| /* |
| * Copyright (c) 1982, 1986, 1988, 1990, 1993 |
| * The Regents of the University of California. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the University nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * @(#)udp_usrreq.c 8.4 (Berkeley) 1/21/94 |
| * udp_usrreq.c,v 1.4 1994/10/02 17:48:45 phk Exp |
| */ |
| |
| /* |
| * Changes and additions relating to SLiRP |
| * Copyright (c) 1995 Danny Gasparovski. |
| * |
| * Please read the file COPYRIGHT for the |
| * terms and conditions of the copyright. |
| */ |
| |
| #include <slirp.h> |
| #include "ip_icmp.h" |
| |
| #ifdef LOG_ENABLED |
| struct udpstat udpstat; |
| #endif |
| |
| struct socket udb; |
| |
| static u_int8_t udp_tos(struct socket *so); |
| static void udp_emu(struct socket *so, struct mbuf *m); |
| |
| /* |
| * UDP protocol implementation. |
| * Per RFC 768, August, 1980. |
| */ |
| #ifndef COMPAT_42 |
| #define UDPCKSUM 1 |
| #else |
| #define UDPCKSUM 0 /* XXX */ |
| #endif |
| |
| struct socket *udp_last_so = &udb; |
| |
| void |
| udp_init(void) |
| { |
| udb.so_next = udb.so_prev = &udb; |
| } |
| /* m->m_data points at ip packet header |
| * m->m_len length ip packet |
| * ip->ip_len length data (IPDU) |
| */ |
| void |
| udp_input(register struct mbuf *m, int iphlen) |
| { |
| register struct ip *ip; |
| register struct udphdr *uh; |
| /* struct mbuf *opts = 0;*/ |
| int len; |
| struct ip save_ip; |
| struct socket *so; |
| |
| DEBUG_CALL("udp_input"); |
| DEBUG_ARG("m = %lx", (long)m); |
| DEBUG_ARG("iphlen = %d", iphlen); |
| |
| STAT(udpstat.udps_ipackets++); |
| |
| /* |
| * Strip IP options, if any; should skip this, |
| * make available to user, and use on returned packets, |
| * but we don't yet have a way to check the checksum |
| * with options still present. |
| */ |
| if(iphlen > sizeof(struct ip)) { |
| ip_stripoptions(m, (struct mbuf *)0); |
| iphlen = sizeof(struct ip); |
| } |
| |
| /* |
| * Get IP and UDP header together in first mbuf. |
| */ |
| ip = mtod(m, struct ip *); |
| uh = (struct udphdr *)((caddr_t)ip + iphlen); |
| |
| /* |
| * Make mbuf data length reflect UDP length. |
| * If not enough data to reflect UDP length, drop. |
| */ |
| len = ntohs((u_int16_t)uh->uh_ulen); |
| |
| if (ip->ip_len != len) { |
| if (len > ip->ip_len) { |
| STAT(udpstat.udps_badlen++); |
| goto bad; |
| } |
| m_adj(m, len - ip->ip_len); |
| ip->ip_len = len; |
| } |
| |
| /* |
| * Save a copy of the IP header in case we want restore it |
| * for sending an ICMP error message in response. |
| */ |
| save_ip = *ip; |
| save_ip.ip_len+= iphlen; /* tcp_input subtracts this */ |
| |
| /* |
| * Checksum extended UDP header and data. |
| */ |
| if (UDPCKSUM && uh->uh_sum) { |
| memset(&((struct ipovly *)ip)->ih_mbuf, 0, sizeof(struct mbuf_ptr)); |
| ((struct ipovly *)ip)->ih_x1 = 0; |
| ((struct ipovly *)ip)->ih_len = uh->uh_ulen; |
