/* $NetBSD: linux_socket.c,v 1.138.6.7 2023/06/21 21:04:02 martin Exp $ */ /*- * Copyright (c) 1995, 1998, 2008 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Frank van der Linden and Eric Haszlakiewicz. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``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 FOUNDATION OR CONTRIBUTORS * 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. */ /* * Functions in multiarch: * linux_sys_socketcall : linux_socketcall.c */ #include __KERNEL_RCSID(0, "$NetBSD: linux_socket.c,v 1.138.6.7 2023/06/21 21:04:02 martin Exp $"); #if defined(_KERNEL_OPT) #include "opt_inet.h" #endif /* defined(_KERNEL_OPT) */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if !defined(__alpha__) && !defined(__amd64__) #include #endif #include #include #include #include #ifdef DEBUG_LINUX #define DPRINTF(a) uprintf a #else #define DPRINTF(a) #endif /* * The calls in this file are entered either via the linux_socketcall() * interface or, on the Alpha, as individual syscalls. The * linux_socketcall function does any massaging of arguments so that all * the calls in here need not think that they are anything other * than a normal syscall. */ static int linux_to_bsd_domain(int); static int bsd_to_linux_domain(int); static int linux_to_bsd_type(int); int linux_to_bsd_sopt_level(int); int linux_to_bsd_so_sockopt(int); int linux_to_bsd_ip_sockopt(int); int linux_to_bsd_ipv6_sockopt(int); int linux_to_bsd_tcp_sockopt(int); int linux_to_bsd_udp_sockopt(int); int linux_getifname(struct lwp *, register_t *, void *); int linux_getifconf(struct lwp *, register_t *, void *); int linux_getifhwaddr(struct lwp *, register_t *, u_int, void *); static int linux_get_sa(struct lwp *, int, struct sockaddr_big *, const struct osockaddr *, socklen_t); static int linux_sa_put(struct osockaddr *osa); static int linux_to_bsd_msg_flags(int); static int bsd_to_linux_msg_flags(int); static void linux_to_bsd_msghdr(const struct linux_msghdr *, struct msghdr *); static void bsd_to_linux_msghdr(const struct msghdr *, struct linux_msghdr *); static const int linux_to_bsd_domain_[LINUX_AF_MAX] = { AF_UNSPEC, AF_UNIX, AF_INET, AF_CCITT, /* LINUX_AF_AX25 */ AF_IPX, AF_APPLETALK, -1, /* LINUX_AF_NETROM */ -1, /* LINUX_AF_BRIDGE */ -1, /* LINUX_AF_ATMPVC */ AF_CCITT, /* LINUX_AF_X25 */ AF_INET6, -1, /* LINUX_AF_ROSE */ AF_DECnet, -1, /* LINUX_AF_NETBEUI */ -1, /* LINUX_AF_SECURITY */ pseudo_AF_KEY, AF_ROUTE, /* LINUX_AF_NETLINK */ -1, /* LINUX_AF_PACKET */ -1, /* LINUX_AF_ASH */ -1, /* LINUX_AF_ECONET */ -1, /* LINUX_AF_ATMSVC */ AF_SNA, /* rest up to LINUX_AF_MAX-1 is not allocated */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, }; static const int bsd_to_linux_domain_[AF_MAX] = { LINUX_AF_UNSPEC, LINUX_AF_UNIX, LINUX_AF_INET, -1, /* AF_IMPLINK */ -1, /* AF_PUP */ -1, /* AF_CHAOS */ -1, /* AF_NS */ -1, /* AF_ISO */ -1, /* AF_ECMA */ -1, /* AF_DATAKIT */ LINUX_AF_AX25, /* AF_CCITT */ LINUX_AF_SNA, LINUX_AF_DECnet, -1, /* AF_DLI */ -1, /* AF_LAT */ -1, /* AF_HYLINK */ LINUX_AF_APPLETALK, LINUX_AF_NETLINK, -1, /* AF_LINK */ -1, /* AF_XTP */ -1, /* AF_COIP */ -1, /* AF_CNT */ -1, /* pseudo_AF_RTIP */ LINUX_AF_IPX, LINUX_AF_INET6, -1, /* pseudo_AF_PIP */ -1, /* AF_ISDN */ -1, /* AF_NATM */ -1, /* AF_ARP */ LINUX_pseudo_AF_KEY, -1, /* pseudo_AF_HDRCMPLT */ }; static const struct { int bfl; int lfl; } bsd_to_linux_msg_flags_[] = { {MSG_OOB, LINUX_MSG_OOB}, {MSG_PEEK, LINUX_MSG_PEEK}, {MSG_DONTROUTE, LINUX_MSG_DONTROUTE}, {MSG_EOR, LINUX_MSG_EOR}, {MSG_TRUNC, LINUX_MSG_TRUNC}, {MSG_CTRUNC, LINUX_MSG_CTRUNC}, {MSG_WAITALL, LINUX_MSG_WAITALL}, {MSG_DONTWAIT, LINUX_MSG_DONTWAIT}, {MSG_BCAST, 0}, /* not supported, clear */ {MSG_MCAST, 0}, /* not supported, clear */ {MSG_NOSIGNAL, LINUX_MSG_NOSIGNAL}, {-1, /* not supp */ LINUX_MSG_PROBE}, {-1, /* not supp */ LINUX_MSG_FIN}, {-1, /* not supp */ LINUX_MSG_SYN}, {-1, /* not supp */ LINUX_MSG_CONFIRM}, {-1, /* not supp */ LINUX_MSG_RST}, {-1, /* not supp */ LINUX_MSG_ERRQUEUE}, {-1, /* not supp */ LINUX_MSG_MORE}, }; /* * Convert between Linux and BSD socket domain values */ static int linux_to_bsd_domain(int ldom) { if (ldom < 0 || ldom >= LINUX_AF_MAX) return (-1); return linux_to_bsd_domain_[ldom]; } /* * Convert between BSD and Linux socket domain values */ static int bsd_to_linux_domain(int bdom) { if (bdom < 0 || bdom >= AF_MAX) return (-1); return bsd_to_linux_domain_[bdom]; } static int linux_to_bsd_type(int ltype) { int type, flags; /* Real types are identical between Linux and NetBSD */ type = ltype & LINUX_SOCK_TYPE_MASK; /* But flags are not .. */ flags = ltype & ~LINUX_SOCK_TYPE_MASK; if (flags & ~(LINUX_SOCK_CLOEXEC|LINUX_SOCK_NONBLOCK)) return -1; if (flags & LINUX_SOCK_CLOEXEC) type |= SOCK_CLOEXEC; if (flags & LINUX_SOCK_NONBLOCK) type |= SOCK_NONBLOCK; return type; } static int linux_to_bsd_msg_flags(int lflag) { int i, lfl, bfl; int bflag = 0; if (lflag == 0) return (0); for(i = 0; i < __arraycount(bsd_to_linux_msg_flags_); i++) { bfl = bsd_to_linux_msg_flags_[i].bfl; lfl = bsd_to_linux_msg_flags_[i].lfl; if (lfl == 0) continue; if (lflag & lfl) { if (bfl < 0) return (-1); bflag |= bfl; } } return (bflag); } static int bsd_to_linux_msg_flags(int bflag) { int i, lfl, bfl; int lflag = 0; if (bflag == 0) return (0); for(i = 0; i < __arraycount(bsd_to_linux_msg_flags_); i++) { bfl = bsd_to_linux_msg_flags_[i].bfl; lfl = bsd_to_linux_msg_flags_[i].lfl; if (bfl <= 0) continue; if (bflag & bfl) { if (lfl < 0) return (-1); lflag |= lfl; } } return (lflag); } int linux_sys_socket(struct lwp *l, const struct linux_sys_socket_args *uap, register_t *retval) { /* { syscallarg(int) domain; syscallarg(int) type; syscallarg(int) protocol; } */ struct sys___socket30_args bsa; int error; SCARG(&bsa, protocol) = SCARG(uap, protocol); SCARG(&bsa, domain) = linux_to_bsd_domain(SCARG(uap, domain)); if (SCARG(&bsa, domain) == -1) return EINVAL; SCARG(&bsa, type) = linux_to_bsd_type(SCARG(uap, type)); if (SCARG(&bsa, type) == -1) return EINVAL; /* * Apparently linux uses this to talk to ISDN sockets. If we fail * now programs seems to handle it, but if we don't we are going * to fail when we bind and programs don't handle this well. */ if (SCARG(&bsa, domain) == AF_ROUTE && SCARG(&bsa, type) == SOCK_RAW) return ENOTSUP; error = sys___socket30(l, &bsa, retval); #ifdef INET6 /* * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by * default and some apps depend on this. So, set V6ONLY to 0 * for Linux apps if the sysctl value is set to 1. */ if (!error && ip6_v6only && SCARG(&bsa, domain) == PF_INET6) { struct socket *so; if (fd_getsock(*retval, &so) == 0) { int val = 0; /* ignore error */ (void)so_setsockopt(l, so, IPPROTO_IPV6, IPV6_V6ONLY, &val, sizeof(val)); fd_putfile(*retval); } } #endif return (error); } int linux_sys_socketpair(struct lwp *l, const struct linux_sys_socketpair_args *uap, register_t *retval) { /* { syscallarg(int) domain; syscallarg(int) type; syscallarg(int) protocol; syscallarg(int *) rsv; } */ struct sys_socketpair_args bsa; SCARG(&bsa, domain) = linux_to_bsd_domain(SCARG(uap, domain)); if (SCARG(&bsa, domain) == -1) return EINVAL; SCARG(&bsa, type) = linux_to_bsd_type(SCARG(uap, type)); if (SCARG(&bsa, type) == -1) return EINVAL; SCARG(&bsa, protocol) = SCARG(uap, protocol); SCARG(&bsa, rsv) = SCARG(uap, rsv); return sys_socketpair(l, &bsa, retval); } int linux_sys_sendto(struct lwp *l, const struct linux_sys_sendto_args *uap, register_t *retval) { /* { syscallarg(int) s; syscallarg(void *) msg; syscallarg(int) len; syscallarg(int) flags; syscallarg(struct osockaddr *) to; syscallarg(int) tolen; } */ struct msghdr msg; struct iovec aiov; struct sockaddr_big nam; struct mbuf *m; int bflags; int error; /* Translate message flags. */ bflags = linux_to_bsd_msg_flags(SCARG(uap, flags)); if (bflags < 0) /* Some supported flag */ return EINVAL; msg.msg_flags = 0; msg.msg_name = NULL; msg.msg_control = NULL; if (SCARG(uap, tolen)) { size_t solen; /* Read in and convert the sockaddr */ error = linux_get_sa(l, SCARG(uap, s), &nam, SCARG(uap, to), SCARG(uap, tolen)); if (error) return (error); /* * XXX * Copy sockaddr_big to mbuf because sockargs() called from * do_sys_sendmsg_so() can't handle sockaddr in msg_name * already copied into the kernel space. */ solen = nam.sb_len; m = m_get(M_WAIT, MT_SONAME); if (solen > MLEN) { MEXTMALLOC(m, solen, M_WAITOK); } m->m_len = solen; memcpy(mtod(m, void *), &nam, solen); msg.msg_flags |= MSG_NAMEMBUF; msg.msg_name = m; msg.msg_namelen = solen; } msg.msg_iov = &aiov; msg.msg_iovlen = 1; aiov.iov_base = __UNCONST(SCARG(uap, msg)); aiov.iov_len = SCARG(uap, len); return do_sys_sendmsg(l, SCARG(uap, s), &msg, bflags, NULL, 0, retval); } static void linux_to_bsd_msghdr(const struct linux_msghdr *lmsg, struct msghdr *bmsg) { memset(bmsg, 0, sizeof(*bmsg)); bmsg->msg_name = lmsg->msg_name; bmsg->msg_namelen = lmsg->msg_namelen; bmsg->msg_iov = lmsg->msg_iov; bmsg->msg_iovlen = lmsg->msg_iovlen; bmsg->msg_control = lmsg->msg_control; bmsg->msg_controllen = lmsg->msg_controllen; bmsg->msg_flags = lmsg->msg_flags; } static void bsd_to_linux_msghdr(const struct msghdr *bmsg, struct linux_msghdr *lmsg) { memset(lmsg, 0, sizeof(*lmsg)); lmsg->msg_name = bmsg->msg_name; lmsg->msg_namelen = bmsg->msg_namelen; lmsg->msg_iov = bmsg->msg_iov; lmsg->msg_iovlen = bmsg->msg_iovlen; lmsg->msg_control = bmsg->msg_control; lmsg->msg_controllen = bmsg->msg_controllen; lmsg->msg_flags = bmsg->msg_flags; } int linux_sys_sendmsg(struct lwp *l, const struct linux_sys_sendmsg_args *uap, register_t *retval) { /* { syscallarg(int) s; syscallarg(struct linux_msghdr *) msg; syscallarg(u_int) flags; } */ struct msghdr msg; struct linux_msghdr lmsg; int error; int bflags; struct sockaddr_big nam; u_int8_t *control; struct mbuf *ctl_mbuf = NULL; error = copyin(SCARG(uap, msg), &lmsg, sizeof(lmsg)); if (error) return error; linux_to_bsd_msghdr(&lmsg, &msg); msg.msg_flags = MSG_IOVUSRSPACE; /* * Translate message flags. */ bflags = linux_to_bsd_msg_flags(SCARG(uap, flags)); if (bflags < 0) /* Some supported flag */ return EINVAL; if (lmsg.msg_name) { /* Read in and convert the sockaddr */ error = linux_get_sa(l, SCARG(uap, s), &nam, msg.msg_name, msg.msg_namelen); if (error) return (error); msg.msg_name = &nam; } /* * Handle cmsg if there is any. */ if (LINUX_CMSG_FIRSTHDR(&lmsg)) { struct linux_cmsghdr l_cmsg, *l_cc; struct cmsghdr *cmsg; ssize_t resid = msg.msg_controllen; size_t clen, cidx = 0, cspace; ctl_mbuf = m_get(M_WAIT, MT_CONTROL); clen = MLEN; control = mtod(ctl_mbuf, void *); l_cc = LINUX_CMSG_FIRSTHDR(&lmsg); do { error = copyin(l_cc, &l_cmsg, sizeof(l_cmsg)); if (error) goto done; /* * Sanity check the control message length. */ if (l_cmsg.cmsg_len > resid || l_cmsg.cmsg_len < sizeof l_cmsg) { error = EINVAL; goto done; } /* * Refuse unsupported control messages, and * translate fields as appropriate. */ switch (l_cmsg.cmsg_level) { case LINUX_SOL_SOCKET: /* It only differs on some archs */ if (LINUX_SOL_SOCKET != SOL_SOCKET) l_cmsg.cmsg_level = SOL_SOCKET; switch(l_cmsg.cmsg_type) { case LINUX_SCM_RIGHTS: /* Linux SCM_RIGHTS is same as NetBSD */ break; case LINUX_SCM_CREDENTIALS: /* no native equivalent, just drop it */ if (control != mtod(ctl_mbuf, void *)) free(control, M_MBUF); m_free(ctl_mbuf); ctl_mbuf = NULL; msg.msg_control = NULL; msg.msg_controllen = 0; goto skipcmsg; default: /* other types not supported */ error = EINVAL; goto done; } break; default: /* pray and leave intact */ break; } cspace = CMSG_SPACE(l_cmsg.cmsg_len - sizeof(l_cmsg)); /* Check the buffer is big enough */ if (__predict_false(cidx + cspace > clen)) { u_int8_t *nc; size_t nclen; nclen = cidx + cspace; if (nclen >= PAGE_SIZE) { error = EINVAL; goto done; } nc = realloc(clen <= MLEN ? NULL : control, nclen, M_TEMP, M_WAITOK); if (!nc) { error = ENOMEM; goto done; } if (cidx <= MLEN) /* Old buffer was in mbuf... */ memcpy(nc, control, cidx); control = nc; clen = nclen; } /* Copy header */ cmsg = (void *)&control[cidx]; cmsg->cmsg_len = l_cmsg.cmsg_len + LINUX_CMSG_ALIGN_DELTA; cmsg->cmsg_level = l_cmsg.cmsg_level; cmsg->cmsg_type = l_cmsg.cmsg_type; /* Zero area between header and data */ memset(cmsg + 1, 0, CMSG_ALIGN(sizeof(*cmsg)) - sizeof(*cmsg)); /* Copyin the data */ error = copyin(LINUX_CMSG_DATA(l_cc), CMSG_DATA(cmsg), l_cmsg.cmsg_len - sizeof(l_cmsg)); if (error) goto done; resid -= LINUX_CMSG_ALIGN(l_cmsg.cmsg_len); cidx += cspace; } while ((l_cc = LINUX_CMSG_NXTHDR(&msg, l_cc, &l_cmsg)) && resid > 0); /* If we allocated a buffer, attach to mbuf */ if (cidx > MLEN) { MEXTADD(ctl_mbuf, control, clen, M_MBUF, NULL, NULL); ctl_mbuf->m_flags |= M_EXT_RW; } control = NULL; ctl_mbuf->m_len = cidx; msg.msg_control = ctl_mbuf; msg.msg_flags |= MSG_CONTROLMBUF; ktrkuser("mbcontrol", mtod(ctl_mbuf, void *), msg.msg_controllen); } skipcmsg: error = do_sys_sendmsg(l, SCARG(uap, s), &msg, bflags, NULL, 0, retval); /* Freed internally */ ctl_mbuf = NULL; done: if (ctl_mbuf != NULL) { if (control != NULL && control != mtod(ctl_mbuf, void *)) free(control, M_MBUF); m_free(ctl_mbuf); } return (error); } int linux_sys_recvfrom(struct lwp *l, const struct linux_sys_recvfrom_args *uap, register_t *retval) { /* { syscallarg(int) s; syscallarg(void *) buf; syscallarg(int) len; syscallarg(int) flags; syscallarg(struct osockaddr *) from; syscallarg(int *) fromlenaddr; } */ int error; struct sys_recvfrom_args bra; SCARG(&bra, s) = SCARG(uap, s); SCARG(&bra, buf) = SCARG(uap, buf); SCARG(&bra, len) = SCARG(uap, len); SCARG(&bra, flags) = SCARG(uap, flags); SCARG(&bra, from) = (struct