diff --git a/drivers/net/failsafe/Makefile b/drivers/net/failsafe/Makefile
index 81802d092..eb9292425 100644
--- a/drivers/net/failsafe/Makefile
+++ b/drivers/net/failsafe/Makefile
@@ -34,7 +34,6 @@ CFLAGS += -std=gnu99 -Wextra
 CFLAGS += -O3
 CFLAGS += -I.
 CFLAGS += -D_DEFAULT_SOURCE
-CFLAGS += -D_XOPEN_SOURCE=700
 CFLAGS += $(WERROR_FLAGS)
 CFLAGS += -Wno-strict-prototypes
 CFLAGS += -pedantic
diff --git a/drivers/net/failsafe/meson.build b/drivers/net/failsafe/meson.build
index a249ff4af..d47a52acd 100644
--- a/drivers/net/failsafe/meson.build
+++ b/drivers/net/failsafe/meson.build
@@ -3,7 +3,6 @@
 
 cflags += '-std=gnu99'
 cflags += '-D_DEFAULT_SOURCE'
-cflags += '-D_XOPEN_SOURCE=700'
 cflags += '-pedantic'
 if host_machine.system() == 'linux'
 	cflags += '-DLINUX'
diff --git a/examples/ip_reassembly/main.c b/examples/ip_reassembly/main.c
index b830f67a5..58c388708 100644
--- a/examples/ip_reassembly/main.c
+++ b/examples/ip_reassembly/main.c
@@ -366,12 +366,14 @@ reassemble(struct rte_mbuf *m, uint16_t portid, uint32_t queue,
 		eth_hdr->ether_type = rte_be_to_cpu_16(ETHER_TYPE_IPv4);
 	} else if (RTE_ETH_IS_IPV6_HDR(m->packet_type)) {
 		/* if packet is IPv6 */
-		struct ipv6_extension_fragment *frag_hdr;
+		const struct ipv6_extension_fragment *frag_hdr;
+		struct ipv6_extension_fragment frag_hdr_buf;
 		struct ipv6_hdr *ip_hdr;
 
 		ip_hdr = (struct ipv6_hdr *)(eth_hdr + 1);
 
-		frag_hdr = rte_ipv6_frag_get_ipv6_fragment_header(ip_hdr);
+		frag_hdr = rte_ipv6_frag_get_ipv6_fragment_header(m,
+			ip_hdr, &frag_hdr_buf);
 
 		if (frag_hdr != NULL) {
 			struct rte_mbuf *mo;
diff --git a/lib/librte_ip_frag/rte_ip_frag.h b/lib/librte_ip_frag/rte_ip_frag.h
index b3f3f78df..bd6f02a16 100644
--- a/lib/librte_ip_frag/rte_ip_frag.h
+++ b/lib/librte_ip_frag/rte_ip_frag.h
@@ -208,28 +208,25 @@ rte_ipv6_fragment_packet(struct rte_mbuf *pkt_in,
 struct rte_mbuf *rte_ipv6_frag_reassemble_packet(struct rte_ip_frag_tbl *tbl,
 		struct rte_ip_frag_death_row *dr,
 		struct rte_mbuf *mb, uint64_t tms, struct ipv6_hdr *ip_hdr,
-		struct ipv6_extension_fragment *frag_hdr);
+		const struct ipv6_extension_fragment *frag_hdr);
 
 /**
  * Return a pointer to the packet's fragment header, if found.
- * It only looks at the extension header that's right after the fixed IPv6
- * header, and doesn't follow the whole chain of extension headers.
  *
- * @param hdr
+ * @param pkt
+ *   Pointer to the mbuf of the packet.
+ * @param ip_hdr
  *   Pointer to the IPv6 header.
+ * @param frag_hdr
+ *   A pointer to the buffer where the fragment header
+ *   will be copied if it is not contiguous in mbuf data.
  * @return
  *   Pointer to the IPv6 fragment extension header, or NULL if it's not
  *   present.
  */
-static inline struct ipv6_extension_fragment *
-rte_ipv6_frag_get_ipv6_fragment_header(struct ipv6_hdr *hdr)
-{
-	if (hdr->proto == IPPROTO_FRAGMENT) {
-		return (struct ipv6_extension_fragment *) ++hdr;
-	}
-	else
-		return NULL;
-}
+const struct ipv6_extension_fragment *rte_ipv6_frag_get_ipv6_fragment_header(
+		struct rte_mbuf *pkt, const struct ipv6_hdr *ip_hdr,
+		struct ipv6_extension_fragment *frag_hdr);
 
 /**
  * IPv4 fragmentation.
diff --git a/lib/librte_ip_frag/rte_ip_frag_version.map b/lib/librte_ip_frag/rte_ip_frag_version.map
index d1acf07cb..98fe4f2d4 100644
--- a/lib/librte_ip_frag/rte_ip_frag_version.map
+++ b/lib/librte_ip_frag/rte_ip_frag_version.map
@@ -8,6 +8,7 @@ DPDK_2.0 {
 	rte_ipv4_fragment_packet;
 	rte_ipv6_frag_reassemble_packet;
 	rte_ipv6_fragment_packet;
+	rte_ipv6_frag_get_ipv6_fragment_header;
 
 	local: *;
 };
diff --git a/lib/librte_ip_frag/rte_ipv6_fragmentation.c b/lib/librte_ip_frag/rte_ipv6_fragmentation.c
index 62a7e4e83..bd847dd3d 100644
--- a/lib/librte_ip_frag/rte_ipv6_fragmentation.c
+++ b/lib/librte_ip_frag/rte_ipv6_fragmentation.c
@@ -176,3 +176,41 @@ rte_ipv6_fragment_packet(struct rte_mbuf *pkt_in,
 
