+       if (apn_supports_ipv4(apn)) {
                /* TODO: In IPv6, EUA doesn't contain the actual IP 
addr/prefix! */
                if (gtp_kernel_tunnel_add(pdp, apn->tun.cfg.dev_name) < 0) {
                        LOGPPDP(LOGL_ERROR, pdp, "Cannot add tunnel to kernel: 
%s\n", strerror(errno));
                        gtp_create_context_resp(gsn, pdp, GTPCAUSE_SYS_FAIL);
                        return 0;
                }
-       } else if (addr.len == sizeof(struct in6_addr)) {
-               struct in46_addr tmp;
+       }
 
-               /* does this APN actually have an IPv6 pool? */
-               if (!apn_supports_ipv6(apn))
-                       goto err_wrong_af;
-
-               rc = ippool_newip(apn->v6.pool, &member, &addr, 0);
-               if (rc < 0)
-                       goto err_pool_full;
-
-               /* IPv6 doesn't really send the real/allocated address at this 
point, but just
-                * the link-identifier which the MS shall use for router 
solicitation */
-               tmp.len = addr.len;
-               /* initialize upper 64 bits to prefix, they are discarded by MS 
anyway */
-               memcpy(tmp.v6.s6_addr, &member->addr.v6, 8);
-               /* use allocated 64bit prefix as lower 64bit, used as link id 
by MS */
-               memcpy(tmp.v6.s6_addr+8, &member->addr.v6, 8);
-               in46a_to_eua(&tmp, &pdp->eua);
-       } else
-               OSMO_ASSERT(0);
-
-       pdp->peer = member;
        pdp->ipif = apn->tun.tun;       /* TODO */
        pdp->priv = apn;
-       member->peer = pdp;
 
        if (!send_trap(gsn, pdp, member, "imsi-ass-ip")) { /* TRAP with IP 
assignment */
                gtp_create_context_resp(gsn, pdp, GTPCAUSE_NO_RESOURCES);
diff --git a/ggsn/icmpv6.c b/ggsn/icmpv6.c
index 11ced24..6564a54 100644
--- a/ggsn/icmpv6.c
+++ b/ggsn/icmpv6.c
@@ -183,12 +183,17 @@
 int handle_router_mcast(struct gsn_t *gsn, struct pdp_t *pdp, const struct 
in6_addr *own_ll_addr,
                        const uint8_t *pack, unsigned len)
 {
-       struct ippoolm_t *member = pdp->peer;
+       struct ippoolm_t *member;
        const struct ip6_hdr *ip6h = (struct ip6_hdr *)pack;
        const struct icmpv6_hdr *ic6h = (struct icmpv6_hdr *) (pack + 
sizeof(*ip6h));
        struct msgb *msg;
 
        OSMO_ASSERT(pdp);
+
+       member = pdp->peer[0];
+       OSMO_ASSERT(member);
+       if (member->addr.len == sizeof(struct in_addr)) /* ipv4v6 context */
+               member = pdp->peer[1];
        OSMO_ASSERT(member);
 
        if (len < sizeof(*ip6h)) {
diff --git a/gtp/pdp.h b/gtp/pdp.h
index f1d8ad6..b581952 100644
--- a/gtp/pdp.h
+++ b/gtp/pdp.h
@@ -26,6 +26,7 @@
 #define PDP_EUA_ORG_IETF       0xF1
 #define PDP_EUA_TYPE_v4                0x21
 #define PDP_EUA_TYPE_v6                0x57
+#define PDP_EUA_TYPE_v4v6      0x8D
 
 /* GTP Information elements from 29.060 v3.9.0 7.7 Information Elements */
 /* Also covers version 0. Note that version 0 6: QOS Profile was superceded *
@@ -121,7 +122,7 @@
        /* Parameters shared by all PDP context belonging to the same MS */
 
        void *ipif;             /* IP network interface */
-       void *peer;             /* Pointer to peer protocol */
+       void *peer[2];          /* Pointer to peer protocol */
        void *asap;             /* Application specific service access point */
 
        uint64_t imsi;          /* International Mobile Subscriber Identity. */
diff --git a/lib/in46_addr.c b/lib/in46_addr.c
index 36ad6af..f4bb8a2 100644
--- a/lib/in46_addr.c
+++ b/lib/in46_addr.c
@@ -253,33 +253,66 @@
        }
 }
 
