]> granicus.if.org Git - strace/blobdiff - net.c
Mpersify RTC_* ioctl parser
[strace] / net.c
diff --git a/net.c b/net.c
index fc325df013c4b77f5bb8d682f5e546fe7f2b28ba..3349758e3503a250860e5c911accfc10f69ea46d 100644 (file)
--- a/net.c
+++ b/net.c
 # include <linux/ipx.h>
 #endif
 
+#if defined(HAVE_LINUX_IP_VS_H)
+# include <linux/ip_vs.h>
+#endif
 #if defined(HAVE_LINUX_NETLINK_H)
 # include <linux/netlink.h>
 #endif
+#if defined(HAVE_LINUX_NETFILTER_ARP_ARP_TABLES_H)
+# include <linux/netfilter_arp/arp_tables.h>
+#endif
+#if defined(HAVE_LINUX_NETFILTER_BRIDGE_EBTABLES_H)
+# include <linux/netfilter_bridge/ebtables.h>
+#endif
+#if defined(HAVE_LINUX_NETFILTER_IPV4_IP_TABLES_H)
+# include <linux/netfilter_ipv4/ip_tables.h>
+#endif
+#if defined(HAVE_LINUX_NETFILTER_IPV6_IP6_TABLES_H)
+# include <linux/netfilter_ipv6/ip6_tables.h>
+#endif
 #if defined(HAVE_LINUX_IF_PACKET_H)
 # include <linux/if_packet.h>
 #endif
 # include <bluetooth/rfcomm.h>
 # include <bluetooth/sco.h>
 #endif
-#ifndef PF_UNSPEC
-# define PF_UNSPEC AF_UNSPEC
-#endif
 
-#include "xlat/domains.h"
 #include "xlat/addrfams.h"
 #include "xlat/socktypes.h"
 #include "xlat/sock_type_flags.h"
 # define SOCK_TYPE_MASK 0xf
 #endif
 
-#ifndef SOL_IP
-# define SOL_IP 0
-#endif
-#ifndef SOL_TCP
-# define SOL_TCP 6
-#endif
-#ifndef SOL_UDP
-# define SOL_UDP 17
-#endif
-#ifndef SOL_IPV6
-# define SOL_IPV6 41
-#endif
-#ifndef SOL_ICMPV6
-# define SOL_ICMPV6 58
-#endif
-#ifndef SOL_SCTP
-# define SOL_SCTP 132
-#endif
-#ifndef SOL_UDPLITE
-# define SOL_UDPLITE 136
-#endif
-#ifndef SOL_RAW
-# define SOL_RAW 255
-#endif
-#ifndef SOL_IPX
-# define SOL_IPX 256
-#endif
-#ifndef SOL_AX25
-# define SOL_AX25 257
-#endif
-#ifndef SOL_ATALK
-# define SOL_ATALK 258
-#endif
-#ifndef SOL_NETROM
-# define SOL_NETROM 259
-#endif
-#ifndef SOL_ROSE
-# define SOL_ROSE 260
-#endif
-#ifndef SOL_DECNET
-# define SOL_DECNET 261
-#endif
-#ifndef SOL_X25
-# define SOL_X25 262
-#endif
-#ifndef SOL_PACKET
-# define SOL_PACKET 263
-#endif
-#ifndef SOL_ATM
-# define SOL_ATM 264
-#endif
-#ifndef SOL_AAL
-# define SOL_AAL 265
-#endif
-#ifndef SOL_IRDA
-# define SOL_IRDA 266
-#endif
-#ifndef SOL_NETBEUI
-# define SOL_NETBEUI 267
-#endif
-#ifndef SOL_LLC
-# define SOL_LLC 268
-#endif
-#ifndef SOL_DCCP
-# define SOL_DCCP 269
-#endif
-#ifndef SOL_NETLINK
-# define SOL_NETLINK 270
-#endif
-#ifndef SOL_TIPC
-# define SOL_TIPC 271
-#endif
-#ifndef SOL_RXRPC
-# define SOL_RXRPC 272
-#endif
-#ifndef SOL_PPPOL2TP
-# define SOL_PPPOL2TP 273
-#endif
-#ifndef SOL_BLUETOOTH
-# define SOL_BLUETOOTH 274
-#endif
-#ifndef SOL_PNPIPE
-# define SOL_PNPIPE 275
-#endif
-#ifndef SOL_RDS
-# define SOL_RDS 276
-#endif
-#ifndef SOL_IUCV
-# define SOL_IUCV 277
-#endif
-#ifndef SOL_CAIF
-# define SOL_CAIF 278
-#endif
-#ifndef SOL_ALG
-# define SOL_ALG 279
-#endif
-#ifndef SOL_NFC
-# define SOL_NFC 280
-#endif
 #include "xlat/socketlayers.h"
 
 #include "xlat/inet_protocols.h"
 
-#ifdef PF_NETLINK
+#ifdef AF_NETLINK
 # if !defined NETLINK_SOCK_DIAG && defined NETLINK_INET_DIAG
 #  define NETLINK_SOCK_DIAG NETLINK_INET_DIAG
 # endif
@@ -216,94 +128,79 @@ print_ifindex(unsigned int ifindex)
        tprintf("%u", ifindex);
 }
 
-void
-printsock(struct tcb *tcp, long addr, int addrlen)
-{
-       union {
-               char pad[128];
-               struct sockaddr sa;
-               struct sockaddr_in sin;
-               struct sockaddr_un sau;
+typedef union {
+       char pad[128];
+       struct sockaddr sa;
+       struct sockaddr_in sin;
+       struct sockaddr_un sau;
 #ifdef HAVE_INET_NTOP
-               struct sockaddr_in6 sa6;
+       struct sockaddr_in6 sa6;
 #endif
 #if defined(AF_IPX)
-               struct sockaddr_ipx sipx;
+       struct sockaddr_ipx sipx;
 #endif
 #ifdef AF_PACKET
-               struct sockaddr_ll ll;
+       struct sockaddr_ll ll;
 #endif
 #ifdef AF_NETLINK
-               struct sockaddr_nl nl;
+       struct sockaddr_nl nl;
 #endif
 #ifdef HAVE_BLUETOOTH_BLUETOOTH_H
-               struct sockaddr_hci hci;
-               struct sockaddr_l2 l2;
-               struct sockaddr_rc rc;
-               struct sockaddr_sco sco;
+       struct sockaddr_hci hci;
+       struct sockaddr_l2 l2;
+       struct sockaddr_rc rc;
+       struct sockaddr_sco sco;
 #endif
-       } addrbuf;
-       char string_addr[100];
-
-       if (addr == 0) {
-               tprints("NULL");
-               return;
-       }
-       if (!verbose(tcp)) {
-               tprintf("%#lx", addr);
-               return;
-       }
-
-       if (addrlen < 2 || addrlen > (int) sizeof(addrbuf))
-               addrlen = sizeof(addrbuf);
-
-       memset(&addrbuf, 0, sizeof(addrbuf));
-       if (umoven(tcp, addr, addrlen, addrbuf.pad) < 0) {
-               tprints("{...}");
-               return;
-       }
-       addrbuf.pad[sizeof(addrbuf.pad) - 1] = '\0';
+} sockaddr_buf_t;
 
+static void
+print_sockaddr(struct tcb *tcp, const sockaddr_buf_t *addr, const int addrlen)
+{
        tprints("{sa_family=");
-       printxval(addrfams, addrbuf.sa.sa_family, "AF_???");
+       printxval(addrfams, addr->sa.sa_family, "AF_???");
        tprints(", ");
 
