1 /* 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * All rights reserved. 5 * 6 * This code is derived from software donated to Berkeley by 7 * Jan-Simon Pendry. 8 * 9 * %sccs.include.redist.c% 10 * 11 * @(#)pt_tcp.c 8.1 (Berkeley) 06/05/93 12 * 13 * $Id: pt_tcp.c,v 1.1 1992/05/25 21:43:09 jsp Exp jsp $ 14 */ 15 16 #include <stdio.h> 17 #include <unistd.h> 18 #include <stdlib.h> 19 #include <errno.h> 20 #include <strings.h> 21 #include <sys/types.h> 22 #include <sys/param.h> 23 #include <sys/syslog.h> 24 #include <sys/socket.h> 25 #include <netinet/in.h> 26 #include <netdb.h> 27 28 #include "portald.h" 29 30 /* 31 * Key will be tcp/host/port[/"priv"] 32 * Create a TCP socket connected to the 33 * requested host and port. 34 * Some trailing suffix values have special meanings. 35 * An unrecognised suffix is an error. 36 */ 37 int portal_tcp(pcr, key, v, kso, fdp) 38 struct portal_cred *pcr; 39 char *key; 40 char **v; 41 int kso; 42 int *fdp; 43 { 44 char host[MAXHOSTNAMELEN]; 45 char port[MAXHOSTNAMELEN]; 46 char *p = key + (v[1] ? strlen(v[1]) : 0); 47 char *q; 48 struct hostent *hp; 49 struct servent *sp; 50 struct in_addr **ipp; 51 struct in_addr *ip[2]; 52 struct in_addr ina; 53 int s_port; 54 struct sockaddr_in sain; 55 56 q = strchr(p, '/'); 57 if (q == 0 || q - p >= sizeof(host)) 58 return (EINVAL); 59 *q = '\0'; 60 strcpy(host, p); 61 p = q++; 62 63 q = strchr(p, '/'); 64 if (q == 0 || q - p >= sizeof(port)) 65 return (EINVAL); 66 *q = '\0'; 67 strcpy(port, p); 68 p = q++; 69 70 hp = gethostbyname(host); 71 if (hp != 0) { 72 ipp = (struct in_addr **) hp->h_addr_list; 73 } else { 74 ina.s_addr = inet_addr(host); 75 if (ina.s_addr == INADDR_NONE) 76 return (EINVAL); 77 ip[0] = &ina; 78 ip[1] = 0; 79 ipp = ip; 80 } 81 82 sp = getservbyname(port, "tcp"); 83 if (sp != 0) 84 s_port = sp->s_port; 85 else { 86 s_port = atoi(port); 87 if (s_port == 0) 88 return (EINVAL); 89 } 90 91 bzero(&sain, sizeof(sain)); 92 sain.sin_len = sizeof(sain); 93 sain.sin_family = AF_INET; 94 sain.sin_port = s_port; 95 96 while (ipp[0]) { 97 int so; 98 99 so = socket(AF_INET, SOCK_STREAM, 0); 100 if (so < 0) { 101 syslog(LOG_ERR, "socket: %m"); 102 return (errno); 103 } 104 105 sain.sin_addr = *ipp[0]; 106 if (connect(so, (struct sockaddr *) &sain, sizeof(sain)) == 0) { 107 *fdp = so; 108 return (0); 109 } 110 (void) close(so); 111 112 ipp++; 113 } 114 115 return (errno); 116 } 117