-/*! Convert given PDP End User Address to in46_addr
- *  \returns 0 on success; negative on error */
-int in46a_to_eua(const struct in46_addr *src, struct ul66_t *eua)
+/*! Convert given array of in46_addr to PDP End User Address
+ *  \param[in] src Array containing 1 or 2 in46_addr
+ *  \param[out] eua End User Address structure to fill
+ *  \returns 0 on success; negative on error
+ *
+ * In case size is 2, this function expects to find exactly one IPv4 and one
+ * IPv6 addresses in src. */
+int in46a_to_eua(const struct in46_addr *src, unsigned int size, struct ul66_t 
*eua)
 {
-       switch (src->len) {
-       case 4:
-               eua->l = 6;
-               eua->v[0] = PDP_EUA_ORG_IETF;
-               eua->v[1] = PDP_EUA_TYPE_v4;
-               memcpy(&eua->v[2], &src->v4, 4);        /* Copy a 4 byte 
address */
-               break;
-       case 8:
-       case 16:
-               eua->l = 18;
-               eua->v[0] = PDP_EUA_ORG_IETF;
-               eua->v[1] = PDP_EUA_TYPE_v6;
-               memcpy(&eua->v[2], &src->v6, 16);       /* Copy a 16 byte 
address */
-               break;
-       default:
-               OSMO_ASSERT(0);
-               return -1;
+       const struct in46_addr *src_v4, *src_v6;
+       if (size == 1) {
+               switch (src->len) {
+               case 4:
+                       eua->l = 6;
+                       eua->v[0] = PDP_EUA_ORG_IETF;
+                       eua->v[1] = PDP_EUA_TYPE_v4;
+                       memcpy(&eua->v[2], &src->v4, 4);        /* Copy a 4 
byte address */
+                       break;
+               case 8:
+               case 16:
+                       eua->l = 18;
+                       eua->v[0] = PDP_EUA_ORG_IETF;
+                       eua->v[1] = PDP_EUA_TYPE_v6;
+                       memcpy(&eua->v[2], &src->v6, 16);       /* Copy a 16 
byte address */
+                       break;
+               default:
+                       OSMO_ASSERT(0);
+                       return -1;
+               }
+               return 0;
        }
+
+       if (src[0].len == src[1].len)
+               return -1; /* we should have a v4 and a v6 address */
+
+       src_v4 = (src[0].len == 4) ? &src[0] : &src[1];
+       src_v6 = (src[0].len == 4) ? &src[1] : &src[0];
+
+       eua->l = 22;
+       eua->v[0] = PDP_EUA_ORG_IETF;
+       eua->v[1] = PDP_EUA_TYPE_v4v6;
+       memcpy(&eua->v[2], &src_v4->v4, 4);
+       memcpy(&eua->v[6], &src_v6->v6, 16);
+
        return 0;
 }
 
-/*! Convert given in46_addr to PDP End User Address
- *  \returns 0 on success; negative on error */
+/*! Convert given PDP End User Address to an array of in46_addr
+ *  \param[in] eua End User Address structure to parse
+ *  \param[out] dst Array containing 2 in46_addr
+ *  \returns number of parsed addresses (1 or 2) on success; negative on error
+ *
+ * This function expects to receive an End User Address struct together with an
+ * array of 2 zeroed in46_addr structs. The in46_addr structs are filled in
+ * order, hence if the function returns 1 the parsed address will be stored in
+ * the first struct and the second one will be left intact. If 2 is returned, 
it
+ * is guaranteed that one of them is an IPv4 and the other one is an IPv6, but
+ * the order in which they are presented is not specified and must be
+ * discovered for instance by checking the len field of each address.
+ */
 int in46a_from_eua(const struct ul66_t *eua, struct in46_addr *dst)
 {
        if (eua->l < 2)
@@ -295,22 +328,46 @@
                        memcpy(&dst->v4, &eua->v[2], 4);        /* Copy a 4 
byte address */
                else
                        dst->v4.s_addr = 0;
-               break;
+               return 1;
        case PDP_EUA_TYPE_v6:
                dst->len = 16;
                if (eua->l >= 18)
                        memcpy(&dst->v6, &eua->v[2], 16);       /* Copy a 16 
byte address */
                else
                        memset(&dst->v6, 0, 16);
-               break;
+               return 1;
+       case PDP_EUA_TYPE_v4v6:
+               /* 3GPP TS 29.060, section 7.7.27 */
+               switch (eua->l) {
+                       case 2: /* v4 & v6 dynamic */
+                               dst[0].v4.s_addr = 0;
+                               memset(&dst[1].v6, 0, 16);
+                               break;
+                       case 6: /* v4 static, v6 dynamic */
+                               memcpy(&dst[0].v4, &eua->v[2], 4);
+                               memset(&dst[1].v6, 0, 16);
+                               break;
+                       case 18: /* v4 dynamic, v6 static */
+                               dst[0].v4.s_addr = 0;
+                               memcpy(&dst[1].v6, &eua->v[2], 16);
+                               break;
+                       case 22:  /* v4 & v6 static */
+                               memcpy(&dst[0].v4, &eua->v[2], 4);
+                               memcpy(&dst[1].v6, &eua->v[6], 16);
+                               break;
+                       default:
+                               return -1;
+               }
+               dst[0].len = 4;
+               dst[1].len = 16;
+               return 2;
        default:
                return -1;
        }
-       return 0;
 
