bsd/kern/socket_info.c

   1 /*
   2  * Copyright (c) 2005 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22
  23 #include <sys/types.h>
  24 #include <sys/kernel_types.h>
  25 #include <sys/errno.h>
  26 #include <sys/kernel.h>
  27 #include <sys/file_internal.h>
  28 #include <sys/stat.h>
  29 #include <sys/select.h>
  30 #include <sys/pipe.h>
  31 #include <sys/proc_info.h>
  32 #include <sys/domain.h>
  33 #include <sys/protosw.h>
  34 #include <sys/domain.h>
  35 #include <sys/socketvar.h>
  36 #include <sys/unpcb.h>
  37 #include <sys/sys_domain.h>
  38 #include <sys/kern_event.h>
  39 #include <net/ndrv_var.h>
  40 #include <netinet/in_pcb.h>
  41 #include <netinet/tcp_var.h>
  42 #include <string.h>
  43
  44 static void fill_sockbuf_info(struct sockbuf *sb, struct sockbuf_info *sbi);
  45 static void fill_common_sockinfo(struct socket *so, struct socket_info *si);
  46
  47 static void
  48 fill_sockbuf_info(struct sockbuf *sb, struct sockbuf_info *sbi)
  49 {
  50         sbi->sbi_cc = sb->sb_cc;
  51         sbi->sbi_hiwat = sb->sb_hiwat;
  52         sbi->sbi_mbcnt = sb->sb_mbcnt;
  53         sbi->sbi_mbmax = sb->sb_mbmax;
  54         sbi->sbi_lowat = sb->sb_lowat;
  55         sbi->sbi_flags = sb->sb_flags;
  56         sbi->sbi_timeo = (u_long)(sb->sb_timeo.tv_sec * hz) + sb->sb_timeo.tv_usec / tick;
  57         if (sbi->sbi_timeo == 0 && sb->sb_timeo.tv_usec != 0)
  58                 sbi->sbi_timeo = 1;
  59 }
  60
  61 static void
  62 fill_common_sockinfo(struct socket *so, struct socket_info *si)
  63 {
  64         si->soi_so = (u_int64_t)((uintptr_t)so);
  65         si->soi_type = so->so_type;
  66         si->soi_options = so->so_options;
  67         si->soi_linger = so->so_linger;
  68         si->soi_state = so->so_state;
  69         si->soi_pcb = (u_int64_t)((uintptr_t)so->so_pcb);
  70         if (so->so_proto) {
  71                 si->soi_protocol = so->so_proto->pr_protocol;
  72                 if (so->so_proto->pr_domain)
  73                         si->soi_family = so->so_proto->pr_domain->dom_family;
  74                 else
  75                         si->soi_family = 0;
  76         } else
  77                 si->soi_protocol = si->soi_family = 0;
  78         si->soi_qlen = so->so_qlen;
  79         si->soi_incqlen = so->so_incqlen;
  80         si->soi_qlimit = so->so_qlimit;
  81         si->soi_timeo = so->so_timeo;
  82         si->soi_error = so->so_error;
  83         si->soi_oobmark = so->so_oobmark;
  84         fill_sockbuf_info(&so->so_snd, &si->soi_snd);
  85         fill_sockbuf_info(&so->so_rcv, &si->soi_rcv);
  86
  87 }
  88
  89 errno_t
  90 fill_socketinfo(struct socket *so, struct socket_info *si)
  91 {
  92         errno_t error = 0;
  93         int family;
  94         short type;
  95         short protocol;
  96
  97         socket_lock(so, 0);
  98
  99         si->soi_kind = SOCKINFO_GENERIC;
 100
 101         fill_common_sockinfo(so, si);
 102
 103         if (so->so_pcb == 0 || so->so_proto == 0 || so->so_proto->pr_domain == 0)
 104                 goto out;
 105
 106         /* The kind of socket is determined by the triplet {family, type, protocol} */
 107         family = so->so_proto->pr_domain->dom_family;
 108         type =  so->so_proto->pr_type;
 109         protocol =  so->so_proto->pr_protocol;
 110         switch (family) {
 111                 case AF_INET:
 112                 case AF_INET6: {
 113                         struct in_sockinfo *insi = &si->soi_proto.pri_in;
 114                         struct inpcb *inp = (struct inpcb *)so->so_pcb;
 115
 116                         si->soi_kind = SOCKINFO_IN;
 117
 118                         insi->insi_fport = inp->inp_fport;
 119                         insi->insi_lport = inp->inp_lport;
 120                         insi->insi_gencnt = inp->inp_gencnt;
 121                         insi->insi_flags = inp->inp_flags;
 122                         insi->insi_vflag = inp->inp_vflag;
 123                         insi->insi_ip_ttl = inp->inp_ip_ttl;
 124                         insi->insi_faddr.ina_6 = inp->inp_dependfaddr.inp6_foreign;
 125                         insi->insi_laddr.ina_6 = inp->inp_dependladdr.inp6_local;
 126                         insi->insi_v4.in4_tos = inp->inp_depend4.inp4_ip_tos;
 127                         insi->insi_v6.in6_hlim = inp->inp_depend6.inp6_hlim;
 128                         insi->insi_v6.in6_cksum = inp->inp_depend6.inp6_cksum;
 129                         insi->insi_v6.in6_ifindex = inp->inp6_ifindex;
 130                         insi->insi_v6.in6_hops = inp->inp_depend6.inp6_hops;
 131
 132                         if (type == SOCK_STREAM && (protocol == 0 || protocol == IPPROTO_TCP) && inp->inp_ppcb != 0) {
 133                                 struct tcp_sockinfo *tcpsi = &si->soi_proto.pri_tcp;
 134                                 struct tcpcb *tp= (struct tcpcb *)inp->inp_ppcb;
 135
 136                                 si->soi_kind = SOCKINFO_TCP;
 137
 138                                 tcpsi->tcpsi_state = tp->t_state;
