From 59fb716afdbb0e114cc13810ec23e0db67de171e Mon Sep 17 00:00:00 2001 From: Andy Wingo Date: Sun, 19 Apr 2015 13:28:46 +0200 Subject: [PATCH] Remove src/nss-myhostname --- src/nss-myhostname/Makefile | 1 - src/nss-myhostname/nss-myhostname.c | 516 -------------------------- src/nss-myhostname/nss-myhostname.sym | 19 - 3 files changed, 536 deletions(-) delete mode 120000 src/nss-myhostname/Makefile delete mode 100644 src/nss-myhostname/nss-myhostname.c delete mode 100644 src/nss-myhostname/nss-myhostname.sym diff --git a/src/nss-myhostname/Makefile b/src/nss-myhostname/Makefile deleted file mode 120000 index d0b0e8e00..000000000 --- a/src/nss-myhostname/Makefile +++ /dev/null @@ -1 +0,0 @@ -../Makefile \ No newline at end of file diff --git a/src/nss-myhostname/nss-myhostname.c b/src/nss-myhostname/nss-myhostname.c deleted file mode 100644 index fed76c62e..000000000 --- a/src/nss-myhostname/nss-myhostname.c +++ /dev/null @@ -1,516 +0,0 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - -/*** - This file is part of systemd. - - Copyright 2008-2011 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see . -***/ - -#include -#include -#include -#include -#include -#include - -#include "local-addresses.h" -#include "macro.h" -#include "nss-util.h" -#include "util.h" - -/* We use 127.0.0.2 as IPv4 address. This has the advantage over - * 127.0.0.1 that it can be translated back to the local hostname. For - * IPv6 we use ::1 which unfortunately will not translate back to the - * hostname but instead something like "localhost" or so. */ - -#define LOCALADDRESS_IPV4 (htonl(0x7F000002)) -#define LOCALADDRESS_IPV6 &in6addr_loopback -#define LOOPBACK_INTERFACE "lo" - -NSS_GETHOSTBYNAME_PROTOTYPES(myhostname); -NSS_GETHOSTBYADDR_PROTOTYPES(myhostname); - -static bool is_gateway(const char *hostname) { - assert(hostname); - - return streq(hostname, "gateway") || - streq(hostname, "gateway."); -} - -enum nss_status _nss_myhostname_gethostbyname4_r( - const char *name, - struct gaih_addrtuple **pat, - char *buffer, size_t buflen, - int *errnop, int *h_errnop, - int32_t *ttlp) { - - struct gaih_addrtuple *r_tuple, *r_tuple_prev = NULL; - _cleanup_free_ struct local_address *addresses = NULL; - _cleanup_free_ char *hn = NULL; - const char *canonical = NULL; - int n_addresses = 0, lo_ifi; - uint32_t local_address_ipv4; - struct local_address *a; - size_t l, idx, ms; - char *r_name; - unsigned n; - - assert(name); - assert(pat); - assert(buffer); - assert(errnop); - assert(h_errnop); - - if (is_localhost(name)) { - /* We respond to 'localhost', so that /etc/hosts - * is optional */ - - canonical = "localhost"; - local_address_ipv4 = htonl(INADDR_LOOPBACK); - - } else if (is_gateway(name)) { - - n_addresses = local_gateways(NULL, 0, AF_UNSPEC, &addresses); - if (n_addresses <= 0) { - *errnop = ENOENT; - *h_errnop = HOST_NOT_FOUND; - return NSS_STATUS_NOTFOUND; - } - - canonical = "gateway"; - - } else { - hn = gethostname_malloc(); - if (!hn) { - *errnop = ENOMEM; - *h_errnop = NO_RECOVERY; - return NSS_STATUS_TRYAGAIN; - } - - /* We respond to our local host name, our our hostname suffixed with a single dot. */ - if (!streq(name, hn) && !streq_ptr(startswith(name, hn), ".")) { - *errnop = ENOENT; - *h_errnop = HOST_NOT_FOUND; - return