 default_to_dyn_v4:
        /* assume dynamic IPv4 by default */
        dst->len = 4;
        dst->v4.s_addr = 0;
-       return 0;
+       return 1;
 }
diff --git a/lib/in46_addr.h b/lib/in46_addr.h
index ff26521..e4654cc 100644
--- a/lib/in46_addr.h
+++ b/lib/in46_addr.h
@@ -29,5 +29,5 @@
 extern int in46a_within_mask(const struct in46_addr *addr, const struct 
in46_addr *net, size_t prefixlen);
 unsigned int in46a_netmasklen(const struct in46_addr *netmask);
 
-int in46a_to_eua(const struct in46_addr *src, struct ul66_t *eua);
+int in46a_to_eua(const struct in46_addr *src, unsigned int size, struct ul66_t 
*eua);
 int in46a_from_eua(const struct ul66_t *eua, struct in46_addr *dst);
diff --git a/sgsnemu/sgsnemu.c b/sgsnemu/sgsnemu.c
index c31f875..300183b 100644
--- a/sgsnemu/sgsnemu.c
+++ b/sgsnemu/sgsnemu.c
@@ -1617,7 +1617,7 @@
                /* Otherwise it is deallocated by gtplib */
                pdp_newpdp(&pdp, myimsi, options.nsapi, NULL);
 
-               pdp->peer = &iparr[n];
+               pdp->peer[0] = &iparr[n]; /* FIXME: support v4v6, have 2 peers 
*/
                pdp->ipif = tun;        /* TODO */
                iparr[n].pdp = pdp;
 
diff --git a/tests/lib/in46a_test.c b/tests/lib/in46a_test.c
index c0bb670..b22da16 100644
--- a/tests/lib/in46a_test.c
+++ b/tests/lib/in46a_test.c
@@ -137,7 +137,7 @@
 #endif
 
        /* IPv4 address */
-       OSMO_ASSERT(in46a_to_eua(&g_ia4, &eua) == 0);
+       OSMO_ASSERT(in46a_to_eua(&g_ia4, 1, &eua) == 0);
        OSMO_ASSERT(eua.v[0] == PDP_EUA_ORG_IETF);
        OSMO_ASSERT(eua.v[1] == PDP_EUA_TYPE_v4);
        OSMO_ASSERT(osmo_load32le(&eua.v[2]) == g_ia4.v4.s_addr);
@@ -154,7 +154,7 @@
        printf("Testing in46a_from_eua() with IPv4 addresses\n");
 
        /* default: v4 unspec */
-       OSMO_ASSERT(in46a_from_eua(&eua, &ia) == 0);
+       OSMO_ASSERT(in46a_from_eua(&eua, &ia) == 1);
        OSMO_ASSERT(ia.len == 4);
        OSMO_ASSERT(ia.v4.s_addr == 0);
 
@@ -173,14 +173,14 @@
        /* unspecified V4 */
        memcpy(eua.v, v4_unspec, sizeof(v4_unspec));
        eua.l = sizeof(v4_unspec);
-       OSMO_ASSERT(in46a_from_eua(&eua, &ia) == 0);
+       OSMO_ASSERT(in46a_from_eua(&eua, &ia) == 1);
        OSMO_ASSERT(ia.len == 4);
        OSMO_ASSERT(ia.v4.s_addr == 0);
 
        /* specified V4 */
        memcpy(eua.v, v4_spec, sizeof(v4_spec));
        eua.l = sizeof(v4_spec);
-       OSMO_ASSERT(in46a_from_eua(&eua, &ia) == 0);
+       OSMO_ASSERT(in46a_from_eua(&eua, &ia) == 1);
        OSMO_ASSERT(ia.len == 4);
        OSMO_ASSERT(ia.v4.s_addr == htonl(0x01020304));
 }
@@ -278,19 +278,41 @@
        };
        struct ul66_t eua;
 
