diff options
Diffstat (limited to 'src/lib/ares_getnameinfo.c')
| -rw-r--r-- | src/lib/ares_getnameinfo.c | 640 |
1 files changed, 314 insertions, 326 deletions
diff --git a/src/lib/ares_getnameinfo.c b/src/lib/ares_getnameinfo.c index 966919a..b9de85e 100644 --- a/src/lib/ares_getnameinfo.c +++ b/src/lib/ares_getnameinfo.c @@ -1,23 +1,33 @@ - -/* Copyright 2005 by Dominick Meglio +/* MIT License + * + * Copyright (c) 2005, 2013 Dominick Meglio + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. * - * Permission to use, copy, modify, and distribute this - * software and its documentation for any purpose and without - * fee is hereby granted, provided that the above copyright - * notice appear in all copies and that both that copyright - * notice and this permission notice appear in supporting - * documentation, and that the name of M.I.T. not be used in - * advertising or publicity pertaining to distribution of the - * software without specific, written prior permission. - * M.I.T. makes no representations about the suitability of - * this software for any purpose. It is provided "as is" - * without express or implied warranty. + * SPDX-License-Identifier: MIT */ #include "ares_setup.h" #ifdef HAVE_GETSERVBYPORT_R -# if !defined(GETSERVBYPORT_R_ARGS) || \ - (GETSERVBYPORT_R_ARGS < 4) || (GETSERVBYPORT_R_ARGS > 6) +# if !defined(GETSERVBYPORT_R_ARGS) || (GETSERVBYPORT_R_ARGS < 4) || \ + (GETSERVBYPORT_R_ARGS > 6) # error "you MUST specifiy a valid number of arguments for getservbyport_r" # endif #endif @@ -35,413 +45,391 @@ #include "ares_nameser.h" #ifdef HAVE_NET_IF_H -#include <net/if.h> +# include <net/if.h> #endif #include "ares.h" #include "ares_ipv6.h" -#include "ares_nowarn.h" #include "ares_private.h" struct nameinfo_query { ares_nameinfo_callback callback; - void *arg; + void *arg; + union { - struct sockaddr_in addr4; + struct sockaddr_in addr4; struct sockaddr_in6 addr6; } addr; - int family; - int flags; - int timeouts; + + int family; + unsigned int flags; + size_t timeouts; }; #ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID -#define IPBUFSIZ \ - (sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255") + IF_NAMESIZE) +# define IPBUFSIZ \ + (sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255") + IF_NAMESIZE) #else -#define IPBUFSIZ \ - (sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255")) +# define IPBUFSIZ (sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255")) #endif -static void nameinfo_callback(void *arg, int status, int timeouts, - struct hostent *host); -static char *lookup_service(unsigned short port, int flags, - char *buf, size_t buflen); +static void nameinfo_callback(void *arg, int status, int timeouts, + struct hostent *host); +static char *lookup_service(unsigned short port, unsigned int flags, char *buf, + size_t buflen); #ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID -static void append_scopeid(struct sockaddr_in6 *addr6, unsigned int scopeid, - char *buf, size_t buflen); +static void append_scopeid(const struct sockaddr_in6 *addr6, + unsigned int scopeid, char *buf, size_t buflen); #endif STATIC_TESTABLE char *ares_striendstr(const char *s1, const char *s2); void ares_getnameinfo(ares_channel channel, const struct sockaddr *sa, - ares_socklen_t salen, - int flags, ares_nameinfo_callback callback, void *arg) + ares_socklen_t salen, int flags_int, + ares_nameinfo_callback callback, void *arg) { - struct sockaddr_in *addr = NULL; - struct sockaddr_in6 *addr6 = NULL; - struct nameinfo_query *niquery; - unsigned int port = 0; + const struct sockaddr_in *addr = NULL; + struct sockaddr_in6 *addr6 = NULL; + struct nameinfo_query *niquery; + unsigned short port = 0; + unsigned int flags = (unsigned int)flags_int; /* Validate socket address family and length */ - if ((sa->sa_family == AF_INET) && - (salen == sizeof(struct sockaddr_in))) - { - addr = CARES_INADDR_CAST(struct sockaddr_in *, sa); - port = addr->sin_port; - } - else if ((sa->sa_family == AF_INET6) && - (salen == sizeof(struct sockaddr_in6))) - { - addr6 = CARES_INADDR_CAST(struct sockaddr_in6 *, sa); - port = addr6->sin6_port; - } - else - { - callback(arg, ARES_ENOTIMP, 0, NULL, NULL); - return; - } + if ((sa->sa_family == AF_INET) && (salen == sizeof(struct sockaddr_in))) { + addr = CARES_INADDR_CAST(struct sockaddr_in *, sa); + port = addr->sin_port; + } else if ((sa->sa_family == AF_INET6) && + (salen == sizeof(struct sockaddr_in6))) { + addr6 = CARES_INADDR_CAST(struct sockaddr_in6 *, sa); + port = addr6->sin6_port; + } else { + callback(arg, ARES_ENOTIMP, 0, NULL, NULL); + return; + } /* If neither, assume they want a host */ - if (!(flags & ARES_NI_LOOKUPSERVICE) && !(flags & ARES_NI_LOOKUPHOST)) + if (!(flags & ARES_NI_LOOKUPSERVICE) && !(flags & ARES_NI_LOOKUPHOST)) { flags |= ARES_NI_LOOKUPHOST; + } /* All they want is a service, no need for DNS */ - if ((flags & ARES_NI_LOOKUPSERVICE) && !(flags & ARES_NI_LOOKUPHOST)) - { - char buf[33], *service; + if ((flags & ARES_NI_LOOKUPSERVICE) && !(flags & ARES_NI_LOOKUPHOST)) { + char buf[33]; + char *service; - service = lookup_service((unsigned short)(port & 0xffff), - flags, buf, sizeof(buf)); - callback(arg, ARES_SUCCESS, 0, NULL, service); - return; - } + service = + lookup_service((unsigned short)(port & 0xffff), flags, buf, sizeof(buf)); + callback(arg, ARES_SUCCESS, 0, NULL, service); + return; + } /* They want a host lookup */ - if ((flags & ARES_NI_LOOKUPHOST)) - { - /* A numeric host can be handled without DNS */ - if ((flags & ARES_NI_NUMERICHOST)) - { - char ipbuf[IPBUFSIZ]; - char srvbuf[33]; - char *service = NULL; - ipbuf[0] = 0; - - /* Specifying not to lookup a host, but then saying a host - * is required has to be illegal. - */ - if (flags & ARES_NI_NAMEREQD) - { - callback(arg, ARES_EBADFLAGS, 0, NULL, NULL); - return; - } - if (salen == sizeof(struct sockaddr_in6)) - { - ares_inet_ntop(AF_INET6, &addr6->sin6_addr, ipbuf, IPBUFSIZ); - /* If the system supports scope IDs, use it */ + if (flags & ARES_NI_LOOKUPHOST) { + /* A numeric host can be handled without DNS */ + if (flags & ARES_NI_NUMERICHOST) { + char ipbuf[IPBUFSIZ]; + char srvbuf[33]; + char *service = NULL; + ipbuf[0] = 0; + + /* Specifying not to lookup a host, but then saying a host + * is required has to be illegal. + */ + if (flags & ARES_NI_NAMEREQD) { + callback(arg, ARES_EBADFLAGS, 0, NULL, NULL); + return; + } + if (salen == sizeof(struct sockaddr_in6)) { + ares_inet_ntop(AF_INET6, &addr6->sin6_addr, ipbuf, IPBUFSIZ); + /* If the system supports scope IDs, use it */ #ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID - append_scopeid(addr6, flags, ipbuf, sizeof(ipbuf)); + append_scopeid(addr6, flags, ipbuf, sizeof(ipbuf)); #endif - } - else - { - ares_inet_ntop(AF_INET, &addr->sin_addr, ipbuf, IPBUFSIZ); - } - /* They also want a service */ - if (flags & ARES_NI_LOOKUPSERVICE) - service = lookup_service((unsigned