| /* keep uh_sum for ICMP reply |
| * uh->uh_sum = cksum(m, len + sizeof (struct ip)); |
| * if (uh->uh_sum) { |
| */ |
| if(cksum(m, len + sizeof(struct ip))) { |
| STAT(udpstat.udps_badsum++); |
| goto bad; |
| } |
| } |
| |
| /* |
| * handle DHCP/BOOTP |
| */ |
| if (ntohs(uh->uh_dport) == BOOTP_SERVER) { |
| bootp_input(m); |
| goto bad; |
| } |
| |
| if (slirp_restrict) |
| goto bad; |
| |
| /* |
| * handle TFTP |
| */ |
| if (ntohs(uh->uh_dport) == TFTP_SERVER) { |
| tftp_input(m); |
| goto bad; |
| } |
| |
| /* |
| * Locate pcb for datagram. |
| */ |
| so = udp_last_so; |
| if (so->so_lport != uh->uh_sport || |
| so->so_laddr.s_addr != ip->ip_src.s_addr) { |
| struct socket *tmp; |
| |
| for (tmp = udb.so_next; tmp != &udb; tmp = tmp->so_next) { |
| if (tmp->so_lport == uh->uh_sport && |
| tmp->so_laddr.s_addr == ip->ip_src.s_addr) { |
| so = tmp; |
| break; |
| } |
| } |
| if (tmp == &udb) { |
| so = NULL; |
| } else { |
| STAT(udpstat.udpps_pcbcachemiss++); |
| udp_last_so = so; |
| } |
| } |
| |
| if (so == NULL) { |
| /* |
| * If there's no socket for this packet, |
| * create one |
| */ |
| if ((so = socreate()) == NULL) goto bad; |
| if(udp_attach(so) == -1) { |
| DEBUG_MISC((dfd," udp_attach errno = %d-%s\n", |
| errno,strerror(errno))); |
| sofree(so); |
| goto bad; |
| } |
| |
| /* |
| * Setup fields |
| */ |
| /* udp_last_so = so; */ |
| so->so_laddr = ip->ip_src; |
| so->so_lport = uh->uh_sport; |
| |
| if ((so->so_iptos = udp_tos(so)) == 0) |
| so->so_iptos = ip->ip_tos; |
| |
| /* |
| * XXXXX Here, check if it's in udpexec_list, |
| * and if it is, do the fork_exec() etc. |
| */ |
| } |
| |
| so->so_faddr = ip->ip_dst; /* XXX */ |
| so->so_fport = uh->uh_dport; /* XXX */ |
| |
| iphlen += sizeof(struct udphdr); |
| m->m_len -= iphlen; |
| m->m_data += iphlen; |
| |
| /* |
| * Now we sendto() the packet. |
| */ |
| if (so->so_emu) |
| udp_emu(so, m); |
| |
| if(sosendto(so,m) == -1) { |
| m->m_len += iphlen; |
| m->m_data -= iphlen; |
| *ip=save_ip; |
| DEBUG_MISC((dfd,"udp tx errno = %d-%s\n",errno,strerror(errno))); |
| icmp_error(m, ICMP_UNREACH,ICMP_UNREACH_NET, 0,strerror(errno)); |
| } |
| |
| m_free(so->so_m); /* used for ICMP if error on sorecvfrom */ |
| |
| /* restore the orig mbuf packet */ |
| m->m_len += iphlen; |
| m->m_data -= iphlen; |
| *ip=save_ip; |
| so->so_m=m; /* ICMP backup */ |
| |
| return; |
| bad: |
| m_freem(m); |
| /* if (opts) m_freem(opts); */ |
| return; |
| } |
| |
| int udp_output2(struct socket *so, struct mbuf *m, |
| struct sockaddr_in *saddr, struct sockaddr_in *daddr, |
| int iptos) |
| { |
| register struct udpiphdr *ui; |
| int error = 0; |
| |
| DEBUG_CALL("udp_output"); |
| DEBUG_ARG("so = %lx", (long)so); |
| DEBUG_ARG("m = %lx", (long)m); |
| DEBUG_ARG("saddr = %lx", (long)saddr->sin_addr.s_addr); |