-       printf("testing in46a_to_eua() with IPv6 addresses\n");
+       printf("Testing in46a_to_eua() with IPv6 addresses\n");
 
        /* IPv6 address */
-       OSMO_ASSERT(in46a_to_eua(&g_ia6, &eua) == 0);
+       OSMO_ASSERT(in46a_to_eua(&g_ia6, 1, &eua) == 0);
        OSMO_ASSERT(eua.v[0] == PDP_EUA_ORG_IETF);
        OSMO_ASSERT(eua.v[1] == PDP_EUA_TYPE_v6);
        OSMO_ASSERT(!memcmp(&eua.v[2], &g_ia6.v6, 16));
 
        /* IPv6 address with prefix / length 8 */
-       OSMO_ASSERT(in46a_to_eua(&ia_v6_8, &eua) == 0);
+       OSMO_ASSERT(in46a_to_eua(&ia_v6_8, 1, &eua) == 0);
        OSMO_ASSERT(eua.v[0] == PDP_EUA_ORG_IETF);
        OSMO_ASSERT(eua.v[1] == PDP_EUA_TYPE_v6);
        OSMO_ASSERT(!memcmp(&eua.v[2], &ia_v6_8.v6, 16));
+}
+
+static void test_in46a_to_eua_v4v6() {
+       const struct in46_addr ia_v4v6[2] = {
+               {
+               .len = 16,
+               .v6.s6_addr = { 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16 },
+               },
+               {
+               .len = 4,
+               .v4.s_addr = 0x0d0c0b0a,
+               }
+       };
+       struct ul66_t eua;
+       printf("Testing in46a_to_eua() with IPv4v6 addresses\n");
+
+       /* IPv4 address */
+       OSMO_ASSERT(in46a_to_eua(ia_v4v6, 2, &eua) == 0);
+       OSMO_ASSERT(eua.v[0] == PDP_EUA_ORG_IETF);
+       OSMO_ASSERT(eua.v[1] == PDP_EUA_TYPE_v4v6);
+       OSMO_ASSERT(osmo_load32le(&eua.v[2]) == g_ia4.v4.s_addr);
+       OSMO_ASSERT(!memcmp(&eua.v[6], &g_ia6.v6, 16));
 }
 
 static void test_in46a_from_eua_v6(void)
@@ -308,16 +330,65 @@
        /* unspecified V6 */
        memcpy(eua.v, v6_unspec, sizeof(v6_unspec));
        eua.l = sizeof(v6_unspec);
-       OSMO_ASSERT(in46a_from_eua(&eua, &ia) == 0);
+       OSMO_ASSERT(in46a_from_eua(&eua, &ia) == 1);
        OSMO_ASSERT(ia.len == 16);
        OSMO_ASSERT(IN6_IS_ADDR_UNSPECIFIED(&ia.v6));
 
