/* $NetBSD: nis_nw.c,v 1.1.1.2 2012/09/09 16:07:56 christos Exp $ */ /* * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") * Copyright (c) 1996,1999 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: nis_nw.c,v 1.4 2005/04/27 04:56:33 sra Exp "; #endif /* LIBC_SCCS and not lint */ /* Imports */ #include "port_before.h" #ifndef WANT_IRS_NIS static int __bind_irs_nis_unneeded; #else #include #include #include #include #include #ifdef T_NULL #undef T_NULL /* Silence re-definition warning of T_NULL. */ #endif #include #include #include #include #include #include #include #include #include #include #include #include "port_after.h" #include "irs_p.h" #include "nis_p.h" /* Definitions */ #define MAXALIASES 35 #define MAXADDRSIZE 4 struct pvt { int needrewind; char * nis_domain; char * curkey_data; int curkey_len; char * curval_data; int curval_len; struct nwent nwent; char * nwbuf; char * aliases[MAXALIASES + 1]; u_char addr[MAXADDRSIZE]; struct __res_state * res; void (*free_res)(void *); }; enum do_what { do_none = 0x0, do_key = 0x1, do_val = 0x2, do_all = 0x3 }; static /*const*/ char networks_byname[] = "networks.byname"; static /*const*/ char networks_byaddr[] = "networks.byaddr"; /* Forward */ static void nw_close(struct irs_nw *); static struct nwent * nw_byname(struct irs_nw *, const char *, int); static struct nwent * nw_byaddr(struct irs_nw *, void *, int, int); static struct nwent * nw_next(struct irs_nw *); static void nw_rewind(struct irs_nw *); static void nw_minimize(struct irs_nw *); static struct __res_state * nw_res_get(struct irs_nw *this); static void nw_res_set(struct irs_nw *this, struct __res_state *res, void (*free_res)(void *)); static struct nwent * makenwent(struct irs_nw *this); static void nisfree(struct pvt *, enum do_what); static int init(struct irs_nw *this); /* Public */ struct irs_nw * irs_nis_nw(struct irs_acc *this) { struct irs_nw *nw; struct pvt *pvt; if (!(pvt = memget(sizeof *pvt))) { errno = ENOMEM; return (NULL); } memset(pvt, 0, sizeof *pvt); if (!(nw = memget(sizeof *nw))) { memput(pvt, sizeof *pvt); errno = ENOMEM; return (NULL); } memset(nw, 0x5e, sizeof *nw); pvt->needrewind = 1; pvt->nis_domain = ((struct nis_p *)this->private)->domain; nw->private = pvt; nw->close = nw_close; nw->byname = nw_byname; nw->byaddr = nw_byaddr; nw->next = nw_next; nw->rewind = nw_rewind; nw->minimize = nw_minimize; nw->res_get = nw_res_get; nw->res_set = nw_res_set; return (nw); } /* Methods */ static void nw_close(struct irs_nw *this) { struct pvt *pvt = (struct pvt *)this->private; nw_minimize(this); if (pvt->res && pvt->free_res) (*pvt->free_res)(pvt->res); if (pvt->nwbuf) free(pvt->nwbuf); memput(pvt, sizeof *pvt); memput(this, sizeof *this); } static struct nwent * nw_byaddr(struct irs_nw *this, void *net, int length, int af) { struct pvt *pvt = (struct pvt *)this->private; char tmp[sizeof "255.255.255.255/32"], *t; int r; if (init(this) == -1) return (NULL); if (af != AF_INET) { RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL); errno = EAFNOSUPPORT; return (NULL); } nisfree(pvt, do_val); /* Try it with /CIDR first. */ if (inet_net_ntop(AF_INET, net, length, tmp, sizeof tmp) == NULL) { RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL); return (NULL); } r = yp_match(pvt->nis_domain, networks_byaddr, tmp, strlen(tmp), &pvt->curval_data, &pvt->curval_len); if (r != 0) { /* Give it a shot without the /CIDR. */ if ((t = strchr(tmp, '/')) != NULL) { *t = '\0'; r = yp_match(pvt->nis_domain, networks_byaddr, tmp, strlen(tmp), &pvt->curval_data, &pvt->curval_len); } if (r != 0) { RES_SET_H_ERRNO(pvt->res, HOST_NOT_FOUND); return (NULL); } } return (makenwent(this)); } static struct nwent * nw_byname(struct