+++ /dev/null
-/*
- * Copyright (c) 2007-2010 Niels Provos and Nick Mathewson
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "event2/event-config.h"
-
-#define _GNU_SOURCE
-
-#ifdef WIN32
-#include <winsock2.h>
-#include <ws2tcpip.h>
-#define WIN32_LEAN_AND_MEAN
-#include <windows.h>
-#undef WIN32_LEAN_AND_MEAN
-#include <io.h>
-#include <tchar.h>
-#endif
-
-#include <sys/types.h>
-#ifdef _EVENT_HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
-#endif
-#ifdef _EVENT_HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-#ifdef _EVENT_HAVE_FCNTL_H
-#include <fcntl.h>
-#endif
-#ifdef _EVENT_HAVE_STDLIB_H
-#include <stdlib.h>
-#endif
-#include <errno.h>
-#include <limits.h>
-#include <stdio.h>
-#include <string.h>
-#ifdef _EVENT_HAVE_ARPA_INET_H
-#include <arpa/inet.h>
-#endif
-#ifdef _EVENT_HAVE_NETINET_IN_H
-#include <netinet/in.h>
-#endif
-#ifdef _EVENT_HAVE_NETINET_IN6_H
-#include <netinet/in6.h>
-#endif
-
-#ifndef _EVENT_HAVE_GETTIMEOFDAY
-#include <sys/timeb.h>
-#include <time.h>
-#endif
-#include <sys/stat.h>
-
-#include "event2/util.h"
-#include "util-internal.h"
-#include "log-internal.h"
-#include "mm-internal.h"
-
-#include "strlcpy-internal.h"
-#include "ipv6-internal.h"
-
-#ifdef WIN32
-#define open _open
-#define read _read
-#define close _close
-#define fstat _fstati64
-#define stat _stati64
-#endif
-
-/**
- Read the contents of 'filename' into a newly allocated NUL-terminated
- string. Set *content_out to hold this string, and *len_out to hold its
- length (not including the appended NUL). If 'is_binary', open the file in
- binary mode.
-
- Returns 0 on success, -1 if the open fails, and -2 for all other failures.
-
- Used internally only; may go away in a future version.
- */
-int
-evutil_read_file(const char *filename, char **content_out, size_t *len_out,
- int is_binary)
-{
- int fd, r;
- struct stat st;
- char *mem;
- size_t read_so_far=0;
- int mode = O_RDONLY;
-
- EVUTIL_ASSERT(content_out);
- EVUTIL_ASSERT(len_out);
- *content_out = NULL;
- *len_out = 0;
-
-#ifdef O_BINARY
- if (is_binary)
- mode |= O_BINARY;
-#endif
-
- fd = open(filename, mode);
- if (fd < 0)
- return -1;
- if (fstat(fd, &st) || st.st_size < 0 ||
- st.st_size > EV_SSIZE_MAX-1 ) {
- close(fd);
- return -2;
- }
- mem = mm_malloc((size_t)st.st_size + 1);
- if (!mem) {
- close(fd);
- return -2;
- }
- read_so_far = 0;
-#ifdef WIN32
-#define N_TO_READ(x) ((x) > INT_MAX) ? INT_MAX : ((int)(x))
-#else
-#define N_TO_READ(x) (x)
-#endif
- while ((r = read(fd, mem+read_so_far, N_TO_READ(st.st_size - read_so_far))) > 0) {
- read_so_far += r;
- if (read_so_far >= (size_t)st.st_size)
- break;
- EVUTIL_ASSERT(read_so_far < (size_t)st.st_size);
- }
- close(fd);
- if (r < 0) {
- mm_free(mem);
- return -2;
- }
- mem[read_so_far] = 0;
-
- *len_out = read_so_far;
- *content_out = mem;
- return 0;
-}
-
-int
-evutil_socketpair(int family, int type, int protocol, evutil_socket_t fd[2])
-{
-#ifndef WIN32
- return socketpair(family, type, protocol, fd);
-#else
- return evutil_ersatz_socketpair(family, type, protocol, fd);
-#endif
-}
-
-int
-evutil_ersatz_socketpair(int family, int type, int protocol,
- evutil_socket_t fd[2])
-{
- /* This code is originally from Tor. Used with permission. */
-
- /* This socketpair does not work when localhost is down. So
- * it's really not the same thing at all. But it's close enough
- * for now, and really, when localhost is down sometimes, we
- * have other problems too.
- */
-#ifdef WIN32
-#define ERR(e) WSA##e
-#else
-#define ERR(e) e
-#endif
- evutil_socket_t listener = -1;
- evutil_socket_t connector = -1;
- evutil_socket_t acceptor = -1;
- struct sockaddr_in listen_addr;
- struct sockaddr_in connect_addr;
- ev_socklen_t size;
- int saved_errno = -1;
-
- if (protocol
- || (family != AF_INET
-#ifdef AF_UNIX
- && family != AF_UNIX
-#endif
- )) {
- EVUTIL_SET_SOCKET_ERROR(ERR(EAFNOSUPPORT));
- return -1;
- }
- if (!fd) {
- EVUTIL_SET_SOCKET_ERROR(ERR(EINVAL));
- return -1;
- }
-
- listener = socket(AF_INET, type, 0);
- if (listener < 0)
- return -1;
- memset(&listen_addr, 0, sizeof(listen_addr));
- listen_addr.sin_family = AF_INET;
- listen_addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
- listen_addr.sin_port = 0; /* kernel chooses port. */
- if (bind(listener, (struct sockaddr *) &listen_addr, sizeof (listen_addr))
- == -1)
- goto tidy_up_and_fail;
- if (listen(listener, 1) == -1)
- goto tidy_up_and_fail;
-
- connector = socket(AF_INET, type, 0);
- if (connector < 0)
- goto tidy_up_and_fail;
- /* We want to find out the port number to connect to. */
- size = sizeof(connect_addr);
- if (getsockname(listener, (struct sockaddr *) &connect_addr, &size) == -1)
- goto tidy_up_and_fail;
- if (size != sizeof (connect_addr))
- goto abort_tidy_up_and_fail;
- if (connect(connector, (struct sockaddr *) &connect_addr,
- sizeof(connect_addr)) == -1)
- goto tidy_up_and_fail;
-
- size = sizeof(listen_addr);
- acceptor = accept(listener, (struct sockaddr *) &listen_addr, &size);
- if (acceptor < 0)
- goto tidy_up_and_fail;
- if (size != sizeof(listen_addr))
- goto abort_tidy_up_and_fail;
- evutil_closesocket(listener);
- /* Now check we are talking to ourself by matching port and host on the
- two sockets. */
- if (getsockname(connector, (struct sockaddr *) &connect_addr, &size) == -1)
- goto tidy_up_and_fail;
- if (size != sizeof (connect_addr)
- || listen_addr.sin_family != connect_addr.sin_family
- || listen_addr.sin_addr.s_addr != connect_addr.sin_addr.s_addr
- || listen_addr.sin_port != connect_addr.sin_port)
- goto abort_tidy_up_and_fail;
- fd[0] = connector;
- fd[1] = acceptor;
-
- return 0;
-
- abort_tidy_up_and_fail:
- saved_errno = ERR(ECONNABORTED);
- tidy_up_and_fail:
- if (saved_errno < 0)
- saved_errno = EVUTIL_SOCKET_ERROR();
- if (listener != -1)
- evutil_closesocket(listener);
- if (connector != -1)
- evutil_closesocket(connector);
- if (acceptor != -1)
- evutil_closesocket(acceptor);
-
- EVUTIL_SET_SOCKET_ERROR(saved_errno);
- return -1;
-#undef ERR
-}
-
-int
-evutil_make_socket_nonblocking(evutil_socket_t fd)
-{
-#ifdef WIN32
- {
- u_long nonblocking = 1;
- if (ioctlsocket(fd, FIONBIO, &nonblocking) == SOCKET_ERROR) {
- event_sock_warn(fd, "fcntl(%d, F_GETFL)", (int)fd);
- return -1;
- }
- }
-#else
- {
- int flags;
- if ((flags = fcntl(fd, F_GETFL, NULL)) < 0) {
- event_warn("fcntl(%d, F_GETFL)", fd);
- return -1;
- }
- if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1) {
- event_warn("fcntl(%d, F_SETFL)", fd);
- return -1;
- }
- }
-#endif
- return 0;
-}
-
-int
-evutil_make_listen_socket_reuseable(evutil_socket_t sock)
-{
-#ifndef WIN32
- int one = 1;
- /* REUSEADDR on Unix means, "don't hang on to this address after the
- * listener is closed." On Windows, though, it means "don't keep other
- * processes from binding to this address while we're using it. */
- return setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void*) &one,
- (ev_socklen_t)sizeof(one));
-#else
- return 0;
-#endif
-}
-
-int
-evutil_make_socket_closeonexec(evutil_socket_t fd)
-{
-#if !defined(WIN32) && defined(_EVENT_HAVE_SETFD)
- int flags;
- if ((flags = fcntl(fd, F_GETFD, NULL)) < 0) {
- event_warn("fcntl(%d, F_GETFD)", fd);
- return -1;
- }
- if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) == -1) {
- event_warn("fcntl(%d, F_SETFD)", fd);
- return -1;
- }
-#endif
- return 0;
-}
-
-int
-evutil_closesocket(evutil_socket_t sock)
-{
-#ifndef WIN32
- return close(sock);
-#else
- return closesocket(sock);
-#endif
-}
-
-ev_int64_t
-evutil_strtoll(const char *s, char **endptr, int base)
-{
-#ifdef _EVENT_HAVE_STRTOLL
- return (ev_int64_t)strtoll(s, endptr, base);
-#elif _EVENT_SIZEOF_LONG == 8
- return (ev_int64_t)strtol(s, endptr, base);
-#elif defined(WIN32) && defined(_MSC_VER) && _MSC_VER < 1300
- /* XXXX on old versions of MS APIs, we only support base
- * 10. */
- ev_int64_t r;
- if (base != 10)
- return 0;
- r = (ev_int64_t) _atoi64(s);
- while (isspace(*s))
- ++s;
- if (*s == '-')
- ++s;
- while (isdigit(*s))
- ++s;
- if (endptr)
- *endptr = (char*) s;
- return r;
-#elif defined(WIN32)
- return (ev_int64_t) _strtoi64(s, endptr, base);
-#elif defined(_EVENT_SIZEOF_LONG_LONG) && _EVENT_SIZEOF_LONG_LONG == 8
- long long r;
- int n;
- if (base != 10 && base != 16)
- return 0;
- if (base == 10) {
- n = sscanf(s, "%lld", &r);
- } else {
- unsigned long long ru=0;
- n = sscanf(s, "%llx", &ru);
- if (ru > EV_INT64_MAX)
- return 0;
- r = (long long) ru;
- }
- if (n != 1)
- return 0;
- while (EVUTIL_ISSPACE(*s))
- ++s;
- if (*s == '-')
- ++s;
- if (base == 10) {
- while (EVUTIL_ISDIGIT(*s))
- ++s;
- } else {
- while (EVUTIL_ISXDIGIT(*s))
- ++s;
- }
- if (endptr)
- *endptr = (char*) s;
- return r;
-#else
-#error "I don't know how to parse 64-bit integers."
