/* $NetBSD: irp_ho.c,v 1.1.1.2 2012/09/09 16:07:58 christos Exp $ */ /* * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") * Portions Copyright (c) 1996,1998 by Internet Software Consortium. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #if defined(LIBC_SCCS) && !defined(lint) static const char rcsid[] = "Id: irp_ho.c,v 1.3 2005/04/27 04:56:28 sra Exp "; #endif /* LIBC_SCCS and not lint */ /* Imports. */ #include "port_before.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "irs_p.h" #include "dns_p.h" #include "irp_p.h" #include "port_after.h" /* Definitions. */ #define MAXALIASES 35 #define MAXADDRS 35 #define Max(a,b) ((a) > (b) ? (a) : (b)) struct pvt { struct irp_p *girpdata; int warned; struct hostent host; }; /* Forward. */ static void ho_close(struct irs_ho *this); static struct hostent * ho_byname(struct irs_ho *this, const char *name); static struct hostent * ho_byname2(struct irs_ho *this, const char *name, int af); static struct hostent * ho_byaddr(struct irs_ho *this, const void *addr, int len, int af); static struct hostent * ho_next(struct irs_ho *this); static void ho_rewind(struct irs_ho *this); static void ho_minimize(struct irs_ho *this); static void free_host(struct hostent *ho); static struct addrinfo * ho_addrinfo(struct irs_ho *this, const char *name, const struct addrinfo *pai); /* Public. */ /*% * struct irs_ho * irs_irp_ho(struct irs_acc *this) * * Notes: * * Initializes the irp_ho module. * */ struct irs_ho * irs_irp_ho(struct irs_acc *this) { struct irs_ho *ho; struct pvt *pvt; if (!(ho = memget(sizeof *ho))) { errno = ENOMEM; return (NULL); } memset(ho, 0x0, sizeof *ho); if (!(pvt = memget(sizeof *pvt))) { memput(ho, sizeof *ho); errno = ENOMEM; return (NULL); } memset(pvt, 0, sizeof *pvt); pvt->girpdata = this->private; ho->private = pvt; ho->close = ho_close; ho->byname = ho_byname; ho->byname2 = ho_byname2; ho->byaddr = ho_byaddr; ho->next = ho_next; ho->rewind = ho_rewind; ho->minimize = ho_minimize; ho->addrinfo = ho_addrinfo; return (ho); } /* Methods. */ /*% * Closes down the module. * */ static void ho_close(struct irs_ho *this) { struct pvt *pvt = (struct pvt *)this->private; ho_minimize(this); free_host(&pvt->host); memput(pvt, sizeof *pvt); memput(this, sizeof *this); } /* * struct hostent * ho_byname(struct irs_ho *this, const char *name) * */ static struct hostent * ho_byname(struct irs_ho *this, const char *name) { return (ho_byname2(this, name, AF_INET)); } /* * struct hostent * ho_byname2(struct irs_ho *this, const char *name, int af) * */ static struct hostent * ho_byname2(struct irs_ho *this, const char *name, int af) { struct pvt *pvt = (struct pvt *)this->private; struct hostent *ho = &pvt->host; char *body = NULL; size_t bodylen; int code; char text[256]; if (ho->h_name != NULL && strcmp(name, ho->h_name) == 0 && af == ho->h_addrtype) { return (ho); } if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) { return (NULL); } if (irs_irp_send_command(pvt->girpdata, "gethostbyname2 %s %s", name, ADDR_T_STR(af)) != 0) return (NULL); if (irs_irp_get_full_response(pvt->girpdata, &code, text, sizeof text, &body, &bodylen) != 0) { return (NULL); } if (code == IRPD_GETHOST_OK) { free_host(ho); if (irp_unmarshall_ho(ho, body) != 0) { ho = NULL; } } else { ho = NULL; } if (body != NULL) { memput(body, bodylen); } return (ho); } /* * struct hostent * ho_byaddr(struct irs_ho *this, const void *addr, * int len, int af) * */ static struct hostent * ho_byaddr(struct irs_ho *this, const void *addr, int len, int af) { struct pvt *pvt = (struct pvt *)this->private; struct hostent *ho = &pvt->host; char *body = NULL; size_t bodylen; int code; char **p; char paddr[MAXPADDRSIZE]; char text[256]; if (ho->h_name != NULL && af == ho->h_addrtype && len == ho->h_length) { for (p = ho->h_addr_list ; *p != NULL ; p++) { if (memcmp(*p, addr, len) == 0) return (ho); } } if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) { return (NULL); } if (inet_ntop(af, addr, paddr, sizeof paddr) == NULL) { return (NULL); } if (irs_irp_send_command(pvt->girpdata, "gethostbyaddr %s %s", paddr, ADDR_T_STR(af)) != 0) { return (NULL); } if (irs_irp_get_full_response(pvt->girpdata, &code, text, sizeof text, &body, &bodylen) != 0) { return (NULL); } if (code == IRPD_GETHOST_OK) { free_host(ho); if (irp_unmarshall_ho(ho, body) != 0) { ho = NULL; } } else { ho = NULL; } if (body != NULL) { memput(body, bodylen); } return (ho); } /*% * The implementation for gethostent(3). The first time it's * called all the data is pulled from the remote(i.e. what * the maximum number of gethostent(3) calls would return) * and that data is cached. * */ static struct hostent * ho_next(struct irs_ho *this) { struct pvt *pvt = (struct pvt *)this->private; struct hostent *ho = &pvt->host; char *body; size_t bodylen; int code; char text[256]; if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) { return (NULL); } if (irs_irp_send_command(pvt->girpdata, "gethostent") != 0) { return (NULL); } if (irs_irp_get_full_response(pvt->girpdata, &code, text, sizeof text, &body, &bodylen) != 0) { return (NULL); } if (code == IRPD_GETHOST_OK) { free_host(ho); if (irp_unmarshall_ho(ho, body) != 0) { ho = NULL; } } else { ho = NULL; } if (body != NULL) { memput(body, bodylen); } return (ho); } /*% * void ho_rewind(struct irs_ho *this) * */ static void ho_rewind(struct irs_ho *this) { struct pvt *pvt = (struct pvt *)this->private; char text[256]; int code; if (irs_irp_connection_setup(pvt->girpdata, &pvt->warned) != 0) { return; } if (irs_irp_send_command(pvt->girpdata, "sethostent") != 0) { return; } code = irs_irp_read_response(pvt->girpdata, text, sizeof text); if (code != IRPD_GETHOST_SETOK) { if (irp_log_errors) { syslog(LOG_WARNING, "sethostent failed: %s", text); } } return; } /*% * void ho_minimize(struct irs_ho *this) * */ static void ho_minimize(struct irs_ho *this) { struct pvt *pvt = (struct pvt *)this->private; free_host(&pvt->host); irs_irp_disconnect(pvt->girpdata); } /*% * void free_host(struct hostent *ho) * */ static void free_host(struct hostent *ho) { char **p; if (ho == NULL) { return; } if (ho->h_name != NULL) free(ho->h_name); if (ho->h_aliases != NULL) { for (p = ho->h_aliases ; *p != NULL ; p++) free(*p); free(ho->h_aliases); } if (ho->h_addr_list != NULL) { for (p = ho->h_addr_list ; *p != NULL ; p++) free(*p); free(ho->h_addr_list); } } /* dummy */ static struct addrinfo * ho_addrinfo(struct irs_ho *this, const char *name, const struct addrinfo *pai) { UNUSED(this); UNUSED(name); UNUSED(pai); return(NULL); } /*! \file */