bsd/kern/socket_info.c

   1 /*
   2  * Copyright (c) 2005-2015 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 #include <sys/types.h>
  30 #include <sys/kernel_types.h>
  31 #include <sys/errno.h>
  32 #include <sys/kernel.h>
  33 #include <sys/file_internal.h>
  34 #include <sys/stat.h>
  35 #include <sys/select.h>
  36 #include <sys/pipe.h>
  37 #include <sys/proc_info.h>
  38 #include <sys/domain.h>
  39 #include <sys/protosw.h>
  40 #include <sys/domain.h>
  41 #include <sys/socketvar.h>
  42 #include <sys/unpcb.h>
  43 #include <sys/sys_domain.h>
  44 #include <sys/kern_event.h>
  45 #include <mach/vm_param.h>
  46 #include <net/ndrv_var.h>
  47 #include <netinet/in_pcb.h>
  48 #include <netinet/tcp_var.h>
  49 #include <string.h>
  50
  51 static void fill_sockbuf_info(struct sockbuf *sb, struct sockbuf_info *sbi);
  52 static void fill_common_sockinfo(struct socket *so, struct socket_info *si);
  53
  54 static void
  55 fill_sockbuf_info(struct sockbuf *sb, struct sockbuf_info *sbi)
  56 {
  57         sbi->sbi_cc = sb->sb_cc;
  58         sbi->sbi_hiwat = sb->sb_hiwat;
  59         sbi->sbi_mbcnt = sb->sb_mbcnt;
  60         sbi->sbi_mbmax = sb->sb_mbmax;
  61         sbi->sbi_lowat = sb->sb_lowat;
  62         sbi->sbi_flags = sb->sb_flags;
  63         sbi->sbi_timeo = (u_int32_t)(sb->sb_timeo.tv_sec * hz) +
  64             sb->sb_timeo.tv_usec / tick;
  65         if (sbi->sbi_timeo == 0 && sb->sb_timeo.tv_usec != 0) {
  66                 sbi->sbi_timeo = 1;
  67         }
  68 }
  69
  70 static void
  71 fill_common_sockinfo(struct socket *so, struct socket_info *si)
  72 {
  73         si->soi_so = (u_int64_t)VM_KERNEL_ADDRPERM(so);
  74         si->soi_type = so->so_type;
  75         si->soi_options = (short)(so->so_options & 0xffff);
  76         si->soi_linger = so->so_linger;
  77         si->soi_state = so->so_state;
  78         si->soi_pcb = (u_int64_t)VM_KERNEL_ADDRPERM(so->so_pcb);
  79         if (so->so_proto) {
  80                 si->soi_protocol = SOCK_PROTO(so);
  81                 if (so->so_proto->pr_domain) {
  82                         si->soi_family = SOCK_DOM(so);
  83                 } else {
  84                         si->soi_family = 0;
  85                 }
  86         } else {
  87                 si->soi_protocol = si->soi_family = 0;
  88         }
  89         si->soi_qlen = so->so_qlen;
  90         si->soi_incqlen = so->so_incqlen;
  91         si->soi_qlimit = so->so_qlimit;
  92         si->soi_timeo = so->so_timeo;
  93         si->soi_error = so->so_error;
  94         si->soi_oobmark = so->so_oobmark;
  95         fill_sockbuf_info(&so->so_snd, &si->soi_snd);
  96         fill_sockbuf_info(&so->so_rcv, &si->soi_rcv);
  97 }
  98
  99 errno_t
 100 fill_socketinfo(struct socket *so, struct socket_info *si)
 101 {
 102         errno_t error = 0;
 103         int domain;
 104         short type;
 105         short protocol;
 106
 107         socket_lock(so, 0);
 108
 109         si->soi_kind = SOCKINFO_GENERIC;
 110
 111         fill_common_sockinfo(so, si);
 112
 113         if (so->so_pcb == NULL || so->so_proto == 0 ||
 114             so->so_proto->pr_domain == NULL) {
 115                 goto out;
 116         }
 117
 118         /*
 119          * The kind of socket is determined by the triplet
 120          * {domain, type, protocol}
 121          */
 122         domain = SOCK_DOM(so);
 123         type = SOCK_TYPE(so);
 124         protocol = SOCK_PROTO(so);
 125         switch (domain) {
 126         case PF_INET:
 127         case PF_INET6: {
 128                 struct in_sockinfo *insi = &si->soi_proto.pri_in;
 129                 struct inpcb *inp = (struct inpcb *)so->so_pcb;
 130
 131                 si->soi_kind = SOCKINFO_IN;
 132
 133                 insi->insi_fport = inp->inp_fport;
 134                 insi->insi_lport = inp->inp_lport;
 135                 insi->insi_gencnt = inp->inp_gencnt;
 136                 insi->insi_flags = inp->inp_flags;
 137                 insi->insi_vflag = inp->inp_vflag;
 138                 insi->insi_ip_ttl = inp->inp_ip_ttl;
 139                 insi->insi_faddr.ina_6 = inp->inp_dependfaddr.inp6_foreign;
 140                 insi->insi_laddr.ina_6 = inp->inp_dependladdr.inp6_local;
 141                 insi->insi_v4.in4_tos = inp->inp_depend4.inp4_ip_tos;
 142                 insi->insi_v6.in6_hlim = 0;
 143                 insi->insi_v6.in6_cksum = inp->inp_depend6.inp6_cksum;
 144                 insi->insi_v6.in6_ifindex = 0;