NSS_STATUS_NOTFOUND; - } - - n_addresses = local_addresses(NULL, 0, AF_UNSPEC, &addresses); - if (n_addresses < 0) - n_addresses = 0; - - canonical = hn; - local_address_ipv4 = LOCALADDRESS_IPV4; - } - - /* If this call fails we fill in 0 as scope. Which is fine */ - lo_ifi = n_addresses <= 0 ? if_nametoindex(LOOPBACK_INTERFACE) : 0; - - l = strlen(canonical); - ms = ALIGN(l+1) + ALIGN(sizeof(struct gaih_addrtuple)) * (n_addresses > 0 ? n_addresses : 2); - if (buflen < ms) { - *errnop = ENOMEM; - *h_errnop = NO_RECOVERY; - return NSS_STATUS_TRYAGAIN; - } - - /* First, fill in hostname */ - r_name = buffer; - memcpy(r_name, canonical, l+1); - idx = ALIGN(l+1); - - if (n_addresses <= 0) { - /* Second, fill in IPv6 tuple */ - r_tuple = (struct gaih_addrtuple*) (buffer + idx); - r_tuple->next = r_tuple_prev; - r_tuple->name = r_name; - r_tuple->family = AF_INET6; - memcpy(r_tuple->addr, LOCALADDRESS_IPV6, 16); - r_tuple->scopeid = (uint32_t) lo_ifi; - - idx += ALIGN(sizeof(struct gaih_addrtuple)); - r_tuple_prev = r_tuple; - - /* Third, fill in IPv4 tuple */ - r_tuple = (struct gaih_addrtuple*) (buffer + idx); - r_tuple->next = r_tuple_prev; - r_tuple->name = r_name; - r_tuple->family = AF_INET; - *(uint32_t*) r_tuple->addr = local_address_ipv4; - r_tuple->scopeid = (uint32_t) lo_ifi; - - idx += ALIGN(sizeof(struct gaih_addrtuple)); - r_tuple_prev = r_tuple; - } - - /* Fourth, fill actual addresses in, but in backwards order */ - for (a = addresses + n_addresses - 1, n = 0; (int) n < n_addresses; n++, a--) { - r_tuple = (struct gaih_addrtuple*) (buffer + idx); - r_tuple->next = r_tuple_prev; - r_tuple->name = r_name; - r_tuple->family = a->family; - r_tuple->scopeid = a->ifindex; - memcpy(r_tuple->addr, &a->address, 16); - - idx += ALIGN(sizeof(struct gaih_addrtuple)); - r_tuple_prev = r_tuple; - } - - /* Verify the size matches */ - assert(idx == ms); - - /* Nscd expects us to store the first record in **pat. */ - if (*pat) - **pat = *r_tuple_prev; - else - *pat = r_tuple_prev; - - if (ttlp) - *ttlp = 0; - - /* Explicitly reset all error variables */ - *errnop = 0; - *h_errnop = NETDB_SUCCESS; - h_errno = 0; - - return NSS_STATUS_SUCCESS; -} - -static enum nss_status fill_in_hostent( - const char *canonical, const char *additional, - int af, - struct local_address *addresses, unsigned n_addresses, - uint32_t local_address_ipv4, - struct hostent *result, - char *buffer, size_t buflen, - int *errnop, int *h_errnop, - int32_t *ttlp, - char **canonp) { - - size_t l_canonical, l_additional, idx, ms, alen; - char *r_addr, *r_name, *r_aliases, *r_alias = NULL, *r_addr_list; - struct local_address *a; - unsigned n, c; - - assert(canonical); - assert(result); - assert(buffer); - assert(errnop); - assert(h_errnop); - - alen = FAMILY_ADDRESS_SIZE(af); - - for (a = addresses, n = 0, c = 0; n < n_addresses; a++, n++) - if (af == a->family) - c++; - - l_canonical = strlen(canonical); - l_additional = additional ? strlen(additional) : 0; - ms = ALIGN(l_canonical+1)+ - (additional ? ALIGN(l_additional+1) : 0) + - sizeof(char*) + - (additional ? sizeof(char*) : 0) + - (c > 0 ? c : 1) * ALIGN(alen) + - (c > 0 ? c+1 : 2) * sizeof(char*); - - if (buflen < ms) { - *errnop = ENOMEM; - *h_errnop = NO_RECOVERY; - return NSS_STATUS_TRYAGAIN; - } - - /* First, fill