diff options
Diffstat (limited to 'evutil.c')
| -rw-r--r-- | evutil.c | 963 |
1 files changed, 711 insertions, 252 deletions
@@ -25,10 +25,9 @@ */ #include "event2/event-config.h" +#include "evconfig-private.h" -#define _GNU_SOURCE - -#ifdef WIN32 +#ifdef _WIN32 #include <winsock2.h> #include <ws2tcpip.h> #define WIN32_LEAN_AND_MEAN @@ -36,77 +35,92 @@ #undef WIN32_LEAN_AND_MEAN #include <io.h> #include <tchar.h> +#include <process.h> +#undef _WIN32_WINNT +/* For structs needed by GetAdaptersAddresses */ +#define _WIN32_WINNT 0x0501 +#include <iphlpapi.h> #endif #include <sys/types.h> -#ifdef _EVENT_HAVE_SYS_SOCKET_H +#ifdef EVENT__HAVE_SYS_SOCKET_H #include <sys/socket.h> #endif -#ifdef _EVENT_HAVE_UNISTD_H +#ifdef EVENT__HAVE_UNISTD_H #include <unistd.h> #endif -#ifdef _EVENT_HAVE_FCNTL_H +#ifdef EVENT__HAVE_FCNTL_H #include <fcntl.h> #endif -#ifdef _EVENT_HAVE_STDLIB_H +#ifdef EVENT__HAVE_STDLIB_H #include <stdlib.h> #endif #include <errno.h> #include <limits.h> #include <stdio.h> #include <string.h> -#ifdef _EVENT_HAVE_NETINET_IN_H +#ifdef EVENT__HAVE_NETINET_IN_H #include <netinet/in.h> #endif -#ifdef _EVENT_HAVE_NETINET_IN6_H +#ifdef EVENT__HAVE_NETINET_IN6_H #include <netinet/in6.h> #endif -#ifdef _EVENT_HAVE_ARPA_INET_H +#ifdef EVENT__HAVE_NETINET_TCP_H +#include <netinet/tcp.h> +#endif +#ifdef EVENT__HAVE_ARPA_INET_H #include <arpa/inet.h> #endif - -#ifndef _EVENT_HAVE_GETTIMEOFDAY -#include <sys/timeb.h> #include <time.h> -#endif #include <sys/stat.h> +#ifdef EVENT__HAVE_IFADDRS_H +#include <ifaddrs.h> +#endif #include "event2/util.h" #include "util-internal.h" #include "log-internal.h" #include "mm-internal.h" +#include "evthread-internal.h" #include "strlcpy-internal.h" #include "ipv6-internal.h" -#ifdef WIN32 +#ifdef _WIN32 +#define HT_NO_CACHE_HASH_VALUES +#include "ht-internal.h" #define open _open #define read _read #define close _close +#ifndef fstat #define fstat _fstati64 +#endif +#ifndef stat #define stat _stati64 +#endif #define mode_t int #endif int -evutil_open_closeonexec(const char *pathname, int flags, unsigned mode) +evutil_open_closeonexec_(const char *pathname, int flags, unsigned mode) { int fd; #ifdef O_CLOEXEC - flags |= O_CLOEXEC; + fd = open(pathname, flags|O_CLOEXEC, (mode_t)mode); + if (fd >= 0 || errno == EINVAL) + return fd; + /* If we got an EINVAL, fall through and try without O_CLOEXEC */ #endif - - if (flags & O_CREAT) - fd = open(pathname, flags, (mode_t)mode); - else - fd = open(pathname, flags); + fd = open(pathname, flags, (mode_t)mode); if (fd < 0) return -1; -#if !defined(O_CLOEXEC) && defined(FD_CLOEXEC) - if (fcntl(fd, F_SETFD, FD_CLOEXEC) < 0) +#if defined(FD_CLOEXEC) + if (fcntl(fd, F_SETFD, FD_CLOEXEC) < 0) { + close(fd); return -1; + } #endif return fd; @@ -123,7 +137,7 @@ evutil_open_closeonexec(const char *pathname, int flags, unsigned mode) Used internally only; may go away in a future version. */ int -evutil_read_file(const char *filename, char **content_out, size_t *len_out, +evutil_read_file_(const char *filename, char **content_out, size_t *len_out, int is_binary) { int fd, r; @@ -142,7 +156,7 @@ evutil_read_file(const char *filename, char **content_out, size_t *len_out, mode |= O_BINARY; #endif - fd = evutil_open_closeonexec(filename, mode, 0); + fd = evutil_open_closeonexec_(filename, mode, 0); if (fd < 0) return -1; if (fstat(fd, &st) || st.st_size < 0 || @@ -156,7 +170,7 @@ evutil_read_file(const char *filename, char **content_out, size_t *len_out, return -2; } read_so_far = 0; -#ifdef WIN32 +#ifdef _WIN32 #define N_TO_READ(x) ((x) > INT_MAX) ? INT_MAX : ((int)(x)) #else #define N_TO_READ(x) (x) @@ -182,15 +196,15 @@ evutil_read_file(const char *filename, char **content_out, size_t *len_out, int evutil_socketpair(int family, int type, int protocol, evutil_socket_t fd[2]) { -#ifndef WIN32 +#ifndef _WIN32 return socketpair(family, type, protocol, fd); #else - return evutil_ersatz_socketpair(family, type, protocol, fd); + return evutil_ersatz_socketpair_(family, type, protocol, fd); #endif } int -evutil_ersatz_socketpair(int family, int type, int protocol, +evutil_ersatz_socketpair_(int family, int type, int protocol, evutil_socket_t fd[2]) { /* This code is originally from Tor. Used with permission. */ @@ -200,7 +214,7 @@ evutil_ersatz_socketpair(int family, int type, int protocol, * for now, and really, when localhost is down sometimes, we * have other problems too. */ -#ifdef WIN32 +#ifdef _WIN32 #define ERR(e) WSA##e #else #define ERR(e) e @@ -294,7 +308,7 @@ evutil_ersatz_socketpair(int family, int type, int protocol, int evutil_make_socket_nonblocking(evutil_socket_t fd) { -#ifdef WIN32 +#ifdef _WIN32 { u_long nonblocking = 1; if (ioctlsocket(fd, FIONBIO, &nonblocking) == SOCKET_ERROR) { @@ -309,19 +323,39 @@ evutil_make_socket_nonblocking(evutil_socket_t fd) 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; + if (!