        /* specified V6 */
        memcpy(eua.v, v6_spec, sizeof(v6_spec));
        eua.l = sizeof(v6_spec);
-       OSMO_ASSERT(in46a_from_eua(&eua, &ia) == 0);
+       OSMO_ASSERT(in46a_from_eua(&eua, &ia) == 1);
        OSMO_ASSERT(ia.len == 16);
        OSMO_ASSERT(!memcmp(&ia.v6, v6_spec+2, ia.len));
+}
+
+static void test_in46a_from_eua_v4v6(void) {
+       struct in46_addr ia[2];
+       struct ul66_t eua;
+       const uint8_t v4_unspec_v6_unspec[] = { PDP_EUA_ORG_IETF, 
PDP_EUA_TYPE_v4v6 };
+       const uint8_t v4_spec_v6_unspec[] = { PDP_EUA_ORG_IETF, 
PDP_EUA_TYPE_v4v6, 1,2,3,4 };
+       const uint8_t v4_unspec_v6_spec[] = { PDP_EUA_ORG_IETF, 
PDP_EUA_TYPE_v4v6, 1,2,3,4,5,6,7,8,9,0xa,0xb,0xc,0xd,0xe,0xf,0x10 };
+       const uint8_t v4_spec_v6_spec[] = { PDP_EUA_ORG_IETF, 
PDP_EUA_TYPE_v4v6, 1,2,3,4, 1,2,3,4,5,6,7,8,9,0xa,0xb,0xc,0xd,0xe,0xf,0x10 };
+
+       memset(&eua, 0, sizeof(eua));
+
+       printf("Testing in46a_from_eua() with IPv4v6 addresses\n");
+
+       /* unspecified V4 & V6 */
+       memcpy(eua.v, v4_unspec_v6_unspec, sizeof(v4_unspec_v6_unspec));
+       eua.l = sizeof(v4_unspec_v6_unspec);
+       OSMO_ASSERT(in46a_from_eua(&eua, ia) == 2);
+       OSMO_ASSERT(ia[0].len == 4);
+       OSMO_ASSERT(ia[1].len == 16);
+       OSMO_ASSERT(ia[0].v4.s_addr == 0);
+       OSMO_ASSERT(IN6_IS_ADDR_UNSPECIFIED(&ia[1].v6));
+
+       /* specified V4, unspecified V6 */
+       memcpy(eua.v, v4_spec_v6_unspec, sizeof(v4_spec_v6_unspec));
+       eua.l = sizeof(v4_spec_v6_unspec);
+       OSMO_ASSERT(in46a_from_eua(&eua, ia) == 2);
+       OSMO_ASSERT(ia[0].len == 4);
+       OSMO_ASSERT(ia[1].len == 16);
+       OSMO_ASSERT(ia[0].v4.s_addr == htonl(0x01020304));
+       OSMO_ASSERT(IN6_IS_ADDR_UNSPECIFIED(&ia[1].v6));
+
+       /* unspecified V4, specified V6 */
+       memcpy(eua.v, v4_unspec_v6_spec, sizeof(v4_unspec_v6_spec));
+       eua.l = sizeof(v4_unspec_v6_spec);
+       OSMO_ASSERT(in46a_from_eua(&eua, ia) == 2);
+       OSMO_ASSERT(ia[0].len == 4);
+       OSMO_ASSERT(ia[1].len == 16);
+       OSMO_ASSERT(ia[0].v4.s_addr == 0);
+       OSMO_ASSERT(!memcmp(&ia[1].v6, v4_unspec_v6_spec+2, ia[1].len));
+
+       /* specified V4, specified V6 */
+       memcpy(eua.v, v4_spec_v6_spec, sizeof(v4_spec_v6_spec));
+       eua.l = sizeof(v4_spec_v6_spec);
+       OSMO_ASSERT(in46a_from_eua(&eua, ia) == 2);
+       OSMO_ASSERT(ia[0].len == 4);
+       OSMO_ASSERT(ia[1].len == 16);
+       OSMO_ASSERT(ia[0].v4.s_addr == htonl(0x01020304));
+       OSMO_ASSERT(!memcmp(&ia[1].v6, v4_spec_v6_spec+6, ia[1].len));
 }
 
 static void test_in46a_netmasklen_v6(void)
@@ -378,6 +449,8 @@
                test_in46a_equal_v6();
                test_in46a_to_eua_v6();
                test_in46a_from_eua_v6();
+               test_in46a_to_eua_v4v6();
+               test_in46a_from_eua_v4v6();
                test_in46a_netmasklen_v6();
        }
        return 0;
diff --git a/tests/lib/in46a_v6_test.ok b/tests/lib/in46a_v6_test.ok
index d092591..10dc7f4 100644
--- a/tests/lib/in46a_v6_test.ok
+++ b/tests/lib/in46a_v6_test.ok
@@ -3,6 +3,8 @@
 Testing in46a_ntop() with IPv6 addresses
 res = 102:304:506:708:90a:b0c:d0e:f10
 Testing in46a_equal() with IPv6 addresses
-testing in46a_to_eua() with IPv6 addresses
+Testing in46a_to_eua() with IPv6 addresses
 Testing in46a_from_eua() with IPv6 addresses
+Testing in46a_to_eua() with IPv4v6 addresses
+Testing in46a_from_eua() with IPv4v6 addresses
 Testing in46a_netmasklen() with IPv6 addresses

-- 
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Gerrit-MessageType: merged
Gerrit-Change-Id: Ic820759167fd3bdf329cb11d4b942e903fe50af5
Gerrit-PatchSet: 3
Gerrit-Project: osmo-ggsn
Gerrit-Branch: master
Gerrit-Owner: Pau Espin Pedrol <[email protected]>
Gerrit-Reviewer: Harald Welte <[email protected]>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: Pau Espin Pedrol <[email protected]>

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