1f51d3e87671110c508f0f71d9bcb1bf54c22ca3bElliott Hughes/* $OpenBSD: inet_ntop.c,v 1.10 2014/05/17 18:16:14 tedu Exp $ */ 21dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 36a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes/* Copyright (c) 1996 by Internet Software Consortium. 41dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 51dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Permission to use, copy, modify, and distribute this software for any 61dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * purpose with or without fee is hereby granted, provided that the above 71dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * copyright notice and this permission notice appear in all copies. 81dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 96a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS 106a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES 116a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE 126a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 136a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 146a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 156a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 166a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes * SOFTWARE. 171dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <sys/param.h> 201dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <sys/types.h> 211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <sys/socket.h> 221dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <netinet/in.h> 231dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <arpa/inet.h> 24e8bcca3a2ca4a70156c72239d62bb68eeb2929fdElliott Hughes#include <arpa/nameser.h> 256a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes#include <string.h> 261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <errno.h> 271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <stdio.h> 28e8bcca3a2ca4a70156c72239d62bb68eeb2929fdElliott Hughes 296a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes/* 301dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * WARNING: Don't even consider trying to compile this on a system where 311dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * sizeof(int) < 4. sizeof(int) > 4 is fine; all the world's not a VAX. 321dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 331dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 346a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughesstatic const char *inet_ntop4(const u_char *src, char *dst, size_t size); 356a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughesstatic const char *inet_ntop6(const u_char *src, char *dst, size_t size); 361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 376a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes/* const char * 381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * inet_ntop(af, src, dst, size) 391dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * convert a network format address to presentation format. 401dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * return: 411dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * pointer to presentation format address (`dst'), or NULL (see errno). 421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * author: 431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Paul Vixie, 1996. 441dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectconst char * 46e8bcca3a2ca4a70156c72239d62bb68eeb2929fdElliott Hughesinet_ntop(int af, const void *src, char *dst, socklen_t size) 471dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 481dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project switch (af) { 491dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project case AF_INET: 506a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes return (inet_ntop4(src, dst, (size_t)size)); 511dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project case AF_INET6: 526a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes return (inet_ntop6(src, dst, (size_t)size)); 531dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project default: 541dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project errno = EAFNOSUPPORT; 551dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (NULL); 561dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 571dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* NOTREACHED */ 581dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 591dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 601dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* const char * 611dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * inet_ntop4(src, dst, size) 621dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * format an IPv4 address, more or less like inet_ntoa() 631dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * return: 641dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * `dst' (as a const) 651dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notes: 661dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * (1) uses no statics 671dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * (2) takes a u_char* not an in_addr as input 681dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * author: 691dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Paul Vixie, 1996. 701dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 711dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectstatic const char * 726a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughesinet_ntop4(const u_char *src, char *dst, size_t size) 731dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 741dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project char tmp[sizeof "255.255.255.255"]; 751dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int l; 761dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 77f51d3e87671110c508f0f71d9bcb1bf54c22ca3bElliott Hughes l = snprintf(tmp, sizeof(tmp), "%u.%u.%u.%u", 78f51d3e87671110c508f0f71d9bcb1bf54c22ca3bElliott Hughes src[0], src[1], src[2], src[3]); 796a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes if (l <= 0 || l >= size) { 801dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project errno = ENOSPC; 811dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (NULL); 821dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 831dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project strlcpy(dst, tmp, size); 841dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (dst); 851dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 861dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 871dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* const char * 881dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * inet_ntop6(src, dst, size) 891dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * convert IPv6 binary address into presentation (printable) format 901dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * author: 911dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Paul Vixie, 1996. 921dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 931dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectstatic const char * 946a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughesinet_ntop6(const u_char *src, char *dst, size_t size) 951dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 961dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* 971dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Note that int32_t and int16_t need only be "at least" large enough 981dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * to contain a value of the specified size. On some systems, like 991dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Crays, there is no such thing as an integer variable with 16 bits. 1001dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Keep this in mind if you think this function should have been coded 1011dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * to use pointer overlays. All the world's not a VAX. 1021dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 1031dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project char tmp[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255"]; 1041dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project char *tp, *ep; 1051dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project struct { int base, len; } best, cur; 1066a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes u_int words[IN6ADDRSZ / INT16SZ]; 1071dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int i; 1081dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int advance; 1091dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 1101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* 1111dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Preprocess: 1121dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Copy the input (bytewise) array into a wordwise array. 