 145                 insi->insi_v6.in6_hops = inp->inp_depend6.inp6_hops;
 146
 147                 if (type == SOCK_STREAM && (protocol == 0 ||
 148                     protocol == IPPROTO_TCP) && inp->inp_ppcb != NULL) {
 149                         struct tcp_sockinfo *tcpsi = &si->soi_proto.pri_tcp;
 150                         struct tcpcb *tp = (struct tcpcb *)inp->inp_ppcb;
 151
 152                         si->soi_kind = SOCKINFO_TCP;
 153
 154                         tcpsi->tcpsi_state = tp->t_state;
 155                         tcpsi->tcpsi_timer[TSI_T_REXMT] =
 156                             tp->t_timer[TCPT_REXMT];
 157                         tcpsi->tcpsi_timer[TSI_T_PERSIST] =
 158                             tp->t_timer[TCPT_PERSIST];
 159                         tcpsi->tcpsi_timer[TSI_T_KEEP] =
 160                             tp->t_timer[TCPT_KEEP];
 161                         tcpsi->tcpsi_timer[TSI_T_2MSL] =
 162                             tp->t_timer[TCPT_2MSL];
 163                         tcpsi->tcpsi_mss = tp->t_maxseg;
 164                         tcpsi->tcpsi_flags = tp->t_flags;
 165                         tcpsi->tcpsi_tp =
 166                             (u_int64_t)VM_KERNEL_ADDRPERM(tp);
 167                 }
 168                 break;
 169         }
 170         case PF_UNIX: {
 171                 struct unpcb *unp = (struct unpcb *)so->so_pcb;
 172                 struct un_sockinfo *unsi = &si->soi_proto.pri_un;
 173
 174                 si->soi_kind = SOCKINFO_UN;
 175
 176                 unsi->unsi_conn_pcb =
 177                     (uint64_t)VM_KERNEL_ADDRPERM(unp->unp_conn);
 178                 if (unp->unp_conn) {
 179                         unsi->unsi_conn_so = (uint64_t)
 180                             VM_KERNEL_ADDRPERM(unp->unp_conn->unp_socket);
 181                 }
 182
 183                 if (unp->unp_addr) {
 184                         size_t  addrlen = unp->unp_addr->sun_len;
 185
 186                         if (addrlen > SOCK_MAXADDRLEN) {
 187                                 addrlen = SOCK_MAXADDRLEN;
 188                         }
 189                         bcopy(unp->unp_addr, &unsi->unsi_addr, addrlen);
 190                 }
 191                 if (unp->unp_conn && unp->unp_conn->unp_addr) {
 192                         size_t  addrlen = unp->unp_conn->unp_addr->sun_len;
 193
 194                         if (addrlen > SOCK_MAXADDRLEN) {
 195                                 addrlen = SOCK_MAXADDRLEN;
 196                         }
 197                         bcopy(unp->unp_conn->unp_addr, &unsi->unsi_caddr,
 198                             addrlen);
 199                 }
 200                 break;
 201         }
 202         case PF_NDRV: {
 203                 struct ndrv_cb *ndrv_cb = (struct ndrv_cb *)so->so_pcb;
 204                 struct ndrv_info *ndrvsi = &si->soi_proto.pri_ndrv;
 205
 206                 si->soi_kind = SOCKINFO_NDRV;
 207
 208                 /* TDB lock ifnet ???? */
 209                 if (ndrv_cb->nd_if != 0) {
 210                         struct ifnet *ifp = ndrv_cb->nd_if;
 211
 212                         ndrvsi->ndrvsi_if_family = ifp->if_family;
 213                         ndrvsi->ndrvsi_if_unit = ifp->if_unit;
 214                         strlcpy(ndrvsi->ndrvsi_if_name, ifp->if_name, IFNAMSIZ);
 215                 }
 216                 break;
 217         }
 218         case PF_SYSTEM:
 219                 if (SOCK_PROTO(so) == SYSPROTO_EVENT) {
 220                         struct kern_event_pcb *ev_pcb =
 221                             (struct kern_event_pcb *)so->so_pcb;
 222                         struct kern_event_info *kesi =
 223                             &si->soi_proto.pri_kern_event;
 224
 225                         si->soi_kind = SOCKINFO_KERN_EVENT;
 226
 227                         kesi->kesi_vendor_code_filter =
 228                             ev_pcb->evp_vendor_code_filter;
 229                         kesi->kesi_class_filter = ev_pcb->evp_class_filter;
 230                         kesi->kesi_subclass_filter = ev_pcb->evp_subclass_filter;
 231                 } else if (SOCK_PROTO(so) == SYSPROTO_CONTROL) {
 232                         kctl_fill_socketinfo(so, si);
 233                 }
 234                 break;
 235
 236         case PF_ROUTE:
 237         case PF_PPP:
 238         default:
 239                 break;
 240         }
 241 out:
 242         socket_unlock(so, 0);
 243
 244         return error;
 245 }