 	return out_pkt_pos;
 }
+
+const struct ipv6_extension_fragment *
+rte_ipv6_frag_get_ipv6_fragment_header(struct rte_mbuf *pkt,
+	const struct ipv6_hdr *ip_hdr,
+	struct ipv6_extension_fragment *frag_hdr)
+{
+	size_t offset = sizeof(struct ipv6_hdr);
+	uint8_t nexthdr = ip_hdr->proto;
+
+	while (ipv6_ext_hdr(nexthdr)) {
+		struct ipv6_opt_hdr opt;
+		const struct ipv6_opt_hdr *popt = rte_pktmbuf_read(pkt,
+			offset, sizeof(opt), &opt);
+		if (popt == NULL)
+			return NULL;
+
+		switch (nexthdr) {
+		case IPPROTO_NONE:
+			return NULL;
+
+		case IPPROTO_FRAGMENT:
+			return rte_pktmbuf_read(pkt, offset,
+				sizeof(*frag_hdr), frag_hdr);
+
+		case IPPROTO_AH:
+			offset += (popt->hdrlen + 2) << 2;
+			break;
+
+		default:
+			offset += (popt->hdrlen + 1) << 3;
+			break;
+		}
+
+		nexthdr = popt->nexthdr;
+	}
+
+	return NULL;
+}
diff --git a/lib/librte_ip_frag/rte_ipv6_reassembly.c b/lib/librte_ip_frag/rte_ipv6_reassembly.c
index db249fe60..b2d67a3f0 100644
--- a/lib/librte_ip_frag/rte_ipv6_reassembly.c
+++ b/lib/librte_ip_frag/rte_ipv6_reassembly.c
@@ -135,8 +135,8 @@ ipv6_frag_reassemble(struct ip_frag_pkt *fp)
 #define FRAG_OFFSET(x) (rte_cpu_to_be_16(x) >> 3)
 struct rte_mbuf *
 rte_ipv6_frag_reassemble_packet(struct rte_ip_frag_tbl *tbl,
-		struct rte_ip_frag_death_row *dr, struct rte_mbuf *mb, uint64_t tms,
-		struct ipv6_hdr *ip_hdr, struct ipv6_extension_fragment *frag_hdr)
+	struct rte_ip_frag_death_row *dr, struct rte_mbuf *mb, uint64_t tms,
+	struct ipv6_hdr *ip_hdr, const struct ipv6_extension_fragment *frag_hdr)
 {
 	struct ip_frag_pkt *fp;
 	struct ip_frag_key key;
diff --git a/lib/librte_net/rte_ip.h b/lib/librte_net/rte_ip.h
index f2a8904a2..edcbdb67a 100644
--- a/lib/librte_net/rte_ip.h
+++ b/lib/librte_net/rte_ip.h
@@ -350,6 +350,14 @@ struct ipv6_hdr {
 #define IPV6_HDR_FL_MASK ((1u << IPV6_HDR_TC_SHIFT) - 1)
 #define IPV6_HDR_TC_MASK (0xf << IPV6_HDR_TC_SHIFT)
 
+/**
+ * IPv6 extension header
+ */
+struct ipv6_opt_hdr {
+	uint8_t nexthdr;
+	uint8_t hdrlen;
+} __attribute__((packed));
+
 /**
  * Process the pseudo-header checksum of an IPv6 header.
  *
@@ -421,6 +429,25 @@ rte_ipv6_udptcp_cksum(const struct ipv6_hdr *ipv6_hdr, const void *l4_hdr)
 	return (uint16_t)cksum;
 }
 
+/**
+ * Check whether an IPv6 nexthdr value is for an IPv6 extension header.
+ *
+ * @param nexthdr
+ *   The protocol/next header field from an IPv6 (extension) header.
+ * @return
+ *   Whether the nexthdr field is for an IPv6 extension header.
+ */
+static inline int
+ipv6_ext_hdr(uint8_t nexthdr)
+{
+	return (nexthdr == IPPROTO_HOPOPTS) ||
+		(nexthdr == IPPROTO_ROUTING) ||
+		(nexthdr == IPPROTO_FRAGMENT) ||
+		(nexthdr == IPPROTO_AH) ||
+		(nexthdr == IPPROTO_NONE) ||
+		(nexthdr == IPPROTO_DSTOPTS);
+}
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/librte_port/rte_port_ras.c b/lib/librte_port/rte_port_ras.c
index c8b2e19bf..28764f744 100644
--- a/lib/librte_port/rte_port_ras.c
+++ b/lib/librte_port/rte_port_ras.c
@@ -184,9 +184,11 @@ process_ipv6(struct rte_port_ring_writer_ras *p, struct rte_mbuf *pkt)
 	/* Assume there is no ethernet header */
 	struct ipv6_hdr *pkt_hdr = rte_pktmbuf_mtod(pkt, struct ipv6_hdr *);
 
-	struct ipv6_extension_fragment *frag_hdr;
+	const struct ipv6_extension_fragment *frag_hdr;
+	struct ipv6_extension_fragment frag_hdr_buf;
 	uint16_t frag_data = 0;
-	frag_hdr = rte_ipv6_frag_get_ipv6_fragment_header(pkt_hdr);
+	frag_hdr = rte_ipv6_frag_get_ipv6_fragment_header(pkt, pkt_hdr,
+		&frag_hdr_buf);
 	if (frag_hdr != NULL)
 		frag_data = rte_be_to_cpu_16(frag_hdr->frag_data);
 
