X-Git-Url: http://git.pk910.de/?a=blobdiff_plain;f=ircd%2Fos_generic.c;h=9ddb3c40bd686bb83124e62485cc4a2f3581271a;hb=refs%2Fheads%2Fupstream;hp=7b4fe0f01fd9d87d7bb69538bd4571918447deea;hpb=0b1c58ace7aad7919ce1ba9c7e58da9711e59dce;p=ircu2.10.12-pk.git diff --git a/ircd/os_generic.c b/ircd/os_generic.c index 7b4fe0f..9ddb3c4 100644 --- a/ircd/os_generic.c +++ b/ircd/os_generic.c @@ -15,17 +15,33 @@ * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - * $Id$ - * + */ +/** @file + * @brief Implementation of OS-dependent operations. + * @version $Id$ */ #include "config.h" -#define _XOPEN_SOURCE 500 /* make limits.h #define IOV_MAX */ -#define __EXTENSIONS__ 1 /* make Solaris netinet/in.h know IPv6 */ +#ifdef IRCU_SOLARIS +/* Solaris requires C99 support for SUSv3, but C99 support breaks other + * parts of the build. So fall back to SUSv2, but request IPv6 support + * by defining __EXTENSIONS__. + */ +#define _XOPEN_SOURCE 500 +#define __EXTENSIONS__ 1 +#elif defined(__FreeBSD__) && __FreeBSD__ >= 5 +/* FreeBSD 6.0 requires SUSv3 to support IPv6 -- but if you ask for + * that specifically (by defining _XOPEN_SOURCE to anything at all), + * they cleverly hide IPPROTO_IPV6. If you don't ask for anything, + * they give you everything. + */ +#else +#define _XOPEN_SOURCE 600 +#endif #include "ircd_osdep.h" #include "msgq.h" +#include "ircd_log.h" #include "res.h" #include "s_bsd.h" #include "sys.h" @@ -36,7 +52,7 @@ * Solaris requires sys/time.h before struct rusage (indirectly) in * netinet/in.h. */ -#include +/* #include -- Now using assert in ircd_log.h */ #include #include #include @@ -58,8 +74,12 @@ #include #endif +#if defined(IPV6_BINDV6ONLY) &&!defined(IPV6_V6ONLY) +# define IPV6_V6ONLY IPV6_BINDV6ONLY +#endif + #ifndef IOV_MAX -#define IOV_MAX 16 /* minimum required */ +#define IOV_MAX 16 /**< minimum required length of an iovec array */ #endif #ifdef HPUX @@ -67,10 +87,38 @@ #define getrusage(a,b) syscall(SYS_GETRUSAGE, a, b) #endif +static int is_blocked(int error) +{ + return EWOULDBLOCK == error +#ifdef ENOMEM + || ENOMEM == error +#endif +#ifdef ENOBUFS + || ENOBUFS == error +#endif + || EAGAIN == error; +} + +static void sockaddr_in_to_irc(const struct sockaddr_in *v4, + struct irc_sockaddr *irc) +{ + memset(&irc->addr, 0, 5*sizeof(int16_t)); + irc->addr.in6_16[5] = 0xffff; + memcpy(&irc->addr.in6_16[6], &v4->sin_addr, sizeof(v4->sin_addr)); + irc->port = ntohs(v4->sin_port); +} + + #ifdef IPV6 +/** Native socket address type. */ #define sockaddr_native sockaddr_in6 +/** Field name inside sockaddr_native to find address family. */ #define sn_family sin6_family +/** Convert native socket address to IRC format. + * @param[in] v6 Native socket address. + * @param[out] irc IRC format socket address. + */ void sockaddr_to_irc(const struct sockaddr_in6 *v6, struct irc_sockaddr *irc) { if (v6->sin6_family == AF_INET6) { @@ -78,24 +126,36 @@ void sockaddr_to_irc(const struct sockaddr_in6 *v6, struct irc_sockaddr *irc) irc->port = ntohs(v6->sin6_port); } else if (v6->sin6_family == AF_INET) { - const struct sockaddr_in *v4 = (const struct sockaddr_in*)v6; - memset(&irc->addr, 0, 5*sizeof(int16_t)); - irc->addr.in6_16[5] = 0xffff; - memcpy(&irc->addr.in6_16[6], &v4->sin_addr, sizeof(v4->sin_addr)); - irc->port = ntohs(v4->sin_port); + sockaddr_in_to_irc((struct sockaddr_in *)v6, irc); } else assert(0 && "Unhandled native address family"); } -int sockaddr_from_irc(struct sockaddr_in6 *v6, const struct irc_sockaddr *irc, int persist) +/** Convert IRC socket address to native format. + * @param[out] v6 Native socket address. + * @param[in] irc IRC socket address. + * @param[in] compat_fd If non-negative, an FD specifying address family. + * @return Length of address written to \a v6. + */ +int sockaddr_from_irc(struct sockaddr_in6 *v6, const struct irc_sockaddr *irc, int compat_fd, int family) { + struct sockaddr_in6 sin6; + socklen_t slen; + + assert(irc != 0); + slen = sizeof(sin6); + if (family) { + /* accept whatever user specified */ + } else if ((0 <= compat_fd) + && (0 == getsockname(compat_fd, (struct sockaddr*)&sin6, &slen))) + family = sin6.sin6_family; + else if ((irc == &VirtualHost_v4) || irc_in_addr_is_ipv4(&irc->addr)) + family = AF_INET; + else + family = AF_INET6; + memset(v6, 0, sizeof(*v6)); - if (!irc) { - memset(v6, 0, sizeof(v6)); - v6->sin6_family = AF_INET6; - return sizeof(*v6); - } - else if (persist && irc_in_addr_is_ipv4(&irc->addr)) { + if (family == AF_INET) { struct sockaddr_in *v4 = (struct sockaddr_in*)v6; v4->sin_family = AF_INET; memcpy(&v4->sin_addr, &irc->addr.in6_16[6], sizeof(v4->sin_addr)); @@ -113,37 +173,30 @@ int sockaddr_from_irc(struct sockaddr_in6 *v6, const struct irc_sockaddr *irc, i #else #define sockaddr_native sockaddr_in #define sn_family sin_family +#define sockaddr_to_irc sockaddr_in_to_irc -void sockaddr_to_irc(const struct sockaddr_in *v4, struct irc_sockaddr *irc) -{ - assert(v4->sin_family == AF_INET); - memset(&irc->addr, 0, 6*sizeof(irc->addr.in6_16[0])); - memcpy(&irc->addr.in6_16[6], &v4->sin_addr, sizeof(v4->sin_addr)); - irc->port = ntohs(v4->sin_port); -} - -int sockaddr_from_irc(struct sockaddr_in *v4, const struct irc_sockaddr *irc, int persist) +int sockaddr_from_irc(struct sockaddr_in *v4, const struct irc_sockaddr *irc, int compat_fd, int family) { + assert(irc != 0); + memset(v4, 0, sizeof(*v4)); v4->sin_family = AF_INET; if (irc) { assert(!irc->addr.in6_16[0] && !irc->addr.in6_16[1] && !irc->addr.in6_16[2] && !irc->addr.in6_16[3] && !irc->addr.in6_16[4] && (!irc->addr.in6_16[5] || irc->addr.in6_16[5] == 0xffff)); memcpy(&v4->sin_addr, &irc->addr.in6_16[6], sizeof(v4->sin_addr)); v4->sin_port = htons(irc->port); - } else{ - memset(&v4, 0, sizeof(v4)); } - (void)persist; + (void)compat_fd; (void)family; return sizeof(*v4); } #endif -/* - * This is part of the STATS replies. There is no offical numeric for this - * since this isnt an official command, in much the same way as HASH isnt. - * It is also possible that some systems wont support this call or have - * different field names for "struct rusage". - * -avalon +#ifdef DEBUGMODE +/** Send resource usage information to an enumerator function. + * @param[in] cptr Client requesting information. + * @param[in] uptime Wall time in seconds since the server started. + * @param[in] enumerator Function to call to send a line to \a cptr. + * @return Zero if some usage reports could not be sent, non-zero on success. */ int os_get_rusage(struct Client *cptr, int uptime, EnumFn enumerator) { @@ -232,7 +285,12 @@ int os_get_rusage(struct Client *cptr, int uptime, EnumFn enumerator) #endif /* HAVE_GETRUSAGE */ return 1; } +#endif +/** Look up the most recent socket error for a socket file descriptor. + * @param[in] fd File descriptor to check. + * @return Error code from the socket, or 0 if the OS does not support this. + */ int os_get_sockerr(int fd) { int err = 0; @@ -243,14 +301,9 @@ int os_get_sockerr(int fd) return err; } -/* - * set_non_blocking - * - * Set the client connection into non-blocking mode. If your - * system doesn't support this, you can make this a dummy - * function (and get all the old problems that plagued the - * blocking version of IRC--not a problem if you are a - * lightly loaded node...) +/** Set a file descriptor to non-blocking mode. + * @param[in] fd %Socket file descriptor. + * @return Non-zero on success, or zero on failure. */ int os_set_nonblocking(int fd) { @@ -286,9 +339,9 @@ int os_set_nonblocking(int fd) return 1; } - -/* - * set_sock_opts +/** Mark a socket's address as reusable. + * @param[in] fd %Socket file descriptor to manipulate. + * @return Non-zero on success, or zero on failure. */ int os_set_reuseaddr(int fd) { @@ -297,6 +350,12 @@ int os_set_reuseaddr(int fd) (const char*) &opt, sizeof(opt))); } +/** Set a socket's send and receive buffer