sockaddr *) SCARG(uap, from); SCARG(&bra, fromlenaddr) = (socklen_t *)SCARG(uap, fromlenaddr); if ((error = sys_recvfrom(l, &bra, retval))) return (error); if (SCARG(uap, from) && (error = linux_sa_put(SCARG(uap, from)))) return (error); return (0); } static int linux_copyout_msg_control(struct lwp *l, struct msghdr *mp, struct mbuf *control) { int dlen, error = 0; struct cmsghdr *cmsg; struct linux_cmsghdr linux_cmsg; struct mbuf *m; char *q, *q_end; if (mp->msg_controllen <= 0 || control == 0) { mp->msg_controllen = 0; free_control_mbuf(l, control, control); return 0; } ktrkuser("msgcontrol", mtod(control, void *), mp->msg_controllen); q = (char *)mp->msg_control; q_end = q + mp->msg_controllen; for (m = control; m != NULL; ) { cmsg = mtod(m, struct cmsghdr *); /* * Fixup cmsg. We handle two things: * 0. different sizeof cmsg_len. * 1. different values for level/type on some archs * 2. different alignment of CMSG_DATA on some archs */ memset(&linux_cmsg, 0, sizeof(linux_cmsg)); linux_cmsg.cmsg_len = cmsg->cmsg_len - LINUX_CMSG_ALIGN_DELTA; linux_cmsg.cmsg_level = cmsg->cmsg_level; linux_cmsg.cmsg_type = cmsg->cmsg_type; dlen = q_end - q; if (linux_cmsg.cmsg_len > dlen) { /* Not enough room for the parameter */ dlen -= sizeof linux_cmsg; if (dlen <= 0) /* Discard if header wont fit */ break; mp->msg_flags |= MSG_CTRUNC; if (linux_cmsg.cmsg_level == SOL_SOCKET && linux_cmsg.cmsg_type == SCM_RIGHTS) /* Do not truncate me ... */ break; } else dlen = linux_cmsg.cmsg_len - sizeof linux_cmsg; switch (linux_cmsg.cmsg_level) { case SOL_SOCKET: linux_cmsg.cmsg_level = LINUX_SOL_SOCKET; switch (linux_cmsg.cmsg_type) { case SCM_RIGHTS: /* Linux SCM_RIGHTS is same as NetBSD */ break; default: /* other types not supported */ error = EINVAL; goto done; } /* machine dependent ! */ break; default: /* pray and leave intact */ break; } /* There can be padding between the header and data... */ error = copyout(&linux_cmsg, q, sizeof linux_cmsg); if (error != 0) { error = copyout(CCMSG_DATA(cmsg), q + sizeof linux_cmsg, dlen); } if (error != 0) { /* We must free all the SCM_RIGHTS */ m = control; break; } m = m->m_next; if (m == NULL || q + LINUX_CMSG_SPACE(dlen) > q_end) { q += LINUX_CMSG_LEN(dlen); break; } q += LINUX_CMSG_SPACE(dlen); } done: free_control_mbuf(l, control, m); mp->msg_controllen = q - (char *)mp->msg_control; return error; } int linux_sys_recvmsg(struct lwp *l, const struct linux_sys_recvmsg_args *uap, register_t *retval) { /* { syscallarg(int) s; syscallarg(struct linux_msghdr *) msg; syscallarg(u_int) flags; } */ struct msghdr msg; struct linux_msghdr lmsg; int error; struct mbuf *from, *control; error = copyin(SCARG(uap, msg), &lmsg, sizeof(lmsg)); if (error) return (error); linux_to_bsd_msghdr(&lmsg, &msg); msg.msg_flags = linux_to_bsd_msg_flags(SCARG(uap, flags)); if (msg.msg_flags < 0) { /* Some unsupported flag */ return (EINVAL); } msg.msg_flags |= MSG_IOVUSRSPACE; error = do_sys_recvmsg(l, SCARG(uap, s), &msg, NULL, 0, &from, msg.msg_control != NULL ? &control : NULL, retval); if (error != 0) return error; if (msg.msg_control != NULL) error = linux_copyout_msg_control(l, &msg, control); if (error == 0 && from != 0) { mtod(from, struct osockaddr *)->sa_family = bsd_to_linux_domain(mtod(from, struct sockaddr *)->sa_family); error = copyout_sockname(msg.msg_name, &msg.msg_namelen, 0, from); } else msg.msg_namelen = 0; if (from != NULL) m_free(from); if (error == 0) { msg.msg_flags = bsd_to_linux_msg_flags(msg.msg_flags); if (msg.msg_flags < 0) /* Some flag unsupported by Linux */ error = EINVAL; else { ktrkuser("msghdr", &msg, sizeof(msg)); bsd_to_linux_msghdr(&msg, &lmsg); error = copyout(&lmsg, SCARG(uap, msg), sizeof(lmsg)); } } return (error); } /* * Convert socket option level from Linux to NetBSD value. Only SOL_SOCKET * is different, the rest matches IPPROTO_* on both systems. */ int linux_to_bsd_sopt_level(int llevel) { switch (llevel) { case LINUX_SOL_SOCKET: return SOL_SOCKET; case LINUX_SOL_IP: return IPPROTO_IP; #ifdef INET6 case LINUX_SOL_IPV6: return IPPROTO_IPV6; #endif case LINUX_SOL_TCP: return IPPROTO_TCP; case LINUX_SOL_UDP: return IPPROTO_UDP; default: return -1; } } /* * Convert Linux socket level socket option numbers to NetBSD values. */ int linux_to_bsd_so_sockopt(int lopt) { switch (lopt) { case LINUX_SO_DEBUG: return SO_DEBUG; case LINUX_SO_REUSEADDR: /* * Linux does not implement SO_REUSEPORT, but allows reuse of a * host:port pair through SO_REUSEADDR even if the address is not a * multicast-address. Effectively, this means that we should use * SO_REUSEPORT to allow Linux applications to not exit with * EADDRINUSE */ return SO_REUSEPORT; case LINUX_SO_TYPE: return SO_TYPE; case LINUX_SO_ERROR: return SO_ERROR; case LINUX_SO_DONTROUTE: return SO_DONTROUTE; case LINUX_SO_BROADCAST: return SO_BROADCAST; case LINUX_SO_SNDBUF: return SO_SNDBUF; case LINUX_SO_RCVBUF: return SO_RCVBUF; case LINUX_SO_SNDLOWAT: return SO_SNDLOWAT; case LINUX_SO_RCVLOWAT: return SO_RCVLOWAT; case LINUX_SO_KEEPALIVE: return SO_KEEPALIVE; case LINUX_SO_OOBINLINE: return SO_OOBINLINE; case LINUX_SO_LINGER: return SO_LINGER; case LINUX_SO_ACCEPTCONN: return SO_ACCEPTCONN; case LINUX_SO_PRIORITY: case LINUX_SO_NO_CHECK: default: return -1; } } /* * Convert Linux IP level socket option number to NetBSD values. */ int linux_to_bsd_ip_sockopt(int lopt) { switch (lopt) { case LINUX_IP_TOS: return IP_TOS; case LINUX_IP_TTL: return IP_TTL; case LINUX_IP_HDRINCL: return IP_HDRINCL; case LINUX_IP_MULTICAST_TTL: return IP_MULTICAST_TTL; case LINUX_IP_MULTICAST_LOOP: return IP_MULTICAST_LOOP; case LINUX_IP_MULTICAST_IF: return IP_MULTICAST_IF; case LINUX_IP_ADD_MEMBERSHIP: return IP_ADD_MEMBERSHIP; case LINUX_IP_DROP_MEMBERSHIP: return IP_DROP_MEMBERSHIP; default: return -1; } } /* * Convert Linux IPV6 level socket option number to NetBSD values. */ #ifdef INET6 int linux_to_bsd_ipv6_sockopt(int lopt) { switch (lopt) { case LINUX_IPV6_V6ONLY: return IPV6_V6ONLY; default: return -1; } } #endif /* * Convert Linux TCP level socket option number to NetBSD values. */ int linux_to_bsd_tcp_sockopt(int lopt) { switch (lopt) { case LINUX_TCP_NODELAY: return TCP_NODELAY; case LINUX_TCP_MAXSEG: return TCP_MAXSEG; default: return -1; } } /* * Convert Linux UDP level socket option number to NetBSD values. */ int linux_to_bsd_udp_sockopt(int lopt) { switch (lopt) { default: return -1; } } /* * Another reasonably straightforward function: setsockopt(2). * The level and option numbers are converted; the values passed * are not (yet) converted, the ones currently implemented don't * need conversion, as they are the same on both systems. */ int linux_sys_setsockopt(struct lwp *l, const struct linux_sys_setsockopt_args *uap, register_t *retval) { /* { syscallarg(int) s; syscallarg(int) level; syscallarg(int) optname; syscallarg(void *) optval; syscallarg(int) optlen; } */ struct sys_setsockopt_args bsa; int name; SCARG(&bsa, s) = SCARG(uap, s); SCARG(&bsa, level) = linux_to_bsd_sopt_level(SCARG(uap, level)); SCARG(&bsa, val) = SCARG(uap, optval); SCARG(&bsa, valsize) = SCARG(uap, optlen); /* * Linux supports only SOL_SOCKET for AF_LOCAL domain sockets * and returns EOPNOTSUPP for other levels */ if (SCARG(&bsa, level) != SOL_SOCKET) { struct socket *so; int error, family; /* fd_getsock() will use the descriptor for us */ if ((error = fd_getsock(SCARG(&bsa, s), &so)) != 0) return error; family = so->so_proto->pr_domain->dom_family; fd_putfile(SCARG(&bsa, s)); if (family == AF_LOCAL) return EOPNOTSUPP; } switch (SCARG(&bsa, level)) { case SOL_SOCKET: name = linux_to_bsd_so_sockopt(SCARG(uap, optname)); break; case IPPROTO_IP: name = linux_to_bsd_ip_sockopt(SCARG(uap, optname)); break; #ifdef INET6 case IPPROTO_IPV6: name = linux_to_bsd_ipv6_sockopt(SCARG(uap, optname)); break; #endif case IPPROTO_TCP: name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname)); break; case IPPROTO_UDP: name = linux_to_bsd_udp_sockopt(SCARG(uap, optname)); break; default: return EINVAL; } if (name == -1) return EINVAL; SCARG(&bsa, name) = name; return sys_setsockopt(l, &bsa, retval); } /* * getsockopt(2) is very much the same as setsockopt(2) (see above) */ int linux_sys_getsockopt(struct lwp *l, const struct linux_sys_getsockopt_args *uap, register_t *retval) { /* { syscallarg(int) s; syscallarg(int) level; syscallarg(int) optname; syscallarg(void *) optval; syscallarg(int *) optlen; } */ struct sys_getsockopt_args bga; int name; SCARG(&bga, s) = SCARG(uap, s); SCARG(&bga, level) = linux_to_bsd_sopt_level(SCARG(uap, level)); SCARG(&bga, val) = SCARG(uap, optval); SCARG(&bga, avalsize) = (socklen_t *)SCARG(uap, optlen); switch (SCARG(&bga, level)) { case SOL_SOCKET: name = linux_to_bsd_so_sockopt(SCARG(uap, optname)); break; case IPPROTO_IP: name = linux_to_bsd_ip_sockopt(SCARG(uap, optname)); break; #ifdef INET6 case IPPROTO_IPV6: name = linux_to_bsd_ipv6_sockopt(SCARG(uap, optname)); break; #endif case IPPROTO_TCP: name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname)); break; case