]> granicus.if.org Git - strace/blobdiff - netlink_sock_diag.c
mem: decode hugetlb page size in mmap flags
[strace] / netlink_sock_diag.c
index 7fe0e7d1168102783395c84502c96c6352414352..dd1e03d3602a0592458782a2c179c4b81ea23736 100644 (file)
 
 #include "defs.h"
 #include "netlink.h"
-#include "nlattr.h"
-
-#include <arpa/inet.h>
-#include <linux/inet_diag.h>
-#include <linux/netlink_diag.h>
-#include <linux/packet_diag.h>
-#ifdef AF_SMC
-# include <linux/smc_diag.h>
-#endif
-#include <linux/sock_diag.h>
-#include <linux/unix_diag.h>
-
-#include "xlat/inet_diag_attrs.h"
-#include "xlat/inet_diag_extended_flags.h"
-#include "xlat/inet_diag_req_attrs.h"
-
-#include "xlat/tcp_states.h"
-#include "xlat/tcp_state_flags.h"
-
-#include "xlat/netlink_diag_attrs.h"
-#include "xlat/netlink_diag_show.h"
-#include "xlat/netlink_socket_flags.h"
-#include "xlat/netlink_states.h"
-
-#include "xlat/packet_diag_attrs.h"
-#include "xlat/packet_diag_show.h"
-
-#ifdef AF_SMC
-# include "xlat/smc_diag_attrs.h"
-# include "xlat/smc_diag_extended_flags.h"
-# include "xlat/smc_states.h"
-#endif
-
-#include "xlat/unix_diag_attrs.h"
-#include "xlat/unix_diag_show.h"
-
-#define PRINT_FIELD_U(prefix_, where_, field_)                         \
-       tprintf("%s%s=%llu", (prefix_), #field_,                        \
-               zero_extend_signed_to_ull((where_).field_))
-
-#define PRINT_FIELD_X(prefix_, where_, field_)                         \
-       tprintf("%s%s=%#llx", (prefix_), #field_,                       \
-               zero_extend_signed_to_ull((where_).field_))
-
-#define PRINT_FIELD_COOKIE(prefix_, where_, field_)                    \
-       tprintf("%s%s=[%llu, %llu]", (prefix_), #field_,                \
-               zero_extend_signed_to_ull((where_).field_[0]),          \
-               zero_extend_signed_to_ull((where_).field_[1]))
-
-#define PRINT_FIELD_FLAGS(prefix_, where_, field_, xlat_, dflt_)       \
-       do {                                                            \
-               tprintf("%s%s=", (prefix_), #field_);                   \
-               printflags((xlat_), (where_).field_, (dflt_));          \
-       } while (0)
-
-#define PRINT_FIELD_XVAL(prefix_, where_, field_, xlat_, dflt_)                \
-       do {                                                            \
-               tprintf("%s%s=", (prefix_), #field_);                   \
-               printxval((xlat_), (where_).field_, (dflt_));           \
-       } while (0)
+#include "netlink_sock_diag.h"
 
 static void
 decode_family(struct tcb *const tcp, const uint8_t family,
-             const kernel_ulong_t addr, const kernel_ulong_t len)
+             const kernel_ulong_t addr, const unsigned int len)
 {
        tprints("{family=");
        printxval(addrfams, family, "AF_???");
        if (len > sizeof(family)) {
                tprints(", ");
-               printstrn(tcp, addr + sizeof(family),
-                         len - sizeof(family));
-       }
-       tprints("}");
-}
-
-static void
-decode_unix_diag_req(struct tcb *const tcp,
-                    const struct nlmsghdr *const nlmsghdr,
-                    const uint8_t family,
-                    const kernel_ulong_t addr,
-                    const kernel_ulong_t len)
-{
-       struct unix_diag_req req = { .sdiag_family = family };
-       const size_t offset = sizeof(req.sdiag_family);
-
-       PRINT_FIELD_XVAL("{", req, sdiag_family, addrfams, "AF_???");
-       tprints(", ");
-       if (len >= sizeof(req)) {
-               if (!umoven_or_printaddr(tcp, addr + offset,
-                                        sizeof(req) - offset,
-                                        (void *) &req + offset)) {