-#endif
-}
-
-#ifndef _EVENT_HAVE_GETTIMEOFDAY
-/* No gettimeofday; this muse be windows. */
-int
-evutil_gettimeofday(struct timeval *tv, struct timezone *tz)
-{
- struct _timeb tb;
-
- if (tv == NULL)
- return -1;
-
- /* XXXX
- * _ftime is not the greatest interface here; GetSystemTimeAsFileTime
- * would give us better resolution, whereas something cobbled together
- * with GetTickCount could maybe give us monotonic behavior.
- *
- * Either way, I think this value might be skewed to ignore the
- * timezone, and just return local time. That's not so good.
- */
- _ftime(&tb);
- tv->tv_sec = (long) tb.time;
- tv->tv_usec = ((int) tb.millitm) * 1000;
- return 0;
-}
-#endif
-
-#ifdef WIN32
-int
-evutil_socket_geterror(evutil_socket_t sock)
-{
- int optval, optvallen=sizeof(optval);
- int err = WSAGetLastError();
- if (err == WSAEWOULDBLOCK && sock >= 0) {
- if (getsockopt(sock, SOL_SOCKET, SO_ERROR, (void*)&optval,
- &optvallen))
- return err;
- if (optval)
- return optval;
- }
- return err;
-}
-#endif
-
-/* XXX we should use an enum here. */
-/* 2 for connection refused, 1 for connected, 0 for not yet, -1 for error. */
-int
-evutil_socket_connect(evutil_socket_t *fd_ptr, struct sockaddr *sa, int socklen)
-{
- int made_fd = 0;
-
- if (*fd_ptr < 0) {
- made_fd = 1;
- if ((*fd_ptr = socket(sa->sa_family, SOCK_STREAM, 0)) < 0)
- goto err;
- if (evutil_make_socket_nonblocking(*fd_ptr) < 0) {
- goto err;
- }
- }
-
- if (connect(*fd_ptr, sa, socklen) < 0) {
- int e = evutil_socket_geterror(*fd_ptr);
- if (EVUTIL_ERR_CONNECT_RETRIABLE(e))
- return 0;
- if (EVUTIL_ERR_CONNECT_REFUSED(e))
- return 2;
- goto err;
- } else {
- return 1;
- }
-
-err:
- if (made_fd) {
- evutil_closesocket(*fd_ptr);
- *fd_ptr = -1;
- }
- return -1;
-}
-
-/* Check whether a socket on which we called connect() is done
- connecting. Return 1 for connected, 0 for not yet, -1 for error. In the
- error case, set the current socket errno to the error that happened during
- the connect operation. */
-int
-evutil_socket_finished_connecting(evutil_socket_t fd)
-{
- int e;
- ev_socklen_t elen = sizeof(e);
-
- if (getsockopt(fd, SOL_SOCKET, SO_ERROR, (void*)&e, &elen) < 0)
- return -1;
-
- if (e) {
- if (EVUTIL_ERR_CONNECT_RETRIABLE(e))
- return 0;
- EVUTIL_SET_SOCKET_ERROR(e);
- return -1;
- }
-
- return 1;
-}
-
-#if (EVUTIL_AI_PASSIVE|EVUTIL_AI_CANONNAME|EVUTIL_AI_NUMERICHOST| \
- EVUTIL_AI_NUMERICSERV|EVUTIL_AI_V4MAPPED|EVUTIL_AI_ALL| \
- EVUTIL_AI_ADDRCONFIG) != \
- (EVUTIL_AI_PASSIVE^EVUTIL_AI_CANONNAME^EVUTIL_AI_NUMERICHOST^ \
- EVUTIL_AI_NUMERICSERV^EVUTIL_AI_V4MAPPED^EVUTIL_AI_ALL^ \
- EVUTIL_AI_ADDRCONFIG)
-#error "Some of our EVUTIL_AI_* flags seem to overlap with system AI_* flags"
-#endif
-
-/* We sometimes need to know whether we have an ipv4 address and whether we
- have an ipv6 address. If 'have_checked_interfaces', then we've already done
- the test. If 'had_ipv4_address', then it turns out we had an ipv4 address.
- If 'had_ipv6_address', then it turns out we had an ipv6 address. These are
- set by evutil_check_interfaces. */
-static int have_checked_interfaces, had_ipv4_address, had_ipv6_address;
-
-/* Macro: True iff the IPv4 address 'addr', in host order, is in 127.0.0.0/8
- */
-#define EVUTIL_V4ADDR_IS_LOCALHOST(addr) (((addr)>>24) == 127)
-
-/* Macro: True iff the IPv4 address 'addr', in host order, is a class D
- * (multiclass) address.
- */
-#define EVUTIL_V4ADDR_IS_CLASSD(addr) ((((addr)>>24) & 0xf0) == 0xe0)
-
-/* Test whether we have an ipv4 interface and an ipv6 interface. Return 0 if
- * the test seemed successful. */
-static int
-evutil_check_interfaces(int force_recheck)
-{
- const char ZEROES[] = "\x00\x00\x00\x00\x00\x00\x00\x00"
- "\x00\x00\x00\x00\x00\x00\x00\x00";
- evutil_socket_t fd = -1;
- struct sockaddr_in sin, sin_out;
- struct sockaddr_in6 sin6, sin6_out;
- ev_socklen_t sin_out_len = sizeof(sin_out);
- ev_socklen_t sin6_out_len = sizeof(sin6_out);
- int r;
- char buf[128];
- if (have_checked_interfaces && !force_recheck)
- return 0;
-
- /* To check whether we have an interface open for a given protocol, we
- * try to make a UDP 'connection' to a remote host on the internet.
- * We don't actually use it, so the address doesn't matter, but we
- * want to pick one that keep us from using a host- or link-local
- * interface. */
- memset(&sin, 0, sizeof(sin));
- sin.sin_family = AF_INET;
- sin.sin_port = htons(53);
- r = evutil_inet_pton(AF_INET, "18.244.0.188", &sin.sin_addr);
- EVUTIL_ASSERT(r);
-
- memset(&sin6, 0, sizeof(sin6));
- sin6.sin6_family = AF_INET6;
- sin6.sin6_port = htons(53);
- r = evutil_inet_pton(AF_INET6, "2001:4860:b002::68", &sin6.sin6_addr);
- EVUTIL_ASSERT(r);
-
- memset(&sin_out, 0, sizeof(sin_out));
- memset(&sin6_out, 0, sizeof(sin6_out));
-
- /* XXX some errnos mean 'no address'; some mean 'not enough sockets'. */
- if ((fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) >= 0 &&
- connect(fd, (struct sockaddr*)&sin, sizeof(sin)) == 0 &&
- getsockname(fd, (struct sockaddr*)&sin_out, &sin_out_len) == 0) {
- /* We might have an IPv4 interface. */
- ev_uint32_t addr = ntohl(sin_out.sin_addr.s_addr);
- if (addr == 0 ||
- EVUTIL_V4ADDR_IS_LOCALHOST(addr) ||
- EVUTIL_V4ADDR_IS_CLASSD(addr)) {
- evutil_inet_ntop(AF_INET, &sin_out.sin_addr,
- buf, sizeof(buf));
- /* This is a reserved, ipv4compat, ipv4map, loopback,
- * link-local or unspecified address. The host should
- * never have given it to us; it could never connect
- * to sin. */
- event_warnx("Got a strange local ipv4 address %s",buf);
- } else {
- event_debug(("Detected an IPv4 interface"));
- had_ipv4_address = 1;
- }
- }
- if (fd >= 0)
- evutil_closesocket(fd);
-
- if ((fd = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP)) >= 0 &&
- connect(fd, (struct sockaddr*)&sin6, sizeof(sin6)) == 0 &&
- getsockname(fd, (struct sockaddr*)&sin6_out, &sin6_out_len) == 0) {
- /* We might have an IPv6 interface. */
- const unsigned char *addr =
- (unsigned char*)sin6_out.sin6_addr.s6_addr;
- if (!memcmp(addr, ZEROES, 8) ||
- (addr[0] == 0xfe && (addr[1] & 0xc0) == 0x80)) {
- /* This is a reserved, ipv4compat, ipv4map, loopback,
- * link-local or unspecified address. The host should
- * never have given it to us; it could never connect
- * to sin6. */
- evutil_inet_ntop(AF_INET6, &sin6_out.sin6_addr,
- buf, sizeof(buf));
- event_warnx("Got a strange local ipv6 address %s",buf);
- } else {
- event_debug(("Detected an IPv4 interface"));
- had_ipv6_address = 1;
- }
- }
-
- if (fd >= 0)
- evutil_closesocket(fd);
-
- return 0;
-}
-
-/* Internal addrinfo flag. This one is set when we allocate the addrinfo from
- * inside libevent. Otherwise, the built-in getaddrinfo() function allocated
- * it, and we should trust what they said.