-       switch (addrbuf.sa.sa_family) {
+       switch (addr->sa.sa_family) {
        case AF_UNIX:
                if (addrlen == 2) {
                        tprints("NULL");
-               } else if (addrbuf.sau.sun_path[0]) {
+               } else if (addr->sau.sun_path[0]) {
                        tprints("sun_path=");
-                       print_quoted_string(addrbuf.sau.sun_path,
-                                           sizeof(addrbuf.sau.sun_path) + 1,
+                       print_quoted_string(addr->sau.sun_path,
+                                           sizeof(addr->sau.sun_path) + 1,
                                            QUOTE_0_TERMINATED);
                } else {
                        tprints("sun_path=@");
-                       print_quoted_string(addrbuf.sau.sun_path + 1,
-                                           sizeof(addrbuf.sau.sun_path),
+                       print_quoted_string(addr->sau.sun_path + 1,
+                                           sizeof(addr->sau.sun_path),
                                            QUOTE_0_TERMINATED);
                }
                break;
        case AF_INET:
                tprintf("sin_port=htons(%u), sin_addr=inet_addr(\"%s\")",
-                       ntohs(addrbuf.sin.sin_port), inet_ntoa(addrbuf.sin.sin_addr));
+                       ntohs(addr->sin.sin_port), inet_ntoa(addr->sin.sin_addr));
                break;
 #ifdef HAVE_INET_NTOP
        case AF_INET6:
-               inet_ntop(AF_INET6, &addrbuf.sa6.sin6_addr, string_addr, sizeof(string_addr));
-               tprintf("sin6_port=htons(%u), inet_pton(AF_INET6, \"%s\", &sin6_addr), sin6_flowinfo=%u",
-                               ntohs(addrbuf.sa6.sin6_port), string_addr,
-                               addrbuf.sa6.sin6_flowinfo);
-#ifdef HAVE_STRUCT_SOCKADDR_IN6_SIN6_SCOPE_ID
-               tprints(", sin6_scope_id=");
-#if defined IN6_IS_ADDR_LINKLOCAL && defined IN6_IS_ADDR_MC_LINKLOCAL
-               if (IN6_IS_ADDR_LINKLOCAL(&addrbuf.sa6.sin6_addr)
-                   || IN6_IS_ADDR_MC_LINKLOCAL(&addrbuf.sa6.sin6_addr))
-                       print_ifindex(addrbuf.sa6.sin6_scope_id);
-               else
-#endif
-                       tprintf("%u", addrbuf.sa6.sin6_scope_id);
-#endif /* HAVE_STRUCT_SOCKADDR_IN6_SIN6_SCOPE_ID */
+               {
+                       char string_addr[100];
+                       inet_ntop(AF_INET6, &addr->sa6.sin6_addr,
+                                 string_addr, sizeof(string_addr));
+                       tprintf("sin6_port=htons(%u), inet_pton(AF_INET6"
+                               ", \"%s\", &sin6_addr), sin6_flowinfo=%u",
+                               ntohs(addr->sa6.sin6_port), string_addr,
+                               addr->sa6.sin6_flowinfo);
+# ifdef HAVE_STRUCT_SOCKADDR_IN6_SIN6_SCOPE_ID
+                       tprints(", sin6_scope_id=");
+#  if defined IN6_IS_ADDR_LINKLOCAL && defined IN6_IS_ADDR_MC_LINKLOCAL
+                       if (IN6_IS_ADDR_LINKLOCAL(&addr->sa6.sin6_addr)
+                           || IN6_IS_ADDR_MC_LINKLOCAL(&addr->sa6.sin6_addr))
+                               print_ifindex(addr->sa6.sin6_scope_id);
+                       else
+#  endif
+                               tprintf("%u", addr->sa6.sin6_scope_id);
+# endif /* HAVE_STRUCT_SOCKADDR_IN6_SIN6_SCOPE_ID */
+               }
                break;
 #endif
 #if defined(AF_IPX)
@@ -311,17 +208,17 @@ printsock(struct tcb *tcp, long addr, int addrlen)
                {
                        int i;
                        tprintf("sipx_port=htons(%u), ",
-                                       ntohs(addrbuf.sipx.sipx_port));
+                                       ntohs(addr->sipx.sipx_port));
                        /* Yes, I know, this does not look too
                         * strace-ish, but otherwise the IPX
                         * addresses just look monstrous...
                         * Anyways, feel free if you don't like
                         * this way.. :)
                         */
-                       tprintf("%08lx:", (unsigned long)ntohl(addrbuf.sipx.sipx_network));
+                       tprintf("%08lx:", (unsigned long)ntohl(addr->sipx.sipx_network));
                        for (i = 0; i < IPX_NODE_LEN; i++)
-                               tprintf("%02x", addrbuf.sipx.sipx_node[i]);
-                       tprintf("/[%02x]", addrbuf.sipx.sipx_type);
+                               tprintf("%02x", addr->sipx.sipx_node[i]);
+                       tprintf("/[%02x]", addr->sipx.sipx_type);
                }
                break;
 #endif /* AF_IPX */
@@ -330,21 +227,21 @@ printsock(struct tcb *tcp, long addr, int addrlen)
                {
                        int i;
                        tprintf("proto=%#04x, if%d, pkttype=",
-                                       ntohs(addrbuf.ll.sll_protocol),
-                                       addrbuf.ll.sll_ifindex);
-                       printxval(af_packet_types, addrbuf.ll.sll_pkttype, "PACKET_???");
+                                       ntohs(addr->ll.sll_protocol),
+                                       addr->ll.sll_ifindex);
+                       printxval(af_packet_types, addr->ll.sll_pkttype, "PACKET_???");
                        tprintf(", addr(%d)={%d, ",
-                                       addrbuf.ll.sll_halen,
-                                       addrbuf.ll.sll_hatype);
-                       for (i = 0; i < addrbuf.ll.sll_halen; i++)
-                               tprintf("%02x", addrbuf.ll.sll_addr[i]);
+                                       addr->ll.sll_halen,
+                                       addr->ll.sll_hatype);
+                       for (i = 0; i < addr->ll.sll_halen; i++)
+                               tprintf("%02x", addr->ll.sll_addr[i]);
                }
                break;
 
