slirp: Remove UDP protocol emulation (talk, cuseeme)
The UDP emulation code for talk has been commented out since the beginning of time, and unless someone who runs CU-SeeMe on qemu with user-mode networking can vouch that the special magic (a) is necessary and (b) works, let's get rid of the code. Signed-off-by: Ed Swierk <eswierk@aristanetworks.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Ed Swierk
Anthony Liguori
parent
3174ecd128
commit
97df1ee542
@ -36,11 +36,6 @@ void do_wait(int);
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#define EMU_NOCONNECT 0x10 /* Don't connect */
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/* UDP emulations */
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#define EMU_TALK 0x1
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#define EMU_NTALK 0x2
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#define EMU_CUSEEME 0x3
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struct tos_t {
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u_int16_t lport;
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u_int16_t fport;
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@ -2,9 +2,6 @@
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* User definable configuration options
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*/
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/* Undefine if you don't want talk emulation */
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#undef EMULATE_TALK
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/* Define if you want the connection to be probed */
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/* XXX Not working yet, so ignore this for now */
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#undef PROBE_CONN
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266
slirp/udp.c
266
slirp/udp.c
@ -42,7 +42,6 @@
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#include "ip_icmp.h"
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static u_int8_t udp_tos(struct socket *so);
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static void udp_emu(struct socket *so, struct mbuf *m);
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void
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udp_init(Slirp *slirp)
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@ -202,9 +201,6 @@ udp_input(register struct mbuf *m, int iphlen)
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/*
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* Now we sendto() the packet.
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*/
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if (so->so_emu)
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udp_emu(so, m);
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if(sosendto(so,m) == -1) {
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m->m_len += iphlen;
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m->m_data -= iphlen;
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@ -306,31 +302,9 @@ int udp_output(struct socket *so, struct mbuf *m,
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int
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udp_attach(struct socket *so)
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{
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struct sockaddr_in addr;
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if((so->s = socket(AF_INET,SOCK_DGRAM,0)) != -1) {
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/*
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* Here, we bind() the socket. Although not really needed
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* (sendto() on an unbound socket will bind it), it's done
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* here so that emulation of ytalk etc. don't have to do it
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*/
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addr.sin_family = AF_INET;
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addr.sin_port = 0;
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addr.sin_addr.s_addr = INADDR_ANY;
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if(bind(so->s, (struct sockaddr *)&addr, sizeof(addr))<0) {
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int lasterrno=errno;
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closesocket(so->s);
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so->s=-1;
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#ifdef _WIN32
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WSASetLastError(lasterrno);
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#else
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errno=lasterrno;
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#endif
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} else {
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/* success, insert in queue */
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so->so_expire = curtime + SO_EXPIRE;
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insque(so, &so->slirp->udb);
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}
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so->so_expire = curtime + SO_EXPIRE;
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insque(so, &so->slirp->udb);
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}
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return(so->s);
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}
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@ -344,9 +318,6 @@ udp_detach(struct socket *so)
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static const struct tos_t udptos[] = {
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{0, 53, IPTOS_LOWDELAY, 0}, /* DNS */
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{517, 517, IPTOS_LOWDELAY, EMU_TALK}, /* talk */
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{518, 518, IPTOS_LOWDELAY, EMU_NTALK}, /* ntalk */
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{0, 7648, IPTOS_LOWDELAY, EMU_CUSEEME}, /* Cu-Seeme */
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{0, 0, 0, 0}
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};
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@ -367,239 +338,6 @@ udp_tos(struct socket *so)
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return 0;
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}
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#ifdef EMULATE_TALK
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#include "talkd.h"
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#endif
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/*
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* Here, talk/ytalk/ntalk requests must be emulated
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*/
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static void
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udp_emu(struct socket *so, struct mbuf *m)
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{
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struct sockaddr_in addr;
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socklen_t addrlen = sizeof(addr);
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#ifdef EMULATE_TALK
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CTL_MSG_OLD *omsg;
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CTL_MSG *nmsg;
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char buff[sizeof(CTL_MSG)];
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u_char type;
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struct talk_request {
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struct talk_request *next;
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struct socket *udp_so;
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struct socket *tcp_so;
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} *req;
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static struct talk_request *req_tbl = 0;
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#endif
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struct cu_header {
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uint16_t d_family; // destination family
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uint16_t d_port; // destination port
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uint32_t d_addr; // destination address
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uint16_t s_family; // source family
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uint16_t s_port; // source port
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uint32_t so_addr; // source address
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uint32_t seqn; // sequence number
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uint16_t message; // message
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uint16_t data_type; // data type
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uint16_t pkt_len; // packet length
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} *cu_head;
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switch(so->so_emu) {
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#ifdef EMULATE_TALK
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case EMU_TALK:
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case EMU_NTALK:
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/*
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* Talk emulation. We always change the ctl_addr to get
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* some answers from the daemon. When an ANNOUNCE comes,
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* we send LEAVE_INVITE to the local daemons. Also when a
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* DELETE comes, we send copies to the local daemons.