in hostnames */ - r_name = buffer; - memcpy(r_name, canonical, l_canonical+1); - idx = ALIGN(l_canonical+1); - - if (additional) { - r_alias = buffer + idx; - memcpy(r_alias, additional, l_additional+1); - idx += ALIGN(l_additional+1); - } - - /* Second, create aliases array */ - r_aliases = buffer + idx; - if (additional) { - ((char**) r_aliases)[0] = r_alias; - ((char**) r_aliases)[1] = NULL; - idx += 2*sizeof(char*); - } else { - ((char**) r_aliases)[0] = NULL; - idx += sizeof(char*); - } - - /* Third, add addresses */ - r_addr = buffer + idx; - if (c > 0) { - unsigned i = 0; - - for (a = addresses, n = 0; n < n_addresses; a++, n++) { - if (af != a->family) - continue; - - memcpy(r_addr + i*ALIGN(alen), &a->address, alen); - i++; - } - - assert(i == c); - idx += c*ALIGN(alen); - } else { - if (af == AF_INET) - *(uint32_t*) r_addr = local_address_ipv4; - else - memcpy(r_addr, LOCALADDRESS_IPV6, 16); - - idx += ALIGN(alen); - } - - /* Fourth, add address pointer array */ - r_addr_list = buffer + idx; - if (c > 0) { - unsigned i; - - for (i = 0; i < c; i++) - ((char**) r_addr_list)[i] = r_addr + i*ALIGN(alen); - - ((char**) r_addr_list)[i] = NULL; - idx += (c+1) * sizeof(char*); - - } else { - ((char**) r_addr_list)[0] = r_addr; - ((char**) r_addr_list)[1] = NULL; - idx += 2 * sizeof(char*); - } - - /* Verify the size matches */ - assert(idx == ms); - - result->h_name = r_name; - result->h_aliases = (char**) r_aliases; - result->h_addrtype = af; - result->h_length = alen; - result->h_addr_list = (char**) r_addr_list; - - if (ttlp) - *ttlp = 0; - - if (canonp) - *canonp = r_name; - - /* Explicitly reset all error variables */ - *errnop = 0; - *h_errnop = NETDB_SUCCESS; - h_errno = 0; - - return NSS_STATUS_SUCCESS; -} - -enum nss_status _nss_myhostname_gethostbyname3_r( - const char *name, - int af, - struct hostent *host, - char *buffer, size_t buflen, - int *errnop, int *h_errnop, - int32_t *ttlp, - char **canonp) { - - _cleanup_free_ struct local_address *addresses = NULL; - const char *canonical, *additional = NULL; - _cleanup_free_ char *hn = NULL; - uint32_t local_address_ipv4 = 0; - int n_addresses = 0; - - assert(name); - assert(host); - assert(buffer); - assert(errnop); - assert(h_errnop); - - if (af == AF_UNSPEC) - af = AF_INET; - - if (af != AF_INET && af != AF_INET6) { - *errnop = EAFNOSUPPORT; - *h_errnop = NO_DATA; - return NSS_STATUS_UNAVAIL; - } - - if (is_localhost(name)) { - canonical = "localhost"; - local_address_ipv4 = htonl(INADDR_LOOPBACK); - - } else if (is_gateway(name)) { - - n_addresses = local_gateways(NULL, 0, af, &addresses); - if (n_addresses <= 0) { - *errnop = ENOENT; - *h_errnop = HOST_NOT_FOUND; - return NSS_STATUS_NOTFOUND; - } - - canonical = "gateway"; - - } else { - hn = gethostname_malloc(); - if (!hn) { - *errnop = ENOMEM; - *h_errnop = NO_RECOVERY; - return NSS_STATUS_TRYAGAIN; - } - - if (!streq(name, hn) && !streq_ptr(startswith(name, hn), ".")) { - *errnop = ENOENT; - *h_errnop = HOST_NOT_FOUND; - return NSS_STATUS_NOTFOUND; - } - - n_addresses = local_addresses(NULL, 0, af, &addresses); - if (n_addresses < 0) - n_addresses = 0; - - canonical = hn; - additional = n_addresses <= 0 && af == AF_INET6 ? "localhost" : NULL; - local_address_ipv4 = LOCALADDRESS_IPV4; - } - - return