(flags & O_NONBLOCK)) { + if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1) { + event_warn("fcntl(%d, F_SETFL)", fd); + return -1; + } } } #endif return 0; } +/* Faster version of evutil_make_socket_nonblocking for internal use. + * + * Requires that no F_SETFL flags were previously set on the fd. + */ +static int +evutil_fast_socket_nonblocking(evutil_socket_t fd) +{ +#ifdef _WIN32 + return evutil_make_socket_nonblocking(fd); +#else + if (fcntl(fd, F_SETFL, O_NONBLOCK) == -1) { + event_warn("fcntl(%d, F_SETFL)", fd); + return -1; + } + return 0; +#endif +} + int evutil_make_listen_socket_reuseable(evutil_socket_t sock) { -#ifndef WIN32 +#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 @@ -334,15 +368,47 @@ evutil_make_listen_socket_reuseable(evutil_socket_t sock) } int +evutil_make_tcp_listen_socket_deferred(evutil_socket_t sock) +{ +#if defined(EVENT__HAVE_NETINET_TCP_H) && defined(TCP_DEFER_ACCEPT) + int one = 1; + + /* TCP_DEFER_ACCEPT tells the kernel to call defer accept() only after data + * has arrived and ready to read */ + return setsockopt(sock, IPPROTO_TCP, TCP_DEFER_ACCEPT, &one, + (ev_socklen_t)sizeof(one)); +#endif + return 0; +} + +int evutil_make_socket_closeonexec(evutil_socket_t fd) { -#if !defined(WIN32) && defined(_EVENT_HAVE_SETFD) +#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) { + if (!(flags & FD_CLOEXEC)) { + if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) == -1) { + event_warn("fcntl(%d, F_SETFD)", fd); + return -1; + } + } +#endif + return 0; +} + +/* Faster version of evutil_make_socket_closeonexec for internal use. + * + * Requires that no F_SETFD flags were previously set on the fd. + */ +static int +evutil_fast_socket_closeonexec(evutil_socket_t fd) +{ +#if !defined(_WIN32) && defined(EVENT__HAVE_SETFD) + if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1) { event_warn("fcntl(%d, F_SETFD)", fd); return -1; } @@ -353,7 +419,7 @@ evutil_make_socket_closeonexec(evutil_socket_t fd) int evutil_closesocket(evutil_socket_t sock) { -#ifndef WIN32 +#ifndef _WIN32 return close(sock); #else return closesocket(sock); @@ -363,11 +429,11 @@ evutil_closesocket(evutil_socket_t sock) ev_int64_t evutil_strtoll(const char *s, char **endptr, int base) { -#ifdef _EVENT_HAVE_STRTOLL +#ifdef EVENT__HAVE_STRTOLL return (ev_int64_t)strtoll(s, endptr, base); -#elif _EVENT_SIZEOF_LONG == 8 +#elif EVENT__SIZEOF_LONG == 8 return (ev_int64_t)strtol(s, endptr, base); -#elif defined(WIN32) && defined(_MSC_VER) && _MSC_VER < 1300 +#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; @@ -383,9 +449,9 @@ evutil_strtoll(const char *s, char **endptr, int base) if (endptr) *endptr = (char*) s; return r; -#elif defined(WIN32) +#elif defined(_WIN32) return (ev_int64_t) _strtoi64(s, endptr, base); -#elif defined(_EVENT_SIZEOF_LONG_LONG) && _EVENT_SIZEOF_LONG_LONG == 8 +#elif defined(EVENT__SIZEOF_LONG_LONG) && EVENT__SIZEOF_LONG_LONG == 8 long long r; int n; if (base != 10 && base != 16) @@ -401,15 +467,15 @@ evutil_strtoll(const char *s, char **endptr, int base) } if (n != 1) return 0; - while (EVUTIL_ISSPACE(*s)) + while (EVUTIL_ISSPACE_(*s)) ++s; if (*s == '-') ++s; if (base == 10) { - while (EVUTIL_ISDIGIT(*s)) + while (EVUTIL_ISDIGIT_(*s)) ++s; } else { - while (EVUTIL_ISXDIGIT(*s)) + while (EVUTIL_ISXDIGIT_(*s)) ++s; } if (endptr) @@ -420,32 +486,7 @@ evutil_strtoll(const char *s, char **endptr, int base) #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 +#ifdef _WIN32 int evutil_socket_geterror(evutil_socket_t sock) { @@ -465,7 +506,7 @@ evutil_socket_geterror(evutil_socket_t sock) /* 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) +evutil_socket_connect_(evutil_socket_t *fd_ptr, struct sockaddr *sa, int socklen) { int made_fd = 0; @@ -502,7 +543,7 @@ err: 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) +evutil_socket_finished_connecting_(evutil_socket_t fd) { int e; ev_socklen_t elen = sizeof(e); @@ -545,28 +586,150 @@ static int have_checked_interfaces, had_ipv4_address, had_ipv6_address; */ #define EVUTIL_V4ADDR_IS_CLASSD(addr) ((((addr)>>24) & 0xf0) == 0xe0) +static void +evutil_found_ifaddr(const struct sockaddr *sa) +{ + const char ZEROES[] = "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x00\x00\x00\x00"; + + if (sa->sa_family == AF_INET) { + const struct sockaddr_in *sin = (struct sockaddr_in *)sa; + ev_uint32_t addr = ntohl(sin->sin_addr.s_addr); + if (addr == 0 || + EVUTIL_V4ADDR_IS_LOCALHOST(addr) || + EVUTIL_V4ADDR_IS_CLASSD(addr)) { + /* Not actually a usable external address. */ + } else { + event_debug(("Detected an IPv4 interface")); + had_ipv4_address = 1; + } + } else if (sa->sa_family == AF_INET6) { + const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; + const unsigned char *addr = + (unsigned char*)sin6->sin6_addr.s6_addr; + if (!memcmp(addr, ZEROES, 8) || + ((addr[0] & 0xfe) == 0xfc) || + (addr[0] == 0xfe && (addr[1] & 0xc0) == 0x80) || + (addr[0] == 0xfe && (addr[1] & 0xc0) == 0xc0) || + (addr[0] == 0xff)) { + /* This is a reserved, ipv4compat, ipv4map, loopback, + * link-local, multicast, or unspecified address. */ + } else { + event_debug(("Detected an IPv6 interface")); + had_ipv6_address = 1; + } + } +} + +#ifdef _WIN32 +typedef ULONG (WINAPI *GetAdaptersAddresses_fn_t)( + ULONG, ULONG, PVOID, PIP_ADAPTER_ADDRESSES, PULONG); +#endif + +static int +evutil_check_ifaddrs(void) +{ +#if defined(EVENT__HAVE_GETIFADDRS) + /* Most free Unixy systems provide getifaddrs, which gives us a linked list + * of struct ifaddrs. */ + struct ifaddrs *ifa = NULL; + const struct ifaddrs *i; + if (getifaddrs(&ifa) < 0) { + event_warn("Unable to call getifaddrs()"); + return -1; + } + + for (i = ifa; i; i = i->ifa_next) { + if (!i->ifa_addr) + continue; + evutil_found_ifaddr(i->ifa_addr); + } + + freeifaddrs(ifa); + return 0; +#elif defined(_WIN32) + /* Windows XP began to provide GetAdaptersAddresses. Windows 2000 had a + "GetAdaptersInfo", but that's deprecated; let's just try + GetAdaptersAddresses and fall back to connect+getsockname. + */ + HANDLE lib = evutil_load_windows_system_library_(TEXT("ihplapi.dll")); + GetAdaptersAddresses_fn_t fn; + ULONG size, res; + IP_ADAPTER_ADDRESSES *addresses = NULL, *address; + int result = -1; + +#define FLAGS (GAA_FLAG_SKIP_ANYCAST | \ + GAA_FLAG_SKIP_MULTICAST | \ + GAA_FLAG_SKIP_DNS_SERVER) + + if (!lib) + goto done; + + if (!(fn = (GetAdaptersAddresses_fn_t) GetProcAddress(lib, "GetAdaptersAddresses"))) + goto done; + + /* Guess how much space we need. */ + size = 15*1024; + addresses = mm_malloc(size); + if (!addresses) + goto done; + res = fn(AF_UNSPEC, FLAGS, NULL, addresses, &size); + if (res == ERROR_BUFFER_OVERFLOW) { + /* we didn't guess that we needed enough space; try again */ + mm_free(addresses); + addresses = mm_malloc(size); + if (!addresses) + goto done; + res = fn(AF_UNSPEC, FLAGS, NULL, addresses, &size); + } + if (res != NO_ERROR) + goto done; + + for (address = addresses; address; address = address->Next) { + IP_ADAPTER_UNICAST_ADDRESS *a; + for (a = address->FirstUnicastAddress; a; a = a->Next) { + /* Yes, it's a linked list inside a linked list */ + struct sockaddr *sa = a->Address.lpSockaddr; + evutil_found_ifaddr(sa); + } + } + + result = 0; +done: + if (lib) + FreeLibrary(lib); + if (addresses) + mm_free(addresses); + return result; +#else + return -1; +#endif +} + /* 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. */ + if (evutil_check_ifaddrs() == 0) { + /* Use a nice sane interface, if this system has one. */ + return 0; + } + + /* Ugh. There was no nice sane interface. So to check whether we have + * an interface open for a given protocol, will 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); @@ -587,21 +750,7 @@ evutil_check_interfaces(int force_recheck) 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; - } + evutil_found_ifaddr((struct sockaddr*) &sin_out); } if (fd >= 0) evutil_closesocket(fd); @@ -610,21 +759,7 @@ evutil_check_interfaces(int force_recheck) 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; - } + evutil_found_ifaddr((struct sockaddr*) &sin6_out); } if (fd >= 0) @@ -645,7 +780,7 @@ evutil_check_interfaces(int force_recheck) * allocate both a TCP and a UDP addrinfo. */ struct evutil_addrinfo * -evutil_new_addrinfo(struct sockaddr *sa, ev_socklen_t socklen, +evutil_new_addrinfo_(struct sockaddr *sa, ev_socklen_t socklen, const struct evutil_addrinfo *hints) { struct evutil_addrinfo *res; @@ -657,11 +792,11 @@ evutil_new_addrinfo(struct sockaddr *sa, ev_socklen_t socklen, 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); + 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); + r2 = evutil_new_addrinfo_(sa, socklen, &tmp); if (!r2) { evutil_freeaddrinfo(r1); return NULL; @@ -690,7 +825,7 @@ evutil_new_addrinfo(struct sockaddr *sa, ev_socklen_t socklen, * 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, +evutil_addrinfo_append_(struct evutil_addrinfo *first, struct evutil_addrinfo *append) { struct evutil_addrinfo *ai = first; @@ -725,7 +860,7 @@ evutil_parse_servname(const char *servname, const char *protocol, int n = parse_numeric_servname(servname); if (n>=0) return n; -#if defined(_EVENT_HAVE_GETSERVBYNAME) || defined(WIN32) +#if defined(EVENT__HAVE_GETSERVBYNAME) || defined(_WIN32) if (!