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*/
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if (getsockname(so->s, (struct sockaddr *)&addr, &addrlen) < 0)
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return;
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#define IS_OLD (so->so_emu == EMU_TALK)
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#define COPY_MSG(dest, src) { dest->type = src->type; \
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dest->id_num = src->id_num; \
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dest->pid = src->pid; \
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dest->addr = src->addr; \
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dest->ctl_addr = src->ctl_addr; \
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memcpy(&dest->l_name, &src->l_name, NAME_SIZE_OLD); \
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memcpy(&dest->r_name, &src->r_name, NAME_SIZE_OLD); \
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memcpy(&dest->r_tty, &src->r_tty, TTY_SIZE); }
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#define OTOSIN(ptr, field) ((struct sockaddr_in *)&ptr->field)
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/* old_sockaddr to sockaddr_in */
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if (IS_OLD) { /* old talk */
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omsg = mtod(m, CTL_MSG_OLD*);
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nmsg = (CTL_MSG *) buff;
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type = omsg->type;
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OTOSIN(omsg, ctl_addr)->sin_port = addr.sin_port;
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OTOSIN(omsg, ctl_addr)->sin_addr = our_addr;
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pstrcpy(omsg->l_name, NAME_SIZE_OLD, getlogin());
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} else { /* new talk */
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omsg = (CTL_MSG_OLD *) buff;
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nmsg = mtod(m, CTL_MSG *);
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type = nmsg->type;
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OTOSIN(nmsg, ctl_addr)->sin_port = addr.sin_port;
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OTOSIN(nmsg, ctl_addr)->sin_addr = our_addr;
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pstrcpy(nmsg->l_name, NAME_SIZE_OLD, getlogin());
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}
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if (type == LOOK_UP)
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return; /* for LOOK_UP this is enough */
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if (IS_OLD) { /* make a copy of the message */
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COPY_MSG(nmsg, omsg);
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nmsg->vers = 1;
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nmsg->answer = 0;
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} else
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COPY_MSG(omsg, nmsg);
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/*
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* If if is an ANNOUNCE message, we go through the
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* request table to see if a tcp port has already
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* been redirected for this socket. If not, we solisten()
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* a new socket and add this entry to the table.
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* The port number of the tcp socket and our IP
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* are put to the addr field of the message structures.
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* Then a LEAVE_INVITE is sent to both local daemon
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* ports, 517 and 518. This is why we have two copies
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* of the message, one in old talk and one in new talk
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* format.