| DEBUG_ARG("daddr = %lx", (long)daddr->sin_addr.s_addr); |
| |
| /* |
| * Adjust for header |
| */ |
| m->m_data -= sizeof(struct udpiphdr); |
| m->m_len += sizeof(struct udpiphdr); |
| |
| /* |
| * Fill in mbuf with extended UDP header |
| * and addresses and length put into network format. |
| */ |
| ui = mtod(m, struct udpiphdr *); |
| memset(&ui->ui_i.ih_mbuf, 0 , sizeof(struct mbuf_ptr)); |
| ui->ui_x1 = 0; |
| ui->ui_pr = IPPROTO_UDP; |
| ui->ui_len = htons(m->m_len - sizeof(struct ip)); /* + sizeof (struct udphdr)); */ |
| /* XXXXX Check for from-one-location sockets, or from-any-location sockets */ |
| ui->ui_src = saddr->sin_addr; |
| ui->ui_dst = daddr->sin_addr; |
| ui->ui_sport = saddr->sin_port; |
| ui->ui_dport = daddr->sin_port; |
| ui->ui_ulen = ui->ui_len; |
| |
| /* |
| * Stuff checksum and output datagram. |
| */ |
| ui->ui_sum = 0; |
| if (UDPCKSUM) { |
| if ((ui->ui_sum = cksum(m, /* sizeof (struct udpiphdr) + */ m->m_len)) == 0) |
| ui->ui_sum = 0xffff; |
| } |
| ((struct ip *)ui)->ip_len = m->m_len; |
| |
| ((struct ip *)ui)->ip_ttl = IPDEFTTL; |
| ((struct ip *)ui)->ip_tos = iptos; |
| |
| STAT(udpstat.udps_opackets++); |
| |
| error = ip_output(so, m); |
| |
| return (error); |
| } |
| |
| int udp_output(struct socket *so, struct mbuf *m, |
| struct sockaddr_in *addr) |
| |
| { |
| struct sockaddr_in saddr, daddr; |
| |
| saddr = *addr; |
| if ((so->so_faddr.s_addr & vnetwork_mask.s_addr) == vnetwork_addr.s_addr) { |
| if ((so->so_faddr.s_addr & ~vnetwork_mask.s_addr) == |
| ~vnetwork_mask.s_addr) { |
| saddr.sin_addr = vhost_addr; |
| } else if (addr->sin_addr.s_addr == loopback_addr.s_addr || |
| so->so_faddr.s_addr != vhost_addr.s_addr) { |
| saddr.sin_addr = so->so_faddr; |
| } |
| } |
| daddr.sin_addr = so->so_laddr; |
| daddr.sin_port = so->so_lport; |
| |
| return udp_output2(so, m, &saddr, &daddr, so->so_iptos); |
| } |
| |
| int |
| udp_attach(struct socket *so) |
| { |
| struct sockaddr_in addr; |
| |
| if((so->s = socket(AF_INET,SOCK_DGRAM,0)) != -1) { |
| /* |
| * Here, we bind() the socket. Although not really needed |
| * (sendto() on an unbound socket will bind it), it's done |
| * here so that emulation of ytalk etc. don't have to do it |
| */ |
| addr.sin_family = AF_INET; |
| addr.sin_port = 0; |
| addr.sin_addr.s_addr = INADDR_ANY; |
| if(bind(so->s, (struct sockaddr *)&addr, sizeof(addr))<0) { |
| int lasterrno=errno; |
| closesocket(so->s); |
| so->s=-1; |
| #ifdef _WIN32 |
| WSASetLastError(lasterrno); |
| #else |
| errno=lasterrno; |
| #endif |
| } else { |
| /* success, insert in queue */ |
| so->so_expire = curtime + SO_EXPIRE; |
| insque(so,&udb); |
| } |
| } |
| return(so->s); |
| } |
| |
| void |
| udp_detach(struct socket *so) |
| { |
| closesocket(so->s); |
| /* if (so->so_m) m_free(so->so_m); done by sofree */ |
| |
| sofree(so); |
| } |
| |