 #endif /* AF_PACKET */
 #ifdef AF_NETLINK
        case AF_NETLINK:
-               tprintf("pid=%d, groups=%08x", addrbuf.nl.nl_pid, addrbuf.nl.nl_groups);
+               tprintf("pid=%d, groups=%08x", addr->nl.nl_pid, addr->nl.nl_groups);
                break;
 #endif /* AF_NETLINK */
 #if defined(AF_BLUETOOTH) && defined(HAVE_BLUETOOTH_BLUETOOTH_H)
@@ -353,18 +250,18 @@ printsock(struct tcb *tcp, long addr, int addrlen)
                        "{rc_bdaddr=%02X:%02X:%02X:%02X:%02X:%02X, rc_channel=%d} or "
                        "{l2_psm=htobs(%d), l2_bdaddr=%02X:%02X:%02X:%02X:%02X:%02X, l2_cid=htobs(%d)} or "
                        "{hci_dev=htobs(%d)}",
-                       addrbuf.sco.sco_bdaddr.b[0], addrbuf.sco.sco_bdaddr.b[1],
-                       addrbuf.sco.sco_bdaddr.b[2], addrbuf.sco.sco_bdaddr.b[3],
-                       addrbuf.sco.sco_bdaddr.b[4], addrbuf.sco.sco_bdaddr.b[5],
-                       addrbuf.rc.rc_bdaddr.b[0], addrbuf.rc.rc_bdaddr.b[1],
-                       addrbuf.rc.rc_bdaddr.b[2], addrbuf.rc.rc_bdaddr.b[3],
-                       addrbuf.rc.rc_bdaddr.b[4], addrbuf.rc.rc_bdaddr.b[5],
-                       addrbuf.rc.rc_channel,
-                       btohs(addrbuf.l2.l2_psm), addrbuf.l2.l2_bdaddr.b[0],
-                       addrbuf.l2.l2_bdaddr.b[1], addrbuf.l2.l2_bdaddr.b[2],
-                       addrbuf.l2.l2_bdaddr.b[3], addrbuf.l2.l2_bdaddr.b[4],
-                       addrbuf.l2.l2_bdaddr.b[5], btohs(addrbuf.l2.l2_cid),
-                       btohs(addrbuf.hci.hci_dev));
+                       addr->sco.sco_bdaddr.b[0], addr->sco.sco_bdaddr.b[1],
+                       addr->sco.sco_bdaddr.b[2], addr->sco.sco_bdaddr.b[3],
+                       addr->sco.sco_bdaddr.b[4], addr->sco.sco_bdaddr.b[5],
+                       addr->rc.rc_bdaddr.b[0], addr->rc.rc_bdaddr.b[1],
+                       addr->rc.rc_bdaddr.b[2], addr->rc.rc_bdaddr.b[3],
+                       addr->rc.rc_bdaddr.b[4], addr->rc.rc_bdaddr.b[5],
+                       addr->rc.rc_channel,
+                       btohs(addr->l2.l2_psm), addr->l2.l2_bdaddr.b[0],
+                       addr->l2.l2_bdaddr.b[1], addr->l2.l2_bdaddr.b[2],
+                       addr->l2.l2_bdaddr.b[3], addr->l2.l2_bdaddr.b[4],
+                       addr->l2.l2_bdaddr.b[5], btohs(addr->l2.l2_cid),
+                       btohs(addr->hci.hci_dev));
                break;
 #endif /* AF_BLUETOOTH && HAVE_BLUETOOTH_BLUETOOTH_H */
        /* AF_AX25 AF_APPLETALK AF_NETROM AF_BRIDGE AF_AAL5
@@ -372,18 +269,36 @@ printsock(struct tcb *tcp, long addr, int addrlen)
 
        default:
                tprints("sa_data=");
-               print_quoted_string(addrbuf.sa.sa_data,
-                                   sizeof(addrbuf.sa.sa_data), 0);
+               print_quoted_string(addr->sa.sa_data,
+                                   sizeof(addr->sa.sa_data), 0);
                break;
        }
        tprints("}");
 }
 
-#if HAVE_SENDMSG
-# ifndef SCM_SECURITY
-#  define SCM_SECURITY 0x03
-# endif
-# include "xlat/scmvals.h"
+void
+printsock(struct tcb *tcp, long addr, int addrlen)
+{
+       sockaddr_buf_t addrbuf;
+
+       if (addrlen < 2) {
+               printaddr(addr);
+               return;
+       }
+
+       if (addrlen > (int) sizeof(addrbuf))
+               addrlen = sizeof(addrbuf);
+
+       memset(&addrbuf, 0, sizeof(addrbuf));
+       if (umoven_or_printaddr(tcp, addr, addrlen, addrbuf.pad))
+               return;
+       addrbuf.pad[sizeof(addrbuf.pad) - 1] = '\0';
+
+       print_sockaddr(tcp, &addrbuf, addrlen);
+}
+
+#include "xlat/scmvals.h"
+#include "xlat/ip_cmsg_types.h"
 
 #if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
 struct cmsghdr32 {
@@ -401,54 +316,209 @@ typedef union {
 #endif
 } union_cmsghdr;
 
-static bool
-print_scm_rights(struct tcb *tcp, size_t cmsg_size, char *ptr, size_t cmsg_len)
+static void
+print_scm_rights(struct tcb *tcp, const void *cmsg_data,
+                const size_t data_len)
 {
-       if (cmsg_size + sizeof(int) > cmsg_len)
-               return false;
-
-       int *fds = (int *) (ptr + cmsg_size);
+       const int *fds = cmsg_data;
+       const char *end = (const char *) cmsg_data + data_len;
        bool seen = false;
 
+       if (sizeof(*fds) > data_len)
+               return;
+
        tprints(", [");
-       while ((char *) fds < (ptr + cmsg_len)) {
+       while ((const char *) fds < end) {
                if (seen)
                        tprints(", ");
                else
                        seen = true;
                printfd(tcp, *fds++);
        }
-       tprints("]}");
-       return true;
+       tprints("]");
 }
 
-static bool
-print_scm_creds(struct tcb *tcp, size_t cmsg_size, char *ptr, size_t cmsg_len)
+static void
+print_scm_creds(struct tcb *tcp, const void *cmsg_data,
+               const size_t data_len)
 {
-       if (cmsg_size + sizeof(struct ucred) > cmsg_len)
-               return false;
+       const struct ucred *uc = cmsg_data;
 
-       const struct ucred *uc = (void *) (ptr + cmsg_size);
+       if (sizeof(*uc) > data_len)
+               return;
 
-       tprintf(", {pid=%u, uid=%u, gid=%u}}",
+       tprintf(", {pid=%u, uid=%u, gid=%u}",
                (unsigned) uc->pid, (unsigned) uc->uid, (unsigned) uc->gid);
-       return true;
 }
 
-static bool
-print_scm_security(struct tcb *tcp, size_t cmsg_size, char *ptr, size_t cmsg_len)
+static void
+print_scm_security(struct tcb *tcp, const void *cmsg_data,
+                  const size_t data_len)
 {
-       if (cmsg_size + sizeof(char) > cmsg_len)
-               return false;
-
-       const char *label = (const char *) (ptr + cmsg_size);
-       const size_t label_len = cmsg_len - cmsg_size;
+       if (!data_len)
+               return;
 
        tprints(", ");
-       print_quoted_string(label, label_len, 0);
+       print_quoted_string(cmsg_data, data_len, 0);
+}
+
+static void
+print_cmsg_ip_pktinfo(struct tcb *tcp, const void *cmsg_data,
+                     const size_t data_len)
+{
+       const struct in_pktinfo *info = cmsg_data;
+
+       if (sizeof(*info) > data_len)
+               return;
+
+       tprints(", {ipi_ifindex=");
+       print_ifindex(info->ipi_ifindex);
+       tprintf(", ipi_spec_dst=inet_addr(\"%s\"), ipi_addr=inet_addr(\"%s\")}",
+               inet_ntoa(info->ipi_spec_dst), inet_ntoa(info->ipi_addr));
+}
+
+static void
+print_cmsg_ip_ttl(struct tcb *tcp, const void *cmsg_data,
+                 const size_t data_len)
+{
+       const unsigned int *ttl = cmsg_data;
+
+       if (sizeof(*ttl) > data_len)
+               return;
+
+       tprintf(", {ttl=%u}", *ttl);
+}
+
+static void
+print_cmsg_ip_tos(struct tcb *tcp, const void *cmsg_data,
+                 const size_t data_len)
+{
+       const uint8_t *tos = cmsg_data;
+
+       if (sizeof(*tos) > data_len)
+               return;
+
+       tprintf(", {tos=%x}", *tos);
+}
+
+static void
+print_cmsg_ip_checksum(struct tcb *tcp, const void *cmsg_data,
+                      const size_t data_len)
+{
+       const uint32_t *csum = cmsg_data;
+
+       if (sizeof(*csum) > data_len)
+               return;
+
+       tprintf(", {csum=%u}", *csum);
+}
+
+static void
+print_cmsg_ip_opts(struct tcb *tcp, const void *cmsg_data,
+                  const size_t data_len)
+{
+       const unsigned char *opts = cmsg_data;
+       size_t i;
+
+       if (!data_len)
+               return;
+
+       tprints(", {opts=0x");
+       for (i = 0; i < data_len; ++i)
+               tprintf("%02x", opts[i]);
        tprints("}");
+}
 