-                       PRINT_FIELD_U("", req, sdiag_protocol);
-                       PRINT_FIELD_FLAGS(", ", req, udiag_states,
-                                         tcp_state_flags, "1<<TCP_???");
-                       PRINT_FIELD_U(", ", req, udiag_ino);
-                       PRINT_FIELD_FLAGS(", ", req, udiag_show,
-                                         unix_diag_show, "UDIAG_SHOW_???");
-                       PRINT_FIELD_COOKIE(", ", req, udiag_cookie);
-               }
-       } else
-               tprints("...");
-       tprints("}");
-}
-
-static bool
-print_meminfo(struct tcb *const tcp,
-             void *const elem_buf,
-             const size_t elem_size,
-             void *const opaque_data)
-{
-       tprintf("%" PRIu32, *(uint32_t *) elem_buf);
-
-       return true;
-}
-
-static bool
-decode_meminfo(struct tcb *const tcp,
-              const kernel_ulong_t addr,
-              const kernel_ulong_t len,
-              const void *const opaque_data)
-{
-       uint32_t mem;
-       size_t nmemb = len / sizeof(mem);
-
-       if (!nmemb)
-               return false;
-
-       if (nmemb > SK_MEMINFO_VARS)
-               nmemb = SK_MEMINFO_VARS;
-
-       print_array(tcp, addr, nmemb, &mem, sizeof(mem),
-                   umoven_or_printaddr, print_meminfo, 0);
-
-       return true;
-}
-
-static void
-decode_unix_diag_msg(struct tcb *const tcp,
-                    const struct nlmsghdr *const nlmsghdr,
-                    const uint8_t family,
-                    const kernel_ulong_t addr,
-                    const kernel_ulong_t len)
-{
-       struct unix_diag_msg msg = { .udiag_family = family };
-       size_t offset = sizeof(msg.udiag_family);
-       bool decode_nla = false;
-
-       PRINT_FIELD_XVAL("{", msg, udiag_family, addrfams, "AF_???");
-       tprints(", ");
-       if (len >= sizeof(msg)) {
-               if (!umoven_or_printaddr(tcp, addr + offset,
-                                        sizeof(msg) - offset,
-                                        (void *) &msg + offset)) {
-                       PRINT_FIELD_XVAL("", msg, udiag_type,
-                                        socktypes, "SOCK_???");
-                       PRINT_FIELD_XVAL(", ", msg, udiag_state,
-                                        tcp_states, "TCP_???");
-                       PRINT_FIELD_U(", ", msg, udiag_ino);
-                       PRINT_FIELD_COOKIE(", ", msg, udiag_cookie);
-                       decode_nla = true;
-               }
-       } else
-               tprints("...");
-       tprints("}");
-
-       offset = NLMSG_ALIGN(sizeof(msg));
-       if (decode_nla && len > offset) {
-               tprints(", ");
-               decode_nlattr(tcp, addr + offset, len - offset,
-                             unix_diag_attrs, "UNIX_DIAG_???",
-                             NULL, 0, NULL);
-       }
-}
-
-static void
-decode_netlink_diag_req(struct tcb *const tcp,
-                       const struct nlmsghdr *const nlmsghdr,
-                       const uint8_t family,
-                       const kernel_ulong_t addr,
-                       const kernel_ulong_t len)
-{
-       struct netlink_diag_req req = { .sdiag_family = family };
-       const size_t offset = sizeof(req.sdiag_family);
-
-       PRINT_FIELD_XVAL("{", req, sdiag_family, addrfams, "AF_???");
-       tprints(", ");
-       if (len >= sizeof(req)) {
-               if (!umoven_or_printaddr(tcp, addr + offset,
-                                        sizeof(req) - offset,
-                                        (void *) &req + offset)) {
-                       if (NDIAG_PROTO_ALL == req.sdiag_protocol)