(hints->ai_flags & EVUTIL_AI_NUMERICSERV)) { struct servent *ent = getservbyname(servname, protocol); if (ent) { @@ -753,7 +888,7 @@ evutil_unparse_protoname(int proto) return "sctp"; #endif default: -#ifdef _EVENT_HAVE_GETPROTOBYNUMBER +#ifdef EVENT__HAVE_GETPROTOBYNUMBER { struct protoent *ent = getprotobynumber(proto); if (ent) @@ -806,7 +941,7 @@ evutil_getaddrinfo_infer_protocols(struct evutil_addrinfo *hints) * set *res as getaddrinfo would. */ int -evutil_getaddrinfo_common(const char *nodename, const char *servname, +evutil_getaddrinfo_common_(const char *nodename, const char *servname, struct evutil_addrinfo *hints, struct evutil_addrinfo **res, int *portnum) { int port = 0; @@ -848,7 +983,7 @@ evutil_getaddrinfo_common(const char *nodename, const char *servname, /* connect to ::1 */ sin6.sin6_addr.s6_addr[15] = 1; } - res6 = evutil_new_addrinfo((struct sockaddr*)&sin6, + res6 = evutil_new_addrinfo_((struct sockaddr*)&sin6, sizeof(sin6), hints); if (!res6) return EVUTIL_EAI_MEMORY; @@ -865,7 +1000,7 @@ evutil_getaddrinfo_common(const char *nodename, const char *servname, /* connect to 127.0.0.1 */ sin.sin_addr.s_addr = htonl(0x7f000001); } - res4 = evutil_new_addrinfo((struct sockaddr*)&sin, + res4 = evutil_new_addrinfo_((struct sockaddr*)&sin, sizeof(sin), hints); if (!res4) { if (res6) @@ -873,7 +1008,7 @@ evutil_getaddrinfo_common(const char *nodename, const char *servname, return EVUTIL_EAI_MEMORY; } } - *res = evutil_addrinfo_append(res4, res6); + *res = evutil_addrinfo_append_(res4, res6); return 0; } @@ -887,7 +1022,7 @@ evutil_getaddrinfo_common(const char *nodename, const char *servname, /* Got an ipv6 address. */ sin6.sin6_family = AF_INET6; sin6.sin6_port = htons(port); - *res = evutil_new_addrinfo((struct sockaddr*)&sin6, + *res = evutil_new_addrinfo_((struct sockaddr*)&sin6, sizeof(sin6), hints); if (!*res) return EVUTIL_EAI_MEMORY; @@ -903,7 +1038,7 @@ evutil_getaddrinfo_common(const char *nodename, const char *servname, /* Got an ipv6 address. */ sin.sin_family = AF_INET; sin.sin_port = htons(port); - *res = evutil_new_addrinfo((struct sockaddr*)&sin, + *res = evutil_new_addrinfo_((struct sockaddr*)&sin, sizeof(sin), hints); if (!*res) return EVUTIL_EAI_MEMORY; @@ -922,7 +1057,7 @@ evutil_getaddrinfo_common(const char *nodename, const char *servname, return EVUTIL_EAI_NEED_RESOLVE; } -#ifdef _EVENT_HAVE_GETADDRINFO +#ifdef EVENT__HAVE_GETADDRINFO #define USE_NATIVE_GETADDRINFO #endif @@ -1021,12 +1156,12 @@ addrinfo_from_hostent(const struct hostent *ent, 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); + ai = evutil_new_addrinfo_(sa, socklen, hints); if (!ai) { evutil_freeaddrinfo(res); return NULL; } - res = evutil_addrinfo_append(res, ai); + res = evutil_addrinfo_append_(res, ai); } if (res && ((hints->ai_flags & EVUTIL_AI_CANONNAME) && ent->h_name)) { @@ -1046,7 +1181,7 @@ addrinfo_from_hostent(const struct hostent *ent, * that we'll only get addresses we could maybe connect to. */ void -evutil_adjust_hints_for_addrconfig(struct evutil_addrinfo *hints) +evutil_adjust_hints_for_addrconfig_(struct evutil_addrinfo *hints) { if (!(hints->ai_flags & EVUTIL_AI_ADDRCONFIG)) return; @@ -1072,7 +1207,7 @@ static int tested_for_getaddrinfo_hacks=0; turns out that the bug is present, then: - If nodename==NULL and servname is numeric, we build an answer - ourselves using evutil_getaddrinfo_common(). + ourselves using evutil_getaddrinfo_common_(). - If nodename!