-       return true;
+static void
+print_cmsg_ip_recverr(struct tcb *tcp, const void *cmsg_data,
+                     const size_t data_len)
+{
+       const struct {
+               uint32_t ee_errno;
+               uint8_t  ee_origin;
+               uint8_t  ee_type;
+               uint8_t  ee_code;
+               uint8_t  ee_pad;
+               uint32_t ee_info;
+               uint32_t ee_data;
+               struct sockaddr_in offender;
+       } *err = cmsg_data;
+
+       if (sizeof(*err) > data_len)
+               return;
+
+       tprintf(", {ee_errno=%u, ee_origin=%u, ee_type=%u, ee_code=%u"
+               ", ee_info=%u, ee_data=%u, offender=",
+               err->ee_errno, err->ee_origin, err->ee_type,
+               err->ee_code, err->ee_info, err->ee_data);
+       print_sockaddr(tcp, (const void *) &err->offender,
+               sizeof(err->offender));
+       tprints("}");
+}
+
+static void
+print_cmsg_ip_origdstaddr(struct tcb *tcp, const void *cmsg_data,
+                         const size_t data_len)
+{
+       if (sizeof(struct sockaddr_in) > data_len)
+               return;
+
+       tprints(", ");
+       print_sockaddr(tcp, cmsg_data, data_len);
+}
+
+static void
+print_cmsg_type_data(struct tcb *tcp, const int cmsg_level, const int cmsg_type,
+                    const void *cmsg_data, const size_t data_len)
+{
+       switch (cmsg_level) {
+       case SOL_SOCKET:
+               printxval(scmvals, cmsg_type, "SCM_???");
+               switch (cmsg_type) {
+               case SCM_RIGHTS:
+                       print_scm_rights(tcp, cmsg_data, data_len);
+                       break;
+               case SCM_CREDENTIALS:
+                       print_scm_creds(tcp, cmsg_data, data_len);
+                       break;
+               case SCM_SECURITY:
+                       print_scm_security(tcp, cmsg_data, data_len);
+                       break;
+               }
+               break;
+       case SOL_IP:
+               printxval(ip_cmsg_types, cmsg_type, "IP_???");
+               switch (cmsg_type) {
+               case IP_PKTINFO:
+                       print_cmsg_ip_pktinfo(tcp, cmsg_data, data_len);
+                       break;
+               case IP_TTL:
+                       print_cmsg_ip_ttl(tcp, cmsg_data, data_len);
+                       break;
+               case IP_TOS:
+                       print_cmsg_ip_tos(tcp, cmsg_data, data_len);
+                       break;
+               case IP_RECVOPTS:
+               case IP_RETOPTS:
+                       print_cmsg_ip_opts(tcp, cmsg_data, data_len);
+                       break;
+               case IP_RECVERR:
+                       print_cmsg_ip_recverr(tcp, cmsg_data, data_len);
+                       break;
+               case IP_ORIGDSTADDR:
+                       print_cmsg_ip_origdstaddr(tcp, cmsg_data, data_len);
+                       break;
+               case IP_CHECKSUM:
+                       print_cmsg_ip_checksum(tcp, cmsg_data, data_len);
+                       break;
+               case SCM_SECURITY:
+                       print_scm_security(tcp, cmsg_data, data_len);
+                       break;
+               }
+               break;
+       default:
+               tprintf("%u", cmsg_type);
+       }
 }
 
 static void
@@ -462,7 +532,8 @@ printcmsghdr(struct tcb *tcp, unsigned long addr, size_t len)
 
        char *buf = len < cmsg_size ? NULL : malloc(len);
        if (!buf || umoven(tcp, addr, len, buf) < 0) {
-               tprintf(", msg_control=%#lx", addr);
+               tprints(", msg_control=");
+               printaddr(addr);
                free(buf);
                return;
        }
@@ -496,27 +567,11 @@ printcmsghdr(struct tcb *tcp, unsigned long addr, size_t len)
                if (cmsg_len > len)
                        cmsg_len = len;
 
-               if (cmsg_level == SOL_SOCKET) {
-                       printxval(scmvals, cmsg_type, "SCM_???");
-                       switch (cmsg_type) {
-                       case SCM_RIGHTS:
-                               if (print_scm_rights(tcp, cmsg_size, u.ptr, cmsg_len))
-                                       goto next_cmsg;
-                               break;
-                       case SCM_CREDENTIALS:
-                               if (print_scm_creds(tcp, cmsg_size, u.ptr, cmsg_len))
-                                       goto next_cmsg;
-                               break;
-                       case SCM_SECURITY:
-                               if (print_scm_security(tcp, cmsg_size, u.ptr, cmsg_len))
-                                       goto next_cmsg;
-                               break;
-                       }
-               } else {
-                       tprintf("%u", cmsg_type);
-               }
-               tprints(", ...}");
-next_cmsg:
+               print_cmsg_type_data(tcp, cmsg_level, cmsg_type,
+                                    (const void *) (u.ptr + cmsg_size),
+                                    cmsg_len > cmsg_size ? cmsg_len - cmsg_size: 0);
+               tprints("}");
+
                if (cmsg_len < cmsg_size) {
                        len -= cmsg_size;
                        break;
@@ -643,16 +698,16 @@ printmsghdr(struct tcb *tcp, long addr, unsigned long data_size)
        if (verbose(tcp) && extractmsghdr(tcp, addr, &msg))
                do_msghdr(tcp, &msg, data_size);
        else
-               tprintf("%#lx", addr);
+               printaddr(addr);
 }
 
 void
-dumpiov_in_msghdr(struct tcb *tcp, long addr)
+dumpiov_in_msghdr(struct tcb *tcp, long addr, unsigned long data_size)
 {
        struct msghdr msg;
 
        if (extractmsghdr(tcp, addr, &msg))
-               dumpiov(tcp, msg.msg_iovlen, (long)msg.msg_iov);
+               dumpiov_upto(tcp, msg.msg_iovlen, (long)msg.msg_iov, data_size);
 }
 
 static void
@@ -666,7 +721,7 @@ printmmsghdr(struct tcb *tcp, long addr, unsigned int idx, unsigned long msg_len
                tprintf(", %u}", mmsg.msg_len);
        }
        else
-               tprintf("%#lx", addr);
+               printaddr(addr);
 }
 
 static void
@@ -674,7 +729,7 @@ decode_mmsg(struct tcb *tcp, unsigned long msg_len)
 {
        /* mmsgvec */
        if (syserror(tcp)) {
-               tprintf("%#lx", tcp->u_arg[1]);
+               printaddr(tcp->u_arg[1]);
        } else {
                unsigned int len = tcp->u_rval;
                unsigned int i;
@@ -704,19 +759,18 @@ dumpiov_in_mmsghdr(struct tcb *tcp, long addr)
                if (extractmmsghdr(tcp, addr, i, &mmsg)) {
                        tprintf(" = %lu buffers in vector %u\n",
                                (unsigned long)mmsg.msg_hdr.msg_iovlen, i);
-                       dumpiov(tcp, mmsg.msg_hdr.msg_iovlen,
-                               (long)mmsg.msg_hdr.msg_iov);
+                       dumpiov_upto(tcp, mmsg.msg_hdr.msg_iovlen,
+                               (long)mmsg.msg_hdr.msg_iov, mmsg.msg_len);
                }
        }
 }
-#endif /* HAVE_SENDMSG */
 