sizes. + * @param[in] fd %Socket file descriptor to manipulate. + * @param[in] ssize New send buffer size. + * @param[in] rsize New receive buffer size. + * @return Non-zero on success, or zero on failure. + */ int os_set_sockbufs(int fd, unsigned int ssize, unsigned int rsize) { unsigned int sopt = ssize; @@ -307,6 +366,11 @@ int os_set_sockbufs(int fd, unsigned int ssize, unsigned int rsize) (const char*) &sopt, sizeof(sopt))); } +/** Set a socket's "type of service" value. + * @param[in] fd %Socket file descriptor to manipulate. + * @param[in] tos New type of service value to use. + * @return Non-zero on success, or zero on failure. + */ int os_set_tos(int fd,int tos) { #if defined(IP_TOS) && defined(IPPROTO_IP) @@ -317,6 +381,10 @@ int os_set_tos(int fd,int tos) #endif } +/** Disable IP options on a socket. + * @param[in] fd %Socket file descriptor to manipulate. + * @return Non-zero on success, or zero on failure. + */ int os_disable_options(int fd) { #if defined(IP_OPTIONS) && defined(IPPROTO_IP) @@ -344,13 +412,18 @@ int os_disable_options(int fd) #endif #endif +/** Set file descriptor limit for the process. + * @param[in] max_descriptors Ideal number of file descriptors. + * @return Zero on success; -1 on error; positive number of possible + * file descriptors if \a max_descriptors is too high. + */ int os_set_fdlimit(unsigned int max_descriptors) { #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_FD_MAX) struct rlimit limit; if (!getrlimit(RLIMIT_FD_MAX, &limit)) { - if (limit.rlim_max < MAXCONNECTIONS) + if (limit.rlim_max < max_descriptors) return limit.rlim_max; limit.rlim_cur = limit.rlim_max; /* make soft limit the max */ return setrlimit(RLIMIT_FD_MAX, &limit); @@ -359,14 +432,12 @@ int os_set_fdlimit(unsigned int max_descriptors) return 0; } -/* - * os_recv_nonb - non blocking read of a connection - * returns: - * 1 if data was read or socket is blocked (recoverable error) - * count_out > 0 if data was read - * - * 0 if socket closed from other end - * -1 if an unrecoverable error occurred +/** Attempt to read from a non-blocking socket. + * @param[in] fd File descriptor to read from. + * @param[out] buf Output buffer to read into. + * @param[in] length Number of bytes to read. + * @param[out] count_out Receives number of bytes actually read. + * @return An IOResult value indicating status. */ IOResult os_recv_nonb(int fd, char* buf, unsigned int length, unsigned int* count_out) @@ -374,33 +445,28 @@ IOResult os_recv_nonb(int fd, char* buf, unsigned int length, int res; assert(0 != buf); assert(0 != count_out); - *count_out = 0; - errno = 0; if (0 < (res = recv(fd, buf, length, 0))) { *count_out = (unsigned) res; return IO_SUCCESS; + } else if (res == 0) { + *count_out = 0; + errno = 0; /* or ECONNRESET? */ + return IO_FAILURE; + } else { + *count_out = 0; + return is_blocked(errno) ? IO_BLOCKED : IO_FAILURE; } - else if (res < 0) { - if (EWOULDBLOCK == errno || EAGAIN == errno -#ifdef ENOMEM - || ENOMEM == errno -#endif -#ifdef ENOBUFS - || ENOBUFS == errno -#endif - ) - return IO_BLOCKED; - else - return IO_FAILURE; - } - /* - * 0 == client closed the connection - * < 1 == error - */ - return IO_FAILURE; } +/** Attempt to read from a non-blocking UDP socket. + * @param[in] fd File descriptor to read from. + * @param[out] buf Output buffer to read into. + * @param[in] length Number of bytes to read. + * @param[out] length_out Receives number of bytes actually read. + * @param[out] addr_out Peer address that sent the message. + * @return An IOResult value indicating status. + */ IOResult os_recvfrom_nonb(int fd, char* buf, unsigned int length, unsigned int* length_out, struct irc_sockaddr* addr_out) @@ -411,33 +477,26 @@ IOResult os_recvfrom_nonb(int fd, char* buf, unsigned int length, assert(0 != buf); assert(0 != length_out); assert(0 != addr_out); - errno = 0; - *length_out = 0; res = recvfrom(fd, buf, length, 0, (struct