=NULL and servname is numeric, then we set servname=NULL when calling getaddrinfo, and post-process the @@ -1202,7 +1337,7 @@ evutil_getaddrinfo(const char *nodename, const char *servname, /* 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); + evutil_adjust_hints_for_addrconfig_(&hints); } #endif @@ -1225,10 +1360,10 @@ evutil_getaddrinfo(const char *nodename, const char *servname, * ever resolving even a literal IPv6 address when * ai_addrtype is PF_UNSPEC. */ -#ifdef WIN32 +#ifdef _WIN32 { int tmp_port; - err = evutil_getaddrinfo_common(nodename,servname,&hints, + err = evutil_getaddrinfo_common_(nodename,servname,&hints, res, &tmp_port); if (err == 0 || err == EVUTIL_EAI_MEMORY || @@ -1244,7 +1379,7 @@ evutil_getaddrinfo(const char *nodename, const char *servname, && ((portnum=parse_numeric_servname(servname)) >= 0); if (need_np_hack) { if (!nodename) - return evutil_getaddrinfo_common( + return evutil_getaddrinfo_common_( NULL,servname,&hints, res, &portnum); servname = NULL; } @@ -1289,9 +1424,9 @@ evutil_getaddrinfo(const char *nodename, const char *servname, hints.ai_family = PF_UNSPEC; } - evutil_adjust_hints_for_addrconfig(&hints); + evutil_adjust_hints_for_addrconfig_(&hints); - err = evutil_getaddrinfo_common(nodename, servname, &hints, res, &port); + 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; @@ -1300,19 +1435,19 @@ evutil_getaddrinfo(const char *nodename, const char *servname, err = 0; /* Use any of the various gethostbyname_r variants as available. */ { -#ifdef _EVENT_HAVE_GETHOSTBYNAME_R_6_ARG +#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) +#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) +#elif defined(EVENT__HAVE_GETHOSTBYNAME_R_3_ARG) struct hostent_data data; struct hostent hostent; memset(&data, 0, sizeof(data)); @@ -1322,7 +1457,7 @@ evutil_getaddrinfo(const char *nodename, const char *servname, /* fall back to gethostbyname. */ /* XXXX This needs a lock everywhere but Windows. */ ent = gethostbyname(nodename); -#ifdef WIN32 +#ifdef _WIN32 err = WSAGetLastError(); #else err = h_errno; @@ -1377,7 +1512,7 @@ evutil_getaddrinfo(const char *nodename, const char *servname, void evutil_freeaddrinfo(struct evutil_addrinfo *ai) { -#ifdef _EVENT_HAVE_GETADDRINFO +#ifdef EVENT__HAVE_GETADDRINFO if (!(ai->ai_flags & EVUTIL_AI_LIBEVENT_ALLOCATED)) { freeaddrinfo(ai); return; @@ -1395,7 +1530,7 @@ evutil_freeaddrinfo(struct evutil_addrinfo *ai) static evdns_getaddrinfo_fn evdns_getaddrinfo_impl = NULL; void -evutil_set_evdns_getaddrinfo_fn(evdns_getaddrinfo_fn fn) +evutil_set_evdns_getaddrinfo_fn_(evdns_getaddrinfo_fn fn) { if (!evdns_getaddrinfo_impl) evdns_getaddrinfo_impl = fn; @@ -1406,7 +1541,7 @@ evutil_set_evdns_getaddrinfo_fn(evdns_getaddrinfo_fn fn) * way that evdns_getaddrinfo would. */ int -evutil_getaddrinfo_async(struct evdns_base *dns_base, +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) @@ -1458,7 +1593,7 @@ evutil_gai_strerror(int err) case EVUTIL_EAI_SYSTEM: return "system error"; default: -#if defined(USE_NATIVE_GETADDRINFO) && defined(WIN32) +#if defined(USE_NATIVE_GETADDRINFO) && defined(_WIN32) return gai_strerrorA(err); #elif defined(USE_NATIVE_GETADDRINFO) return gai_strerror(err); @@ -1468,81 +1603,178 @@ evutil_gai_strerror(int err) } } -#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 }, +#ifdef _WIN32 +/* destructively remove a trailing line terminator from s */ +static void +chomp (char *s) +{ + size_t len; + if (s && (len = strlen (s)) > 0 && s[len - 1] == '\n') { + s[--len] = 0; + if (len > 0 && s[len - 1] == '\r') + s[--len] = 0; + } +} + +/* FormatMessage returns allocated strings, but evutil_socket_error_to_string + * is supposed to return a string which is good indefinitely without having + * to be freed. To make this work without leaking memory, we cache the + * string the first time FormatMessage is called on a particular error + * code, and then return the cached string on subsequent calls with the + * same code. The strings aren't freed until libevent_global_shutdown + * (or never). We use a linked list to cache the errors, because we + * only expect there to be a few dozen, and that should be fast enough. + */ + +struct cached_sock_errs_entry { + HT_ENTRY(cached_sock_errs_entry) node; + DWORD code; + char *msg; /* allocated with LocalAlloc; free with LocalFree */ }; -#undef E + +static inline unsigned +hash_cached_sock_errs(const struct cached_sock_errs_entry *e) +{ + /* Use Murmur3's 32-bit finalizer as an integer hash function */ + DWORD h = e->code; + h ^= h >> 16; + h *= 0x85ebca6b; + h ^= h >> 13; + h *= 0xc2b2ae35; + h ^= h >> 16; + return h; +} + +static inline int +eq_cached_sock_errs(const struct cached_sock_errs_entry *a, + const struct cached_sock_errs_entry *b) +{ + return a->code == b->code; +} + +#ifndef EVENT__DISABLE_THREAD_SUPPORT +static void *windows_socket_errors_lock_ = NULL; +#endif + +static HT_HEAD(cached_sock_errs_map, cached_sock_errs_entry) + windows_socket_errors = HT_INITIALIZER(); + +HT_PROTOTYPE(cached_sock_errs_map, + cached_sock_errs_entry, + node, + hash_cached_sock_errs, + eq_cached_sock_errs); + +HT_GENERATE(cached_sock_errs_map, + cached_sock_errs_entry, + node, + hash_cached_sock_errs, + eq_cached_sock_errs, + 