1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * The Dynix/PTX TLI implementation is not quite compatible with System V 3*0Sstevel@tonic-gate * Release 4. Some important functions are not present so we are limited to 4*0Sstevel@tonic-gate * IP-based services. 5*0Sstevel@tonic-gate * 6*0Sstevel@tonic-gate * Diagnostics are reported through syslog(3). 7*0Sstevel@tonic-gate * 8*0Sstevel@tonic-gate * Author: Wietse Venema, Eindhoven University of Technology, The Netherlands. 9*0Sstevel@tonic-gate */ 10*0Sstevel@tonic-gate 11*0Sstevel@tonic-gate #ifndef lint 12*0Sstevel@tonic-gate static char sccsid[] = "@(#) ptx.c 1.3 94/12/28 17:42:38"; 13*0Sstevel@tonic-gate #endif 14*0Sstevel@tonic-gate 15*0Sstevel@tonic-gate #ifdef PTX 16*0Sstevel@tonic-gate 17*0Sstevel@tonic-gate /* System libraries. */ 18*0Sstevel@tonic-gate 19*0Sstevel@tonic-gate #include <sys/types.h> 20*0Sstevel@tonic-gate #include <sys/tiuser.h> 21*0Sstevel@tonic-gate #include <sys/socket.h> 22*0Sstevel@tonic-gate #include <stropts.h> 23*0Sstevel@tonic-gate #include <netinet/in.h> 24*0Sstevel@tonic-gate #include <netdb.h> 25*0Sstevel@tonic-gate #include <stdio.h> 26*0Sstevel@tonic-gate #include <syslog.h> 27*0Sstevel@tonic-gate 28*0Sstevel@tonic-gate /* Local stuff. */ 29*0Sstevel@tonic-gate 30*0Sstevel@tonic-gate #include "tcpd.h" 31*0Sstevel@tonic-gate 32*0Sstevel@tonic-gate /* Forward declarations. */ 33*0Sstevel@tonic-gate 34*0Sstevel@tonic-gate static void ptx_sink(); 35*0Sstevel@tonic-gate 36*0Sstevel@tonic-gate /* tli_host - determine TLI endpoint info, PTX version */ 37*0Sstevel@tonic-gate 38*0Sstevel@tonic-gate void tli_host(request) 39*0Sstevel@tonic-gate struct request_info *request; 40*0Sstevel@tonic-gate { 41*0Sstevel@tonic-gate static struct sockaddr_in client; 42*0Sstevel@tonic-gate static struct sockaddr_in server; 43*0Sstevel@tonic-gate 44*0Sstevel@tonic-gate /* 45*0Sstevel@tonic-gate * getpeerinaddr() was suggested by someone at Sequent. It seems to work 46*0Sstevel@tonic-gate * with connection-oriented (TCP) services such as rlogind and telnetd, 47*0Sstevel@tonic-gate * but it returns 0.0.0.0 with datagram (UDP) services. No problem: UDP 48*0Sstevel@tonic-gate * needs special treatment anyway, in case we must refuse service. 49*0Sstevel@tonic-gate */ 50*0Sstevel@tonic-gate 51*0Sstevel@tonic-gate if (getpeerinaddr(request->fd, &client, sizeof(client)) == 0 52*0Sstevel@tonic-gate && client.sin_addr.s_addr != 0) { 53*0Sstevel@tonic-gate request->client->sin = &client; 54*0Sstevel@tonic-gate if (getmyinaddr(request->fd, &server, sizeof(server)) == 0) { 55*0Sstevel@tonic-gate request->server->sin = &server; 56*0Sstevel@tonic-gate } else { 57*0Sstevel@tonic-gate tcpd_warn("warning: getmyinaddr: %m"); 58*0Sstevel@tonic-gate } 59*0Sstevel@tonic-gate sock_methods(request); 60*0Sstevel@tonic-gate 61*0Sstevel@tonic-gate } else { 62*0Sstevel@tonic-gate 63*0Sstevel@tonic-gate /* 64*0Sstevel@tonic-gate * Another suggestion was to temporarily switch to the socket 65*0Sstevel@tonic-gate * interface, identify the endpoint addresses with socket calls, then 66*0Sstevel@tonic-gate * to switch back to TLI. This seems to works OK with UDP services, 67*0Sstevel@tonic-gate * which is exactly what we should be looking at right now. 68*0Sstevel@tonic-gate */ 69*0Sstevel@tonic-gate 70*0Sstevel@tonic-gate #define SWAP_MODULE(f, old, new) (ioctl(f, I_POP, old), ioctl(f, I_PUSH, new)) 71*0Sstevel@tonic-gate 72*0Sstevel@tonic-gate if (SWAP_MODULE(request->fd, "timod", "sockmod") != 0) 73*0Sstevel@tonic-gate tcpd_warn("replace timod by sockmod: %m"); 74*0Sstevel@tonic-gate sock_host(request); 75*0Sstevel@tonic-gate if (SWAP_MODULE(request->fd, "sockmod", "timod") != 0) 76*0Sstevel@tonic-gate tcpd_warn("replace sockmod by timod: %m"); 77*0Sstevel@tonic-gate if (request->sink != 0) 78*0Sstevel@tonic-gate request->sink = ptx_sink; 79*0Sstevel@tonic-gate } 80*0Sstevel@tonic-gate } 81*0Sstevel@tonic-gate 82*0Sstevel@tonic-gate /* ptx_sink - absorb unreceived IP datagram */ 83*0Sstevel@tonic-gate 84*0Sstevel@tonic-gate static void ptx_sink(fd) 85*0Sstevel@tonic-gate int fd; 86*0Sstevel@tonic-gate { 87*0Sstevel@tonic-gate char buf[BUFSIZ]; 88*0Sstevel@tonic-gate struct sockaddr sa; 89*0Sstevel@tonic-gate int size = sizeof(sa); 90*0Sstevel@tonic-gate 91*0Sstevel@tonic-gate /* 92*0Sstevel@tonic-gate * Eat up the not-yet received datagram. Where needed, switch to the 93*0Sstevel@tonic-gate * socket programming interface. 94*0Sstevel@tonic-gate */ 95*0Sstevel@tonic-gate 96*0Sstevel@tonic-gate if (ioctl(fd, I_FIND, "timod") != 0) 97*0Sstevel@tonic-gate ioctl(fd, I_POP, "timod"); 98*0Sstevel@tonic-gate if (ioctl(fd, I_FIND, "sockmod") == 0) 99*0Sstevel@tonic-gate ioctl(fd, I_PUSH, "sockmod"); 100*0Sstevel@tonic-gate (void) recvfrom(fd, buf, sizeof(buf), 0, &sa, &size); 101*0Sstevel@tonic-gate } 102*0Sstevel@tonic-gate 103*0Sstevel@tonic-gate #endif /* PTX */ 104