sockaddr*) &addr, &len); - if (-1 == res) { - if (EWOULDBLOCK == errno || ENOMEM == errno -#ifdef ENOMEM - || ENOMEM == errno -#endif -#ifdef ENOBUFS - || ENOBUFS == errno -#endif - ) - return IO_BLOCKED; - return IO_FAILURE; + if (-1 < res) { + sockaddr_to_irc(&addr, addr_out); + *length_out = res; + return IO_SUCCESS; + } else { + *length_out = 0; + return is_blocked(errno) ? IO_BLOCKED : IO_FAILURE; } - sockaddr_to_irc(&addr, addr_out); - *length_out = res; - return IO_SUCCESS; } -/* - * os_sendto_nonb - non blocking send to a UDP socket - * returns: - * 1 if data was written, *count_out contains number of bytes - * 0 if sendto call blocked - * -1 if an unrecoverable error occurred +/** Attempt to write on a non-blocking UDP socket. + * @param[in] fd File descriptor to write to. + * @param[in] buf Output buffer to send from. + * @param[in] length Number of bytes to write. + * @param[out] count_out Receives number of bytes actually written. + * @param[in] flags Flags for call to sendto(). + * @param[in] peer Destination address of the message. + * @return An IOResult value indicating status. */ IOResult os_sendto_nonb(int fd, const char* buf, unsigned int length, unsigned int* count_out, unsigned int flags, @@ -446,36 +505,26 @@ IOResult os_sendto_nonb(int fd, const char* buf, unsigned int length, struct sockaddr_native addr; int res, size; assert(0 != buf); - if (count_out) - *count_out = 0; - errno = 0; - size = sockaddr_from_irc(&addr, peer, 1); + size = sockaddr_from_irc(&addr, peer, fd, 0); + assert((addr.sn_family == AF_INET) == irc_in_addr_is_ipv4(&peer->addr)); if (-1 < (res = sendto(fd, buf, length, flags, (struct sockaddr*)&addr, size))) { if (count_out) *count_out = (unsigned) res; return IO_SUCCESS; + } else { + if (count_out) + *count_out = 0; + return is_blocked(errno) ? IO_BLOCKED : IO_FAILURE; } - else if (EWOULDBLOCK == errno || EAGAIN == errno -#ifdef ENOMEM - || ENOMEM == errno -#endif -#ifdef ENOBUFS - || ENOBUFS == errno -#endif - ) - return IO_BLOCKED; - return IO_FAILURE; } -/* - * os_send_nonb - non blocking read of a connection - * returns: - * 1 if data was written - * count_out contains amount written - * - * 0 if write call blocked, recoverable error - * -1 if an unrecoverable error occurred +/** Attempt to write on a connected socket. + * @param[in] fd File descriptor to write to. + * @param[in] buf Output buffer to send from. + * @param[in] length Number of bytes to write. + * @param[out] count_out Receives number of bytes actually written. + * @return An IOResult value indicating status. */ IOResult os_send_nonb(int fd, const char* buf, unsigned int length, unsigned int* count_out) @@ -483,25 +532,23 @@ IOResult os_send_nonb(int fd, const char* buf, unsigned int length, int res; assert(0 != buf); assert(0 != count_out); - *count_out = 0; - errno = 0; if (-1 < (res = send(fd, buf, length, 0))) { *count_out = (unsigned) res; return IO_SUCCESS; + } else { + *count_out = 0; + return is_blocked(errno) ? IO_BLOCKED : IO_FAILURE; } - else if (EWOULDBLOCK == errno || EAGAIN == errno -#ifdef ENOMEM - || ENOMEM == errno -#endif -#ifdef ENOBUFS - || ENOBUFS == errno -#endif - ) - return IO_BLOCKED; - return IO_FAILURE; } +/** Attempt a vectored write on a connected socket. + * @param[in] fd File descriptor to write to. + * @param[in] buf Message queue to send from. + * @param[out] count_in Number of bytes mapped from \a buf. + * @param[out] count_out Receives number of bytes actually written. + * @return An IOResult value indicating status. + */ IOResult os_sendv_nonb(int fd, struct MsgQ* buf, unsigned int* count_in, unsigned int* count_out) { @@ -514,34 +561,31 @@ IOResult os_sendv_nonb(int fd, struct MsgQ* buf, unsigned int* count_in, assert(0 != count_out); *count_in = 0; - *count_out = 0; - errno = 0; - count = msgq_mapiov(buf, iov, IOV_MAX, count_in); if (-1 < (res = writev(fd, iov, count))) { *count_out = (unsigned) res; return