-                               tprintf("%s=%s",
-                                       "sdiag_protocol", "NDIAG_PROTO_ALL");
-                       else
-                               PRINT_FIELD_XVAL("", req, sdiag_protocol,
-                                                netlink_protocols,
-                                                "NETLINK_???");
-                       PRINT_FIELD_U(", ", req, ndiag_ino);
-                       PRINT_FIELD_FLAGS(", ", req, ndiag_show,
-                                         netlink_diag_show, "NDIAG_SHOW_???");
-                       PRINT_FIELD_COOKIE(", ", req, ndiag_cookie);
-               }
-       } else
-               tprints("...");
-       tprints("}");
-}
-
-static bool
-print_group(struct tcb *tcp, void *elem_buf,
-           size_t elem_size, void *opaque_data)
-{
-       if (elem_size < sizeof(kernel_ulong_t))
-               tprintf("%#0*x", (int) elem_size * 2 + 2,
-                       *(unsigned int *) elem_buf);
-       else
-               tprintf("%#0*" PRI_klx, (int) elem_size * 2 + 2,
-                       *(kernel_ulong_t *) elem_buf);
-
-       return true;
-}
-
-static bool
-decode_netlink_diag_groups(struct tcb *tcp, kernel_ulong_t addr,
-                          kernel_ulong_t len, const void *const opaque_data)
-{
-       kernel_ulong_t buf;
-       size_t nmemb = len / current_wordsize;
-
-       if (!nmemb)
-               return false;
-
-       print_array(tcp, addr, nmemb, &buf, current_wordsize,
-                   umoven_or_printaddr, print_group, 0);
-
-       return true;
-}
-
-static bool
-decode_netlink_diag_ring(struct tcb *tcp, kernel_ulong_t addr,
-                        kernel_ulong_t len, const void *const opaque_data)
-{
-       struct netlink_diag_ring ndr;
-
-       if (len < sizeof(ndr))
-               return false;
-       if (umove_or_printaddr(tcp, addr, &ndr))
-               return true;
-
-       tprintf("{ndr_block_size=%" PRIu32 ", ndr_block_nr=%" PRIu32
-               ", ndr_frame_size=%" PRIu32 ", ndr_frame_nr=%" PRIu32,
-               ndr.ndr_block_size, ndr.ndr_block_nr,
-               ndr.ndr_frame_size, ndr.ndr_frame_nr);
-       tprints("}");
-
-       return true;
-}
-
-static bool
-decode_netlink_diag_flags(struct tcb *tcp, kernel_ulong_t addr,
-                         kernel_ulong_t len, const void *const opaque_data)
-{
-       uint32_t flags;
-
-       if (len < sizeof(flags))
-               return false;
-       if (umove_or_printaddr(tcp, addr, &flags))
-               return true;
-
-       printflags(netlink_socket_flags, flags, "NDIAG_FLAG_???");
-
-       return true;
-}
-
-static const nla_decoder_t netlink_diag_msg_nla_decoders[] = {
-       [NETLINK_DIAG_MEMINFO]  = decode_meminfo,
-       [NETLINK_DIAG_GROUPS]   = decode_netlink_diag_groups,
-       [NETLINK_DIAG_RX_RING]  = decode_netlink_diag_ring,
-       [NETLINK_DIAG_TX_RING]  = decode_netlink_diag_ring,
-       [NETLINK_DIAG_FLAGS]    = decode_netlink_diag_flags
-};
-
-static void
-decode_netlink_diag_msg(struct tcb *const tcp,
-                       const struct nlmsghdr *const nlmsghdr,
-                       const uint8_t family,
-                       const kernel_ulong_t addr,
-                       const kernel_ulong_t len)
-{
-       struct netlink_diag_msg msg = { .ndiag_family = family };
-       size_t offset = sizeof(msg.ndiag_family);
-       bool decode_nla = false;
-
-       PRINT_FIELD_XVAL("{", msg, ndiag_family, addrfams, "AF_???");
-       tprints(", ");
-       if (len >= sizeof(msg)) {
-               if (!umoven_or_printaddr(tcp, addr + offset,
-                                        sizeof(msg) - offset,
