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 static void
  70 fill_common_sockinfo(struct socket *so, struct socket_info *si)
  71 {
  72         si->soi_so = (u_int64_t)VM_KERNEL_ADDRPERM(so);
  73         si->soi_type = so->so_type;
  74         si->soi_options = (short)(so->so_options & 0xffff);
  75         si->soi_linger = so->so_linger;
  76         si->soi_state = so->so_state;
  77         si->soi_pcb = (u_int64_t)VM_KERNEL_ADDRPERM(so->so_pcb);
  78         if (so->so_proto) {
  79                 si->soi_protocol = SOCK_PROTO(so);
  80                 if (so->so_proto->pr_domain)
  81                         si->soi_family = SOCK_DOM(so);
  82                 else
  83                         si->soi_family = 0;
  84         } else {
  85                 si->soi_protocol = si->soi_family = 0;
  86         }
  87         si->soi_qlen = so->so_qlen;
  88         si->soi_incqlen = so->so_incqlen;
  89         si->soi_qlimit = so->so_qlimit;
  90         si->soi_timeo = so->so_timeo;
  91         si->soi_error = so->so_error;
  92         si->soi_oobmark = so->so_oobmark;
  93         fill_sockbuf_info(&so->so_snd, &si->soi_snd);
  94         fill_sockbuf_info(&so->so_rcv, &si->soi_rcv);
  95 }
  96
  97 errno_t
  98 fill_socketinfo(struct socket *so, struct socket_info *si)
  99 {
 100         errno_t error = 0;
 101         int domain;
 102         short type;
 103         short protocol;
 104
 105         socket_lock(so, 0);
 106
 107         si->soi_kind = SOCKINFO_GENERIC;
 108
 109         fill_common_sockinfo(so, si);
 110
 111         if (so->so_pcb == NULL || so->so_proto == 0 ||
 112             so->so_proto->pr_domain == NULL)
 113                 goto out;
 114
 115         /*
 116          * The kind of socket is determined by the triplet
 117          * {domain, type, protocol}
 118          */
 119         domain = SOCK_DOM(so);
 120         type = SOCK_TYPE(so);
 121         protocol = SOCK_PROTO(so);
 122         switch (domain) {
 123         case PF_INET:
 124         case PF_INET6: {
 125                 struct in_sockinfo *insi = &si->soi_proto.pri_in;
 126                 struct inpcb *inp = (struct inpcb *)so->so_pcb;
 127
 128                 si->soi_kind = SOCKINFO_IN;
 129
 130                 insi->insi_fport = inp->inp_fport;
 131                 insi->insi_lport = inp->inp_lport;
 132                 insi->insi_gencnt = inp->inp_gencnt;
 133                 insi->insi_flags = inp->inp_flags;
 134                 insi->insi_vflag = inp->inp_vflag;
 135                 insi->insi_ip_ttl = inp->inp_ip_ttl;
 136                 insi->insi_faddr.ina_6 = inp->inp_dependfaddr.inp6_foreign;
 137                 insi->insi_laddr.ina_6 = inp->inp_dependladdr.inp6_local;
 138                 insi->insi_v4.in4_tos = inp->inp_depend4.inp4_ip_tos;
 139                 insi->insi_v6.in6_hlim = 0;
 140                 insi->insi_v6.in6_cksum = inp->inp_depend6.inp6_cksum;
 141                 insi->insi_v6.in6_ifindex = 0;
 142                 insi->insi_v6.in6_hops = inp->inp_depend6.inp6_hops;
 143
 144                 if (type == SOCK_STREAM && (protocol == 0 ||
 145                     protocol == IPPROTO_TCP) && inp->inp_ppcb != NULL) {
 146                         struct tcp_sockinfo *tcpsi = &si->soi_proto.pri_tcp;
 147                         struct tcpcb *tp = (struct tcpcb *)inp->inp_ppcb;
 148
 149                         si->soi_kind = SOCKINFO_TCP;
 150
 151                         tcpsi->tcpsi_state = tp->t_state;
 152                         tcpsi->tcpsi_timer[TSI_T_REXMT] =
 153                             tp->t_timer[TCPT_REXMT];
 154                         tcpsi->tcpsi_timer[TSI_T_PERSIST] =