short)(port & 0xffff), - flags, srvbuf, sizeof(srvbuf)); - callback(arg, ARES_SUCCESS, 0, ipbuf, service); - return; + } else { + ares_inet_ntop(AF_INET, &addr->sin_addr, ipbuf, IPBUFSIZ); + } + /* They also want a service */ + if (flags & ARES_NI_LOOKUPSERVICE) { + service = lookup_service((unsigned short)(port & 0xffff), flags, srvbuf, + sizeof(srvbuf)); } + callback(arg, ARES_SUCCESS, 0, ipbuf, service); + return; + } /* This is where a DNS lookup becomes necessary */ - else - { - niquery = ares_malloc(sizeof(struct nameinfo_query)); - if (!niquery) - { - callback(arg, ARES_ENOMEM, 0, NULL, NULL); - return; - } - niquery->callback = callback; - niquery->arg = arg; - niquery->flags = flags; - niquery->timeouts = 0; - if (sa->sa_family == AF_INET) - { - niquery->family = AF_INET; - memcpy(&niquery->addr.addr4, addr, sizeof(niquery->addr.addr4)); - ares_gethostbyaddr(channel, &addr->sin_addr, - sizeof(struct in_addr), AF_INET, - nameinfo_callback, niquery); - } - else - { - niquery->family = AF_INET6; - memcpy(&niquery->addr.addr6, addr6, sizeof(niquery->addr.addr6)); - ares_gethostbyaddr(channel, &addr6->sin6_addr, - sizeof(struct ares_in6_addr), AF_INET6, - nameinfo_callback, niquery); - } + else { + niquery = ares_malloc(sizeof(struct nameinfo_query)); + if (!niquery) { + callback(arg, ARES_ENOMEM, 0, NULL, NULL); + return; + } + niquery->callback = callback; + niquery->arg = arg; + niquery->flags = flags; + niquery->timeouts = 0; + if (sa->sa_family == AF_INET) { + niquery->family = AF_INET; + memcpy(&niquery->addr.addr4, addr, sizeof(niquery->addr.addr4)); + ares_gethostbyaddr(channel, &addr->sin_addr, sizeof(struct in_addr), + AF_INET, nameinfo_callback, niquery); + } else { + niquery->family = AF_INET6; + memcpy(&niquery->addr.addr6, addr6, sizeof(niquery->addr.addr6)); + ares_gethostbyaddr(channel, &addr6->sin6_addr, + sizeof(struct ares_in6_addr), AF_INET6, + nameinfo_callback, niquery); } } + } } static void nameinfo_callback(void *arg, int status, int timeouts, struct hostent *host) { - struct nameinfo_query *niquery = (struct nameinfo_query *) arg; - char srvbuf[33]; - char *service = NULL; - - niquery->timeouts += timeouts; - if (status == ARES_SUCCESS) - { - /* They want a service too */ - if (niquery->flags & ARES_NI_LOOKUPSERVICE) - { - if (niquery->family == AF_INET) - service = lookup_service(niquery->addr.addr4.sin_port, - niquery->flags, srvbuf, sizeof(srvbuf)); - else - service = lookup_service(niquery->addr.addr6.sin6_port, - niquery->flags, srvbuf, sizeof(srvbuf)); - } - /* NOFQDN means we have to strip off the domain name portion. We do - this by determining our own domain name, then searching the string - for this domain name and removing it. - */ + struct nameinfo_query *niquery = (struct nameinfo_query *)arg; + char srvbuf[33]; + char *service = NULL; + + niquery->timeouts += (size_t)timeouts; + if (status == ARES_SUCCESS) { + /* They want a service too */ + if (niquery->flags & ARES_NI_LOOKUPSERVICE) { + if (niquery->family == AF_INET) { + service = lookup_service(niquery->addr.addr4.sin_port, niquery->flags, + srvbuf, sizeof(srvbuf)); + } else { + service = lookup_service(niquery->addr.addr6.sin6_port, niquery->flags, + srvbuf, sizeof(srvbuf)); + } + } + /* NOFQDN means we have to strip off the domain name portion. We do + this by determining our own domain name, then searching the string + for this domain name and removing it. + */ #ifdef HAVE_GETHOSTNAME - if (niquery->flags & ARES_NI_NOFQDN) - { - char buf[255]; - char *domain; - gethostname(buf, 255); - if ((domain = strchr(buf, '.')) != NULL) - { - char *end = ares_striendstr(host->h_name, domain); - if (end) - *end = 0; - } + if (niquery->flags & ARES_NI_NOFQDN) { + char buf[255]; + const char *domain; + gethostname(buf, 255); + if ((domain = strchr(buf, '.')) != NULL) { + char *end = ares_striendstr(host->h_name, domain); + if (end) { + *end = 0; } -#endif - niquery->callback(niquery->arg, ARES_SUCCESS, niquery->timeouts, - (char *)(host->h_name), - service); - ares_free(niquery); - return; + } } +#endif + niquery->callback(niquery->arg, ARES_SUCCESS, (int)niquery->timeouts, + host->h_name, service); + ares_free(niquery); + return; + } /* We couldn't find the host, but it's OK, we can use the IP */ - else if (status == ARES_ENOTFOUND && !(niquery->flags & ARES_NI_NAMEREQD)) - { - char ipbuf[IPBUFSIZ]; - if (niquery->family == AF_INET) - ares_inet_ntop(AF_INET, &niquery->addr.addr4.sin_addr, ipbuf, - IPBUFSIZ); - else - { - ares_inet_ntop(AF_INET6, &niquery->addr.addr6.sin6_addr, ipbuf, - IPBUFSIZ); + else if (status == ARES_ENOTFOUND && !(niquery->flags & ARES_NI_NAMEREQD)) { + char ipbuf[IPBUFSIZ]; + if (niquery->family == AF_INET) { + ares_inet_ntop(AF_INET, &niquery->addr.addr4.sin_addr, ipbuf, IPBUFSIZ); + } else { + ares_inet_ntop(AF_INET6, &niquery->addr.addr6.sin6_addr, ipbuf, IPBUFSIZ); #ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID - append_scopeid(&niquery->addr.addr6, niquery->flags, ipbuf, - sizeof(ipbuf)); + append_scopeid(&niquery->addr.addr6, niquery->flags, ipbuf, + sizeof(ipbuf)); #endif - } - /* They want a service too */ - if (niquery->flags & ARES_NI_LOOKUPSERVICE) - { - if (niquery->family == AF_INET) - service = lookup_service(niquery->addr.addr4.sin_port, - niquery->flags, srvbuf, sizeof(srvbuf)); - else - service = lookup_service(niquery->addr.addr6.sin6_port, - niquery->flags, srvbuf, sizeof(srvbuf)); - } - niquery->callback(niquery->arg, ARES_SUCCESS, niquery->timeouts, ipbuf, - service); - ares_free(niquery); - return; } - niquery->callback(niquery->arg, status, niquery->timeouts, NULL, NULL); + /* They want a service too */ + if (niquery->flags & ARES_NI_LOOKUPSERVICE) { + if (niquery->family == AF_INET) { + service = lookup_service(niquery->addr.addr4.sin_port, niquery->flags, + srvbuf, sizeof(srvbuf)); + } else { + service = lookup_service(niquery->addr.addr6.sin6_port, niquery->flags, + srvbuf, sizeof(srvbuf)); + } + } + niquery->callback(niquery->arg, ARES_SUCCESS, (int)niquery->timeouts, ipbuf, + service); + ares_free(niquery); + return; + } + niquery->callback(niquery->arg, status, (int)niquery->timeouts, NULL, NULL); ares_free(niquery); } -static char *lookup_service(unsigned short port, int flags, - char *buf, size_t buflen) +static char *lookup_service(unsigned short port, unsigned int flags, char *buf, + size_t buflen) { - const char *proto; + const char *proto; struct servent *sep; #ifdef HAVE_GETSERVBYPORT_R struct servent se; #endif - char tmpbuf[4096]; - char *name; - size_t name_len; + char tmpbuf[4096]; + const char *name; + size_t name_len; - if (port) - { - if (flags & ARES_NI_NUMERICSERV) - sep = NULL; - else - { - if (flags & ARES_NI_UDP) - proto = "udp"; - else if (flags & ARES_NI_SCTP) - proto = "sctp"; - else if (flags & ARES_NI_DCCP) - proto = "dccp"; - else - proto = "tcp"; + if (port) { + if (flags & ARES_NI_NUMERICSERV) { + sep = NULL; + } else { + if (flags & ARES_NI_UDP) { + proto = "udp"; + } else if (flags & ARES_NI_SCTP) { + proto = "sctp"; + } else if (flags & ARES_NI_DCCP) { + proto = "dccp"; + } else { + proto = "tcp"; + } #ifdef HAVE_GETSERVBYPORT_R - memset(&se, 0, sizeof(se)); - sep = &se; - memset(tmpbuf, 0, sizeof(tmpbuf)); -#if GETSERVBYPORT_R_ARGS == 6 - if (getservbyport_r(port, proto, &se, (void *)tmpbuf, - sizeof(tmpbuf), &sep) != 0) - sep = NULL; /* LCOV_EXCL_LINE: buffer large so this never fails */ -#elif GETSERVBYPORT_R_ARGS == 5 - sep = getservbyport_r(port, proto, &se, (void *)tmpbuf, - sizeof(tmpbuf)); -#elif GETSERVBYPORT_R_ARGS == 4 - if (getservbyport_r(port, proto, &se, (void *)tmpbuf) != 0) - sep = NULL; -#else - /* Lets just hope the OS uses TLS! */ - sep = getservbyport(port, proto); -#endif -#else - /* Lets just hope the OS uses TLS! */ -#if (defined(NETWARE) && !defined(__NOVELL_LIBC__)) - sep = getservbyport(port, (char*)proto); + memset(&se, 0, sizeof(se)); + sep = &se; + memset(tmpbuf, 0, sizeof(tmpbuf)); +# if GETSERVBYPORT_R_ARGS == 6 + if (getservbyport_r(port, proto, &se, (void *)tmpbuf, sizeof(tmpbuf), + &sep) != 0) { + sep = NULL; /* LCOV_EXCL_LINE: buffer large so this never fails */ + } +# elif GETSERVBYPORT_R_ARGS == 5 + sep = getservbyport_r(port, proto, &se, (void *)tmpbuf, sizeof(tmpbuf)); +# elif GETSERVBYPORT_R_ARGS == 4 + if (getservbyport_r(port, proto, &se, (void *)tmpbuf) != 0) { + sep = NULL; + } +# else + /* Lets just hope the OS uses TLS! */ + sep = getservbyport(port, proto); +# endif #else - sep = getservbyport(port, proto); -#endif + /* Lets just hope the OS uses TLS! */ +# if (defined(NETWARE) && !defined(__NOVELL_LIBC__)) + sep = getservbyport(port, (char *)proto); +# else + sep = getservbyport(port, proto); +# endif #endif - } - if (sep && sep->s_name) - { - /* get service name */ - name = sep->s_name; - } - else - { - /* get port as a string */ - sprintf(tmpbuf, "%u", (unsigned int)ntohs(port)); - name = tmpbuf; - } - name_len = strlen(name); - if (name_len < buflen) - /* return it if buffer big enough */ - memcpy(buf, name, name_len + 1); - else - /* avoid reusing previous one */ - buf[0] = '\0'; /* LCOV_EXCL_LINE: no real service names are too big */ - return buf; } + if (sep && sep->s_name) { + /* get service name */ + name = sep->s_name; + } else { + /* get port as a string */ + snprintf(tmpbuf, sizeof(tmpbuf), "%u", (unsigned int)ntohs(port)); + name = tmpbuf; + } + name_len = ares_strlen(name); + if (name_len < buflen) { + /* return it if buffer big enough */ + memcpy(buf, name, name_len + 1); + } else { + /* avoid reusing previous one */ + buf[0] = '\0'; /* LCOV_EXCL_LINE: no real service names are too big */ + } + return buf; + } buf[0] = '\0'; return NULL; } #ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID -static void append_scopeid(struct sockaddr_in6 *addr6, unsigned int flags, +static void append_scopeid(const struct sockaddr_in6 *addr6, unsigned int flags, char *buf, size_t buflen) { -#ifdef HAVE_IF_INDEXTONAME - int is_ll, is_mcll; -#endif - char tmpbuf[IF_NAMESIZE + 2]; +# ifdef HAVE_IF_INDEXTONAME + int is_ll; + int is_mcll; +# endif + char tmpbuf[IF_NAMESIZE + 2]; size_t bufl; - int is_scope_long = sizeof(addr6->sin6_scope_id) > sizeof(unsigned int); + int is_scope_long = sizeof(addr6->sin6_scope_id) > sizeof(unsigned int); tmpbuf[0] = '%'; -#ifdef HAVE_IF_INDEXTONAME - is_ll = IN6_IS_ADDR_LINKLOCAL(&addr6->sin6_addr); +# ifdef