IO_SUCCESS; + } else { + *count_out = 0; + return is_blocked(errno) ? IO_BLOCKED : IO_FAILURE; } - else if (EWOULDBLOCK == errno || EAGAIN == errno -#ifdef ENOMEM - || ENOMEM == errno -#endif -#ifdef ENOBUFS - || ENOBUFS == errno -#endif - ) - return IO_BLOCKED; - - return IO_FAILURE; } -int os_socket(const struct irc_sockaddr* local, int type, const char* port_name) +/** Open a TCP or UDP socket on a particular address. + * @param[in] local Local address to bind to. + * @param[in] type SOCK_STREAM or SOCK_DGRAM. + * @param[in] port_name Port name (used in error diagnostics). + * @param[in] family A specific address family to use, or 0 for automatic. + * @return Bound descriptor, or -1 on error. + */ +int os_socket(const struct irc_sockaddr* local, int type, const char* port_name, int family) { struct sockaddr_native addr; int size, fd; - size = sockaddr_from_irc(&addr, local, 1); + assert(local != 0); + size = sockaddr_from_irc(&addr, local, -1, family); fd = socket(addr.sn_family, type, 0); if (fd < 0) { report_error(SOCKET_ERROR_MSG, port_name, errno); @@ -563,6 +607,11 @@ int os_socket(const struct irc_sockaddr* local, int type, const char* port_name) return -1; } if (local) { +#if defined(IPV6_V6ONLY) + int on = 1; + if (family == AF_INET6 && irc_in_addr_unspec(&local->addr)) + setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof(on)); +#endif if (bind(fd, (struct sockaddr*)&addr, size)) { report_error(BIND_ERROR_MSG, port_name, errno); close(fd); @@ -572,6 +621,11 @@ int os_socket(const struct irc_sockaddr* local, int type, const char* port_name) return fd; } +/** Accept a connection on a socket. + * @param[in] fd Listening file descriptor. + * @param[out] peer Peer address of connection. + * @return File descriptor for accepted connection. + */ int os_accept(int fd, struct irc_sockaddr* peer) { struct sockaddr_native addr; @@ -587,17 +641,30 @@ int os_accept(int fd, struct irc_sockaddr* peer) return new_fd; } +/** Start a non-blocking connection. + * @param[in] fd Disconnected file descriptor. + * @param[in] sin Target address for connection. + * @return IOResult code indicating status. + */ IOResult os_connect_nonb(int fd, const struct irc_sockaddr* sin) { struct sockaddr_native addr; int size; - size = sockaddr_from_irc(&addr, sin, 1); - if (connect(fd, (struct sockaddr*) &addr, size)) - return (errno == EINPROGRESS) ? IO_BLOCKED : IO_FAILURE; - return IO_SUCCESS; + size = sockaddr_from_irc(&addr, sin, fd, 0); + if (0 == connect(fd, (struct sockaddr*) &addr, size)) + return IO_SUCCESS; + else if (errno == EINPROGRESS) + return IO_BLOCKED; + else + return IO_FAILURE; } +/** Get local address of a socket. + * @param[in] fd File descriptor to operate on. + * @param[out] sin_out Receives local socket address. + * @return Non-zero on success; zero on error. + */ int os_get_sockname(int fd, struct irc_sockaddr* sin_out) { struct sockaddr_native addr; @@ -610,6 +677,11 @@ int os_get_sockname(int fd, struct irc_sockaddr* sin_out) return 1; } +/** Get remote address of a socket. + * @param[in] fd File descriptor to operate on. + * @param[out] sin_out Receives remote socket address. + * @return Non-zero on success; zero on error. + */ int os_get_peername(int fd, struct irc_sockaddr* sin_out) { struct sockaddr_native addr; @@ -622,7 +694,21 @@ int os_get_peername(int fd, struct irc_sockaddr* sin_out) return 1; } +/** Start listening on a socket. + * @param[in] fd Disconnected file descriptor. + * @param[in] backlog Maximum number of un-accept()ed connections to keep. + * @return Non-zero on success; zero on error. + */ int os_set_listen(int fd, int backlog) { return (0 == listen(fd, backlog)); } + +/** Allocate a connected pair of local sockets. + * @param[out] sv Array of two file descriptors. + * @return Zero on success; non-zero number on error. + */ +int os_socketpair(int sv[2]) +{ + return socketpair(AF_UNIX, SOCK_STREAM, 0, sv); +}