- **/
-#define EVUTIL_AI_LIBEVENT_ALLOCATED 0x80000000
-
-/* Helper: construct a new addrinfo containing the socket address in
- * 'sa', which must be a sockaddr_in or a sockaddr_in6. Take the
- * socktype and protocol info from hints. If they weren't set, then
- * allocate both a TCP and a UDP addrinfo.
- */
-struct evutil_addrinfo *
-evutil_new_addrinfo(struct sockaddr *sa, ev_socklen_t socklen,
- const struct evutil_addrinfo *hints)
-{
- struct evutil_addrinfo *res;
- EVUTIL_ASSERT(hints);
-
- if (hints->ai_socktype == 0 && hints->ai_protocol == 0) {
- /* Indecisive user! Give them a UDP and a TCP. */
- struct evutil_addrinfo *r1, *r2;
- struct evutil_addrinfo tmp;
- memcpy(&tmp, hints, sizeof(tmp));
- tmp.ai_socktype = SOCK_STREAM; tmp.ai_protocol = IPPROTO_TCP;
- r1 = evutil_new_addrinfo(sa, socklen, &tmp);
- if (!r1)
- return NULL;
- tmp.ai_socktype = SOCK_DGRAM; tmp.ai_protocol = IPPROTO_UDP;
- r2 = evutil_new_addrinfo(sa, socklen, &tmp);
- if (!r2) {
- evutil_freeaddrinfo(r1);
- return NULL;
- }
- r1->ai_next = r2;
- return r1;
- }
-
- /* We're going to allocate extra space to hold the sockaddr. */
- res = mm_calloc(1,sizeof(struct evutil_addrinfo)+socklen);
- if (!res)
- return NULL;
- res->ai_addr = (struct sockaddr*)
- (((char*)res) + sizeof(struct evutil_addrinfo));
- memcpy(res->ai_addr, sa, socklen);
- res->ai_addrlen = socklen;
- res->ai_family = sa->sa_family; /* Same or not? XXX */
- res->ai_flags = EVUTIL_AI_LIBEVENT_ALLOCATED;
- res->ai_socktype = hints->ai_socktype;
- res->ai_protocol = hints->ai_protocol;
-
- return res;
-}
-
-/* Append the addrinfo 'append' to the end of 'first', and return the start of
- * the list. Either element can be NULL, in which case we return the element
- * that is not NULL. */
-struct evutil_addrinfo *
-evutil_addrinfo_append(struct evutil_addrinfo *first,
- struct evutil_addrinfo *append)
-{
- struct evutil_addrinfo *ai = first;
- if (!ai)
- return append;
- while (ai->ai_next)
- ai = ai->ai_next;
- ai->ai_next = append;
-
- return first;
-}
-
-static int
-parse_numeric_servname(const char *servname)
-{
- int n;
- char *endptr=NULL;
- n = (int) strtol(servname, &endptr, 10);
- if (n>=0 && n <= 65535 && servname[0] && endptr && !endptr[0])
- return n;
- else
- return -1;
-}
-
-/** Parse a service name in 'servname', which can be a decimal port.
- * Return the port number, or -1 on error.
- */
-static int
-evutil_parse_servname(const char *servname, const char *protocol,
- const struct evutil_addrinfo *hints)
-{
- int n = parse_numeric_servname(servname);
- if (n>=0)
- return n;
-#if defined(_EVENT_HAVE_GETSERVBYNAME) || defined(WIN32)
- if (!(hints->ai_flags & EVUTIL_AI_NUMERICSERV)) {
- struct servent *ent = getservbyname(servname, protocol);
- if (ent) {
- return ntohs(ent->s_port);
- }
- }
-#endif
- return -1;
-}
-
-/* Return a string corresponding to a protocol number that we can pass to
- * getservyname. */
-static const char *
-evutil_unparse_protoname(int proto)
-{
- switch (proto) {
- case 0:
- return NULL;
- case IPPROTO_TCP:
- return "tcp";
- case IPPROTO_UDP:
- return "udp";
-#ifdef IPPROTO_SCTP
- case IPPROTO_SCTP:
- return "sctp";
-#endif
- default:
-#ifdef _EVENT_HAVE_GETPROTOBYNUMBER
- {
- struct protoent *ent = getprotobynumber(proto);
- if (ent)
- return ent->p_name;
- }
-#endif
- return NULL;
- }
-}
-
-static void
-evutil_getaddrinfo_infer_protocols(struct evutil_addrinfo *hints)
-{
- /* If we can guess the protocol from the socktype, do so. */
- if (!hints->ai_protocol && hints->ai_socktype) {
- if (hints->ai_socktype == SOCK_DGRAM)
- hints->ai_protocol = IPPROTO_UDP;
- else if (hints->ai_socktype == SOCK_STREAM)
- hints->ai_protocol = IPPROTO_TCP;
- }
-
- /* Set the socktype if it isn't set. */
- if (!hints->ai_socktype && hints->ai_protocol) {
- if (hints->ai_protocol == IPPROTO_UDP)
- hints->ai_socktype = SOCK_DGRAM;
- else if (hints->ai_protocol == IPPROTO_TCP)
- hints->ai_socktype = SOCK_STREAM;
-#ifdef IPPROTO_SCTP
- else if (hints->ai_protocol == IPPROTO_SCTP)
- hints->ai_socktype = SOCK_STREAM;
-#endif
- }
-}
-
-#if AF_UNSPEC != PF_UNSPEC
-#error "I cannot build on a system where AF_UNSPEC != PF_UNSPEC"
-#endif
-
-/** Implements the part of looking up hosts by name that's common to both
- * the blocking and nonblocking resolver:
- * - Adjust 'hints' to have a reasonable socktype and protocol.
- * - Look up the port based on 'servname', and store it in *portnum,
- * - Handle the nodename==NULL case
- * - Handle some invalid arguments cases.
- * - Handle the cases where nodename is an IPv4 or IPv6 address.
- *
- * If we need the resolver to look up the hostname, we return
- * EVUTIL_EAI_NEED_RESOLVE. Otherwise, we can completely implement
- * getaddrinfo: we return 0 or an appropriate EVUTIL_EAI_* error, and
- * set *res as getaddrinfo would.