| static const struct tos_t udptos[] = { |
| {0, 53, IPTOS_LOWDELAY, 0}, /* DNS */ |
| {517, 517, IPTOS_LOWDELAY, EMU_TALK}, /* talk */ |
| {518, 518, IPTOS_LOWDELAY, EMU_NTALK}, /* ntalk */ |
| {0, 7648, IPTOS_LOWDELAY, EMU_CUSEEME}, /* Cu-Seeme */ |
| {0, 0, 0, 0} |
| }; |
| |
| static u_int8_t |
| udp_tos(struct socket *so) |
| { |
| int i = 0; |
| |
| while(udptos[i].tos) { |
| if ((udptos[i].fport && ntohs(so->so_fport) == udptos[i].fport) || |
| (udptos[i].lport && ntohs(so->so_lport) == udptos[i].lport)) { |
| so->so_emu = udptos[i].emu; |
| return udptos[i].tos; |
| } |
| i++; |
| } |
| |
| return 0; |
| } |
| |
| #ifdef EMULATE_TALK |
| #include "talkd.h" |
| #endif |
| |
| /* |
| * Here, talk/ytalk/ntalk requests must be emulated |
| */ |
| static void |
| udp_emu(struct socket *so, struct mbuf *m) |
| { |
| struct sockaddr_in addr; |
| socklen_t addrlen = sizeof(addr); |
| #ifdef EMULATE_TALK |
| CTL_MSG_OLD *omsg; |
| CTL_MSG *nmsg; |
| char buff[sizeof(CTL_MSG)]; |
| u_char type; |
| |
| struct talk_request { |
| struct talk_request *next; |
| struct socket *udp_so; |
| struct socket *tcp_so; |
| } *req; |
| |
| static struct talk_request *req_tbl = 0; |
| |
| #endif |
| |
| struct cu_header { |
| uint16_t d_family; // destination family |
| uint16_t d_port; // destination port |
| uint32_t d_addr; // destination address |
| uint16_t s_family; // source family |
| uint16_t s_port; // source port |
| uint32_t so_addr; // source address |
| uint32_t seqn; // sequence number |
| uint16_t message; // message |
| uint16_t data_type; // data type |
| uint16_t pkt_len; // packet length |
| } *cu_head; |
| |
| switch(so->so_emu) { |
| |
| #ifdef EMULATE_TALK |
| case EMU_TALK: |
| case EMU_NTALK: |
| /* |
| * Talk emulation. We always change the ctl_addr to get |
| * some answers from the daemon. When an ANNOUNCE comes, |
| * we send LEAVE_INVITE to the local daemons. Also when a |
| * DELETE comes, we send copies to the local daemons. |
| */ |
| if (getsockname(so->s, (struct sockaddr *)&addr, &addrlen) < 0) |
| return; |
| |
| #define IS_OLD (so->so_emu == EMU_TALK) |
| |
| #define COPY_MSG(dest, src) { dest->type = src->type; \ |
| dest->id_num = src->id_num; \ |
| dest->pid = src->pid; \ |
| dest->addr = src->addr; \ |
| dest->ctl_addr = src->ctl_addr; \ |
| memcpy(&dest->l_name, &src->l_name, NAME_SIZE_OLD); \ |
| memcpy(&dest->r_name, &src->r_name, NAME_SIZE_OLD); \ |
| memcpy(&dest->r_tty, &src->r_tty, TTY_SIZE); } |
| |
| #define OTOSIN(ptr, field) ((struct sockaddr_in *)&ptr->field) |
| /* old_sockaddr to sockaddr_in */ |
| |
| |
| if (IS_OLD) { /* old talk */ |
| omsg = mtod(m, CTL_MSG_OLD*); |
| nmsg = (CTL_MSG *) buff; |
| type = omsg->type; |
| OTOSIN(omsg, ctl_addr)->sin_port = addr.sin_port; |
| OTOSIN(omsg, ctl_addr)->sin_addr = our_addr; |
| pstrcpy(omsg->l_name, NAME_SIZE_OLD, getlogin()); |