-                                        (void *) &msg + offset)) {
-                       PRINT_FIELD_XVAL("", msg, ndiag_type,
-                                        socktypes, "SOCK_???");
-                       PRINT_FIELD_XVAL(", ", msg, ndiag_protocol,
-                                        netlink_protocols, "NETLINK_???");
-                       PRINT_FIELD_XVAL(", ", msg, ndiag_state,
-                                        netlink_states, "NETLINK_???");
-                       PRINT_FIELD_U(", ", msg, ndiag_portid);
-                       PRINT_FIELD_U(", ", msg, ndiag_dst_portid);
-                       PRINT_FIELD_U(", ", msg, ndiag_dst_group);
-                       PRINT_FIELD_U(", ", msg, ndiag_ino);
-                       PRINT_FIELD_COOKIE(", ", msg, ndiag_cookie);
-                       decode_nla = true;
-               }
-       } else
-               tprints("...");
-       tprints("}");
-
-       offset = NLA_ALIGN(sizeof(msg));
-       if (decode_nla && len > offset) {
-               tprints(", ");
-               decode_nlattr(tcp, addr + offset, len - offset,
-                             netlink_diag_attrs, "NETLINK_DIAG_???",
-                             netlink_diag_msg_nla_decoders,
-                             ARRAY_SIZE(netlink_diag_msg_nla_decoders), NULL);
-       }
-}
-
-static void
-decode_packet_diag_req(struct tcb *const tcp,
-                      const struct nlmsghdr *const nlmsghdr,
-                      const uint8_t family,
-                      const kernel_ulong_t addr,
-                      const kernel_ulong_t len)
-{
-       struct packet_diag_req req = { .sdiag_family = family };
-       const size_t offset = sizeof(req.sdiag_family);
-
-       PRINT_FIELD_XVAL("{", req, sdiag_family, addrfams, "AF_???");
-       tprints(", ");
-       if (len >= sizeof(req)) {
-               if (!umoven_or_printaddr(tcp, addr + offset,
-                                        sizeof(req) - offset,
-                                        (void *) &req + offset)) {
-                       PRINT_FIELD_XVAL("", req, sdiag_protocol,
-                                        ethernet_protocols, "ETH_P_???");
-                       PRINT_FIELD_U(", ", req, pdiag_ino);
-                       PRINT_FIELD_FLAGS(", ", req, pdiag_show,
-                                         packet_diag_show, "PACKET_SHOW_???");
-                       PRINT_FIELD_COOKIE(", ", req, pdiag_cookie);
-               }
-       } else
-               tprints("...");
-       tprints("}");
-}
-
-static void
-decode_packet_diag_msg(struct tcb *const tcp,
-                      const struct nlmsghdr *const nlmsghdr,
-                      const uint8_t family,
-                      const kernel_ulong_t addr,
-                      const kernel_ulong_t len)
-{
-       struct packet_diag_msg msg = { .pdiag_family = family };
-       size_t offset = sizeof(msg.pdiag_family);
-       bool decode_nla = false;
-
-       PRINT_FIELD_XVAL("{", msg, pdiag_family, addrfams, "AF_???");
-       tprints(", ");
-       if (len >= sizeof(msg)) {
-               if (!umoven_or_printaddr(tcp, addr + offset,
-                                        sizeof(msg) - offset,
-                                        (void *) &msg + offset)) {
-                       PRINT_FIELD_XVAL("", msg, pdiag_type,
-                                        socktypes, "SOCK_???");
-                       PRINT_FIELD_U(", ", msg, pdiag_num);
-                       PRINT_FIELD_U(", ", msg, pdiag_ino);
-                       PRINT_FIELD_COOKIE(", ", msg, pdiag_cookie);
-                       decode_nla = true;
-               }
-       } else