0.5, + mm_malloc, + mm_realloc, + mm_free); + /** 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); + struct cached_sock_errs_entry *errs, *newerr, find; + char *msg = NULL; + + EVLOCK_LOCK(windows_socket_errors_lock_, 0); + + find.code = errcode; + errs = HT_FIND(cached_sock_errs_map, &windows_socket_errors, &find); + if (errs) { + msg = errs->msg; + goto done; + } + + if (0 != FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | + FORMAT_MESSAGE_IGNORE_INSERTS | + FORMAT_MESSAGE_ALLOCATE_BUFFER, + NULL, errcode, 0, (LPTSTR)&msg, 0, NULL)) + chomp (msg); /* because message has trailing newline */ + else { + size_t len = 50; + /* use LocalAlloc because FormatMessage does */ + msg = LocalAlloc(LMEM_FIXED, len); + if (!msg) { + msg = (char *)"LocalAlloc failed during Winsock error"; + goto done; + } + evutil_snprintf(msg, len, "winsock error 0x%08x", errcode); + } + + newerr = (struct cached_sock_errs_entry *) + mm_malloc(sizeof (struct cached_sock_errs_entry)); + + if (!newerr) { + LocalFree(msg); + msg = (char *)"malloc failed during Winsock error"; + goto done; + } + + newerr->code = errcode; + newerr->msg = msg; + HT_INSERT(cached_sock_errs_map, &windows_socket_errors, newerr); + + done: + EVLOCK_UNLOCK(windows_socket_errors_lock_, 0); + + return msg; +} + +#ifndef EVENT__DISABLE_THREAD_SUPPORT +int +evutil_global_setup_locks_(const int enable_locks) +{ + EVTHREAD_SETUP_GLOBAL_LOCK(windows_socket_errors_lock_, 0); + return 0; +} +#endif + +static void +evutil_free_sock_err_globals(void) +{ + struct cached_sock_errs_entry **errs, *tofree; + + for (errs = HT_START(cached_sock_errs_map, &windows_socket_errors) + ; errs; ) { + tofree = *errs; + errs = HT_NEXT_RMV(cached_sock_errs_map, + &windows_socket_errors, + errs); + LocalFree(tofree->msg); + mm_free(tofree); + } + + HT_CLEAR(cached_sock_errs_map, &windows_socket_errors); + +#ifndef EVENT__DISABLE_THREAD_SUPPORT + if (windows_socket_errors_lock_ != NULL) { + EVTHREAD_FREE_LOCK(windows_socket_errors_lock_, 0); + windows_socket_errors_lock_ = NULL; + } +#endif +} + +#else + +#ifndef EVENT__DISABLE_THREAD_SUPPORT +int +evutil_global_setup_locks_(const int enable_locks) +{ + return 0; +} +#endif + +static void +evutil_free_sock_err_globals(void) +{ } + #endif int @@ -1586,7 +1818,7 @@ evutil_vsnprintf(char *buf, size_t buflen, const char *format, va_list ap) 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) +#if defined(EVENT__HAVE_INET_NTOP) && !defined(USE_INTERNAL_NTOP) return inet_ntop(af, src, dst, len); #else if (af == AF_INET) { @@ -1682,7 +1914,7 @@ evutil_inet_ntop(int af, const void *src, char *dst, size_t len) int evutil_inet_pton(int af, const char *src, void *dst) { -#if defined(_EVENT_HAVE_INET_PTON) && !defined(USE_INTERNAL_PTON) +#if defined(EVENT__HAVE_INET_PTON) && !defined(USE_INTERNAL_PTON) return inet_pton(af, src, dst); #else if (af == AF_INET) { @@ -1711,7 +1943,7 @@ evutil_inet_pton(int af, const char *src, void *dst) else { int byte1,byte2,byte3,byte4; char more; - for (eow = dot-1; eow >= src && EVUTIL_ISDIGIT(*eow); --eow) + for (eow = dot-1; eow >= src && EVUTIL_ISDIGIT_(*eow); --eow) ; ++eow; @@ -1736,7 +1968,7 @@ evutil_inet_pton(int af, const char *src, void *dst) while (src < eow) { if (i > 7) return 0; - if (EVUTIL_ISXDIGIT(*src)) { + if (EVUTIL_ISXDIGIT_(*src)) { char *next; long r = strtol(src, &next, 16); if (next > 4+src) @@ -1859,7 +2091,7 @@ evutil_parse_sockaddr_port(const char *ip_as_string, struct sockaddr *out, int * { struct sockaddr_in6 sin6; memset(&sin6, 0, sizeof(sin6)); -#ifdef _EVENT_HAVE_STRUCT_SOCKADDR_IN6_SIN6_LEN +#ifdef EVENT__HAVE_STRUCT_SOCKADDR_IN6_SIN6_LEN sin6.sin6_len = sizeof(sin6); #endif sin6.sin6_family = AF_INET6; @@ -1878,7 +2110,7 @@ evutil_parse_sockaddr_port(const char *ip_as_string, struct sockaddr *out, int * { struct sockaddr_in sin; memset(&sin, 0, sizeof(sin)); -#ifdef _EVENT_HAVE_STRUCT_SOCKADDR_IN_SIN_LEN +#ifdef EVENT__HAVE_STRUCT_SOCKADDR_IN_SIN_LEN sin.sin_len = sizeof(sin); #endif sin.sin_family = AF_INET; @@ -1895,7 +2127,7 @@ evutil_parse_sockaddr_port(const char *ip_as_string, struct sockaddr *out, int * } const char * -evutil_format_sockaddr_port(const struct sockaddr *sa, char *out, size_t outlen) +evutil_format_sockaddr_port_(const struct sockaddr *sa, char *out, size_t outlen) { char b[128]; const char *res=NULL; @@ -2019,7 +2251,7 @@ static const unsigned char EVUTIL_TOLOWER_TABLE[256] = { }; #define IMPL_CTYPE_FN(name) \ - int EVUTIL_##name(char c) { \ + int EVUTIL_##name##_(char c) { \ ev_uint8_t u = c; \ return !!