bsd/kern/socket_info.c

   1 /*
   2  * Copyright (c) 2005-2012 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) + sb->sb_timeo.tv_usec / tick;
  64         if (sbi->sbi_timeo == 0 && sb->sb_timeo.tv_usec != 0)
  65                 sbi->sbi_timeo = 1;
  66 }
  67
  68 static void
  69 fill_common_sockinfo(struct socket *so, struct socket_info *si)
  70 {
  71         si->soi_so = (u_int64_t)VM_KERNEL_ADDRPERM(so);
  72         si->soi_type = so->so_type;
  73         si->soi_options = (short)(so->so_options & 0xffff);
  74         si->soi_linger = so->so_linger;
  75         si->soi_state = so->so_state;
  76         si->soi_pcb = (u_int64_t)VM_KERNEL_ADDRPERM(so->so_pcb);
  77         if (so->so_proto) {
  78                 si->soi_protocol = so->so_proto->pr_protocol;
  79                 if (so->so_proto->pr_domain)
  80                         si->soi_family = so->so_proto->pr_domain->dom_family;
  81                 else
  82                         si->soi_family = 0;
  83         } else
  84                 si->soi_protocol = si->soi_family = 0;
  85         si->soi_qlen = so->so_qlen;
  86         si->soi_incqlen = so->so_incqlen;
  87         si->soi_qlimit = so->so_qlimit;
  88         si->soi_timeo = so->so_timeo;
  89         si->soi_error = so->so_error;
  90         si->soi_oobmark = so->so_oobmark;
  91         fill_sockbuf_info(&so->so_snd, &si->soi_snd);
  92         fill_sockbuf_info(&so->so_rcv, &si->soi_rcv);
  93
  94 }
  95
  96 errno_t
  97 fill_socketinfo(struct socket *so, struct socket_info *si)
  98 {
  99         errno_t error = 0;
 100         int family;
 101         short type;
 102         short protocol;
 103
 104         socket_lock(so, 0);
 105
 106         si->soi_kind = SOCKINFO_GENERIC;
 107
 108         fill_common_sockinfo(so, si);
 109
 110         if (so->so_pcb == 0 || so->so_proto == 0 || so->so_proto->pr_domain == 0)
 111                 goto out;
 112
 113         /* The kind of socket is determined by the triplet {family, type, protocol} */
 114         family = so->so_proto->pr_domain->dom_family;
 115         type =  so->so_proto->pr_type;
 116         protocol =  so->so_proto->pr_protocol;
 117         switch (family) {
 118                 case AF_INET:
 119                 case AF_INET6: {
 120                         struct in_sockinfo *insi = &si->soi_proto.pri_in;
 121                         struct inpcb *inp = (struct inpcb *)so->so_pcb;
 122
 123                         si->soi_kind = SOCKINFO_IN;
 124
 125                         insi->insi_fport = inp->inp_fport;
 126                         insi->insi_lport = inp->inp_lport;
 127                         insi->insi_gencnt = inp->inp_gencnt;
 128                         insi->insi_flags = inp->inp_flags;
 129                         insi->insi_vflag = inp->inp_vflag;
 130                         insi->insi_ip_ttl = inp->inp_ip_ttl;
 131                         insi->insi_faddr.ina_6 = inp->inp_dependfaddr.inp6_foreign;
 132                         insi->insi_laddr.ina_6 = inp->inp_dependladdr.inp6_local;
 133                         insi->insi_v4.in4_tos = inp->inp_depend4.inp4_ip_tos;
 134                         insi->insi_v6.in6_hlim = inp->inp_depend6.inp6_hlim;
 135                         insi->insi_v6.in6_cksum = inp->inp_depend6.inp6_cksum;
 136                         insi->insi_v6.in6_ifindex = inp->inp_depend6.inp6_ifindex;
 137                         insi->insi_v6.in6_hops = inp->inp_depend6.inp6_hops;
 138
 139                         if (type == SOCK_STREAM && (protocol == 0 || protocol == IPPROTO_TCP) && inp->inp_ppcb != 0) {
 140                                 struct tcp_sockinfo *tcpsi = &si->soi_proto.pri_tcp;
 141                                 struct tcpcb *tp= (struct tcpcb *)inp->inp_ppcb;
 142
 143                                 si->soi_kind = SOCKINFO_TCP;
 144
 145                                 tcpsi->tcpsi_state = tp->t_state;
 146                                 tcpsi->tcpsi_timer[TCPT_REXMT] = tp->t_timer[TCPT_REXMT];
 147                                 tcpsi->tcpsi_timer[TCPT_PERSIST] = tp->t_timer[TCPT_PERSIST];
 148                                 tcpsi->tcpsi_timer[TCPT_KEEP] = tp->t_timer[TCPT_KEEP];
 149                                 tcpsi->tcpsi_timer[TCPT_2MSL] = tp->t_timer[TCPT_2MSL];
 150                                 tcpsi->tcpsi_mss = tp->t_maxseg;
 151                                 tcpsi->tcpsi_flags = tp->t_flags;
 152                                 tcpsi->tcpsi_tp =
 153                                     (u_int64_t)VM_KERNEL_ADDRPERM(tp);