-               tprints("...");
-       tprints("}");
-
-       offset = NLA_ALIGN(sizeof(msg));
-       if (decode_nla && len > offset) {
-               tprints(", ");
-               decode_nlattr(tcp, addr + offset, len - offset,
-                             packet_diag_attrs, "PACKET_DIAG_???",
-                             NULL, 0, NULL);
-       }
-}
-
-static void
-print_inet_diag_sockid(const struct inet_diag_sockid *id, const uint8_t family)
-{
-       tprintf("{idiag_sport=htons(%u), idiag_dport=htons(%u)",
-               ntohs(id->idiag_sport), ntohs(id->idiag_dport));
-
-       tprints(", ");
-       print_inet_addr(family, id->idiag_src,
-                       sizeof(id->idiag_src), "idiag_src");
-       tprints(", ");
-       print_inet_addr(family, id->idiag_dst,
-                       sizeof(id->idiag_dst), "idiag_dst");
-
-       tprints(", idiag_if=");
-       print_ifindex(id->idiag_if);
-
-       PRINT_FIELD_COOKIE(", ", *id, idiag_cookie);
-
-       tprints("}");
-}
-
-static void
-decode_inet_diag_req_compat(struct tcb *const tcp,
-                           const struct nlmsghdr *const nlmsghdr,
-                           const uint8_t family,
-                           const kernel_ulong_t addr,
-                           const kernel_ulong_t len)
-{
-       struct inet_diag_req req = { .idiag_family = family };
-       size_t offset = sizeof(req.idiag_family);
-       bool decode_nla = false;
-
-       PRINT_FIELD_XVAL("{", req, idiag_family, addrfams, "AF_???");
-       tprints(", ");
-       if (len >= sizeof(req)) {
-               if (!umoven_or_printaddr(tcp, addr + offset,
-                                        sizeof(req) - offset,
-                                        (void *) &req + offset)) {
-                       PRINT_FIELD_U("", req, idiag_src_len);
-                       PRINT_FIELD_U(", ", req, idiag_dst_len);
-                       PRINT_FIELD_FLAGS(", ", req, idiag_ext,
-                                         inet_diag_extended_flags,
-                                         "1<<INET_DIAG_\?\?\?-1");
-                       tprints(", id=");
-                       print_inet_diag_sockid(&req.id, req.idiag_family);
-                       PRINT_FIELD_FLAGS(", ", req, idiag_states,
-                                         tcp_state_flags, "1<<TCP_???");
-                       PRINT_FIELD_U(", ", req, idiag_dbs);
-                       decode_nla = true;
-               }
-       } else
-               tprints("...");
-       tprints("}");
-
-       offset = NLA_ALIGN(sizeof(req));
-       if (decode_nla && len > offset) {
-               tprints(", ");
-               decode_nlattr(tcp, addr + offset, len - offset,
-                             inet_diag_req_attrs, "INET_DIAG_REQ_???",
-                             NULL, 0, NULL);
-       }
-}
-
-static void
-decode_inet_diag_req_v2(struct tcb *const tcp,
-                       const struct nlmsghdr *const nlmsghdr,
-                       const uint8_t family,
-                       const kernel_ulong_t addr,
-                       const kernel_ulong_t len)
-{
-       struct inet_diag_req_v2 req = { .sdiag_family = family };
-       size_t offset = sizeof(req.sdiag_family);
-       bool decode_nla = false;
-
-       PRINT_FIELD_XVAL("{", req, sdiag_family, addrfams, "AF_???");
-       tprints(", ");
-       if (len >= sizeof(req)) {
-               if (!umoven_or_printaddr(tcp, addr + offset,
-                                        sizeof(req) - offset,
-                                        (void *) &req + offset)) {
-                       PRINT_FIELD_XVAL("", req, sdiag_protocol,
-                                        inet_protocols, "IPPROTO_???");