- */
-int
-evutil_getaddrinfo_common(const char *nodename, const char *servname,
- struct evutil_addrinfo *hints, struct evutil_addrinfo **res, int *portnum)
-{
- int port = 0;
- const char *pname;
-
- if (nodename == NULL && servname == NULL)
- return EVUTIL_EAI_NONAME;
-
- /* We only understand 3 families */
- if (hints->ai_family != PF_UNSPEC && hints->ai_family != PF_INET &&
- hints->ai_family != PF_INET6)
- return EVUTIL_EAI_FAMILY;
-
- evutil_getaddrinfo_infer_protocols(hints);
-
- /* Look up the port number and protocol, if possible. */
- pname = evutil_unparse_protoname(hints->ai_protocol);
- if (servname) {
- /* XXXX We could look at the protocol we got back from
- * getservbyname, but it doesn't seem too useful. */
- port = evutil_parse_servname(servname, pname, hints);
- if (port < 0) {
- return EVUTIL_EAI_NONAME;
- }
- }
-
- /* If we have no node name, then we're supposed to bind to 'any' and
- * connect to localhost. */
- if (nodename == NULL) {
- struct evutil_addrinfo *res4=NULL, *res6=NULL;
- if (hints->ai_family != PF_INET) { /* INET6 or UNSPEC. */
- struct sockaddr_in6 sin6;
- memset(&sin6, 0, sizeof(sin6));
- sin6.sin6_family = AF_INET6;
- sin6.sin6_port = htons(port);
- if (hints->ai_flags & EVUTIL_AI_PASSIVE) {
- /* Bind to :: */
- } else {
- /* connect to ::1 */
- sin6.sin6_addr.s6_addr[15] = 1;
- }
- res6 = evutil_new_addrinfo((struct sockaddr*)&sin6,
- sizeof(sin6), hints);
- if (!res6)
- return EVUTIL_EAI_MEMORY;
- }
-
- if (hints->ai_family != PF_INET6) { /* INET or UNSPEC */
- struct sockaddr_in sin;
- memset(&sin, 0, sizeof(sin));
- sin.sin_family = AF_INET;
- sin.sin_port = htons(port);
- if (hints->ai_flags & EVUTIL_AI_PASSIVE) {
- /* Bind to 0.0.0.0 */
- } else {
- /* connect to 127.0.0.1 */
- sin.sin_addr.s_addr = htonl(0x7f000001);
- }
- res4 = evutil_new_addrinfo((struct sockaddr*)&sin,
- sizeof(sin), hints);
- if (!res4) {
- if (res6)
- evutil_freeaddrinfo(res6);
- return EVUTIL_EAI_MEMORY;
- }
- }
- *res = evutil_addrinfo_append(res4, res6);
- return 0;
- }
-
- /* If we can, we should try to parse the hostname without resolving
- * it. */
- /* Try ipv6. */
- if (hints->ai_family == PF_INET6 || hints->ai_family == PF_UNSPEC) {
- struct sockaddr_in6 sin6;
- memset(&sin6, 0, sizeof(sin6));
- if (1==evutil_inet_pton(AF_INET6, nodename, &sin6.sin6_addr)) {
- /* Got an ipv6 address. */
- sin6.sin6_family = AF_INET6;
- sin6.sin6_port = htons(port);
- *res = evutil_new_addrinfo((struct sockaddr*)&sin6,
- sizeof(sin6), hints);
- if (!*res)
- return EVUTIL_EAI_MEMORY;
- return 0;
- }
- }
-
- /* Try ipv4. */
- if (hints->ai_family == PF_INET || hints->ai_family == PF_UNSPEC) {
- struct sockaddr_in sin;
- memset(&sin, 0, sizeof(sin));
- if (1==evutil_inet_pton(AF_INET, nodename, &sin.sin_addr)) {
- /* Got an ipv6 address. */
- sin.sin_family = AF_INET;
- sin.sin_port = htons(port);
- *res = evutil_new_addrinfo((struct sockaddr*)&sin,
- sizeof(sin), hints);
- if (!*res)
- return EVUTIL_EAI_MEMORY;
- return 0;
- }
- }
-
-
- /* If we have reached this point, we definitely need to do a DNS
- * lookup. */
- if ((hints->ai_flags & EVUTIL_AI_NUMERICHOST)) {
- /* If we're not allowed to do one, then say so. */
- return EVUTIL_EAI_NONAME;
- }
- *portnum = port;
- return EVUTIL_EAI_NEED_RESOLVE;
-}
-
-#ifdef _EVENT_HAVE_GETADDRINFO
-#define USE_NATIVE_GETADDRINFO
-#endif
-
-#ifdef USE_NATIVE_GETADDRINFO
-/* A mask of all the flags that we declare, so we can clear them before calling
- * the native getaddrinfo */
-static const unsigned int ALL_NONNATIVE_AI_FLAGS =
-#ifndef AI_PASSIVE
- EVUTIL_AI_PASSIVE |
-#endif
-#ifndef AI_CANONNAME
- EVUTIL_AI_CANONNAME |
-#endif
-#ifndef AI_NUMERICHOST
- EVUTIL_AI_NUMERICHOST |
-#endif
-#ifndef AI_NUMERICSERV
- EVUTIL_AI_NUMERICSERV |
-#endif
-#ifndef AI_ADDRCONFIG
- EVUTIL_AI_ADDRCONFIG |
-#endif
-#ifndef AI_ALL
- EVUTIL_AI_ALL |
-#endif
-#ifndef AI_V4MAPPED
- EVUTIL_AI_V4MAPPED |
-#endif
- EVUTIL_AI_LIBEVENT_ALLOCATED;
-
-static const unsigned int ALL_NATIVE_AI_FLAGS =
-#ifdef AI_PASSIVE
- AI_PASSIVE |
-#endif
-#ifdef AI_CANONNAME
- AI_CANONNAME |
-#endif
-#ifdef AI_NUMERICHOST
- AI_NUMERICHOST |
-#endif
-#ifdef AI_NUMERICSERV
- AI_NUMERICSERV |
-#endif
-#ifdef AI_ADDRCONFIG
- AI_ADDRCONFIG |
-#endif
-#ifdef AI_ALL
- AI_ALL |
-#endif
-#ifdef AI_V4MAPPED
- AI_V4MAPPED |
-#endif
- 0;
-#endif
-
-#ifndef USE_NATIVE_GETADDRINFO
-/* Helper for systems with no getaddrinfo(): make one or more addrinfos out of
- * a struct hostent.
- */
-static struct evutil_addrinfo *
-addrinfo_from_hostent(const struct hostent *ent,
- int port, const struct evutil_addrinfo *hints)
-{
- int i;
- struct sockaddr_in sin;
- struct sockaddr_in6 sin6;
- struct sockaddr *sa;
- int socklen;
- struct evutil_addrinfo *res=NULL, *ai;
- void *addrp;
-
- if (ent->h_addrtype == PF_INET) {
- memset(&sin, 0, sizeof(sin));
- sin.sin_family = AF_INET;
- sin.sin_port = htons(port);
- sa = (struct sockaddr *)&sin;
- socklen = sizeof(struct sockaddr_in);
- addrp = &sin.sin_addr;
- if (ent->h_length != sizeof(sin.sin_addr)) {
- event_warnx("Weird h_length from gethostbyname");
- return NULL;
- }
- } else if (ent->h_addrtype == PF_INET6) {
- memset(&sin6, 0, sizeof(sin6));
- sin6.sin6_family = AF_INET6;
- sin6.sin6_port = htons(port);
- sa = (struct sockaddr *)&sin6;
- socklen = sizeof(struct sockaddr_in);
- addrp = &sin6.sin6_addr;
- if (ent->h_length != sizeof(sin6.sin6_addr)) {
- event_warnx("Weird h_length from gethostbyname");
- return NULL;
- }
- } else
- return NULL;
-
- for (i = 0; ent->h_addr_list[i]; ++i) {
- memcpy(addrp, ent->h_addr_list[i], ent->h_length);
- ai = evutil_new_addrinfo(sa, socklen, hints);
- if (!ai) {
- evutil_freeaddrinfo(res);
- return NULL;
- }
- res = evutil_addrinfo_append(res, ai);
- }
-
- if (res && ((hints->ai_flags & EVUTIL_AI_CANONNAME) && ent->h_name)) {
- res->ai_canonname = mm_strdup(ent->h_name);
- if (res->ai_canonname == NULL) {
- evutil_freeaddrinfo(res);
- return NULL;
- }
- }
-
- return res;
-}
-#endif
-
-/* If the EVUTIL_AI_ADDRCONFIG flag is set on hints->ai_flags, and
- * hints->ai_family is PF_UNSPEC, then revise the value of hints->ai_family so
- * that we'll only get addresses we could maybe connect to.
- */
-void
-evutil_adjust_hints_for_addrconfig(struct evutil_addrinfo *hints)
-{
- if (!(hints->ai_flags & EVUTIL_AI_ADDRCONFIG))
- return;
- if (hints->ai_family != PF_UNSPEC)
- return;
- if (!have_checked_interfaces)
- evutil_check_interfaces(0);
- if (had_ipv4_address && !had_ipv6_address) {
- hints->ai_family = PF_INET;
- } else if (!had_ipv4_address && had_ipv6_address) {
- hints->ai_family = PF_INET6;
- }
-}
-
-#ifdef USE_NATIVE_GETADDRINFO
-static int need_numeric_port_hack_=0;
-static int need_socktype_protocol_hack_=0;
-static int tested_for_getaddrinfo_hacks=0;
-
-/* Some older BSDs (like OpenBSD up to 4.6) used to believe that
- giving a numeric port without giving an ai_socktype was verboten.
- We test for this so we can apply an appropriate workaround. If it
- turns out that the bug is present, then:
-
- - If nodename==NULL and servname is numeric, we build an answer
- ourselves using evutil_getaddrinfo_common().
-
- - If nodename!=NULL and servname is numeric, then we set
- servname=NULL when calling getaddrinfo, and post-process the
- result to set the ports on it.
-
- We test for this bug at runtime, since otherwise we can't have the
- same binary run on multiple BSD versions.
-
- - Some versions of Solaris believe that it's nice to leave to protocol
- field set to 0. We test for this so we can apply an appropriate
- workaround.