 139                                 tcpsi->tcpsi_timer[TCPT_REXMT] = tp->t_timer[TCPT_REXMT];
 140                                 tcpsi->tcpsi_timer[TCPT_PERSIST] = tp->t_timer[TCPT_PERSIST];
 141                                 tcpsi->tcpsi_timer[TCPT_KEEP] = tp->t_timer[TCPT_KEEP];
 142                                 tcpsi->tcpsi_timer[TCPT_2MSL] = tp->t_timer[TCPT_2MSL];
 143                                 tcpsi->tcpsi_mss = tp->t_maxseg;
 144                                 tcpsi->tcpsi_flags = tp->t_flags;
 145                                 tcpsi->tcpsi_tp = (u_int64_t)((uintptr_t)tp);
 146                         }
 147                         break;
 148                 }
 149                 case AF_UNIX: {
 150                         struct unpcb *unp = (struct unpcb *)so->so_pcb;
 151                         struct un_sockinfo *unsi = &si->soi_proto.pri_un;
 152
 153                         si->soi_kind = SOCKINFO_UN;
 154
 155                         unsi->unsi_conn_pcb = (uint64_t)((uintptr_t)unp->unp_conn);
 156                         if (unp->unp_conn)
 157                                 unsi->unsi_conn_so = (uint64_t)((uintptr_t)unp->unp_conn->unp_socket);
 158
 159
 160                         if (unp->unp_addr) {
 161                                 size_t  addrlen = unp->unp_addr->sun_len;
 162
 163                                 if (addrlen > SOCK_MAXADDRLEN)
 164                                         addrlen = SOCK_MAXADDRLEN;
 165                                 bcopy(unp->unp_addr, &unsi->unsi_addr, addrlen);
 166                         }
 167                         if (unp->unp_conn && unp->unp_conn->unp_addr) {
 168                                 size_t  addrlen = unp->unp_conn->unp_addr->sun_len;
 169
 170                                 if (addrlen > SOCK_MAXADDRLEN)
 171                                         addrlen = SOCK_MAXADDRLEN;
 172                                 bcopy(unp->unp_conn->unp_addr, &unsi->unsi_caddr, addrlen);
 173                         }
 174                         break;
 175                 }
 176                 case AF_NDRV: {
 177                         struct ndrv_cb *ndrv_cb = (struct ndrv_cb *)so->so_pcb;
 178                         struct ndrv_info *ndrvsi = &si->soi_proto.pri_ndrv;
 179
 180                         si->soi_kind = SOCKINFO_NDRV;
 181
 182                         /* TDB lock ifnet ???? */
 183                         if (ndrv_cb->nd_if != 0) {
 184                                 struct ifnet *ifp = ndrv_cb->nd_if;
 185
 186                                 ndrvsi->ndrvsi_if_family = ifp->if_family;
 187                                 ndrvsi->ndrvsi_if_unit = ifp->if_unit;
 188                                 strncpy(ndrvsi->ndrvsi_if_name, ifp->if_name, IFNAMSIZ);
 189                         }
 190
 191                         break;
 192                 }
 193                 case AF_SYSTEM:
 194                         if (so->so_proto->pr_protocol == SYSPROTO_EVENT) {
 195                                 struct kern_event_pcb *ev_pcb = (struct kern_event_pcb *)so->so_pcb;
 196                                 struct kern_event_info *kesi = &si->soi_proto.pri_kern_event;
 197
 198                                 si->soi_kind = SOCKINFO_KERN_EVENT;
 199
 200                                 kesi->kesi_vendor_code_filter = ev_pcb->vendor_code_filter;
 201                                 kesi->kesi_class_filter = ev_pcb->class_filter;
 202                                 kesi->kesi_subclass_filter = ev_pcb->subclass_filter;
 203
 204                         } else if (so->so_proto->pr_protocol == SYSPROTO_CONTROL) {
 205                                 struct ctl_cb *kcb = (struct ctl_cb *)so->so_pcb;
 206                                 struct kern_ctl_info *kcsi = &si->soi_proto.pri_kern_ctl;
 207                                 struct kctl *kctl = kcb->kctl;
 208
 209
 210                                 si->soi_kind = SOCKINFO_KERN_CTL;
 211
 212                                 if (kctl == 0)
 213                                         break;
 214                                 kcsi->kcsi_id = kctl->id;
 215                                 kcsi->kcsi_reg_unit = kctl->id;
 216                                 kcsi->kcsi_flags = kctl->flags;
 217                                 kcsi->kcsi_recvbufsize = kctl->recvbufsize;
 218                                 kcsi->kcsi_sendbufsize = kctl->sendbufsize;
 219                                 kcsi->kcsi_unit = kcb->unit;
 220                                 strncpy(kcsi->kcsi_name, kctl->name, MAX_KCTL_NAME);
 221                         }
 222                         break;
 223
 224                 case AF_APPLETALK:
 225                         break;
 226
 227                 case AF_ROUTE:
 228                         break;
 229
 230                 case AF_PPP:
 231                         break;
 232
 233                 default:
 234                         break;
 235         }
 236 out:
 237         socket_unlock(so, 0);
 238
 239         return error;
 240 }
 241