| } else { /* new talk */ |
| omsg = (CTL_MSG_OLD *) buff; |
| nmsg = mtod(m, CTL_MSG *); |
| type = nmsg->type; |
| OTOSIN(nmsg, ctl_addr)->sin_port = addr.sin_port; |
| OTOSIN(nmsg, ctl_addr)->sin_addr = our_addr; |
| pstrcpy(nmsg->l_name, NAME_SIZE_OLD, getlogin()); |
| } |
| |
| if (type == LOOK_UP) |
| return; /* for LOOK_UP this is enough */ |
| |
| if (IS_OLD) { /* make a copy of the message */ |
| COPY_MSG(nmsg, omsg); |
| nmsg->vers = 1; |
| nmsg->answer = 0; |
| } else |
| COPY_MSG(omsg, nmsg); |
| |
| /* |
| * If if is an ANNOUNCE message, we go through the |
| * request table to see if a tcp port has already |
| * been redirected for this socket. If not, we solisten() |
| * a new socket and add this entry to the table. |
| * The port number of the tcp socket and our IP |
| * are put to the addr field of the message structures. |
| * Then a LEAVE_INVITE is sent to both local daemon |
| * ports, 517 and 518. This is why we have two copies |
| * of the message, one in old talk and one in new talk |
| * format. |
| */ |
| |
| if (type == ANNOUNCE) { |
| int s; |
| u_short temp_port; |
| |
| for(req = req_tbl; req; req = req->next) |
| if (so == req->udp_so) |
| break; /* found it */ |
| |
| if (!req) { /* no entry for so, create new */ |
| req = (struct talk_request *) |
| malloc(sizeof(struct talk_request)); |
| req->udp_so = so; |
| req->tcp_so = solisten(0, |
| OTOSIN(omsg, addr)->sin_addr.s_addr, |
| OTOSIN(omsg, addr)->sin_port, |
| SS_FACCEPTONCE); |
| req->next = req_tbl; |
| req_tbl = req; |
| } |
| |
| /* replace port number in addr field */ |
| addrlen = sizeof(addr); |
| getsockname(req->tcp_so->s, |
| (struct sockaddr *) &addr, |
| &addrlen); |
| OTOSIN(omsg, addr)->sin_port = addr.sin_port; |
| OTOSIN(omsg, addr)->sin_addr = our_addr; |
| OTOSIN(nmsg, addr)->sin_port = addr.sin_port; |
| OTOSIN(nmsg, addr)->sin_addr = our_addr; |
| |
| /* send LEAVE_INVITEs */ |
| temp_port = OTOSIN(omsg, ctl_addr)->sin_port; |
| OTOSIN(omsg, ctl_addr)->sin_port = 0; |
| OTOSIN(nmsg, ctl_addr)->sin_port = 0; |
| omsg->type = nmsg->type = LEAVE_INVITE; |
| |
| s = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP); |
| addr.sin_addr = our_addr; |
| addr.sin_family = AF_INET; |
| addr.sin_port = htons(517); |
| sendto(s, (char *)omsg, sizeof(*omsg), 0, |
| (struct sockaddr *)&addr, sizeof(addr)); |
| addr.sin_port = htons(518); |
| sendto(s, (char *)nmsg, sizeof(*nmsg), 0, |
| (struct sockaddr *) &addr, sizeof(addr)); |
| closesocket(s) ; |
| |
| omsg->type = nmsg->type = ANNOUNCE; |
| OTOSIN(omsg, ctl_addr)->sin_port = temp_port; |
| OTOSIN(nmsg, ctl_addr)->sin_port = temp_port; |
| } |
| |
| /* |
| * If it is a DELETE message, we send a copy to the |
| * local daemons. Then we delete the entry corresponding |
| * to our socket from the request table. |
| */ |
| |
| if (type == DELETE) { |