-*/
-static void
-test_for_getaddrinfo_hacks(void)
-{
- int r, r2;
- struct evutil_addrinfo *ai=NULL, *ai2=NULL;
- struct evutil_addrinfo hints;
-
- memset(&hints,0,sizeof(hints));
- hints.ai_family = PF_UNSPEC;
- hints.ai_flags =
-#ifdef AI_NUMERICHOST
- AI_NUMERICHOST |
-#endif
-#ifdef AI_NUMERICSERV
- AI_NUMERICSERV |
-#endif
- 0;
- r = getaddrinfo("1.2.3.4", "80", &hints, &ai);
- hints.ai_socktype = SOCK_STREAM;
- r2 = getaddrinfo("1.2.3.4", "80", &hints, &ai2);
- if (r2 == 0 && r != 0) {
- need_numeric_port_hack_=1;
- }
- if (ai2 && ai2->ai_protocol == 0) {
- need_socktype_protocol_hack_=1;
- }
-
- if (ai)
- freeaddrinfo(ai);
- if (ai2)
- freeaddrinfo(ai2);
- tested_for_getaddrinfo_hacks=1;
-}
-
-static inline int
-need_numeric_port_hack(void)
-{
- if (!tested_for_getaddrinfo_hacks)
- test_for_getaddrinfo_hacks();
- return need_numeric_port_hack_;
-}
-
-static inline int
-need_socktype_protocol_hack(void)
-{
- if (!tested_for_getaddrinfo_hacks)
- test_for_getaddrinfo_hacks();
- return need_socktype_protocol_hack_;
-}
-
-static void
-apply_numeric_port_hack(int port, struct evutil_addrinfo **ai)
-{
- /* Now we run through the list and set the ports on all of the
- * results where ports would make sense. */
- for ( ; *ai; ai = &(*ai)->ai_next) {
- struct sockaddr *sa = (*ai)->ai_addr;
- if (sa && sa->sa_family == AF_INET) {
- struct sockaddr_in *sin = (struct sockaddr_in*)sa;
- sin->sin_port = htons(port);
- } else if (sa && sa->sa_family == AF_INET6) {
- struct sockaddr_in6 *sin6 = (struct sockaddr_in6*)sa;
- sin6->sin6_port = htons(port);
- } else {
- /* A numeric port makes no sense here; remove this one
- * from the list. */
- struct evutil_addrinfo *victim = *ai;
- *ai = victim->ai_next;
- victim->ai_next = NULL;
- freeaddrinfo(victim);
- }
- }
-}
-
-static int
-apply_socktype_protocol_hack(struct evutil_addrinfo *ai)
-{
- struct evutil_addrinfo *ai_new;
- for (; ai; ai = ai->ai_next) {
- evutil_getaddrinfo_infer_protocols(ai);
- if (ai->ai_socktype || ai->ai_protocol)
- continue;
- ai_new = mm_malloc(sizeof(*ai_new));
- if (!ai_new)
- return -1;
- memcpy(ai_new, ai, sizeof(*ai_new));
- ai->ai_socktype = SOCK_STREAM;
- ai->ai_protocol = IPPROTO_TCP;
- ai_new->ai_socktype = SOCK_DGRAM;
- ai_new->ai_protocol = IPPROTO_UDP;
-
- ai_new->ai_next = ai->ai_next;
- ai->ai_next = ai_new;
- }
- return 0;
-}
-#endif
-
-int
-evutil_getaddrinfo(const char *nodename, const char *servname,
- const struct evutil_addrinfo *hints_in, struct evutil_addrinfo **res)
-{
-#ifdef USE_NATIVE_GETADDRINFO
- struct evutil_addrinfo hints;
- int portnum=-1, need_np_hack, err;
-
- if (hints_in) {
- memcpy(&hints, hints_in, sizeof(hints));
- } else {
- memset(&hints, 0, sizeof(hints));
- hints.ai_family = PF_UNSPEC;
- }
-
-#ifndef AI_ADDRCONFIG
- /* Not every system has AI_ADDRCONFIG, so fake it. */
- if (hints.ai_family == PF_UNSPEC &&
- (hints.ai_flags & EVUTIL_AI_ADDRCONFIG)) {
- evutil_adjust_hints_for_addrconfig(&hints);
- }
-#endif
-
-#ifndef AI_NUMERICSERV
- /* Not every system has AI_NUMERICSERV, so fake it. */
- if (hints.ai_flags & EVUTIL_AI_NUMERICSERV) {
- if (servname && parse_numeric_servname(servname)<0)
- return EVUTIL_EAI_NONAME;
- }
-#endif
-
- /* Enough operating systems handle enough common non-resolve
- * cases here weirdly enough that we are better off just
- * overriding them. For example:
- *
- * - Windows doesn't like to infer the protocol from the
- * socket type, or fill in socket or protocol types much at
- * all. It also seems to do its own broken implicit
- * always-on version of AI_ADDRCONFIG that keeps it from
- * ever resolving even a literal IPv6 address when
- * ai_addrtype is PF_UNSPEC.
- */
-#ifdef WIN32
- {
- int tmp_port;
- err = evutil_getaddrinfo_common(nodename,servname,&hints,
- res, &tmp_port);
- if (err == 0 ||
- err == EVUTIL_EAI_MEMORY ||
- err == EVUTIL_EAI_NONAME)
- return err;
- /* If we make it here, the system getaddrinfo can
- * have a crack at it. */
- }
-#endif
-
- /* See documentation for need_numeric_port_hack above.*/
- need_np_hack = need_numeric_port_hack() && servname && !hints.ai_socktype
- && ((portnum=parse_numeric_servname(servname)) >= 0);
- if (need_np_hack) {
- if (!nodename)
- return evutil_getaddrinfo_common(
- NULL,servname,&hints, res, &portnum);
- servname = NULL;
- }
-
- if (need_socktype_protocol_hack()) {
- evutil_getaddrinfo_infer_protocols(&hints);
- }
-
- /* Make sure that we didn't actually steal any AI_FLAGS values that
- * the system is using. (This is a constant expression, and should ge
- * optimized out.)
- *
- * XXXX Turn this into a compile-time failure rather than a run-time
- * failure.
- */
- EVUTIL_ASSERT((ALL_NONNATIVE_AI_FLAGS & ALL_NATIVE_AI_FLAGS) == 0);
-
- /* Clear any flags that only libevent understands. */
- hints.ai_flags &= ~ALL_NONNATIVE_AI_FLAGS;
-
- err = getaddrinfo(nodename, servname, &hints, res);
- if (need_np_hack)
- apply_numeric_port_hack(portnum, res);
-
- if (need_socktype_protocol_hack()) {
- if (apply_socktype_protocol_hack(*res) < 0) {
- evutil_freeaddrinfo(*res);
- *res = NULL;
- return EVUTIL_EAI_MEMORY;
- }
- }
- return err;
-#else
- int port=0, err;
- struct hostent *ent = NULL;
- struct evutil_addrinfo hints;
-
- if (hints_in) {
- memcpy(&hints, hints_in, sizeof(hints));
- } else {
- memset(&hints, 0, sizeof(hints));
- hints.ai_family = PF_UNSPEC;
- }
-
- evutil_adjust_hints_for_addrconfig(&hints);
-
- err = evutil_getaddrinfo_common(nodename, servname, &hints, res, &port);
- if (err != EVUTIL_EAI_NEED_RESOLVE) {
- /* We either succeeded or failed. No need to continue */
- return err;
- }
-
- err = 0;
- /* Use any of the various gethostbyname_r variants as available. */
- {
-#ifdef _EVENT_HAVE_GETHOSTBYNAME_R_6_ARG
- /* This one is what glibc provides. */
- char buf[2048];
- struct hostent hostent;
- int r;
- r = gethostbyname_r(nodename, &hostent, buf, sizeof(buf), &ent,
- &err);
-#elif defined(_EVENT_HAVE_GETHOSTBYNAME_R_5_ARG)
- char buf[2048];
- struct hostent hostent;
- ent = gethostbyname_r(nodename, &hostent, buf, sizeof(buf),
- &err);
-#elif defined(_EVENT_HAVE_GETHOSTBYNAME_R_3_ARG)
- struct hostent_data data;
- struct hostent hostent;
- memset(&data, 0, sizeof(data));
- err = gethostbyname_r(nodename, &hostent, &data);
- ent = err ? NULL : &hostent;
-#else
- /* fall back to gethostbyname. */
- /* XXXX This needs a lock everywhere but Windows. */
- ent = gethostbyname(nodename);
-#ifdef WIN32
- err = WSAGetLastError();
-#else
- err = h_errno;
-#endif
-#endif
-
- /* Now we have either ent or err set. */
- if (!ent) {
- /* XXX is this right for windows ? */
- switch (err) {
- case TRY_AGAIN:
- return EVUTIL_EAI_AGAIN;
- case NO_RECOVERY:
- default:
- return EVUTIL_EAI_FAIL;
- case HOST_NOT_FOUND:
- return EVUTIL_EAI_NONAME;
- case NO_ADDRESS:
-#if NO_DATA != NO_ADDRESS
- case NO_DATA:
-#endif
- return EVUTIL_EAI_NODATA;
- }
- }
-
- if (ent->h_addrtype != hints.ai_family &&
- hints.ai_family != PF_UNSPEC) {
- /* This wasn't the type we were hoping for. Too bad
- * we never had a chance to ask gethostbyname for what
- * we wanted. */
- return EVUTIL_EAI_NONAME;
- }
-
- /* Make sure we got _some_ answers. */
- if (ent->h_length == 0)
- return EVUTIL_EAI_NODATA;
-
- /* If we got an address type we don't know how to make a
- sockaddr for, give up. */
- if (ent->h_addrtype != PF_INET && ent->h_addrtype != PF_INET6)
- return EVUTIL_EAI_FAMILY;
-
- *res = addrinfo_from_hostent(ent, port, &hints);
- if (! *res)
- return EVUTIL_EAI_MEMORY;
- }
-
- return 0;
-#endif
-}
-
-void
-evutil_freeaddrinfo(struct evutil_addrinfo *ai)
-{
-#ifdef _EVENT_HAVE_GETADDRINFO
- if (!(ai->ai_flags & EVUTIL_AI_LIBEVENT_ALLOCATED)) {
- freeaddrinfo(ai);
- return;
- }
-#endif
- while (ai) {
- struct evutil_addrinfo *next = ai->ai_next;
- if (ai->ai_canonname)
- mm_free(ai->ai_canonname);
- mm_free(ai);
- ai = next;
- }
-}
-
-static evdns_getaddrinfo_fn evdns_getaddrinfo_impl = NULL;
-
-void
-evutil_set_evdns_getaddrinfo_fn(evdns_getaddrinfo_fn fn)
-{
- if (!evdns_getaddrinfo_impl)
- evdns_getaddrinfo_impl = fn;
-}
-
-/* Internal helper function: act like evdns_getaddrinfo if dns_base is set;
- * otherwise do a blocking resolve and pass the result to the callback in the
- * way that evdns_getaddrinfo would.