-                       PRINT_FIELD_FLAGS(", ", req, idiag_ext,
-                                         inet_diag_extended_flags,
-                                         "1<<INET_DIAG_\?\?\?-1");
-                       PRINT_FIELD_FLAGS(", ", req, idiag_states,
-                                         tcp_state_flags, "1<<TCP_???");
-                       tprints(", id=");
-                       print_inet_diag_sockid(&req.id, req.sdiag_family);
-                       decode_nla = true;
-               }
-       } else
-               tprints("...");
-       tprints("}");
-
-       offset = NLA_ALIGN(sizeof(req));
-       if (decode_nla && len > offset) {
-               tprints(", ");
-               decode_nlattr(tcp, addr + offset, len - offset,
-                             inet_diag_req_attrs, "INET_DIAG_REQ_???",
-                             NULL, 0, NULL);
+               printstr_ex(tcp, addr + sizeof(family),
+                           len - sizeof(family), QUOTE_FORCE_HEX);
        }
-}
-
-static void
-decode_inet_diag_req(struct tcb *const tcp,
-                    const struct nlmsghdr *const nlmsghdr,
-                    const uint8_t family,
-                    const kernel_ulong_t addr,
-                    const kernel_ulong_t len)
-{
-       if (nlmsghdr->nlmsg_type == TCPDIAG_GETSOCK
-           || nlmsghdr->nlmsg_type == DCCPDIAG_GETSOCK)
-               return decode_inet_diag_req_compat(tcp, nlmsghdr,
-                                                  family, addr, len);
-       else
-               return decode_inet_diag_req_v2(tcp, nlmsghdr,
-                                              family, addr, len);
-}
-
-static bool
-decode_inet_diag_meminfo(struct tcb *const tcp,
-                        const kernel_ulong_t addr,
-                        const kernel_ulong_t len,
-                        const void *const opaque_data)
-{
-       struct inet_diag_meminfo minfo;
-
-       if (len < sizeof(minfo))
-               return false;
-       if (umove_or_printaddr(tcp, addr, &minfo))
-               return true;
-
-       PRINT_FIELD_U("{", minfo, idiag_rmem);
-       PRINT_FIELD_U(", ", minfo, idiag_wmem);
-       PRINT_FIELD_U(", ", minfo, idiag_fmem);
-       PRINT_FIELD_U(", ", minfo, idiag_tmem);
        tprints("}");
-
-       return true;
 }
 
-static bool
-decode_tcpvegas_info(struct tcb *const tcp,
-                    const kernel_ulong_t addr,
-                    const kernel_ulong_t len,
-                    const void *const opaque_data)
-{
-       struct tcpvegas_info vegas;
-
-       if (len < sizeof(vegas))
-               return false;
-       if (umove_or_printaddr(tcp, addr, &vegas))
-               return true;
-
-       PRINT_FIELD_U("{", vegas, tcpv_enabled);
-       PRINT_FIELD_U(", ", vegas, tcpv_rttcnt);
-       PRINT_FIELD_U(", ", vegas, tcpv_rtt);
-       PRINT_FIELD_U(", ", vegas, tcpv_minrtt);
-       tprints("}");
-
-       return true;
-}
-
-static bool
-decode_tcp_dctcp_info(struct tcb *const tcp,
-                     const kernel_ulong_t addr,
-                     const kernel_ulong_t len,
-                     const void *const opaque_data)
-{
-       struct tcp_dctcp_info dctcp;
-
-       if (len < sizeof(dctcp))
-               return false;
-       if (umove_or_printaddr(tcp, addr, &dctcp))
-               return true;
-
-       PRINT_FIELD_U("{", dctcp, dctcp_enabled);
-       PRINT_FIELD_U(", ", dctcp, dctcp_ce_state);
-       PRINT_FIELD_U(", ", dctcp, dctcp_alpha);
-       PRINT_FIELD_U(", ", dctcp, dctcp_ab_ecn);
-       PRINT_FIELD_U(", ", dctcp, dctcp_ab_tot);
-       tprints("}");
-
-       return true;
-}
-
-static bool