IPPROTO_UDP: name = linux_to_bsd_udp_sockopt(SCARG(uap, optname)); break; default: return EINVAL; } if (name == -1) return EINVAL; SCARG(&bga, name) = name; return sys_getsockopt(l, &bga, retval); } int linux_getifname(struct lwp *l, register_t *retval, void *data) { struct ifnet *ifp; struct linux_ifreq ifr; int error; int s; error = copyin(data, &ifr, sizeof(ifr)); if (error) return error; s = pserialize_read_enter(); ifp = if_byindex(ifr.ifr_ifru.ifru_ifindex); if (ifp == NULL) { pserialize_read_exit(s); return ENODEV; } strncpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)); pserialize_read_exit(s); return copyout(&ifr, data, sizeof(ifr)); } int linux_getifconf(struct lwp *l, register_t *retval, void *data) { struct linux_ifreq ifr, *ifrp = NULL; struct linux_ifconf ifc; struct ifnet *ifp; struct sockaddr *sa; struct osockaddr *osa; int space = 0, error; const int sz = (int)sizeof(ifr); bool docopy; int s; int bound; struct psref psref; error = copyin(data, &ifc, sizeof(ifc)); if (error) return error; docopy = ifc.ifc_req != NULL; if (docopy) { if (ifc.ifc_len < 0) return EINVAL; space = ifc.ifc_len; ifrp = ifc.ifc_req; } memset(&ifr, 0, sizeof(ifr)); bound = curlwp_bind(); s = pserialize_read_enter(); IFNET_READER_FOREACH(ifp) { struct ifaddr *ifa; if_acquire(ifp, &psref); pserialize_read_exit(s); (void)strncpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)); if (ifr.ifr_name[sizeof(ifr.ifr_name) - 1] != '\0') { error = ENAMETOOLONG; goto release_exit; } s = pserialize_read_enter(); IFADDR_READER_FOREACH(ifa, ifp) { struct psref psref_ifa; ifa_acquire(ifa, &psref_ifa); pserialize_read_exit(s); sa = ifa->ifa_addr; if (sa->sa_family != AF_INET || sa->sa_len > sizeof(*osa)) goto next; memcpy(&ifr.ifr_addr, sa, sa->sa_len); osa = (struct osockaddr *)&ifr.ifr_addr; osa->sa_family = sa->sa_family; if (space >= sz) { error = copyout(&ifr, ifrp, sz); if (error != 0) { ifa_release(ifa, &psref_ifa); goto release_exit; } ifrp++; } space -= sz; next: s = pserialize_read_enter(); ifa_release(ifa, &psref_ifa); } KASSERT(pserialize_in_read_section()); if_release(ifp, &psref); } pserialize_read_exit(s); curlwp_bindx(bound); if (docopy) ifc.ifc_len -= space; else ifc.ifc_len = -space; return copyout(&ifc, data, sizeof(ifc)); release_exit: if_release(ifp, &psref); curlwp_bindx(bound); return error; } int linux_getifhwaddr(struct lwp *l, register_t *retval, u_int fd, void *data) { /* Not the full structure, just enough to map what we do here */ struct linux_ifreq lreq; file_t *fp; struct ifaddr *ifa; struct ifnet *ifp; struct sockaddr_dl *sadl; int error, found; int index, ifnum; int s; /* * We can't emulate this ioctl by calling sys_ioctl() to run * SIOCGIFCONF, because the user buffer is not of the right * type to take those results. We can't use kernel buffers to * receive the results, as the implementation of sys_ioctl() * and ifconf() [which implements SIOCGIFCONF] use * copyin()/copyout() which will fail on kernel addresses. * * So, we must duplicate code from sys_ioctl() and ifconf(). Ugh. */ if ((fp = fd_getfile(fd)) == NULL) return (EBADF); KERNEL_LOCK(1, NULL); if ((fp->f_flag & (FREAD | FWRITE)) == 0) { error = EBADF; goto out; } error = copyin(data, &lreq, sizeof(lreq)); if (error) goto out; lreq.ifr_name[LINUX_IFNAMSIZ-1] = '\0'; /* just in case */ /* * Try real interface name first, then fake "ethX" */ found = 0; s = pserialize_read_enter(); IFNET_READER_FOREACH(ifp) { if (found) break; if (strcmp(lreq.ifr_name, ifp->if_xname)) /* not this interface */ continue; found=1; if (IFADDR_READER_EMPTY(ifp)) { pserialize_read_exit(s); error = ENODEV; goto out; } IFADDR_READER_FOREACH(ifa, ifp) { sadl = satosdl(ifa->ifa_addr); /* only return ethernet addresses */ /* XXX what about FDDI, etc. ? */ if (sadl->sdl_family != AF_LINK || sadl->sdl_type != IFT_ETHER) continue; memcpy(&lreq.ifr_hwaddr.sa_data, CLLADDR(sadl), MIN(sadl->sdl_alen, sizeof(lreq.ifr_hwaddr.sa_data))); lreq.ifr_hwaddr.sa_family = sadl->sdl_family; pserialize_read_exit(s); error = copyout(&lreq, data, sizeof(lreq)); goto out; } } pserialize_read_exit(s); if (strncmp(lreq.ifr_name, "eth", 3) != 0) { /* unknown interface, not even an "eth*" name */ error = ENODEV; goto out; } for (ifnum = 0, index = 3; index < LINUX_IFNAMSIZ && lreq.ifr_name[index] != '\0'; index++) { ifnum *= 10; ifnum += lreq.ifr_name[index] - '0'; } error = EINVAL; /* in case we don't find one */ s = pserialize_read_enter(); IFNET_READER_FOREACH(ifp) { memcpy(lreq.ifr_name, ifp->if_xname, MIN(LINUX_IFNAMSIZ, IFNAMSIZ)); IFADDR_READER_FOREACH(ifa, ifp) { sadl = satosdl(ifa->ifa_addr); /* only return ethernet addresses */ /* XXX what about FDDI, etc. ? */ if (sadl->sdl_family != AF_LINK || sadl->sdl_type != IFT_ETHER) continue; if (ifnum--) /* not the reqested iface */ continue; memcpy(&lreq.ifr_hwaddr.sa_data, CLLADDR(sadl), MIN(sadl->sdl_alen, sizeof(lreq.ifr_hwaddr.sa_data))); lreq.ifr_hwaddr.sa_family = sadl->sdl_family; pserialize_read_exit(s); error = copyout(&lreq, data, sizeof(lreq)); goto out; } } pserialize_read_exit(s); out: KERNEL_UNLOCK_ONE(NULL); fd_putfile(fd); return error; } int linux_ioctl_socket(struct lwp *l, const struct linux_sys_ioctl_args *uap, register_t *retval) { /* { syscallarg(int) fd; syscallarg(u_long) com; syscallarg(void *) data; } */ u_long com; int error = 0, isdev = 0, dosys = 1; struct sys_ioctl_args ia; file_t *fp; struct vnode *vp; int (*ioctlf)(file_t *, u_long, void *); struct ioctl_pt pt; if ((fp = fd_getfile(SCARG(uap, fd))) == NULL) return (EBADF); if (fp->f_type == DTYPE_VNODE) { vp = (struct vnode *)fp->f_data; isdev = vp->v_type == VCHR; } /* * Don't try to interpret socket ioctl calls that are done * on a device filedescriptor, just pass them through, to * emulate Linux behaviour. Use PTIOCLINUX so that the * device will only handle these if it's prepared to do * so, to avoid unexpected things from happening. */ if (isdev) { dosys = 0; ioctlf = fp->f_ops->fo_ioctl; pt.com = SCARG(uap, com); pt.data = SCARG(uap, data); error = ioctlf(fp, PTIOCLINUX, &pt); /* * XXX hack: if the function returns EJUSTRETURN, * it has stuffed a sysctl return value in pt.data. */ if (error == EJUSTRETURN) { retval[0] = (register_t)pt.data; error = 0; } goto out; } com = SCARG(uap, com); retval[0] = 0; switch (com) { case LINUX_SIOCGIFNAME: error = linux_getifname(l, retval, SCARG(uap, data)); dosys = 0; break; case LINUX_SIOCGIFCONF: error = linux_getifconf(l, retval, SCARG(uap, data)); dosys = 0; break; case LINUX_SIOCGIFFLAGS: SCARG(&ia, com) = OSIOCGIFFLAGS; break; case LINUX_SIOCSIFFLAGS: SCARG(&ia, com) = OSIOCSIFFLAGS; break; case LINUX_SIOCGIFADDR: SCARG(&ia, com) = OOSIOCGIFADDR; break; case LINUX_SIOCGIFDSTADDR: SCARG(&ia, com) = OOSIOCGIFDSTADDR; break; case LINUX_SIOCGIFBRDADDR: SCARG(&ia, com) = OOSIOCGIFBRDADDR; break; case LINUX_SIOCGIFNETMASK: SCARG(&ia, com) = OOSIOCGIFNETMASK; break; case LINUX_SIOCGIFMTU: SCARG(&ia, com) = OSIOCGIFMTU; break; case LINUX_SIOCADDMULTI: SCARG(&ia, com) = OSIOCADDMULTI; break; case LINUX_SIOCDELMULTI: SCARG(&ia, com) = OSIOCDELMULTI; break; case LINUX_SIOCGIFHWADDR: error = linux_getifhwaddr(l, retval, SCARG(uap, fd), SCARG(uap, data)); dosys = 0; break; default: error = EINVAL; } out: fd_putfile(SCARG(uap, fd)); if (error ==0 && dosys) { SCARG(&ia, fd) = SCARG(uap, fd); SCARG(&ia, data) = SCARG(uap, data); error = sys_ioctl(curlwp, &ia, retval); } return error; } int linux_sys_connect(struct lwp *l, const struct linux_sys_connect_args *uap, register_t *retval) { /* { syscallarg(int) s; syscallarg(const struct sockaddr *) name; syscallarg(int) namelen; } */ int error; struct sockaddr_big sb; error = linux_get_sa(l, SCARG(uap, s), &sb, SCARG(uap, name), SCARG(uap, namelen)); if (error) return (error); error = do_sys_connect(l, SCARG(uap, s), (struct sockaddr *)&sb); if (error == EISCONN) { struct socket *so; int state, prflags; /* fd_getsock() will use the descriptor for us */ if (fd_getsock(SCARG(uap, s), &so) != 0) return EISCONN; solock(so); state = so->so_state; prflags = so->so_proto->pr_flags; sounlock(so); fd_putfile(SCARG(uap, s)); /* * We should only let this call succeed once per * non-blocking connect; however we don't have * a convenient place to keep that state.. */ if ((state & (SS_ISCONNECTED|SS_NBIO)) == (SS_ISCONNECTED|SS_NBIO) && (prflags & PR_CONNREQUIRED)) return 0; } return (error); } int linux_sys_bind(struct lwp *l, const struct linux_sys_bind_args *uap, register_t *retval) { /* { syscallarg(int) s; syscallarg(const struct osockaddr *) name; syscallarg(int) namelen; } */ int error; struct sockaddr_big sb; error = linux_get_sa(l, SCARG(uap, s), &sb, SCARG(uap, name), SCARG(uap, namelen)); if (error) return (error); return do_sys_bind(l, SCARG(uap, s), (struct sockaddr *)&sb); } int linux_sys_getsockname(struct lwp *l, const struct linux_sys_getsockname_args *uap, register_t *retval) { /* { syscallarg(int) fdes; syscallarg(void *) asa; syscallarg(int *) alen; } */ int error; if ((error = sys_getsockname(l, (const void *)uap, retval)) != 