- */
-int
-evutil_getaddrinfo_async(struct evdns_base *dns_base,
- const char *nodename, const char *servname,
- const struct evutil_addrinfo *hints_in,
- void (*cb)(int, struct evutil_addrinfo *, void *), void *arg)
-{
- if (dns_base && evdns_getaddrinfo_impl) {
- evdns_getaddrinfo_impl(
- dns_base, nodename, servname, hints_in, cb, arg);
- } else {
- struct evutil_addrinfo *ai=NULL;
- int err;
- err = evutil_getaddrinfo(nodename, servname, hints_in, &ai);
- cb(err, ai, arg);
- }
- return 0;
-}
-
-const char *
-evutil_gai_strerror(int err)
-{
- /* As a sneaky side-benefit, this case statement will get most
- * compilers to tell us if any of the error codes we defined
- * conflict with the platform's native error codes. */
- switch (err) {
- case EVUTIL_EAI_CANCEL:
- return "Request canceled";
- case 0:
- return "No error";
-
- case EVUTIL_EAI_ADDRFAMILY:
- return "address family for nodename not supported";
- case EVUTIL_EAI_AGAIN:
- return "temporary failure in name resolution";
- case EVUTIL_EAI_BADFLAGS:
- return "invalid value for ai_flags";
- case EVUTIL_EAI_FAIL:
- return "non-recoverable failure in name resolution";
- case EVUTIL_EAI_FAMILY:
- return "ai_family not supported";
- case EVUTIL_EAI_MEMORY:
- return "memory allocation failure";
- case EVUTIL_EAI_NODATA:
- return "no address associated with nodename";
- case EVUTIL_EAI_NONAME:
- return "nodename nor servname provided, or not known";
- case EVUTIL_EAI_SERVICE:
- return "servname not supported for ai_socktype";
- case EVUTIL_EAI_SOCKTYPE:
- return "ai_socktype not supported";
- case EVUTIL_EAI_SYSTEM:
- return "system error";
- default:
-#if defined(USE_NATIVE_GETADDRINFO) && defined(WIN32)
- return gai_strerrorA(err);
-#elif defined(USE_NATIVE_GETADDRINFO)
- return gai_strerror(err);
-#else
- return "Unknown error code";
-#endif
- }
-}
-
-#ifdef WIN32
-#define E(code, s) { code, (s " [" #code " ]") }
-static struct { int code; const char *msg; } windows_socket_errors[] = {
- E(WSAEINTR, "Interrupted function call"),
- E(WSAEACCES, "Permission denied"),
- E(WSAEFAULT, "Bad address"),
- E(WSAEINVAL, "Invalid argument"),
- E(WSAEMFILE, "Too many open files"),
- E(WSAEWOULDBLOCK, "Resource temporarily unavailable"),
- E(WSAEINPROGRESS, "Operation now in progress"),
- E(WSAEALREADY, "Operation already in progress"),
- E(WSAENOTSOCK, "Socket operation on nonsocket"),
- E(WSAEDESTADDRREQ, "Destination address required"),
- E(WSAEMSGSIZE, "Message too long"),
- E(WSAEPROTOTYPE, "Protocol wrong for socket"),
- E(WSAENOPROTOOPT, "Bad protocol option"),
- E(WSAEPROTONOSUPPORT, "Protocol not supported"),
- E(WSAESOCKTNOSUPPORT, "Socket type not supported"),
- /* What's the difference between NOTSUPP and NOSUPPORT? :) */
- E(WSAEOPNOTSUPP, "Operation not supported"),
- E(WSAEPFNOSUPPORT, "Protocol family not supported"),
- E(WSAEAFNOSUPPORT, "Address family not supported by protocol family"),
- E(WSAEADDRINUSE, "Address already in use"),
- E(WSAEADDRNOTAVAIL, "Cannot assign requested address"),
- E(WSAENETDOWN, "Network is down"),
- E(WSAENETUNREACH, "Network is unreachable"),
- E(WSAENETRESET, "Network dropped connection on reset"),
- E(WSAECONNABORTED, "Software caused connection abort"),
- E(WSAECONNRESET, "Connection reset by peer"),
- E(WSAENOBUFS, "No buffer space available"),
- E(WSAEISCONN, "Socket is already connected"),
- E(WSAENOTCONN, "Socket is not connected"),
- E(WSAESHUTDOWN, "Cannot send after socket shutdown"),
- E(WSAETIMEDOUT, "Connection timed out"),
- E(WSAECONNREFUSED, "Connection refused"),
- E(WSAEHOSTDOWN, "Host is down"),
- E(WSAEHOSTUNREACH, "No route to host"),
- E(WSAEPROCLIM, "Too many processes"),
-
- /* Yes, some of these start with WSA, not WSAE. No, I don't know why. */
- E(WSASYSNOTREADY, "Network subsystem is unavailable"),
- E(WSAVERNOTSUPPORTED, "Winsock.dll out of range"),
- E(WSANOTINITIALISED, "Successful WSAStartup not yet performed"),
- E(WSAEDISCON, "Graceful shutdown now in progress"),
-#ifdef WSATYPE_NOT_FOUND
- E(WSATYPE_NOT_FOUND, "Class type not found"),
-#endif
- E(WSAHOST_NOT_FOUND, "Host not found"),
- E(WSATRY_AGAIN, "Nonauthoritative host not found"),
- E(WSANO_RECOVERY, "This is a nonrecoverable error"),
- E(WSANO_DATA, "Valid name, no data record of requested type)"),
-
- /* There are some more error codes whose numeric values are marked
- * <b>OS dependent</b>. They start with WSA_, apparently for the same
- * reason that practitioners of some craft traditions deliberately
- * introduce imperfections into their baskets and rugs "to allow the
- * evil spirits to escape." If we catch them, then our binaries
- * might not report consistent results across versions of Windows.
- * Thus, I'm going to let them all fall through.
- */
- { -1, NULL },
-};
-#undef E
-/** Equivalent to strerror, but for windows socket errors. */
-const char *
-evutil_socket_error_to_string(int errcode)
-{
- /* XXXX Is there really no built-in function to do this? */
- int i;
- for (i=0; windows_socket_errors[i].code >= 0; ++i) {
- if (errcode == windows_socket_errors[i].code)
- return windows_socket_errors[i].msg;
- }
- return strerror(errcode);
-}
-#endif
-
-int
-evutil_snprintf(char *buf, size_t buflen, const char *format, ...)
