diff options
Diffstat (limited to 'src/nss-resolve/nss-resolve.c')
| -rw-r--r-- | src/nss-resolve/nss-resolve.c | 99 |
1 files changed, 58 insertions, 41 deletions
diff --git a/src/nss-resolve/nss-resolve.c b/src/nss-resolve/nss-resolve.c index 7b0c24fbea..0dbc224b5c 100644 --- a/src/nss-resolve/nss-resolve.c +++ b/src/nss-resolve/nss-resolve.c @@ -43,12 +43,15 @@ NSS_GETHOSTBYADDR_PROTOTYPES(resolve); #define DNS_CALL_TIMEOUT_USEC (45*USEC_PER_SEC) -static int count_addresses(sd_bus_message *m, unsigned af, unsigned *ret) { - unsigned c = 0; - int r; +static int count_addresses(sd_bus_message *m, unsigned af, const char **canonical) { + int c = 0, r; assert(m); - assert(ret); + assert(canonical); + + r = sd_bus_message_enter_container(m, 'a', "(yayi)"); + if (r < 0) + return r; while ((r = sd_bus_message_enter_container(m, 'r', "yayi")) > 0) { unsigned char family; @@ -73,12 +76,19 @@ static int count_addresses(sd_bus_message *m, unsigned af, unsigned *ret) { if (r < 0) return r; - r = sd_bus_message_rewind(m, false); + r = sd_bus_message_exit_container(m); + if (r < 0) + return r; + + r = sd_bus_message_read(m, "s", canonical); if (r < 0) return r; - *ret = c; - return 0; + r = sd_bus_message_rewind(m, true); + if (r < 0) + return r; + + return c; } enum nss_status _nss_resolve_gethostbyname4_r( @@ -92,10 +102,10 @@ enum nss_status _nss_resolve_gethostbyname4_r( _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; struct gaih_addrtuple *r_tuple, *r_tuple_first = NULL; _cleanup_bus_unref_ sd_bus *bus = NULL; + const char *canonical = NULL; size_t l, ms, idx; char *r_name; - unsigned i = 0, c = 0; - int r; + int c, r, i = 0; assert(name); assert(pat); @@ -138,21 +148,21 @@ enum nss_status _nss_resolve_gethostbyname4_r( return NSS_STATUS_UNAVAIL; } - r = sd_bus_message_enter_container(reply, 'a', "(yayi)"); - if (r < 0) - goto fail; - - r = count_addresses(reply, AF_UNSPEC, &c); - if (r < 0) + c = count_addresses(reply, AF_UNSPEC, &canonical); + if (c < 0) { + r = c; goto fail; - - if (c <= 0) { + } + if (c == 0) { *errnop = ESRCH; *h_errnop = HOST_NOT_FOUND; return NSS_STATUS_NOTFOUND; } - l = strlen(name); + if (isempty(canonical)) + canonical = name; + + l = strlen(canonical); ms = ALIGN(l+1) + ALIGN(sizeof(struct gaih_addrtuple)) * c; if (buflen < ms) { *errnop = ENOMEM; @@ -162,11 +172,16 @@ enum nss_status _nss_resolve_gethostbyname4_r( /* First, append name */ r_name = buffer; - memcpy(r_name, name, l+1); + memcpy(r_name, canonical, l+1); idx = ALIGN(l+1); /* Second, append addresses */ r_tuple_first = (struct gaih_addrtuple*) (buffer + idx); + + r = sd_bus_message_enter_container(reply, 'a', "(yayi)"); + if (r < 0) + goto fail; + while ((r = sd_bus_message_enter_container(reply, 'r', "yayi")) > 0) { unsigned char family; const void *a; @@ -212,13 +227,10 @@ enum nss_status _nss_resolve_gethostbyname4_r( idx += ALIGN(sizeof(struct gaih_addrtuple)); i++; } - - assert(i == c); - - r = sd_bus_message_exit_container(reply); if (r < 0) goto fail; + assert(i == c); assert(idx == ms); if (*pat) @@ -250,9 +262,9 @@ enum nss_status _nss_resolve_gethostbyname3_r( _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; char *r_name, *r_aliases, *r_addr, *r_addr_list; _cleanup_bus_unref_ sd_bus *bus = NULL; - unsigned c = 0, i = 0; size_t l, idx, ms, alen; - int r; + const char *canonical; + int c, r, i = 0; assert(name); assert(result); @@ -303,22 +315,22 @@ enum nss_status _nss_resolve_gethostbyname3_r( return NSS_STATUS_UNAVAIL; } - r = sd_bus_message_enter_container(reply, 'a', "(yayi)"); - if (r < 0) + c = count_addresses(reply, af, &canonical); + if (c < 0) { + r = c; goto fail; - - r = count_addresses(reply, af, &c); - if (r < 0) - goto fail; - - if (c <= 0) { + } + if (c == 0) { *errnop = ESRCH; *h_errnop = HOST_NOT_FOUND; return NSS_STATUS_NOTFOUND; } + if (isempty(canonical)) + canonical = name; + alen = PROTO_ADDRESS_SIZE(af); - l = strlen(name); + l = strlen(canonical); ms = ALIGN(l+1) + sizeof(char*) + @@ -333,16 +345,21 @@ enum nss_status _nss_resolve_gethostbyname3_r( /* First, append name */ r_name = buffer; - memcpy(r_name, name, l+1); + memcpy(r_name, canonical, l+1); idx = ALIGN(l+1); - /* Second, create aliases array */ + /* Second, create empty aliases array */ r_aliases = buffer + idx; ((char**) r_aliases)[0] = NULL; idx += sizeof(char*); /* Third, append addresses */ r_addr = buffer + idx; + + r = sd_bus_message_enter_container(reply, 'a', "(yayi)"); + if (r < 0) + goto fail; + while ((r = sd_bus_message_enter_container(reply, 'r', "yayi")) > 0) { unsigned char family; const void *a; @@ -381,15 +398,13 @@ enum nss_status _nss_resolve_gethostbyname3_r( memcpy(r_addr + i*ALIGN(alen), a, alen); i++; } + if (r < 0) + goto fail; assert(i == c); idx += c * ALIGN(alen); - r = sd_bus_message_exit_container(reply); - if (r < 0) - goto fail; - - /* Third, append address pointer array */ + /* Fourth, append address pointer array */ r_addr_list = buffer + idx; for (i = 0; i < c; i++) ((char**) r_addr_list)[i] = r_addr + i*ALIGN(alen); @@ -560,6 +575,8 @@ enum nss_status _nss_resolve_gethostbyaddr2_r( idx += ALIGN(l+1); } + if (r < 0) + goto fail; ((char**) r_aliases)[c-1] = NULL; assert(idx == ms); |