 /*
  * low bits of the socket type define real socket type,
  * other bits are socket type flags.
  */
 static void
-tprint_sock_type(int flags)
+tprint_sock_type(unsigned int flags)
 {
        const char *str = xlookup(socktypes, flags & SOCK_TYPE_MASK);
 
@@ -732,68 +786,60 @@ tprint_sock_type(int flags)
 
 SYS_FUNC(socket)
 {
-       if (entering(tcp)) {
-               printxval(domains, tcp->u_arg[0], "PF_???");
-               tprints(", ");
-               tprint_sock_type(tcp->u_arg[1]);
-               tprints(", ");
-               switch (tcp->u_arg[0]) {
-               case PF_INET:
-#ifdef PF_INET6
-               case PF_INET6:
+       printxval(addrfams, tcp->u_arg[0], "AF_???");
+       tprints(", ");
+       tprint_sock_type(tcp->u_arg[1]);
+       tprints(", ");
+       switch (tcp->u_arg[0]) {
+       case AF_INET:
+#ifdef AF_INET6
+       case AF_INET6:
 #endif
-                       printxval(inet_protocols, tcp->u_arg[2], "IPPROTO_???");
-                       break;
-#ifdef PF_IPX
-               case PF_IPX:
-                       /* BTW: I don't believe this.. */
-                       tprints("[");
-                       printxval(domains, tcp->u_arg[2], "PF_???");
-                       tprints("]");
-                       break;
-#endif /* PF_IPX */
-#ifdef PF_NETLINK
-               case PF_NETLINK:
-                       printxval(netlink_protocols, tcp->u_arg[2], "NETLINK_???");
-                       break;
+               printxval(inet_protocols, tcp->u_arg[2], "IPPROTO_???");
+               break;
+#ifdef AF_IPX
+       case AF_IPX:
+               /* BTW: I don't believe this.. */
+               tprints("[");
+               printxval(addrfams, tcp->u_arg[2], "AF_???");
+               tprints("]");
+               break;
+#endif /* AF_IPX */
+#ifdef AF_NETLINK
+       case AF_NETLINK:
+               printxval(netlink_protocols, tcp->u_arg[2], "NETLINK_???");
+               break;
 #endif
-#if defined(PF_BLUETOOTH) && defined(HAVE_BLUETOOTH_BLUETOOTH_H)
-               case PF_BLUETOOTH:
-                       printxval(bt_protocols, tcp->u_arg[2], "BTPROTO_???");
-                       break;
+#if defined(AF_BLUETOOTH) && defined(HAVE_BLUETOOTH_BLUETOOTH_H)
+       case AF_BLUETOOTH:
+               printxval(bt_protocols, tcp->u_arg[2], "BTPROTO_???");
+               break;
 #endif
-               default:
-                       tprintf("%lu", tcp->u_arg[2]);
-                       break;
-               }
+       default:
+               tprintf("%lu", tcp->u_arg[2]);
+               break;
        }
-       return 0;
+
+       return RVAL_DECODED | RVAL_FD;
 }
 
 SYS_FUNC(bind)
 {
-       if (entering(tcp)) {
-               printfd(tcp, tcp->u_arg[0]);
-               tprints(", ");
-               printsock(tcp, tcp->u_arg[1], tcp->u_arg[2]);
-               tprintf(", %lu", tcp->u_arg[2]);
-       }
-       return 0;
-}
+       printfd(tcp, tcp->u_arg[0]);
+       tprints(", ");
+       printsock(tcp, tcp->u_arg[1], tcp->u_arg[2]);
+       tprintf(", %lu", tcp->u_arg[2]);
 
-SYS_FUNC(connect)
-{
-       return sys_bind(tcp);
+       return RVAL_DECODED;
 }
 
 SYS_FUNC(listen)
 {
-       if (entering(tcp)) {
-               printfd(tcp, tcp->u_arg[0]);
-               tprints(", ");
-               tprintf("%lu", tcp->u_arg[1]);
-       }
-       return 0;
+       printfd(tcp, tcp->u_arg[0]);
+       tprints(", ");
+       tprintf("%lu", tcp->u_arg[1]);
+
+       return RVAL_DECODED;
 }
 
 static int
@@ -804,19 +850,18 @@ do_sockname(struct tcb *tcp, int flags_arg)
                tprints(", ");
                return 0;
        }
-       if (!tcp->u_arg[2])
-               tprintf("%#lx, NULL", tcp->u_arg[1]);
-       else {
-               int len;
-               if (tcp->u_arg[1] == 0 || syserror(tcp)
-                   || umove(tcp, tcp->u_arg[2], &len) < 0) {
-                       tprintf("%#lx", tcp->u_arg[1]);
-               } else {
-                       printsock(tcp, tcp->u_arg[1], len);
-               }
+
+       int len;
+       if (!tcp->u_arg[2] || !verbose(tcp) || syserror(tcp) ||
+           umove(tcp, tcp->u_arg[2], &len) < 0) {
+               printaddr(tcp->u_arg[1]);
                tprints(", ");
-               printnum_int(tcp, tcp->u_arg[2], "%u");
+               printaddr(tcp->u_arg[2]);
+       } else {
+               printsock(tcp, tcp->u_arg[1], len);
+               tprintf(", [%d]", len);
        }
+
        if (flags_arg >= 0) {
                tprints(", ");
                printflags(sock_type_flags, tcp->u_arg[flags_arg],
@@ -839,48 +884,43 @@ SYS_FUNC(accept4)
 
 SYS_FUNC(send)
 {
-       if (entering(tcp)) {
-               printfd(tcp, tcp->u_arg[0]);
-               tprints(", ");
-               printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
-               tprintf(", %lu, ", tcp->u_arg[2]);
-               /* flags */
-               printflags(msg_flags, tcp->u_arg[3], "MSG_???");
-       }
-       return 0;
+       printfd(tcp, tcp->u_arg[0]);
+       tprints(", ");
+       printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
+       tprintf(", %lu, ", tcp->u_arg[2]);
+       /* flags */
+       printflags(msg_flags, tcp->u_arg[3], "MSG_???");
+
+       return RVAL_DECODED;
 }
 
 SYS_FUNC(sendto)
 {
-       if (entering(tcp)) {
-               printfd(tcp, tcp->u_arg[0]);
-               tprints(", ");
-               printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
-               tprintf(", %lu, ", tcp->u_arg[2]);
-               /* flags */
-               printflags(msg_flags, tcp->u_arg[3], "MSG_???");
-               /* to address */
-               tprints(", ");
-               printsock(tcp, tcp->u_arg[4], tcp->u_arg[5]);
-               /* to length */
-               tprintf(", %lu", tcp->u_arg[5]);
-       }
-       return 0;
-}
+       printfd(tcp, tcp->u_arg[0]);
+       tprints(", ");
+       printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
+       tprintf(", %lu, ", tcp->u_arg[2]);
+       /* flags */
+       printflags(msg_flags, tcp->u_arg[3], "MSG_???");
+       /* to address */
+       tprints(", ");
+       printsock(tcp, tcp->u_arg[4], tcp->u_arg[5]);
+       /* to length */
+       tprintf(", %lu", tcp->u_arg[5]);
 
