/* * This code is not copyright, and is placed in the public domain. * Feel free to use and modify. Please send modifications and/or * suggestions + bug fixes to Klas Heggemann * * Various small changes by Theo de Raadt * Parser rewritten (adding YP support) by Roland McGrath * * $Id: bootparamd.c,v 1.3 1994/01/23 21:55:56 deraadt Exp $ */ #include #include #include #include #include #include #include #include #include #include #include #include "pathnames.h" #define MAXLEN 800 struct hostent *he; static char buffer[MAXLEN]; static char hostname[MAX_MACHINE_NAME]; static char askname[MAX_MACHINE_NAME]; static char path[MAX_PATH_LEN]; static char domain_name[MAX_MACHINE_NAME]; extern void bootparamprog_1(); int debug = 0; int dolog = 0; unsigned long route_addr, inet_addr(); struct sockaddr_in my_addr; char *progname; char *bootpfile = _PATH_BOOTPARAMS; extern char *optarg; extern int optind; void usage() { fprintf(stderr, "usage: rpc.bootparamd [-d] [-s] [-r router] [-f bootparmsfile]\n"); } /* * ever familiar */ int main(argc, argv) int argc; char **argv; { SVCXPRT *transp; int i, s, pid; char *rindex(); struct hostent *he; struct stat buf; char *optstring; char c; progname = rindex(argv[0], '/'); if (progname) progname++; else progname = argv[0]; while ((c = getopt(argc, argv, "dsr:f:")) != EOF) switch (c) { case 'd': debug = 1; break; case 'r': if (isdigit(*optarg)) { route_addr = inet_addr(optarg); break; } he = gethostbyname(optarg); if (!he) { fprintf(stderr, "%s: No such host %s\n", progname, optarg); usage(); exit(1); } bcopy(he->h_addr, (char *) &route_addr, sizeof(route_addr)); break; case 'f': bootpfile = optarg; break; case 's': dolog = 1; #ifndef LOG_DAEMON openlog(progname, 0, 0); #else openlog(progname, 0, LOG_DAEMON); setlogmask(LOG_UPTO(LOG_NOTICE)); #endif break; default: usage(); exit(1); } if (stat(bootpfile, &buf)) { fprintf(stderr, "%s: ", progname); perror(bootpfile); exit(1); } if (!route_addr) { get_myaddress(&my_addr); bcopy(&my_addr.sin_addr.s_addr, &route_addr, sizeof(route_addr)); } if (!debug) daemon(); (void) pmap_unset(BOOTPARAMPROG, BOOTPARAMVERS); transp = svcudp_create(RPC_ANYSOCK); if (transp == NULL) { fprintf(stderr, "cannot create udp service.\n"); exit(1); } if (!svc_register(transp, BOOTPARAMPROG, BOOTPARAMVERS, bootparamprog_1, IPPROTO_UDP)) { fprintf(stderr, "bootparamd: unable to register BOOTPARAMPROG version %d, udp)\n", BOOTPARAMVERS); exit(1); } svc_run(); fprintf(stderr, "svc_run returned\n"); exit(1); } bp_whoami_res * bootparamproc_whoami_1(whoami) bp_whoami_arg *whoami; { long haddr; static bp_whoami_res res; if (debug) fprintf(stderr, "whoami got question for %d.%d.%d.%d\n", 255 & whoami->client_address.bp_address_u.ip_addr.net, 255 & whoami->client_address.bp_address_u.ip_addr.host, 255 & whoami->client_address.bp_address_u.ip_addr.lh, 255 & whoami->client_address.bp_address_u.ip_addr.impno); if (dolog) syslog(LOG_NOTICE, "whoami got question for %d.%d.%d.%d\n", 255 & whoami->client_address.bp_address_u.ip_addr.net, 255 & whoami->client_address.bp_address_u.ip_addr.host, 255 & whoami->client_address.bp_address_u.ip_addr.lh, 255 & whoami->client_address.bp_address_u.ip_addr.impno); bcopy((char *) &whoami->client_address.bp_address_u.ip_addr, (char *) &haddr, sizeof(haddr)); he = gethostbyaddr((char *) &haddr, sizeof(haddr), AF_INET); if (!he) goto failed; if (debug) fprintf(stderr, "This is host %s\n", he->h_name); if (dolog) syslog(LOG_NOTICE, "This is host %s\n", he->h_name); strcpy(askname, he->h_name); if (!lookup_bootparam(askname, hostname, NULL, NULL, NULL)) { res.client_name = hostname; getdomainname(domain_name, MAX_MACHINE_NAME); res.domain_name = domain_name; if (res.router_address.address_type != IP_ADDR_TYPE) { res.router_address.address_type = IP_ADDR_TYPE; bcopy(&route_addr, &res.router_address.bp_address_u.ip_addr, 4); } if (debug) fprintf(stderr, "Returning %s %s %d.%d.%d.%d\n", res.client_name, res.domain_name, 255 & res.router_address.bp_address_u.ip_addr.net, 255 & res.router_address.bp_address_u.ip_addr.host, 255 & res.router_address.bp_address_u.ip_addr.lh, 255 & res.router_address.bp_address_u.ip_addr.impno); if (dolog) syslog(LOG_NOTICE, "Returning %s %s %d.%d.%d.