| struct talk_request *temp_req, *req_next; |
| int s; |
| u_short temp_port; |
| |
| temp_port = OTOSIN(omsg, ctl_addr)->sin_port; |
| OTOSIN(omsg, ctl_addr)->sin_port = 0; |
| OTOSIN(nmsg, ctl_addr)->sin_port = 0; |
| |
| s = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP); |
| addr.sin_addr = our_addr; |
| addr.sin_family = AF_INET; |
| addr.sin_port = htons(517); |
| sendto(s, (char *)omsg, sizeof(*omsg), 0, |
| (struct sockaddr *)&addr, sizeof(addr)); |
| addr.sin_port = htons(518); |
| sendto(s, (char *)nmsg, sizeof(*nmsg), 0, |
| (struct sockaddr *)&addr, sizeof(addr)); |
| closesocket(s); |
| |
| OTOSIN(omsg, ctl_addr)->sin_port = temp_port; |
| OTOSIN(nmsg, ctl_addr)->sin_port = temp_port; |
| |
| /* delete table entry */ |
| if (so == req_tbl->udp_so) { |
| temp_req = req_tbl; |
| req_tbl = req_tbl->next; |
| free(temp_req); |
| } else { |
| temp_req = req_tbl; |
| for(req = req_tbl->next; req; req = req_next) { |
| req_next = req->next; |
| if (so == req->udp_so) { |
| temp_req->next = req_next; |
| free(req); |
| break; |
| } else { |
| temp_req = req; |
| } |
| } |
| } |
| } |
| |
| return; |
| #endif |
| |
| case EMU_CUSEEME: |
| |
| /* |
| * Cu-SeeMe emulation. |
| * Hopefully the packet is more that 16 bytes long. We don't |
| * do any other tests, just replace the address and port |
| * fields. |
| */ |
| if (m->m_len >= sizeof (*cu_head)) { |
| if (getsockname(so->s, (struct sockaddr *)&addr, &addrlen) < 0) |
| return; |
| cu_head = mtod(m, struct cu_header *); |
| cu_head->s_port = addr.sin_port; |
| cu_head->so_addr = our_addr.s_addr; |
| } |
| |
| return; |
| } |
| } |
| |
| struct socket * |
| udp_listen(u_int32_t haddr, u_int hport, u_int32_t laddr, u_int lport, |
| int flags) |
| { |
| struct sockaddr_in addr; |
| struct socket *so; |
| socklen_t addrlen = sizeof(struct sockaddr_in), opt = 1; |
| |
| if ((so = socreate()) == NULL) { |
| free(so); |
| return NULL; |
| } |
| so->s = socket(AF_INET,SOCK_DGRAM,0); |
| so->so_expire = curtime + SO_EXPIRE; |
| insque(so,&udb); |
| |
| addr.sin_family = AF_INET; |
| addr.sin_addr.s_addr = haddr; |
| addr.sin_port = hport; |
| |
| if (bind(so->s,(struct sockaddr *)&addr, addrlen) < 0) { |
| udp_detach(so); |
| return NULL; |
| } |
| setsockopt(so->s,SOL_SOCKET,SO_REUSEADDR,(char *)&opt,sizeof(int)); |
| /* setsockopt(so->s,SOL_SOCKET,SO_OOBINLINE,(char *)&opt,sizeof(int)); */ |
| |
| getsockname(so->s,(struct sockaddr *)&addr,&addrlen); |
| so->so_fport = addr.sin_port; |
| if (addr.sin_addr.s_addr == 0 || |
| addr.sin_addr.s_addr == loopback_addr.s_addr) { |
| so->so_faddr = vhost_addr; |
| } else { |
| so->so_faddr = addr.sin_addr; |
| } |
| so->so_lport = lport; |
| so->so_laddr.s_addr = laddr; |
| if (flags != SS_FACCEPTONCE) |
| so->so_expire = 0; |
| |
| so->so_state = SS_ISFCONNECTED; |
| |
| return so; |
| } |