-#ifdef HAVE_SENDMSG
+       return RVAL_DECODED;
+}
 
 SYS_FUNC(sendmsg)
 {
-       if (entering(tcp)) {
-               printfd(tcp, tcp->u_arg[0]);
-               tprints(", ");
-               printmsghdr(tcp, tcp->u_arg[1], (unsigned long) -1L);
-               /* flags */
-               tprints(", ");
-               printflags(msg_flags, tcp->u_arg[2], "MSG_???");
-       }
-       return 0;
+       printfd(tcp, tcp->u_arg[0]);
+       tprints(", ");
+       printmsghdr(tcp, tcp->u_arg[1], (unsigned long) -1L);
+       /* flags */
+       tprints(", ");
+       printflags(msg_flags, tcp->u_arg[2], "MSG_???");
+
+       return RVAL_DECODED;
 }
 
 SYS_FUNC(sendmmsg)
@@ -901,8 +941,6 @@ SYS_FUNC(sendmmsg)
        return 0;
 }
 
-#endif /* HAVE_SENDMSG */
-
 SYS_FUNC(recv)
 {
        if (entering(tcp)) {
@@ -910,7 +948,7 @@ SYS_FUNC(recv)
                tprints(", ");
        } else {
                if (syserror(tcp))
-                       tprintf("%#lx", tcp->u_arg[1]);
+                       printaddr(tcp->u_arg[1]);
                else
                        printstr(tcp, tcp->u_arg[1], tcp->u_rval);
 
@@ -928,44 +966,33 @@ SYS_FUNC(recvfrom)
                printfd(tcp, tcp->u_arg[0]);
                tprints(", ");
        } else {
+               /* buf */
                if (syserror(tcp)) {
-                       tprintf("%#lx, %lu, %lu, %#lx, %#lx",
-                               tcp->u_arg[1], tcp->u_arg[2], tcp->u_arg[3],
-                               tcp->u_arg[4], tcp->u_arg[5]);
-                       return 0;
+                       printaddr(tcp->u_arg[1]);
+               } else {
+                       printstr(tcp, tcp->u_arg[1], tcp->u_rval);
                }
-               /* buf */
-               printstr(tcp, tcp->u_arg[1], tcp->u_rval);
                /* len */
                tprintf(", %lu, ", tcp->u_arg[2]);
                /* flags */
                printflags(msg_flags, tcp->u_arg[3], "MSG_???");
-               /* from address, len */
-               if (!tcp->u_arg[4] || !tcp->u_arg[5]) {
-                       if (tcp->u_arg[4] == 0)
-                               tprints(", NULL");
-                       else
-                               tprintf(", %#lx", tcp->u_arg[4]);
-                       if (tcp->u_arg[5] == 0)
-                               tprints(", NULL");
-                       else
-                               tprintf(", %#lx", tcp->u_arg[5]);
-                       return 0;
-               }
-               if (umove(tcp, tcp->u_arg[5], &fromlen) < 0) {
-                       tprints(", {...}, [?]");
+               tprints(", ");
+               if (syserror(tcp) || !tcp->u_arg[4] || !tcp->u_arg[5] ||
+                   umove(tcp, tcp->u_arg[5], &fromlen) < 0) {
+                       /* from address, len */
+                       printaddr(tcp->u_arg[4]);
+                       tprints(", ");
+                       printaddr(tcp->u_arg[5]);
                        return 0;
                }
-               tprints(", ");
-               printsock(tcp, tcp->u_arg[4], tcp->u_arg[5]);
+               /* from address */
+               printsock(tcp, tcp->u_arg[4], fromlen);
                /* from length */
                tprintf(", [%u]", fromlen);
        }
        return 0;
 }
 
-#ifdef HAVE_SENDMSG
-
 SYS_FUNC(recvmsg)
 {
        if (entering(tcp)) {
@@ -973,7 +1000,7 @@ SYS_FUNC(recvmsg)
                tprints(", ");
        } else {
                if (syserror(tcp))
-                       tprintf("%#lx", tcp->u_arg[1]);
+                       printaddr(tcp->u_arg[1]);
                else
                        printmsghdr(tcp, tcp->u_arg[1], tcp->u_rval);
                /* flags */
@@ -985,18 +1012,16 @@ SYS_FUNC(recvmsg)
 
 SYS_FUNC(recvmmsg)
 {
-       /* +5 chars are for "left " prefix */
-       static char str[5 + TIMESPEC_TEXT_BUFSIZE];
+       static char str[sizeof("left") + TIMESPEC_TEXT_BUFSIZE];
 
        if (entering(tcp)) {
                printfd(tcp, tcp->u_arg[0]);
                tprints(", ");
                if (verbose(tcp)) {
-                       sprint_timespec(str, tcp, tcp->u_arg[4]);
                        /* Abusing tcp->auxstr as temp storage.
-                        * Will be used and freed on syscall exit.
+                        * Will be used and cleared on syscall exit.
                         */
-                       tcp->auxstr = xstrdup(str);
+                       tcp->auxstr = sprint_timespec(tcp, tcp->u_arg[4]);
                } else {
                        tprintf("%#lx, %ld, ", tcp->u_arg[1], tcp->u_arg[2]);
                        printflags(msg_flags, tcp->u_arg[3], "MSG_???");
@@ -1007,9 +1032,9 @@ SYS_FUNC(recvmmsg)
        } else {
                if (verbose(tcp)) {
                        decode_mmsg(tcp, 0);
+                       tprints(", ");
                        /* timeout on entrance */
-                       tprintf(", %s", tcp->auxstr ? tcp->auxstr : "{...}");
-                       free((void *) tcp->auxstr);
+                       tprints(tcp->auxstr);
                        tcp->auxstr = NULL;
                }
                if (syserror(tcp))
@@ -1021,24 +1046,22 @@ SYS_FUNC(recvmmsg)
                if (!verbose(tcp))
                        return 0;
                /* timeout on exit */
-               sprint_timespec(stpcpy(str, "left "), tcp, tcp->u_arg[4]);
+               snprintf(str, sizeof(str), "left %s",
+                        sprint_timespec(tcp, tcp->u_arg[4]));
                tcp->auxstr = str;
                return RVAL_STR;
        }
 }
 
-#endif /* HAVE_SENDMSG */
-
 #include "xlat/shutdown_modes.h"
 
 SYS_FUNC(shutdown)
 {
-       if (entering(tcp)) {
-               printfd(tcp, tcp->u_arg[0]);
-               tprints(", ");
-               printxval(shutdown_modes, tcp->u_arg[1], "SHUT_???");
-       }
-       return 0;
+       printfd(tcp, tcp->u_arg[0]);
+       tprints(", ");
+       printxval(shutdown_modes, tcp->u_arg[1], "SHUT_???");
+
+       return RVAL_DECODED;
 }
 
 SYS_FUNC(getsockname)
@@ -1046,27 +1069,32 @@ SYS_FUNC(getsockname)
        return do_sockname(tcp, -1);
 }
 