1131dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Find the longest run of 0x00's in src[] for :: shorthanding. 1141dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 1151dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project memset(words, '\0', sizeof words); 1166a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes for (i = 0; i < IN6ADDRSZ; i++) 1171dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project words[i / 2] |= (src[i] << ((1 - (i % 2)) << 3)); 1181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project best.base = -1; 1191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cur.base = -1; 1206a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes for (i = 0; i < (IN6ADDRSZ / INT16SZ); i++) { 1211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (words[i] == 0) { 1221dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (cur.base == -1) 1231dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cur.base = i, cur.len = 1; 1241dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project else 1251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cur.len++; 1261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } else { 1271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (cur.base != -1) { 1281dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (best.base == -1 || cur.len > best.len) 1291dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project best = cur; 1301dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cur.base = -1; 1311dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 1321dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 1331dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 1341dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (cur.base != -1) { 1351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (best.base == -1 || cur.len > best.len) 1361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project best = cur; 1371dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 1381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (best.base != -1 && best.len < 2) 1391dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project best.base = -1; 1401dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 1411dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* 1421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Format the result. 1431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 1441dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project tp = tmp; 1451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project ep = tmp + sizeof(tmp); 1466a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes for (i = 0; i < (IN6ADDRSZ / INT16SZ) && tp < ep; i++) { 1471dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* Are we inside the best run of 0x00's? */ 1481dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (best.base != -1 && i >= best.base && 1491dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project i < (best.base + best.len)) { 1506a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes if (i == best.base) { 1516a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes if (tp + 1 >= ep) { 1526a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes errno = ENOSPC; 1536a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes return (NULL); 1546a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes } 1551dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project *tp++ = ':'; 1566a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes } 1571dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project continue; 1581dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 1591dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* Are we following an initial run of 0x00s or any real hex? */ 1601dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (i != 0) { 1616a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes if (tp + 1 >= ep) { 1626a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes errno = ENOSPC; 1631dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (NULL); 1646a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes } 1651dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project *tp++ = ':'; 1661dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 1671dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* Is this address an encapsulated IPv4? */ 1681dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (i == 6 && best.base == 0 && 1696a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes (best.len == 6 || (best.len == 5 && words[5] == 0xffff))) { 1706a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes if (!inet_ntop4(src+12, tp, (size_t)(ep - tp))) 1711dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (NULL); 1721dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project tp += strlen(tp); 1731dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 1741dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 1756a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes advance = snprintf(tp, ep - tp, "%x", words[i]); 1766a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes if (advance <= 0 || advance >= ep - tp) { 1776a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes errno = ENOSPC; 1781dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (NULL); 1796a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes } 1801dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project tp += advance; 1811dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 1821dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* Was it a trailing run of 0x00's? */ 1836a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes if (best.base != -1 && (best.base + best.len) == (IN6ADDRSZ / INT16SZ)) { 1846a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes if (tp + 1 >= ep) { 1856a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes errno = ENOSPC; 1861dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (NULL); 1876a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes } 1881dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project *tp++ = ':'; 1891dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 1906a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes if (tp + 1 >= ep) { 1916a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes errno = ENOSPC; 1921dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (NULL); 1936a41b0fb0e589c4afc4ecbcf7c425f0aa40eaea4Elliott Hughes } 1941dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project *tp++ = '\0'; 1951dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 1961dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* 1971dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Check for overflow, copy, and we're done. 1981dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 1991dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if ((size_t)(tp - tmp) > size) { 2001dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project errno = ENOSPC; 2011dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (NULL); 2021dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 2031dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project strlcpy(dst, tmp, size); 2041dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (dst); 2051dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 206