irs_nw *this, const char *name, int af) { struct pvt *pvt = (struct pvt *)this->private; int r; char *tmp; if (init(this) == -1) return (NULL); if (af != AF_INET) { RES_SET_H_ERRNO(pvt->res, NETDB_INTERNAL); errno = EAFNOSUPPORT; return (NULL); } nisfree(pvt, do_val); DE_CONST(name, tmp); r = yp_match(pvt->nis_domain, networks_byname, tmp, strlen(tmp), &pvt->curval_data, &pvt->curval_len); if (r != 0) { RES_SET_H_ERRNO(pvt->res, HOST_NOT_FOUND); return (NULL); } return (makenwent(this)); } static void nw_rewind(struct irs_nw *this) { struct pvt *pvt = (struct pvt *)this->private; pvt->needrewind = 1; } static struct nwent * nw_next(struct irs_nw *this) { struct pvt *pvt = (struct pvt *)this->private; struct nwent *rval; int r; if (init(this) == -1) return (NULL); do { if (pvt->needrewind) { nisfree(pvt, do_all); r = yp_first(pvt->nis_domain, networks_byaddr, &pvt->curkey_data, &pvt->curkey_len, &pvt->curval_data, &pvt->curval_len); pvt->needrewind = 0; } else { char *newkey_data; int newkey_len; nisfree(pvt, do_val); r = yp_next(pvt->nis_domain, networks_byaddr, pvt->curkey_data, pvt->curkey_len, &newkey_data, &newkey_len, &pvt->curval_data, &pvt->curval_len); nisfree(pvt, do_key); pvt->curkey_data = newkey_data; pvt->curkey_len = newkey_len; } if (r != 0) { RES_SET_H_ERRNO(pvt->res, HOST_NOT_FOUND); return (NULL); } rval = makenwent(this); } while (rval == NULL); return (rval); } static void nw_minimize(struct irs_nw *this) { struct pvt *pvt = (struct pvt *)this->private; if (pvt->res) res_nclose(pvt->res); } static struct __res_state * nw_res_get(struct irs_nw *this) { struct pvt *pvt = (struct pvt *)this->private; if (!pvt->res) { struct __res_state *res; res = (struct __res_state *)malloc(sizeof *res); if (!res) { errno = ENOMEM; return (NULL); } memset(res, 0, sizeof *res); nw_res_set(this, res, free); } return (pvt->res); } static void nw_res_set(struct irs_nw *this, struct __res_state *res, void (*free_res)(void *)) { struct pvt *pvt = (struct pvt *)this->private; if (pvt->res && pvt->free_res) { res_nclose(pvt->res); (*pvt->free_res)(pvt->res); } pvt->res = res; pvt->free_res = free_res; } /* Private */ static struct nwent * makenwent(struct irs_nw *this) { struct pvt *pvt = (struct pvt *)this->private; static const char spaces[] = " \t"; char *t, *cp, **ap; if (pvt->nwbuf) free(pvt->nwbuf); pvt->nwbuf = pvt->curval_data; pvt->curval_data = NULL; if ((cp = strpbrk(pvt->nwbuf, "#\n")) != NULL) *cp = '\0'; cp = pvt->nwbuf; /* Name */ pvt->nwent.n_name = cp; cp += strcspn(cp, spaces); if (!*cp) goto cleanup; *cp++ = '\0'; cp += strspn(cp, spaces); /* Network */ pvt->nwent.n_addrtype = AF_INET; t = cp + strcspn(cp, spaces); if (*t) *t++ = '\0'; pvt->nwent.n_length = inet_net_pton(AF_INET, cp, pvt->addr, sizeof pvt->addr); if (pvt->nwent.n_length < 0) goto cleanup; pvt->nwent.n_addr = pvt->addr; cp = t; /* Aliases */ ap = pvt->nwent.n_aliases = pvt->aliases; while (*cp) { if (ap >= &pvt->aliases[MAXALIASES]) break; *ap++ = cp; cp += strcspn(cp, spaces); if (!*cp) break; *cp++ = '\0'; cp += strspn(cp, spaces); } *ap = NULL; return (&pvt->nwent); cleanup: if (pvt->nwbuf) { free(pvt->nwbuf); pvt->nwbuf = NULL; } return (NULL); } static void nisfree(struct pvt *pvt, enum do_what do_what) { if ((do_what & do_key) && pvt->curkey_data) { free(pvt->curkey_data); pvt->curkey_data = NULL; } if ((do_what & do_val) && pvt->curval_data) { free(pvt->curval_data); pvt->curval_data = NULL; } } static int init(struct irs_nw *this) { struct pvt *pvt = (struct pvt *)this->private; if (!pvt->res && !nw_res_get(this)) return (-1); if (((pvt->res->options & RES_INIT) == 0) && res_ninit(pvt->res) == -1) return (-1); return (0); } #endif /*WANT_IRS_NIS*/ /*! \file */