(EVUTIL_##name##_TABLE[(u >> 5) & 7] & (1 << (u & 31))); \ } @@ -2032,11 +2264,11 @@ IMPL_CTYPE_FN(ISPRINT) IMPL_CTYPE_FN(ISLOWER) IMPL_CTYPE_FN(ISUPPER) -char EVUTIL_TOLOWER(char c) +char EVUTIL_TOLOWER_(char c) { return ((char)EVUTIL_TOLOWER_TABLE[(ev_uint8_t)c]); } -char EVUTIL_TOUPPER(char c) +char EVUTIL_TOUPPER_(char c) { return ((char)EVUTIL_TOUPPER_TABLE[(ev_uint8_t)c]); } @@ -2045,8 +2277,8 @@ evutil_ascii_strcasecmp(const char *s1, const char *s2) { char c1, c2; while (1) { - c1 = EVUTIL_TOLOWER(*s1++); - c2 = EVUTIL_TOLOWER(*s2++); + c1 = EVUTIL_TOLOWER_(*s1++); + c2 = EVUTIL_TOLOWER_(*s2++); if (c1 < c2) return -1; else if (c1 > c2) @@ -2059,8 +2291,8 @@ 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++); + c1 = EVUTIL_TOLOWER_(*s1++); + c2 = EVUTIL_TOLOWER_(*s2++); if (c1 < c2) return -1; else if (c1 > c2) @@ -2071,18 +2303,39 @@ int evutil_ascii_strncasecmp(const char *s1, const char *s2, size_t n) return 0; } +void +evutil_rtrim_lws_(char *str) +{ + char *cp; + + if (str == NULL) + return; + + if ((cp = strchr(str, '\0')) == NULL || (cp == str)) + return; + + --cp; + + while (*cp == ' ' || *cp == '\t') { + *cp = '\0'; + if (cp == str) + break; + --cp; + } +} + static int evutil_issetugid(void) { -#ifdef _EVENT_HAVE_ISSETUGID +#ifdef EVENT__HAVE_ISSETUGID return issetugid(); #else -#ifdef _EVENT_HAVE_GETEUID +#ifdef EVENT__HAVE_GETEUID if (getuid() != geteuid()) return 1; #endif -#ifdef _EVENT_HAVE_GETEGID +#ifdef EVENT__HAVE_GETEGID if (getgid() != getegid()) return 1; #endif @@ -2091,7 +2344,7 @@ evutil_issetugid(void) } const char * -evutil_getenv(const char *varname) +evutil_getenv_(const char *varname) { if (evutil_issetugid()) return NULL; @@ -2099,18 +2352,56 @@ evutil_getenv(const char *varname) return getenv(varname); } -long -_evutil_weakrand(void) +ev_uint32_t +evutil_weakrand_seed_(struct evutil_weakrand_state *state, ev_uint32_t seed) { -#ifdef WIN32 - return rand(); + if (seed == 0) { + struct timeval tv; + evutil_gettimeofday(&tv, NULL); + seed = (ev_uint32_t)tv.tv_sec + (ev_uint32_t)tv.tv_usec; +#ifdef _WIN32 + seed += (ev_uint32_t) _getpid(); #else - return random(); + seed += (ev_uint32_t) getpid(); #endif + } + state->seed = seed; + return seed; +} + +ev_int32_t +evutil_weakrand_(struct evutil_weakrand_state *state) +{ + /* This RNG implementation is a linear congruential generator, with + * modulus 2^31, multiplier 1103515245, and addend 12345. It's also + * used by OpenBSD, and by Glibc's TYPE_0 RNG. + * + * The linear congruential generator is not an industrial-strength + * RNG! It's fast, but it can have higher-order patterns. Notably, + * the low bits tend to have periodicity. + */ + state->seed = ((state->seed) * 1103515245 + 12345) & 0x7fffffff; + return (ev_int32_t)(state->seed); +} + +ev_int32_t +evutil_weakrand_range_(struct evutil_weakrand_state *state, ev_int32_t top) +{ + ev_int32_t divisor, result; + + /* We can't just do weakrand() % top, since the low bits of the LCG + * are less random than the high ones. (Specifically, since the LCG + * modulus is 2^N, every 2^m for m<N will divide the modulus, and so + * therefore the low m bits of the LCG will have period 2^m.) */ + divisor = EVUTIL_WEAKRAND_MAX / top; + do { + result = evutil_weakrand_(state) / divisor; + } while (result >= top); + return result; } int -evutil_sockaddr_is_loopback(const struct sockaddr *addr) +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"; @@ -2124,20 +2415,8 @@ evutil_sockaddr_is_loopback(const struct sockaddr *addr) 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) +evutil_hex_char_to_int_(char c) { switch(c) { @@ -2161,9 +2440,9 @@ evutil_hex_char_to_int(char c) return -1; } -#ifdef WIN32 +#ifdef _WIN32 HANDLE -evutil_load_windows_system_library(const TCHAR *library_name) +evutil_load_windows_system_library_(const TCHAR *library_name) { TCHAR path[MAX_PATH]; unsigned n; @@ -2176,3 +2455,183 @@ evutil_load_windows_system_library(const TCHAR *library_name) } #endif +/* Internal wrapper around 'socket' to provide Linux-style support for + * syscall-saving methods where available. + * + * In addition to regular socket behavior, you can use a bitwise or to set the + * flags EVUTIL_SOCK_NONBLOCK and EVUTIL_SOCK_CLOEXEC in the 'type' argument, + * to make the socket nonblocking or close-on-exec with as few syscalls as + * possible. + */ +evutil_socket_t +evutil_socket_(int domain, int type, int protocol) +{ + evutil_socket_t r; +#if defined(SOCK_NONBLOCK) && defined(SOCK_CLOEXEC) + r = socket(domain, type, protocol); + if (r >= 0) + return r; + else