%d\n", res.client_name, res.domain_name, 255 & res.router_address.bp_address_u.ip_addr.net, 255 & res.router_address.bp_address_u.ip_addr.host, 255 & res.router_address.bp_address_u.ip_addr.lh, 255 & res.router_address.bp_address_u.ip_addr.impno); return (&res); } failed: if (debug) fprintf(stderr, "whoami failed\n"); if (dolog) syslog(LOG_NOTICE, "whoami failed\n"); return (NULL); } bp_getfile_res * bootparamproc_getfile_1(getfile) bp_getfile_arg *getfile; { char *where, *index(); static bp_getfile_res res; int err; if (debug) fprintf(stderr, "getfile got question for \"%s\" and file \"%s\"\n", getfile->client_name, getfile->file_id); if (dolog) syslog(LOG_NOTICE, "getfile got question for \"%s\" and file \"%s\"\n", getfile->client_name, getfile->file_id); he = NULL; he = gethostbyname(getfile->client_name); if (!he) goto failed; strcpy(askname, he->h_name); err = lookup_bootparam(askname, NULL, getfile->file_id, &res.server_name, &res.server_path); if (err == 0) { he = gethostbyname(res.server_name); if (!he) goto failed; bcopy(he->h_addr, &res.server_address.bp_address_u.ip_addr, 4); res.server_address.address_type = IP_ADDR_TYPE; } else if (err == ENOENT && !strcmp(getfile->file_id, "dump")) { /* Special for dump, answer with null strings. */ res.server_name[0] = '\0'; res.server_path[0] = '\0'; bzero(&res.server_address.bp_address_u.ip_addr, 4); } else { failed: if (debug) fprintf(stderr, "getfile failed for %s\n", getfile->client_name); if (dolog) syslog(LOG_NOTICE, "getfile failed for %s\n", getfile->client_name); return (NULL); } if (debug) fprintf(stderr, "returning server:%s path:%s address: %d.%d.%d.%d\n", res.server_name, res.server_path, 255 & res.server_address.bp_address_u.ip_addr.net, 255 & res.server_address.bp_address_u.ip_addr.host, 255 & res.server_address.bp_address_u.ip_addr.lh, 255 & res.server_address.bp_address_u.ip_addr.impno); if (dolog) syslog(LOG_NOTICE, "returning server:%s path:%s address: %d.%d.%d.%d\n", res.server_name, res.server_path, 255 & res.server_address.bp_address_u.ip_addr.net, 255 & res.server_address.bp_address_u.ip_addr.host, 255 & res.server_address.bp_address_u.ip_addr.lh, 255 & res.server_address.bp_address_u.ip_addr.impno); return (&res); } int lookup_bootparam(client, client_canonical, id, server, path) char *client; char *client_canonical; char *id; char **server; char **path; { FILE *f = fopen(bootpfile, "r"); #ifdef YP static char *ypbuf = NULL; static int ypbuflen = 0; #endif static char buf[BUFSIZ]; char *bp, *word; size_t idlen = id == NULL ? 0 : strlen(id); int contin = 0; int found = 0; if (f == NULL) return EINVAL; /* ? */ while (fgets(buf, sizeof buf, f)) { int wascontin = contin; contin = buf[strlen(buf) - 2] == '\\'; bp = buf + strspn(buf, " \t\n"); switch (wascontin) { case -1: /* Continuation of uninteresting line */ contin *= -1; continue; case 0: /* New line */ contin *= -1; if (*bp == '#') continue; if ((word = strsep(&bp, " \t\n")) == NULL) continue; #ifdef YP /* A + in the file means try YP now */ if (!strcmp(word, "+")) { char *ypdom; if (yp_get_default_domain(&ypdom) || yp_match(ypdom, "bootparams", client, strlen(client), &ypbuf, &ypbuflen)) continue; bp = ypbuf; word = client; contin *= -1; break; } #endif /* See if this line's client is the one we are * looking for */ if (strcmp(word, client) != 0) { /* * If it didn't match, try getting the * canonical host name of the client * on this line and comparing that to * the client we are looking for */ struct hostent *hp = gethostbyname(word); if (hp == NULL || strcmp(hp->h_name, client)) continue; } contin *= -1; break; case 1: /* Continued line we want to parse below */ break; } if (client_canonical) strncpy(client_canonical, word, MAX_MACHINE_NAME); /* We have found a line for CLIENT */ if (id == NULL) return 0; /* Look for a value for the parameter named by ID */ while ((word = strsep(&bp, " \t\n")) != NULL) { if (!strncmp(word, id, idlen) && word[idlen] == '=') { /* We have found the entry we want */ *server = &word[idlen + 1]; *path = strchr(*server, ':'); if (*path == NULL) /* Malformed entry */ continue; *(*path)++ = '\0'; (void) fclose(f); return 0; } } found = 1; } (void) fclose(f); return found ? ENOENT : EPERM; }