HAVE_IF_INDEXTONAME + is_ll = IN6_IS_ADDR_LINKLOCAL(&addr6->sin6_addr); is_mcll = IN6_IS_ADDR_MC_LINKLOCAL(&addr6->sin6_addr); - if ((flags & ARES_NI_NUMERICSCOPE) || - (!is_ll && !is_mcll)) - { - if (is_scope_long) - { - sprintf(&tmpbuf[1], "%lu", (unsigned long)addr6->sin6_scope_id); - } - else - { - sprintf(&tmpbuf[1], "%u", (unsigned int)addr6->sin6_scope_id); - } - } - else - { - if (if_indextoname(addr6->sin6_scope_id, &tmpbuf[1]) == NULL) - { - if (is_scope_long) - { - sprintf(&tmpbuf[1], "%lu", (unsigned long)addr6->sin6_scope_id); - } - else - { - sprintf(&tmpbuf[1], "%u", (unsigned int)addr6->sin6_scope_id); - } - } + if ((flags & ARES_NI_NUMERICSCOPE) || (!is_ll && !is_mcll)) { + if (is_scope_long) { + snprintf(&tmpbuf[1], sizeof(tmpbuf) - 1, "%lu", + (unsigned long)addr6->sin6_scope_id); + } else { + snprintf(&tmpbuf[1], sizeof(tmpbuf) - 1, "%u", addr6->sin6_scope_id); } -#else - if (is_scope_long) - { - sprintf(&tmpbuf[1], "%lu", (unsigned long)addr6->sin6_scope_id); - } - else - { - sprintf(&tmpbuf[1], "%u", (unsigned int)addr6->sin6_scope_id); + } else { + if (if_indextoname(addr6->sin6_scope_id, &tmpbuf[1]) == NULL) { + if (is_scope_long) { + snprintf(&tmpbuf[1], sizeof(tmpbuf) - 1, "%lu", + (unsigned long)addr6->sin6_scope_id); + } else { + snprintf(&tmpbuf[1], sizeof(tmpbuf) - 1, "%u", addr6->sin6_scope_id); + } } - (void) flags; -#endif + } +# else + if (is_scope_long) { + snprintf(&tmpbuf[1], sizeof(tmpbuf) - 1, "%lu", + (unsigned long)addr6->sin6_scope_id); + } else { + snprintf(&tmpbuf[1], sizeof(tmpbuf) - 1, "%u", + (unsigned int)addr6->sin6_scope_id); + } + (void)flags; +# endif tmpbuf[IF_NAMESIZE + 1] = '\0'; - bufl = strlen(buf); + bufl = ares_strlen(buf); - if(bufl + strlen(tmpbuf) < buflen) + if (bufl + ares_strlen(tmpbuf) < buflen) { /* only append the scopeid string if it fits in the target buffer */ - strcpy(&buf[bufl], tmpbuf); + ares_strcpy(&buf[bufl], tmpbuf, buflen - bufl); + } } #endif /* Determines if s1 ends with the string in s2 (case-insensitive) */ STATIC_TESTABLE char *ares_striendstr(const char *s1, const char *s2) { - const char *c1, *c2, *c1_begin; - int lo1, lo2; - size_t s1_len = strlen(s1), s2_len = strlen(s2); + const char *c1; + const char *c2; + const char *c1_begin; + int lo1; + int lo2; + size_t s1_len = ares_strlen(s1); + size_t s2_len = ares_strlen(s2); + + if (s1 == NULL || s2 == NULL) { + return NULL; + } /* If the substr is longer than the full str, it can't match */ - if (s2_len > s1_len) + if (s2_len > s1_len) { return NULL; + } /* Jump to the end of s1 minus the length of s2 */ - c1_begin = s1+s1_len-s2_len; - c1 = (const char *)c1_begin; - c2 = s2; - while (c2 < s2+s2_len) - { - lo1 = TOLOWER(*c1); - lo2 = TOLOWER(*c2); - if (lo1 != lo2) - return NULL; - else - { - c1++; - c2++; - } + c1_begin = s1 + s1_len - s2_len; + c1 = c1_begin; + c2 = s2; + while (c2 < s2 + s2_len) { + lo1 = TOLOWER(*c1); + lo2 = TOLOWER(*c2); + if (lo1 != lo2) { + return NULL; + } else { + c1++; + c2++; } - return (char *)c1_begin; + } + /* Cast off const */ + return (char *)((size_t)c1_begin); } -int ares__is_onion_domain(const char *name) +ares_bool_t ares__is_onion_domain(const char *name) { - if (ares_striendstr(name, ".onion")) - return 1; + if (ares_striendstr(name, ".onion")) { + return ARES_TRUE; + } - if (ares_striendstr(name, ".onion.")) - return 1; + if (ares_striendstr(name, ".onion.")) { + return ARES_TRUE; + } - return 0; + return ARES_FALSE; } |