if ((type & (SOCK_NONBLOCK|SOCK_CLOEXEC)) == 0) + return -1; +#endif +#define SOCKET_TYPE_MASK (~(EVUTIL_SOCK_NONBLOCK|EVUTIL_SOCK_CLOEXEC)) + r = socket(domain, type & SOCKET_TYPE_MASK, protocol); + if (r < 0) + return -1; + if (type & EVUTIL_SOCK_NONBLOCK) { + if (evutil_fast_socket_nonblocking(r) < 0) { + evutil_closesocket(r); + return -1; + } + } + if (type & EVUTIL_SOCK_CLOEXEC) { + if (evutil_fast_socket_closeonexec(r) < 0) { + evutil_closesocket(r); + return -1; + } + } + return r; +} + +/* Internal wrapper around 'accept' or 'accept4' to provide Linux-style + * support for syscall-saving methods where available. + * + * In addition to regular accept behavior, you can set one or more of flags + * EVUTIL_SOCK_NONBLOCK and EVUTIL_SOCK_CLOEXEC in the 'flags' argument, to + * make the socket nonblocking or close-on-exec with as few syscalls as + * possible. + */ +evutil_socket_t +evutil_accept4_(evutil_socket_t sockfd, struct sockaddr *addr, + ev_socklen_t *addrlen, int flags) +{ + evutil_socket_t result; +#if defined(EVENT__HAVE_ACCEPT4) && defined(SOCK_CLOEXEC) && defined(SOCK_NONBLOCK) + result = accept4(sockfd, addr, addrlen, flags); + if (result >= 0 || (errno != EINVAL && errno != ENOSYS)) { + /* A nonnegative result means that we succeeded, so return. + * Failing with EINVAL means that an option wasn't supported, + * and failing with ENOSYS means that the syscall wasn't + * there: in those cases we want to fall back. Otherwise, we + * got a real error, and we should return. */ + return result; + } +#endif + result = accept(sockfd, addr, addrlen); + if (result < 0) + return result; + + if (flags & EVUTIL_SOCK_CLOEXEC) { + if (evutil_fast_socket_closeonexec(result) < 0) { + evutil_closesocket(result); + return -1; + } + } + if (flags & EVUTIL_SOCK_NONBLOCK) { + if (evutil_fast_socket_nonblocking(result) < 0) { + evutil_closesocket(result); + return -1; + } + } + return result; +} + +/* Internal function: Set fd[0] and fd[1] to a pair of fds such that writes on + * fd[0] get read from fd[1]. Make both fds nonblocking and close-on-exec. + * Return 0 on success, -1 on failure. + */ +int +evutil_make_internal_pipe_(evutil_socket_t fd[2]) +{ + /* + Making the second socket nonblocking is a bit subtle, given that we + ignore any EAGAIN returns when writing to it, and you don't usally + do that for a nonblocking socket. But if the kernel gives us EAGAIN, + then there's no need to add any more data to the buffer, since + the main thread is already either about to wake up and drain it, + or woken up and in the process of draining it. + */ + +#if defined(EVENT__HAVE_PIPE2) + if (pipe2(fd, O_NONBLOCK|O_CLOEXEC) == 0) + return 0; +#endif +#if defined(EVENT__HAVE_PIPE) + if (pipe(fd) == 0) { + if (evutil_fast_socket_nonblocking(fd[0]) < 0 || + evutil_fast_socket_nonblocking(fd[1]) < 0 || + evutil_fast_socket_closeonexec(fd[0]) < 0 || + evutil_fast_socket_closeonexec(fd[1]) < 0) { + close(fd[0]); + close(fd[1]); + fd[0] = fd[1] = -1; + return -1; + } + return 0; + } else { + event_warn("%s: pipe", __func__); + } +#endif + +#ifdef _WIN32 +#define LOCAL_SOCKETPAIR_AF AF_INET +#else +#define LOCAL_SOCKETPAIR_AF AF_UNIX +#endif + if (evutil_socketpair(LOCAL_SOCKETPAIR_AF, SOCK_STREAM, 0, fd) == 0) { + if (evutil_fast_socket_nonblocking(fd[0]) < 0 || + evutil_fast_socket_nonblocking(fd[1]) < 0 || + evutil_fast_socket_closeonexec(fd[0]) < 0 || + evutil_fast_socket_closeonexec(fd[1]) < 0) { + evutil_closesocket(fd[0]); + evutil_closesocket(fd[1]); + fd[0] = fd[1] = -1; + return -1; + } + return 0; + } + fd[0] = fd[1] = -1; + return -1; +} + +/* Wrapper around eventfd on systems that provide it. Unlike the system + * eventfd, it always supports EVUTIL_EFD_CLOEXEC and EVUTIL_EFD_NONBLOCK as + * flags. Returns -1 on error or if eventfd is not supported. + */ +evutil_socket_t +evutil_eventfd_(unsigned initval, int flags) +{ +#if defined(EVENT__HAVE_EVENTFD) && defined(EVENT__HAVE_SYS_EVENTFD_H) + int r; +#if defined(EFD_CLOEXEC) && defined(EFD_NONBLOCK) + r = eventfd(initval, flags); + if (r >= 0 || flags == 0) + return r; +#endif + r = eventfd(initval, 0); + if (r < 0) + return r; + if (flags & EVUTIL_EFD_CLOEXEC) { + if (evutil_fast_socket_closeonexec(r) < 0) { + evutil_closesocket(r); + return -1; + } + } + if (flags & EVUTIL_EFD_NONBLOCK) { + if (evutil_fast_socket_nonblocking(r) < 0) { + evutil_closesocket(r); + return -1; + } + } + return r; +#else + return -1; +#endif +} + +void +evutil_free_globals_(void) +{ + evutil_free_secure_rng_globals_(); + evutil_free_sock_err_globals(); +} |