-decode_tcp_bbr_info(struct tcb *const tcp,
-                   const kernel_ulong_t addr,
-                   const kernel_ulong_t len,
-                   const void *const opaque_data)
-{
-       struct tcp_bbr_info bbr;
-
-       if (len < sizeof(bbr))
-               return false;
-       if (umove_or_printaddr(tcp, addr, &bbr))
-               return true;
-
-       PRINT_FIELD_X("{", bbr, bbr_bw_lo);
-       PRINT_FIELD_X(", ", bbr, bbr_bw_hi);
-       PRINT_FIELD_U(", ", bbr, bbr_min_rtt);
-       PRINT_FIELD_U(", ", bbr, bbr_pacing_gain);
-       PRINT_FIELD_U(", ", bbr, bbr_cwnd_gain);
-       tprints("}");
-
-       return true;
-}
-
-static const nla_decoder_t inet_diag_msg_nla_decoders[] = {
-       [INET_DIAG_MEMINFO]     = decode_inet_diag_meminfo,
-       [INET_DIAG_INFO]        = NULL,                 /* unimplemented */
-       [INET_DIAG_VEGASINFO]   = decode_tcpvegas_info,
-       [INET_DIAG_CONG]        = decode_nla_str,
-       [INET_DIAG_TOS]         = decode_nla_u8,
-       [INET_DIAG_TCLASS]      = decode_nla_u8,
-       [INET_DIAG_SKMEMINFO]   = decode_meminfo,
-       [INET_DIAG_SHUTDOWN]    = decode_nla_u8,
-       [INET_DIAG_DCTCPINFO]   = decode_tcp_dctcp_info,
-       [INET_DIAG_PROTOCOL]    = decode_nla_u8,
-       [INET_DIAG_SKV6ONLY]    = decode_nla_u8,
-       [INET_DIAG_LOCALS]      = NULL,                 /* unimplemented */
-       [INET_DIAG_PEERS]       = NULL,                 /* unimplemented */
-       [INET_DIAG_PAD]         = NULL,
-       [INET_DIAG_MARK]        = decode_nla_u32,
-       [INET_DIAG_BBRINFO]     = decode_tcp_bbr_info
-};
-
-static void
-decode_inet_diag_msg(struct tcb *const tcp,
-                    const struct nlmsghdr *const nlmsghdr,
-                    const uint8_t family,
-                    const kernel_ulong_t addr,
-                    const kernel_ulong_t len)
-{
-       struct inet_diag_msg msg = { .idiag_family = family };
-       size_t offset = sizeof(msg.idiag_family);
-       bool decode_nla = false;
-
-       PRINT_FIELD_XVAL("{", msg, idiag_family, addrfams, "AF_???");
-       tprints(", ");
-       if (len >= sizeof(msg)) {
-               if (!umoven_or_printaddr(tcp, addr + offset,
-                                        sizeof(msg) - offset,
-                                        (void *) &msg + offset)) {
-                       PRINT_FIELD_XVAL("", msg, idiag_state,
-                                        tcp_states, "TCP_???");
-                       PRINT_FIELD_U(", ", msg, idiag_timer);
-                       PRINT_FIELD_U(", ", msg, idiag_retrans);
-                       tprints(", id=");
-                       print_inet_diag_sockid(&msg.id, msg.idiag_family);
-                       PRINT_FIELD_U(", ", msg, idiag_expires);
-                       PRINT_FIELD_U(", ", msg, idiag_rqueue);
-                       PRINT_FIELD_U(", ", msg, idiag_wqueue);
-                       PRINT_FIELD_U(", ", msg, idiag_uid);
-                       PRINT_FIELD_U(", ", msg, idiag_inode);
-                       decode_nla = true;
-               }
-       } else
-               tprints("...");
-       tprints("}");
-
-       offset = NLA_ALIGN(sizeof(msg));
-       if (decode_nla && len > offset) {
-               tprints(", ");
-               decode_nlattr(tcp, addr + offset, len - offset,
-                             inet_diag_attrs, "INET_DIAG_???",
-                             inet_diag_msg_nla_decoders,
-                             ARRAY_SIZE(inet_diag_msg_nla_decoders), NULL);
-       }
-}
-
-#ifdef AF_SMC
-static void
-decode_smc_diag_req(struct tcb *const tcp,
-                   const struct nlmsghdr *const nlmsghdr,
-                   const uint8_t family,