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*/
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if (type == ANNOUNCE) {
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int s;
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u_short temp_port;
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for(req = req_tbl; req; req = req->next)
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if (so == req->udp_so)
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break; /* found it */
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if (!req) { /* no entry for so, create new */
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req = (struct talk_request *)
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malloc(sizeof(struct talk_request));
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req->udp_so = so;
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req->tcp_so = solisten(0,
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OTOSIN(omsg, addr)->sin_addr.s_addr,
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OTOSIN(omsg, addr)->sin_port,
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SS_FACCEPTONCE);
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req->next = req_tbl;
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req_tbl = req;
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}
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/* replace port number in addr field */
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addrlen = sizeof(addr);
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getsockname(req->tcp_so->s,
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(struct sockaddr *) &addr,
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&addrlen);
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OTOSIN(omsg, addr)->sin_port = addr.sin_port;
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OTOSIN(omsg, addr)->sin_addr = our_addr;
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OTOSIN(nmsg, addr)->sin_port = addr.sin_port;
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OTOSIN(nmsg, addr)->sin_addr = our_addr;
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/* send LEAVE_INVITEs */
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temp_port = OTOSIN(omsg, ctl_addr)->sin_port;
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OTOSIN(omsg, ctl_addr)->sin_port = 0;
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OTOSIN(nmsg, ctl_addr)->sin_port = 0;
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omsg->type = nmsg->type = LEAVE_INVITE;
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s = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);
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addr.sin_addr = our_addr;
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addr.sin_family = AF_INET;
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addr.sin_port = htons(517);
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sendto(s, (char *)omsg, sizeof(*omsg), 0,
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(struct sockaddr *)&addr, sizeof(addr));
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addr.sin_port = htons(518);
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sendto(s, (char *)nmsg, sizeof(*nmsg), 0,
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(struct sockaddr *) &addr, sizeof(addr));
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closesocket(s) ;
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omsg->type = nmsg->type = ANNOUNCE;
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OTOSIN(omsg, ctl_addr)->sin_port = temp_port;
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OTOSIN(nmsg, ctl_addr)->sin_port = temp_port;
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}
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/*
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* If it is a DELETE message, we send a copy to the
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* local daemons. Then we delete the entry corresponding
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* to our socket from the request table.
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*/
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if (type == DELETE) {
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struct talk_request *temp_req, *req_next;
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int s;
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u_short temp_port;
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temp_port = OTOSIN(omsg, ctl_addr)->sin_port;
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OTOSIN(omsg, ctl_addr)->sin_port = 0;
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OTOSIN(nmsg, ctl_addr)->sin_port = 0;
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s = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);
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addr.sin_addr = our_addr;
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addr.sin_family = AF_INET;
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addr.sin_port = htons(517);
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sendto(s, (char *)omsg, sizeof(*omsg), 0,
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(struct sockaddr *)&addr, sizeof(addr));
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addr.sin_port = htons(518);
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sendto(s, (char *)nmsg, sizeof(*nmsg), 0,
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(struct sockaddr *)&addr, sizeof(addr));
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closesocket(s);
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OTOSIN(omsg, ctl_addr)->sin_port = temp_port;
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OTOSIN(nmsg, ctl_addr)->sin_port = temp_port;
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/* delete table entry */
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if (so == req_tbl->udp_so) {
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temp_req = req_tbl;
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req_tbl = req_tbl->next;
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free(temp_req);
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} else {
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temp_req = req_tbl;
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for(req = req_tbl->next; req; req = req_next) {
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req_next = req->next;
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if (so == req->udp_so) {
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temp_req->next = req_next;
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free(req);
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break;
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} else {
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temp_req = req;
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}
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}
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}
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}
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return;
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#endif
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case EMU_CUSEEME:
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/*
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* Cu-SeeMe emulation.
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* Hopefully the packet is more that 16 bytes long. We don't
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* do any other tests, just replace the address and port
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* fields.
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*/
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if (m->m_len >= sizeof (*cu_head)) {
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if (getsockname(so->s, (struct sockaddr *)&addr, &addrlen) < 0)
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return;
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cu_head = mtod(m, struct cu_header *);
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cu_head->s_port = addr.sin_port;
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cu_head->so_addr = our_addr.s_addr;
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}
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return;
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}
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}
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struct socket *
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udp_listen(Slirp *slirp, u_int32_t haddr, u_int hport, u_int32_t laddr,
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u_int lport, int flags)
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