 155                             tp->t_timer[TCPT_PERSIST];
 156                         tcpsi->tcpsi_timer[TSI_T_KEEP] =
 157                             tp->t_timer[TCPT_KEEP];
 158                         tcpsi->tcpsi_timer[TSI_T_2MSL] =
 159                             tp->t_timer[TCPT_2MSL];
 160                         tcpsi->tcpsi_mss = tp->t_maxseg;
 161                         tcpsi->tcpsi_flags = tp->t_flags;
 162                         tcpsi->tcpsi_tp =
 163                             (u_int64_t)VM_KERNEL_ADDRPERM(tp);
 164                 }
 165                 break;
 166         }
 167         case PF_UNIX: {
 168                 struct unpcb *unp = (struct unpcb *)so->so_pcb;
 169                 struct un_sockinfo *unsi = &si->soi_proto.pri_un;
 170
 171                 si->soi_kind = SOCKINFO_UN;
 172
 173                 unsi->unsi_conn_pcb =
 174                     (uint64_t)VM_KERNEL_ADDRPERM(unp->unp_conn);
 175                 if (unp->unp_conn)
 176                         unsi->unsi_conn_so = (uint64_t)
 177                             VM_KERNEL_ADDRPERM(unp->unp_conn->unp_socket);
 178
 179                 if (unp->unp_addr) {
 180                         size_t  addrlen = unp->unp_addr->sun_len;
 181
 182                         if (addrlen > SOCK_MAXADDRLEN)
 183                                 addrlen = SOCK_MAXADDRLEN;
 184                         bcopy(unp->unp_addr, &unsi->unsi_addr, addrlen);
 185                 }
 186                 if (unp->unp_conn && unp->unp_conn->unp_addr) {
 187                         size_t  addrlen = unp->unp_conn->unp_addr->sun_len;
 188
 189                         if (addrlen > SOCK_MAXADDRLEN)
 190                                 addrlen = SOCK_MAXADDRLEN;
 191                         bcopy(unp->unp_conn->unp_addr, &unsi->unsi_caddr,
 192                             addrlen);
 193                 }
 194                 break;
 195         }
 196         case PF_NDRV: {
 197                 struct ndrv_cb *ndrv_cb = (struct ndrv_cb *)so->so_pcb;
 198                 struct ndrv_info *ndrvsi = &si->soi_proto.pri_ndrv;
 199
 200                 si->soi_kind = SOCKINFO_NDRV;
 201
 202                 /* TDB lock ifnet ???? */
 203                 if (ndrv_cb->nd_if != 0) {
 204                         struct ifnet *ifp = ndrv_cb->nd_if;
 205
 206                         ndrvsi->ndrvsi_if_family = ifp->if_family;
 207                         ndrvsi->ndrvsi_if_unit = ifp->if_unit;
 208                         strlcpy(ndrvsi->ndrvsi_if_name, ifp->if_name, IFNAMSIZ);
 209                 }
 210                 break;
 211         }
 212         case PF_SYSTEM:
 213                 if (SOCK_PROTO(so) == SYSPROTO_EVENT) {
 214                         struct kern_event_pcb *ev_pcb =
 215                             (struct kern_event_pcb *)so->so_pcb;
 216                         struct kern_event_info *kesi =
 217                             &si->soi_proto.pri_kern_event;
 218
 219                         si->soi_kind = SOCKINFO_KERN_EVENT;
 220
 221                         kesi->kesi_vendor_code_filter =
 222                             ev_pcb->evp_vendor_code_filter;
 223                         kesi->kesi_class_filter = ev_pcb->evp_class_filter;
 224                         kesi->kesi_subclass_filter = ev_pcb->evp_subclass_filter;
 225                 } else if (SOCK_PROTO(so) == SYSPROTO_CONTROL) {
 226                         kctl_fill_socketinfo(so, si);
 227                 }
 228                 break;
 229
 230         case PF_ROUTE:
 231         case PF_PPP:
 232         default:
 233                 break;
 234         }
 235 out:
 236         socket_unlock(so, 0);
 237
 238         return (error);
 239 }