-{
- int r;
- va_list ap;
- va_start(ap, format);
- r = evutil_vsnprintf(buf, buflen, format, ap);
- va_end(ap);
- return r;
-}
-
-int
-evutil_vsnprintf(char *buf, size_t buflen, const char *format, va_list ap)
-{
- int r;
- if (!buflen)
- return 0;
-#ifdef _MSC_VER
- r = _vsnprintf(buf, buflen, format, ap);
- if (r < 0)
- r = _vscprintf(format, ap);
-#elif defined(sgi)
- /* Make sure we always use the correct vsnprintf on IRIX */
- extern int _xpg5_vsnprintf(char * __restrict,
- __SGI_LIBC_NAMESPACE_QUALIFIER size_t,
- const char * __restrict, /* va_list */ char *);
-
- r = _xpg5_vsnprintf(buf, buflen, format, ap);
-#else
- r = vsnprintf(buf, buflen, format, ap);
-#endif
- buf[buflen-1] = '\0';
- return r;
-}
-
-#define USE_INTERNAL_NTOP
-#define USE_INTERNAL_PTON
-
-const char *
-evutil_inet_ntop(int af, const void *src, char *dst, size_t len)
-{
-#if defined(_EVENT_HAVE_INET_NTOP) && !defined(USE_INTERNAL_NTOP)
- return inet_ntop(af, src, dst, len);
-#else
- if (af == AF_INET) {
- const struct in_addr *in = src;
- const ev_uint32_t a = ntohl(in->s_addr);
- int r;
- r = evutil_snprintf(dst, len, "%d.%d.%d.%d",
- (int)(ev_uint8_t)((a>>24)&0xff),
- (int)(ev_uint8_t)((a>>16)&0xff),
- (int)(ev_uint8_t)((a>>8 )&0xff),
- (int)(ev_uint8_t)((a )&0xff));
- if (r<0||(size_t)r>=len)
- return NULL;
- else
- return dst;
-#ifdef AF_INET6
- } else if (af == AF_INET6) {
- const struct in6_addr *addr = src;
- char buf[64], *cp;
- int longestGapLen = 0, longestGapPos = -1, i,
- curGapPos = -1, curGapLen = 0;
- ev_uint16_t words[8];
- for (i = 0; i < 8; ++i) {
- words[i] =
- (((ev_uint16_t)addr->s6_addr[2*i])<<8) + addr->s6_addr[2*i+1];
- }
- if (words[0] == 0 && words[1] == 0 && words[2] == 0 && words[3] == 0 &&
- words[4] == 0 && ((words[5] == 0 && words[6] && words[7]) ||
- (words[5] == 0xffff))) {
- /* This is an IPv4 address. */
- if (words[5] == 0) {
- evutil_snprintf(buf, sizeof(buf), "::%d.%d.%d.%d",
- addr->s6_addr[12], addr->s6_addr[13],
- addr->s6_addr[14], addr->s6_addr[15]);
- } else {
- evutil_snprintf(buf, sizeof(buf), "::%x:%d.%d.%d.%d", words[5],
- addr->s6_addr[12], addr->s6_addr[13],
- addr->s6_addr[14], addr->s6_addr[15]);
- }
- if (strlen(buf) > len)
- return NULL;
- strlcpy(dst, buf, len);
- return dst;
- }
- i = 0;
- while (i < 8) {
- if (words[i] == 0) {
- curGapPos = i++;
- curGapLen = 1;
- while (i<8 && words[i] == 0) {
- ++i; ++curGapLen;
- }
- if (curGapLen > longestGapLen) {
- longestGapPos = curGapPos;
- longestGapLen = curGapLen;
- }
- } else {
- ++i;
- }
- }
- if (longestGapLen<=1)
- longestGapPos = -1;
-
- cp = buf;
- for (i = 0; i < 8; ++i) {
- if (words[i] == 0 && longestGapPos == i) {
- if (i == 0)
- *cp++ = ':';
- *cp++ = ':';
- while (i < 8 && words[i] == 0)
- ++i;
- --i; /* to compensate for loop increment. */
- } else {
- evutil_snprintf(cp,
- sizeof(buf)-(cp-buf), "%x", (unsigned)words[i]);
- cp += strlen(cp);
- if (i != 7)
- *cp++ = ':';
- }
- }
- *cp = '\0';
- if (strlen(buf) > len)
- return NULL;
- strlcpy(dst, buf, len);
- return dst;
-#endif
- } else {
- return NULL;
- }
-#endif
-}
-
-int
-evutil_inet_pton(int af, const char *src, void *dst)
-{
-#if defined(_EVENT_HAVE_INET_PTON) && !defined(USE_INTERNAL_PTON)
- return inet_pton(af, src, dst);
-#else
- if (af == AF_INET) {
- int a,b,c,d;
- char more;
- struct in_addr *addr = dst;
- if (sscanf(src, "%d.%d.%d.%d%c", &a,&b,&c,&d,&more) != 4)
- return 0;
- if (a < 0 || a > 255) return 0;
- if (b < 0 || b > 255) return 0;
- if (c < 0 || c > 255) return 0;
- if (d < 0 || d > 255) return 0;
- addr->s_addr = htonl((a<<24) | (b<<16) | (c<<8) | d);
- return 1;
-#ifdef AF_INET6
- } else if (af == AF_INET6) {
- struct in6_addr *out = dst;
- ev_uint16_t words[8];
- int gapPos = -1, i, setWords=0;
- const char *dot = strchr(src, '.');
- const char *eow; /* end of words. */
- if (dot == src)
- return 0;
- else if (!dot)
- eow = src+strlen(src);
- else {
- int byte1,byte2,byte3,byte4;
- char more;
- for (eow = dot-1; eow >= src && EVUTIL_ISDIGIT(*eow); --eow)
- ;
- ++eow;
-
- /* We use "scanf" because some platform inet_aton()s are too lax
- * about IPv4 addresses of the form "1.2.3" */
- if (sscanf(eow, "%d.%d.%d.%d%c",
- &byte1,&byte2,&byte3,&byte4,&more) != 4)
- return 0;
-
- if (byte1 > 255 || byte1 < 0 ||
- byte2 > 255 || byte2 < 0 ||
- byte3 > 255 || byte3 < 0 ||
- byte4 > 255 || byte4 < 0)
- return 0;
-
- words[6] = (byte1<<8) | byte2;
- words[7] = (byte3<<8) | byte4;
- setWords += 2;
- }
-
- i = 0;
- while (src < eow) {
- if (i > 7)
- return 0;
- if (EVUTIL_ISXDIGIT(*src)) {
- char *next;
- long r = strtol(src, &next, 16);
- if (next > 4+src)
- return 0;
- if (next == src)
- return 0;
- if (r<0 || r>65536)
- return 0;
-
- words[i++] = (ev_uint16_t)r;
- setWords++;
- src = next;
- if (*src != ':' && src != eow)
- return 0;
- ++src;
- } else if (*src == ':' && i > 0 && gapPos==-1) {
- gapPos = i;
- ++src;
- } else if (*src == ':' && i == 0 && src[1] == ':' && gapPos==-1) {
- gapPos = i;
- src += 2;
- } else {
- return 0;
- }
- }
-
- if (setWords > 8 ||
- (setWords == 8 && gapPos != -1) ||
- (setWords < 8 && gapPos == -1))
- return 0;
-
- if (gapPos >= 0) {
- int nToMove = setWords - (dot ? 2 : 0) - gapPos;
- int gapLen = 8 - setWords;
- /* assert(nToMove >= 0); */
- if (nToMove < 0)
- return -1; /* should be impossible */
- memmove(&words[gapPos+gapLen], &words[gapPos],
- sizeof(ev_uint16_t)*nToMove);
- memset(&words[gapPos], 0, sizeof(ev_uint16_t)*gapLen);
- }
- for (i = 0; i < 8; ++i) {
- out->s6_addr[2*i ] = words[i] >> 8;
- out->s6_addr[2*i+1] = words[i] & 0xff;
- }
-
- return 1;
-#endif
- } else {
- return -1;
- }
-#endif
-}
-
-int
-evutil_parse_sockaddr_port(const char *ip_as_string, struct sockaddr *out, int *outlen)
-{
- int port;
- char buf[128];
- const char *cp, *addr_part, *port_part;
- int is_ipv6;
- /* recognized formats are:
- * [ipv6]:port
- * ipv6
- * [ipv6]
- * ipv4:port
- * ipv4
- */
-
- cp = strchr(ip_as_string, ':');
- if (*ip_as_string == '[') {
- int len;
- if (!(cp = strchr(ip_as_string, ']'))) {
- return -1;
- }
- len = (int) ( cp-(ip_as_string + 1) );
- if (len > (int)sizeof(buf)-1) {
- return -1;
- }
- memcpy(buf, ip_as_string+1, len);
- buf[len] = '\0';
- addr_part = buf;
- if (cp[1] == ':')
- port_part = cp+2;
- else
- port_part = NULL;
- is_ipv6 = 1;
- } else if (cp && strchr(cp+1, ':')) {
- is_ipv6 = 1;
- addr_part = ip_as_string;
- port_part = NULL;
- } else if (cp) {
- is_ipv6 = 0;
- if (cp - ip_as_string > (int)sizeof(buf)-1) {
- return -1;
- }
- memcpy(buf, ip_as_string, cp-ip_as_string);
- buf[cp-ip_as_string] = '\0';
- addr_part = buf;
- port_part = cp+1;
- } else {
- addr_part = ip_as_string;
- port_part = NULL;
- is_ipv6 = 0;
- }
-
- if (port_part == NULL) {
- port = 0;
- } else {
- port = atoi(port_part);
- if (port <= 0 || port > 65535) {
- return -1;
- }
- }
-
- if (!addr_part)
- return -1; /* Should be impossible. */
-#ifdef AF_INET6
- if (is_ipv6)
- {
- struct sockaddr_in6 sin6;
- memset(&sin6, 0, sizeof(sin6));
-#ifdef _EVENT_HAVE_STRUCT_SOCKADDR_IN6_SIN6_LEN
- sin6.sin6_len = sizeof(sin6);
-#endif
- sin6.sin6_family = AF_INET6;
- sin6.sin6_port = htons(port);
- if (1 != evutil_inet_pton(AF_INET6, addr_part, &sin6.sin6_addr))
- return -1;
- if ((int)sizeof(sin6) > *outlen)
- return -1;
- memset(out, 0, *outlen);
- memcpy(out, &sin6, sizeof(sin6));
- *outlen = sizeof(sin6);
- return 0;
- }
- else
-#endif
- {
- struct sockaddr_in sin;
- memset(&sin, 0, sizeof(sin));
-#ifdef _EVENT_HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
- sin.sin_len = sizeof(sin);
-#endif
- sin.sin_family = AF_INET;
- sin.sin_port = htons(port);
- if (1 != evutil_inet_pton(AF_INET, addr_part, &sin.sin_addr))
- return -1;
- if ((int)sizeof(sin) > *outlen)
- return -1;
- memset(out, 0, *outlen);
- memcpy(out, &sin, sizeof(sin));
- *outlen = sizeof(sin);
- return 0;
- }
-}
-
-const char *
-evutil_format_sockaddr_port(const struct sockaddr *sa, char *out, size_t outlen)
-{
- char b[128];
- const char *res=NULL;
- int port;
- if (sa->sa_family == AF_INET) {
- const struct sockaddr_in *sin = (const struct sockaddr_in*)sa;
- res = evutil_inet_ntop(AF_INET, &sin->sin_addr,b,sizeof(b));
- port = ntohs(sin->sin_port);
- if (res) {
- evutil_snprintf(out, outlen, "%s:%d", b, port);
- return out;
- }
- } else if (sa->sa_family == AF_INET6) {
- const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6*)sa;
- res = evutil_inet_ntop(AF_INET6, &sin6->sin6_addr,b,sizeof(b));
- port = ntohs(sin6->sin6_port);
- if (res) {
- evutil_snprintf(out, outlen, "[%s]:%d", b, port);
- return out;
- }
- }
-
- evutil_snprintf(out, outlen, "<addr with socktype %d>",
- (int)sa->sa_family);
- return out;
-}
-
-int
-evutil_sockaddr_cmp(const struct sockaddr *sa1, const struct sockaddr *sa2,
- int include_port)
-{
- int r;
- if (0 != (r = (sa1->sa_family - sa2->sa_family)))
- return r;
-
- if (sa1->sa_family == AF_INET) {
- const struct sockaddr_in *sin1, *sin2;
- sin1 = (const struct sockaddr_in *)sa1;
- sin2 = (const struct sockaddr_in *)sa2;
- if (sin1->sin_addr.s_addr < sin2->sin_addr.s_addr)
- return -1;
- else if (sin1->sin_addr.s_addr > sin2->sin_addr.s_addr)
- return 1;
- else if (include_port &&
- (r = ((int)sin1->sin_port - (int)sin2->sin_port)))
- return r;
- else
- return 0;
- }
-#ifdef AF_INET6
- else if (sa1->sa_family == AF_INET6) {
- const struct sockaddr_in6 *sin1, *sin2;
- sin1 = (const struct sockaddr_in6 *)sa1;
- sin2 = (const struct sockaddr_in6 *)sa2;
- if ((r = memcmp(sin1->sin6_addr.s6_addr, sin2->sin6_addr.s6_addr, 16)))
- return r;
- else if (include_port &&
- (r = ((int)sin1->sin6_port - (int)sin2->sin6_port)))
- return r;
- else
- return 0;
- }
-#endif
- return 1;
-}
-
-/* Tables to implement ctypes-replacement EVUTIL_IS*() functions. Each table
- * has 256 bits to look up whether a character is in some set or not. This
- * fails on non-ASCII platforms, but so does every other place where we
- * take a char and write it onto the network.