fill_in_hostent( - canonical, additional, - af, - addresses, n_addresses, - local_address_ipv4, - host, - buffer, buflen, - errnop, h_errnop, - ttlp, - canonp); -} - -enum nss_status _nss_myhostname_gethostbyaddr2_r( - const void* addr, socklen_t len, - int af, - struct hostent *host, - char *buffer, size_t buflen, - int *errnop, int *h_errnop, - int32_t *ttlp) { - - const char *canonical = NULL, *additional = NULL; - uint32_t local_address_ipv4 = LOCALADDRESS_IPV4; - _cleanup_free_ struct local_address *addresses = NULL; - _cleanup_free_ char *hn = NULL; - int n_addresses = 0; - struct local_address *a; - bool additional_from_hostname = false; - unsigned n; - - assert(addr); - assert(host); - assert(buffer); - assert(errnop); - assert(h_errnop); - - if (!IN_SET(af, AF_INET, AF_INET6)) { - *errnop = EAFNOSUPPORT; - *h_errnop = NO_DATA; - return NSS_STATUS_UNAVAIL; - } - - if (len != FAMILY_ADDRESS_SIZE(af)) { - *errnop = EINVAL; - *h_errnop = NO_RECOVERY; - return NSS_STATUS_UNAVAIL; - } - - if (af == AF_INET) { - if ((*(uint32_t*) addr) == LOCALADDRESS_IPV4) - goto found; - - if ((*(uint32_t*) addr) == htonl(INADDR_LOOPBACK)) { - canonical = "localhost"; - local_address_ipv4 = htonl(INADDR_LOOPBACK); - goto found; - } - - } else { - assert(af == AF_INET6); - - if (memcmp(addr, LOCALADDRESS_IPV6, 16) == 0) { - canonical = "localhost"; - additional_from_hostname = true; - goto found; - } - } - - n_addresses = local_addresses(NULL, 0, AF_UNSPEC, &addresses); - if (n_addresses > 0) { - for (a = addresses, n = 0; (int) n < n_addresses; n++, a++) { - if (af != a->family) - continue; - - if (memcmp(addr, &a->address, FAMILY_ADDRESS_SIZE(af)) == 0) - goto found; - } - } - - free(addresses); - addresses = NULL; - - n_addresses = local_gateways(NULL, 0, AF_UNSPEC, &addresses); - if (n_addresses > 0) { - for (a = addresses, n = 0; (int) n < n_addresses; n++, a++) { - if (af != a->family) - continue; - - if (memcmp(addr, &a->address, FAMILY_ADDRESS_SIZE(af)) == 0) { - canonical = "gateway"; - goto found; - } - } - } - - *errnop = ENOENT; - *h_errnop = HOST_NOT_FOUND; - - return NSS_STATUS_NOTFOUND; - -found: - if (!canonical || (!additional && additional_from_hostname)) { - hn = gethostname_malloc(); - if (!hn) { - *errnop = ENOMEM; - *h_errnop = NO_RECOVERY; - return NSS_STATUS_TRYAGAIN; - } - - if (!canonical) - canonical = hn; - - if (!additional && additional_from_hostname) - additional = hn; - } - - return fill_in_hostent( - canonical, additional, - af, - addresses, n_addresses, - local_address_ipv4, - host, - buffer, buflen, - errnop, h_errnop, - ttlp, - NULL); -} - -NSS_GETHOSTBYNAME_FALLBACKS(myhostname); -NSS_GETHOSTBYADDR_FALLBACKS(myhostname); diff --git a/src/nss-myhostname/nss-myhostname.sym b/src/nss-myhostname/nss-myhostname.sym deleted file mode 100644 index 78646c38b..000000000 --- a/src/nss-myhostname/nss-myhostname.sym +++ /dev/null @@ -1,19 +0,0 @@ -/*** - This file is part of systemd. - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. -***/ - -{ -global: - _nss_myhostname_gethostbyname_r; - _nss_myhostname_gethostbyname2_r; - _nss_myhostname_gethostbyname3_r; - _nss_myhostname_gethostbyname4_r; - _nss_myhostname_gethostbyaddr_r; - _nss_myhostname_gethostbyaddr2_r; -local: *; -}; -- 2.30.2