+static void
+printpair_fd(struct tcb *tcp, const int i0, const int i1)
+{
+       tprints("[");
+       printfd(tcp, i0);
+       tprints(", ");
+       printfd(tcp, i1);
+       tprints("]");
+}
+
+static void
+decode_pair_fd(struct tcb *tcp, const long addr)
+{
+       int pair[2];
+
+       if (umove_or_printaddr(tcp, addr, &pair))
+               return;
+
+       printpair_fd(tcp, pair[0], pair[1]);
+}
+
 static int
 do_pipe(struct tcb *tcp, int flags_arg)
 {
        if (exiting(tcp)) {
-               if (syserror(tcp)) {
-                       tprintf("%#lx", tcp->u_arg[0]);
-               } else {
-#ifdef HAVE_GETRVAL2
-                       if (flags_arg < 0) {
-                               tprintf("[%lu, %lu]", tcp->u_rval, getrval2(tcp));
-                       } else
-#endif
-                       {
-                               int fds[2];
-
-                               if (umove(tcp, tcp->u_arg[0], &fds) < 0)
-                                       tprintf("%#lx", tcp->u_arg[0]);
-                               else
-                                       tprintf("[%u, %u]", fds[0], fds[1]);
-                       }
-               }
+               decode_pair_fd(tcp, tcp->u_arg[0]);
                if (flags_arg >= 0) {
                        tprints(", ");
                        printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
@@ -1077,7 +1105,13 @@ do_pipe(struct tcb *tcp, int flags_arg)
 
 SYS_FUNC(pipe)
 {
+#ifdef HAVE_GETRVAL2
+       if (exiting(tcp) && !syserror(tcp))
+               printpair_fd(tcp, tcp->u_rval, getrval2(tcp));
+       return 0;
+#else
        return do_pipe(tcp, -1);
+#endif
 }
 
 SYS_FUNC(pipe2)
@@ -1087,29 +1121,25 @@ SYS_FUNC(pipe2)
 
 SYS_FUNC(socketpair)
 {
-       int fds[2];
-
        if (entering(tcp)) {
-               printxval(domains, tcp->u_arg[0], "PF_???");
+               printxval(addrfams, tcp->u_arg[0], "AF_???");
                tprints(", ");
                tprint_sock_type(tcp->u_arg[1]);
                tprintf(", %lu", tcp->u_arg[2]);
        } else {
-               if (syserror(tcp)) {
-                       tprintf(", %#lx", tcp->u_arg[3]);
-                       return 0;
-               }
-               if (umoven(tcp, tcp->u_arg[3], sizeof fds, fds) < 0)
-                       tprints(", [...]");
-               else
-                       tprintf(", [%u, %u]", fds[0], fds[1]);
+               tprints(", ");
+               decode_pair_fd(tcp, tcp->u_arg[3]);
        }
        return 0;
 }
 
 #include "xlat/sockoptions.h"
 #include "xlat/sockipoptions.h"
+#include "xlat/getsockipoptions.h"
+#include "xlat/setsockipoptions.h"
 #include "xlat/sockipv6options.h"
+#include "xlat/getsockipv6options.h"
+#include "xlat/setsockipv6options.h"
 #include "xlat/sockipxoptions.h"
 #include "xlat/sockrawoptions.h"
 #include "xlat/sockpacketoptions.h"
@@ -1117,7 +1147,8 @@ SYS_FUNC(socketpair)
 #include "xlat/socktcpoptions.h"
 
 static void
-print_sockopt_fd_level_name(struct tcb *tcp, int fd, int level, int name)
+print_sockopt_fd_level_name(struct tcb *tcp, int fd, unsigned int level,
+                           unsigned int name, bool is_getsockopt)
 {
        printfd(tcp, fd);
        tprints(", ");
@@ -1129,10 +1160,12 @@ print_sockopt_fd_level_name(struct tcb *tcp, int fd, int level, int name)
                printxval(sockoptions, name, "SO_???");
                break;
        case SOL_IP:
-               printxval(sockipoptions, name, "IP_???");
+               printxvals(name, "IP_???", sockipoptions,
+                       is_getsockopt ? getsockipoptions : setsockipoptions, NULL);
                break;
        case SOL_IPV6:
-               printxval(sockipv6options, name, "IPV6_???");
+               printxvals(name, "IPV6_???", sockipv6options,
+                       is_getsockopt ? getsockipv6options : setsockipv6options, NULL);
                break;
        case SOL_IPX:
                printxval(sockipxoptions, name, "IPX_???");
@@ -1167,7 +1200,7 @@ print_linger(struct tcb *tcp, long addr, int len)
 
        if (len != sizeof(linger) ||
            umove(tcp, addr, &linger) < 0) {
-               tprintf("%#lx", addr);
+               printaddr(addr);
                return;
        }
 
@@ -1185,7 +1218,7 @@ print_ucred(struct tcb *tcp, long addr, int len)
 
        if (len != sizeof(uc) ||
            umove(tcp, addr, &uc) < 0) {
-               tprintf("%#lx", addr);
+               printaddr(addr);
        } else {
                tprintf("{pid=%u, uid=%u, gid=%u}",
                        (unsigned) uc.pid,
@@ -1203,7 +1236,7 @@ print_tpacket_stats(struct tcb *tcp, long addr, int len)
 
        if (len != sizeof(stats) ||
            umove(tcp, addr, &stats) < 0) {
-               tprintf("%#lx", addr);
+               printaddr(addr);
        } else {
                tprintf("{packets=%u, drops=%u}",
                        stats.tp_packets,
@@ -1216,16 +1249,20 @@ print_tpacket_stats(struct tcb *tcp, long addr, int len)
 # include "xlat/icmpfilterflags.h"
 
 static void
-print_icmp_filter(struct tcb *tcp, long addr, int len)
+print_icmp_filter(struct tcb *tcp, const long addr, int len)
 {
-       struct icmp_filter      filter;
+       struct icmp_filter filter = {};
 
-       if (len != sizeof(filter) ||
-           umove(tcp, addr, &filter) < 0) {
-               tprintf("%#lx", addr);
+       if (len > (int) sizeof(filter))
+               len = sizeof(filter);
+       else if (len <= 0) {
+               printaddr(addr);
                return;
        }
 
+       if (umoven_or_printaddr(tcp, addr, len, &filter))
+               return;
+
        tprints("~(");
        printflags(icmpfilterflags, ~filter.data, "ICMP_???");
        tprints(")");
@@ -1233,7 +1270,8 @@ print_icmp_filter(struct tcb *tcp, long addr, int len)
 #endif /* ICMP_FILTER */
 
 static void
-print_getsockopt(struct tcb *tcp, int level, int name, long addr, int len)
+print_getsockopt(struct tcb *tcp, unsigned int level, unsigned int name,
+                long addr, int len)
 {
        if (addr && verbose(tcp))
        switch (level) {
@@ -1282,7 +1320,7 @@ print_getsockopt(struct tcb *tcp, int level, int name, long addr, int len)
                        printstr(tcp, addr, len);
                }
        } else {
-               tprintf("%#lx", addr);
+               printaddr(addr);
        }
 done:
        tprintf(", [%d]", len);
@@ -1292,7 +1330,7 @@ SYS_FUNC(getsockopt)
 {
        if (entering(tcp)) {
                print_sockopt_fd_level_name(tcp, tcp->u_arg[0],
-                                           tcp->u_arg[1], tcp->u_arg[2]);
+                                           tcp->u_arg[1], tcp->u_arg[2], true);
        } else {
                int len;
 
@@ -1307,52 +1345,77 @@ SYS_FUNC(getsockopt)
        return 0;
 }
 
-#ifdef MCAST_JOIN_GROUP
+#ifdef IP_ADD_MEMBERSHIP
 static void
-print_group_req(struct tcb *tcp, long addr, int len)
+print_mreq(struct tcb *tcp, long addr, unsigned int len)
 {
-       struct group_req greq;
+       struct ip_mreq mreq;
 