- **/
-static const ev_uint32_t EVUTIL_ISALPHA_TABLE[8] =
- { 0, 0, 0x7fffffe, 0x7fffffe, 0, 0, 0, 0 };
-static const ev_uint32_t EVUTIL_ISALNUM_TABLE[8] =
- { 0, 0x3ff0000, 0x7fffffe, 0x7fffffe, 0, 0, 0, 0 };
-static const ev_uint32_t EVUTIL_ISSPACE_TABLE[8] = { 0x3e00, 0x1, 0, 0, 0, 0, 0, 0 };
-static const ev_uint32_t EVUTIL_ISXDIGIT_TABLE[8] =
- { 0, 0x3ff0000, 0x7e, 0x7e, 0, 0, 0, 0 };
-static const ev_uint32_t EVUTIL_ISDIGIT_TABLE[8] = { 0, 0x3ff0000, 0, 0, 0, 0, 0, 0 };
-static const ev_uint32_t EVUTIL_ISPRINT_TABLE[8] =
- { 0, 0xffffffff, 0xffffffff, 0x7fffffff, 0, 0, 0, 0x0 };
-static const ev_uint32_t EVUTIL_ISUPPER_TABLE[8] = { 0, 0, 0x7fffffe, 0, 0, 0, 0, 0 };
-static const ev_uint32_t EVUTIL_ISLOWER_TABLE[8] = { 0, 0, 0, 0x7fffffe, 0, 0, 0, 0 };
-/* Upper-casing and lowercasing tables to map characters to upper/lowercase
- * equivalents. */
-static const unsigned char EVUTIL_TOUPPER_TABLE[256] = {
- 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,
- 16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,
- 32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,
- 48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,
- 64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,
- 80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,
- 96,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,
- 80,81,82,83,84,85,86,87,88,89,90,123,124,125,126,127,
- 128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,
- 144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,
- 160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,
- 176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,
- 192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,
- 208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,
- 224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,
- 240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255,
-};
-static const unsigned char EVUTIL_TOLOWER_TABLE[256] = {
- 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,
- 16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,
- 32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,
- 48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,
- 64,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,
- 112,113,114,115,116,117,118,119,120,121,122,91,92,93,94,95,
- 96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,
- 112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,
- 128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,
- 144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,
- 160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,
- 176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,
- 192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,
- 208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,
- 224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,
- 240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255,
-};
-
-#define IMPL_CTYPE_FN(name) \
- int EVUTIL_##name(char c) { \
- ev_uint8_t u = c; \
- return !!(EVUTIL_##name##_TABLE[(u >> 5) & 7] & (1 << (u & 31))); \
- }
-IMPL_CTYPE_FN(ISALPHA)
-IMPL_CTYPE_FN(ISALNUM)
-IMPL_CTYPE_FN(ISSPACE)
-IMPL_CTYPE_FN(ISDIGIT)
-IMPL_CTYPE_FN(ISXDIGIT)
-IMPL_CTYPE_FN(ISPRINT)
-IMPL_CTYPE_FN(ISLOWER)
-IMPL_CTYPE_FN(ISUPPER)
-
-char EVUTIL_TOLOWER(char c)
-{
- return ((char)EVUTIL_TOLOWER_TABLE[(ev_uint8_t)c]);
-}
-char EVUTIL_TOUPPER(char c)
-{
- return ((char)EVUTIL_TOUPPER_TABLE[(ev_uint8_t)c]);
-}
-int
-evutil_ascii_strcasecmp(const char *s1, const char *s2)
-{
- char c1, c2;
- while (1) {
- c1 = EVUTIL_TOLOWER(*s1++);
- c2 = EVUTIL_TOLOWER(*s2++);
- if (c1 < c2)
- return -1;
- else if (c1 > c2)
- return 1;
- else if (c1 == 0)
- return 0;
- }
-}
-int evutil_ascii_strncasecmp(const char *s1, const char *s2, size_t n)
-{
- char c1, c2;
- while (n--) {
- c1 = EVUTIL_TOLOWER(*s1++);
- c2 = EVUTIL_TOLOWER(*s2++);
- if (c1 < c2)
- return -1;
- else if (c1 > c2)
- return 1;
- else if (c1 == 0)
- return 0;
- }
- return 0;
-}
-
-static int
-evutil_issetugid(void)
-{
-#ifdef _EVENT_HAVE_ISSETUGID
- return issetugid();
-#else
-
-#ifdef _EVENT_HAVE_GETEUID
- if (getuid() != geteuid())
- return 1;
-#endif
-#ifdef _EVENT_HAVE_GETEGID
- if (getgid() != getegid())
- return 1;
-#endif
- return 0;
-#endif
-}
-
-const char *
-evutil_getenv(const char *varname)
-{
- if (evutil_issetugid())
- return NULL;
-
- return getenv(varname);
-}
-
-long
-_evutil_weakrand(void)
-{
-#ifdef WIN32
- return rand();
-#else
- return random();
-#endif
-}
-
-int
-evutil_sockaddr_is_loopback(const struct sockaddr *addr)
-{
- static const char LOOPBACK_S6[16] =
- "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1";
- if (addr->sa_family == AF_INET) {
- struct sockaddr_in *sin = (struct sockaddr_in *)addr;
- return (ntohl(sin->sin_addr.s_addr) & 0xff000000) == 0x7f000000;
- } else if (addr->sa_family == AF_INET6) {
- struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
- return !memcmp(sin6->sin6_addr.s6_addr, LOOPBACK_S6, 16);
- }
- return 0;
-}
-
-#define MAX_SECONDS_IN_MSEC_LONG \
- (((LONG_MAX) - 999) / 1000)
-
-long
-evutil_tv_to_msec(const struct timeval *tv)
-{
- if (tv->tv_usec > 1000000 || tv->tv_sec > MAX_SECONDS_IN_MSEC_LONG)
- return -1;
-
- return (tv->tv_sec * 1000) + ((tv->tv_usec + 999) / 1000);
-}
-
-int
-evutil_hex_char_to_int(char c)
-{
- switch(c)
- {
- case '0': return 0;
- case '1': return 1;
- case '2': return 2;
- case '3': return 3;
- case '4': return 4;
- case '5': return 5;
- case '6': return 6;
- case '7': return 7;
- case '8': return 8;
- case '9': return 9;
- case 'A': case 'a': return 10;
- case 'B': case 'b': return 11;
- case 'C': case 'c': return 12;
- case 'D': case 'd': return 13;
- case 'E': case 'e': return 14;
- case 'F': case 'f': return 15;
- }
- return -1;
-}
-
-#ifdef WIN32
-HANDLE
-evutil_load_windows_system_library(const TCHAR *library_name)
-{
- TCHAR path[MAX_PATH];
- unsigned n;
- n = GetSystemDirectory(path, MAX_PATH);
- if (n == 0 || n + _tcslen(library_name) + 2 >= MAX_PATH)
- return 0;
- _tcscat(path, TEXT("\\"));
- _tcscat(path, library_name);
- return LoadLibrary(path);
-}
-#endif
-
projects / netatalk.git / blobdiff