-                   const kernel_ulong_t addr,
-                   const kernel_ulong_t len)
-{
-       struct smc_diag_req req = { .diag_family = family };
-       const size_t offset = sizeof(req.diag_family);
-
-       PRINT_FIELD_XVAL("{", req, diag_family, addrfams, "AF_???");
-       tprints(", ");
-       if (len >= sizeof(req)) {
-               if (!umoven_or_printaddr(tcp, addr + offset,
-                                        sizeof(req) - offset,
-                                        (void *) &req + offset)) {
-                       PRINT_FIELD_FLAGS("", req, diag_ext,
-                                         smc_diag_extended_flags,
-                                         "1<<SMC_DIAG_\?\?\?-1");
-                       tprints(", id=");
-                       /*
-                        * AF_SMC protocol family socket handler
-                        * keeping the AF_INET sock address.
-                        */
-                       print_inet_diag_sockid(&req.id, AF_INET);
-               }
-       } else
-               tprints("...");
-       tprints("}");
-}
-
-static void
-decode_smc_diag_msg(struct tcb *const tcp,
-                   const struct nlmsghdr *const nlmsghdr,
-                   const uint8_t family,
-                   const kernel_ulong_t addr,
-                   const kernel_ulong_t len)
-{
-       struct smc_diag_msg msg = { .diag_family = family };
-       size_t offset = sizeof(msg.diag_family);
-       bool decode_nla = false;
-
-       PRINT_FIELD_XVAL("{", msg, diag_family, addrfams, "AF_???");
-       tprints(", ");
-       if (len >= sizeof(msg)) {
-               if (!umoven_or_printaddr(tcp, addr + offset,
-                                        sizeof(msg) - offset,
-                                        (void *) &msg + offset)) {
-                       PRINT_FIELD_XVAL("", msg, diag_state,
-                                        smc_states, "SMC_???");
-                       PRINT_FIELD_U(", ", msg, diag_fallback);
-                       PRINT_FIELD_U(", ", msg, diag_shutdown);
-                       tprints(", id=");
-                       /*
-                        * AF_SMC protocol family socket handler
-                        * keeping the AF_INET sock address.
-                        */
-                       print_inet_diag_sockid(&msg.id, AF_INET);
-                       PRINT_FIELD_U(", ", msg, diag_uid);
-                       PRINT_FIELD_U(", ", msg, diag_inode);
-                       decode_nla = true;
-               }
-       } else
-               tprints("...");
-       tprints("}");
-
-       offset = NLA_ALIGN(sizeof(msg));
-       if (decode_nla && len > offset) {
-               tprints(", ");
-               decode_nlattr(tcp, addr + offset, len - offset,
-                             smc_diag_attrs, "SMC_DIAG_???",
-                             NULL, 0, NULL);
-       }
-}
-#endif
-
-typedef void (*netlink_diag_decoder_t)(struct tcb *,
-                                      const struct nlmsghdr *,
-                                      uint8_t family,
-                                      kernel_ulong_t addr,
-                                      kernel_ulong_t len);
+typedef DECL_NETLINK_DIAG_DECODER((*netlink_diag_decoder_t));
 
 static const struct {
        const netlink_diag_decoder_t request, response;
@@ -792,7 +64,7 @@ bool
 decode_netlink_sock_diag(struct tcb *const tcp,
                         const struct nlmsghdr *const nlmsghdr,
                         const kernel_ulong_t addr,
-                        const kernel_ulong_t len)
+                        const unsigned int len)
 {
        uint8_t family;