-       if (len != sizeof(greq) ||
-           umove(tcp, addr, &greq) < 0) {
-               tprintf("%#lx", addr);
+       if (len < sizeof(mreq)) {
+               printstr(tcp, addr, len);
                return;
        }
+       if (umove_or_printaddr(tcp, addr, &mreq))
+               return;
 
-       union {
-               struct sockaddr *sa;
-               struct sockaddr_in *sin;
-#ifdef HAVE_INET_NTOP
-               struct sockaddr_in6 *sin6;
-#endif
-       } a = { .sa = (struct sockaddr *) &greq.gr_group };
-#ifdef HAVE_INET_NTOP
-       char str[INET6_ADDRSTRLEN];
-#endif
+       tprints("{imr_multiaddr=inet_addr(");
+       print_quoted_string(inet_ntoa(mreq.imr_multiaddr),
+                           16, QUOTE_0_TERMINATED);
+       tprints("), imr_interface=inet_addr(");
+       print_quoted_string(inet_ntoa(mreq.imr_interface),
+                           16, QUOTE_0_TERMINATED);
+       tprints(")}");
+}
+#endif /* IP_ADD_MEMBERSHIP */
+
+#ifdef IPV6_ADD_MEMBERSHIP
+static void
+print_mreq6(struct tcb *tcp, long addr, unsigned int len)
+{
+       struct ipv6_mreq mreq;
 
-       tprintf("{gr_interface=%u, gr_group={sa_family=", greq.gr_interface);
-       printxval(addrfams, a.sa->sa_family, "AF_???");
+       if (len < sizeof(mreq))
+               goto fail;
 
-       switch (a.sa->sa_family) {
-       case AF_INET:
-               tprintf(", sin_port=htons(%u), sin_addr=inet_addr(\"%s\")}}",
-                       ntohs(a.sin->sin_port),
-                       inet_ntoa(a.sin->sin_addr));
+       if (umove_or_printaddr(tcp, addr, &mreq))
                return;
+
 #ifdef HAVE_INET_NTOP
-       case AF_INET6:
-               if (!inet_ntop(AF_INET6, &a.sin6->sin6_addr, str, sizeof(str)))
-                       break;
-               tprintf(", sin6_port=htons(%u)"
-                       ", inet_pton(AF_INET6, \"%s\", &sin6_addr)}}",
-                       ntohs(a.sin6->sin6_port), str);
-               return;
+       const struct in6_addr *in6 = &mreq.ipv6mr_multiaddr;
+       char address[INET6_ADDRSTRLEN];
+
+       if (!inet_ntop(AF_INET6, in6, address, sizeof(address)))
+               goto fail;
+
+       tprints("{ipv6mr_multiaddr=inet_pton(");
+       print_quoted_string(address, sizeof(address), QUOTE_0_TERMINATED);
+       tprints("), ipv6mr_interface=");
+       print_ifindex(mreq.ipv6mr_interface);
+       tprints("}");
+       return;
 #endif /* HAVE_INET_NTOP */
+
+fail:
+       printstr(tcp, addr, len);
+}
+#endif /* IPV6_ADD_MEMBERSHIP */
+
+#ifdef MCAST_JOIN_GROUP
+static void
+print_group_req(struct tcb *tcp, long addr, int len)
+{
+       struct group_req greq;
+
+       if (len != sizeof(greq) ||
+           umove(tcp, addr, &greq) < 0) {
+               printaddr(addr);
+               return;
        }
 
-       tprints(", sa_data=");
-       print_quoted_string(a.sa->sa_data, sizeof(a.sa->sa_data), 0);
-       tprintf("}}");
+       tprintf("{gr_interface=%u, gr_group=", greq.gr_interface);
+       print_sockaddr(tcp, (const void *) &greq.gr_group,
+                      sizeof(greq.gr_group));
+       tprintf("}");
 
 }
 #endif /* MCAST_JOIN_GROUP */
@@ -1365,7 +1428,7 @@ print_tpacket_req(struct tcb *tcp, long addr, int len)
 
        if (len != sizeof(req) ||
            umove(tcp, addr, &req) < 0) {
-               tprintf("%#lx", addr);
+               printaddr(addr);
        } else {
                tprintf("{block_size=%u, block_nr=%u, "
                        "frame_size=%u, frame_nr=%u}",
@@ -1387,7 +1450,7 @@ print_packet_mreq(struct tcb *tcp, long addr, int len)
 
        if (len != sizeof(mreq) ||
            umove(tcp, addr, &mreq) < 0) {
-               tprintf("%#lx", addr);
+               printaddr(addr);
        } else {
                unsigned int i;
 
@@ -1404,7 +1467,8 @@ print_packet_mreq(struct tcb *tcp, long addr, int len)
 #endif /* PACKET_ADD_MEMBERSHIP */
 
 static void
-print_setsockopt(struct tcb *tcp, int level, int name, long addr, int len)
+print_setsockopt(struct tcb *tcp, unsigned int level, unsigned int name,
+                long addr, int len)
 {
        if (addr && verbose(tcp))
        switch (level) {
@@ -1420,6 +1484,12 @@ print_setsockopt(struct tcb *tcp, int level, int name, long addr, int len)
 
        case SOL_IP:
                switch (name) {
+#ifdef IP_ADD_MEMBERSHIP
+               case IP_ADD_MEMBERSHIP:
+               case IP_DROP_MEMBERSHIP:
+                       print_mreq(tcp, addr, len);
+                       goto done;
+#endif /* IP_ADD_MEMBERSHIP */
 #ifdef MCAST_JOIN_GROUP
                case MCAST_JOIN_GROUP:
                case MCAST_LEAVE_GROUP:
@@ -1429,6 +1499,23 @@ print_setsockopt(struct tcb *tcp, int level, int name, long addr, int len)
                }
                break;
 
+       case SOL_IPV6:
+               switch (name) {
+#ifdef IPV6_ADD_MEMBERSHIP
+               case IPV6_ADD_MEMBERSHIP:
+               case IPV6_DROP_MEMBERSHIP:
+# ifdef IPV6_JOIN_ANYCAST
+               case IPV6_JOIN_ANYCAST:
+# endif
+# ifdef IPV6_LEAVE_ANYCAST
+               case IPV6_LEAVE_ANYCAST:
+# endif
+                       print_mreq6(tcp, addr, len);
+                       goto done;
+#endif /* IPV6_ADD_MEMBERSHIP */
+               }
+               break;
+
        case SOL_PACKET:
                switch (name) {
 #ifdef PACKET_RX_RING
@@ -1468,7 +1555,7 @@ print_setsockopt(struct tcb *tcp, int level, int name, long addr, int len)
                        printstr(tcp, addr, len);
                }
        } else {
-               tprintf("%#lx", addr);
+               printaddr(addr);
        }
 done:
        tprintf(", %d", len);
@@ -1476,11 +1563,10 @@ done:
 
 SYS_FUNC(setsockopt)
 {
-       if (entering(tcp)) {
-               print_sockopt_fd_level_name(tcp, tcp->u_arg[0],
-                                           tcp->u_arg[1], tcp->u_arg[2]);
-               print_setsockopt(tcp, tcp->u_arg[1], tcp->u_arg[2],
-                                tcp->u_arg[3], tcp->u_arg[4]);
-       }
-       return 0;
+       print_sockopt_fd_level_name(tcp, tcp->u_arg[0],
+                                   tcp->u_arg[1], tcp->u_arg[2], false);
+       print_setsockopt(tcp, tcp->u_arg[1], tcp->u_arg[2],
+                        tcp->u_arg[3], tcp->u_arg[4]);
+
+       return RVAL_DECODED;
 }