 154                         }
 155                         break;
 156                 }
 157                 case AF_UNIX: {
 158                         struct unpcb *unp = (struct unpcb *)so->so_pcb;
 159                         struct un_sockinfo *unsi = &si->soi_proto.pri_un;
 160
 161                         si->soi_kind = SOCKINFO_UN;
 162
 163                         unsi->unsi_conn_pcb =
 164                             (uint64_t)VM_KERNEL_ADDRPERM(unp->unp_conn);
 165                         if (unp->unp_conn)
 166                                 unsi->unsi_conn_so = (uint64_t)
 167                                     VM_KERNEL_ADDRPERM(unp->unp_conn->unp_socket);
 168
 169                         if (unp->unp_addr) {
 170                                 size_t  addrlen = unp->unp_addr->sun_len;
 171
 172                                 if (addrlen > SOCK_MAXADDRLEN)
 173                                         addrlen = SOCK_MAXADDRLEN;
 174                                 bcopy(unp->unp_addr, &unsi->unsi_addr, addrlen);
 175                         }
 176                         if (unp->unp_conn && unp->unp_conn->unp_addr) {
 177                                 size_t  addrlen = unp->unp_conn->unp_addr->sun_len;
 178
 179                                 if (addrlen > SOCK_MAXADDRLEN)
 180                                         addrlen = SOCK_MAXADDRLEN;
 181                                 bcopy(unp->unp_conn->unp_addr, &unsi->unsi_caddr, addrlen);
 182                         }
 183                         break;
 184                 }
 185                 case AF_NDRV: {
 186                         struct ndrv_cb *ndrv_cb = (struct ndrv_cb *)so->so_pcb;
 187                         struct ndrv_info *ndrvsi = &si->soi_proto.pri_ndrv;
 188
 189                         si->soi_kind = SOCKINFO_NDRV;
 190
 191                         /* TDB lock ifnet ???? */
 192                         if (ndrv_cb->nd_if != 0) {
 193                                 struct ifnet *ifp = ndrv_cb->nd_if;
 194
 195                                 ndrvsi->ndrvsi_if_family = ifp->if_family;
 196                                 ndrvsi->ndrvsi_if_unit = ifp->if_unit;
 197                                 strlcpy(ndrvsi->ndrvsi_if_name, ifp->if_name, IFNAMSIZ);
 198                         }
 199
 200                         break;
 201                 }
 202                 case AF_SYSTEM:
 203                         if (so->so_proto->pr_protocol == SYSPROTO_EVENT) {
 204                                 struct kern_event_pcb *ev_pcb = (struct kern_event_pcb *)so->so_pcb;
 205                                 struct kern_event_info *kesi = &si->soi_proto.pri_kern_event;
 206
 207                                 si->soi_kind = SOCKINFO_KERN_EVENT;
 208
 209                                 kesi->kesi_vendor_code_filter = ev_pcb->vendor_code_filter;
 210                                 kesi->kesi_class_filter = ev_pcb->class_filter;
 211                                 kesi->kesi_subclass_filter = ev_pcb->subclass_filter;
 212
 213                         } else if (so->so_proto->pr_protocol == SYSPROTO_CONTROL) {
 214                                 struct ctl_cb *kcb = (struct ctl_cb *)so->so_pcb;
 215                                 struct kern_ctl_info *kcsi = &si->soi_proto.pri_kern_ctl;
 216                                 struct kctl *kctl = kcb->kctl;
 217
 218
 219                                 si->soi_kind = SOCKINFO_KERN_CTL;
 220
 221                                 if (kctl == 0)
 222                                         break;
 223                                 kcsi->kcsi_id = kctl->id;
 224                                 kcsi->kcsi_reg_unit = kctl->id;
 225                                 kcsi->kcsi_flags = kctl->flags;
 226                                 kcsi->kcsi_recvbufsize = kctl->recvbufsize;
 227                                 kcsi->kcsi_sendbufsize = kctl->sendbufsize;
 228                                 kcsi->kcsi_unit = kcb->unit;
 229                                 strlcpy(kcsi->kcsi_name, kctl->name, MAX_KCTL_NAME);
 230                         }
 231                         break;
 232
 233                 case AF_APPLETALK:
 234                         break;
 235
 236                 case AF_ROUTE:
 237                         break;
 238
 239                 case AF_PPP:
 240                         break;
 241
 242                 default:
 243                         break;
 244         }
 245 out:
 246         socket_unlock(so, 0);
 247
 248         return error;
 249 }
 250