0) return (error); if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa)))) return (error); return (0); } int linux_sys_getpeername(struct lwp *l, const struct linux_sys_getpeername_args *uap, register_t *retval) { /* { syscallarg(int) fdes; syscallarg(void *) asa; syscallarg(int *) alen; } */ int error; if ((error = sys_getpeername(l, (const void *)uap, retval)) != 0) return (error); if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa)))) return (error); return (0); } /* * Copy the osockaddr structure pointed to by name to sb, adjust * family and convert to sockaddr. */ static int linux_get_sa(struct lwp *l, int s, struct sockaddr_big *sb, const struct osockaddr *name, socklen_t namelen) { int error, bdom; if (namelen > UCHAR_MAX || namelen <= offsetof(struct sockaddr_big, sb_data)) return EINVAL; error = copyin(name, sb, namelen); if (error) return error; bdom = linux_to_bsd_domain(sb->sb_family); if (bdom == -1) return EINVAL; /* * If the family is unspecified, use address family of the socket. * This avoid triggering strict family checks in netinet/in_pcb.c et.al. */ if (bdom == AF_UNSPEC) { struct socket *so; /* fd_getsock() will use the descriptor for us */ if ((error = fd_getsock(s, &so)) != 0) return error; bdom = so->so_proto->pr_domain->dom_family; fd_putfile(s); } /* * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6, * which lacks the scope id compared with RFC2553 one. If we detect * the situation, reject the address and write a message to system log. * * Still accept addresses for which the scope id is not used. */ if (bdom == AF_INET6 && namelen == sizeof(struct sockaddr_in6) - sizeof(uint32_t)) { struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sb; if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) && (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) || IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) || IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) || IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) { struct proc *p = l->l_proc; int uid = l->l_cred ? kauth_cred_geteuid(l->l_cred) : -1; log(LOG_DEBUG, "pid %d (%s), uid %d: obsolete pre-RFC2553 " "sockaddr_in6 rejected", p->p_pid, p->p_comm, uid); return EINVAL; } namelen = sizeof(struct sockaddr_in6); sin6->sin6_scope_id = 0; } sb->sb_family = bdom; sb->sb_len = namelen; ktrkuser("mbsoname", sb, namelen); return 0; } static int linux_sa_put(struct osockaddr *osa) { struct sockaddr sa; struct osockaddr *kosa; int error, bdom, len; /* * Only read/write the sockaddr family and length part, the rest is * not changed. */ len = sizeof(sa.sa_len) + sizeof(sa.sa_family); error = copyin(osa, &sa, len); if (error) return (error); bdom = bsd_to_linux_domain(sa.sa_family); if (bdom == -1) return (EINVAL); /* Note: we convert from sockaddr to osockaddr here, too */ kosa = (struct osockaddr *) &sa; kosa->sa_family = bdom; error = copyout(kosa, osa, len); if (error) return (error); return (0); } #ifndef __amd64__ int linux_sys_recv(struct lwp *l, const struct linux_sys_recv_args *uap, register_t *retval) { /* { syscallarg(int) s; syscallarg(void *) buf; syscallarg(int) len; syscallarg(int) flags; } */ struct sys_recvfrom_args bra; SCARG(&bra, s) = SCARG(uap, s); SCARG(&bra, buf) = SCARG(uap, buf); SCARG(&bra, len) = (size_t) SCARG(uap, len); SCARG(&bra, flags) = SCARG(uap, flags); SCARG(&bra, from) = NULL; SCARG(&bra, fromlenaddr) = NULL; return (sys_recvfrom(l, &bra, retval)); } int linux_sys_send(struct lwp *l, const struct linux_sys_send_args *uap, register_t *retval) { /* { syscallarg(int) s; syscallarg(void *) buf; syscallarg(int) len; syscallarg(int) flags; } */ struct sys_sendto_args bsa; SCARG(&bsa, s) = SCARG(uap, s); SCARG(&bsa, buf) = SCARG(uap, buf); SCARG(&bsa, len) = SCARG(uap, len); SCARG(&bsa, flags) = SCARG(uap, flags); SCARG(&bsa, to) = NULL; SCARG(&bsa, tolen) = 0; return (sys_sendto(l, &bsa, retval)); } #endif int linux_sys_accept(struct lwp *l, const struct linux_sys_accept_args *uap, register_t *retval) { /* { syscallarg(int) s; syscallarg(struct osockaddr *) name; syscallarg(int *) anamelen; } */ int error; struct sys_accept_args baa; SCARG(&baa, s) = SCARG(uap, s); SCARG(&baa, name) = (struct sockaddr *) SCARG(uap, name); SCARG(&baa, anamelen) = (unsigned int *) SCARG(uap, anamelen); if ((error = sys_accept(l, &baa, retval))) return (error); if (SCARG(uap, name) && (error = linux_sa_put(SCARG(uap, name)))) return (error); return (0); } int linux_sys_accept4(struct lwp *l, const struct linux_sys_accept4_args *uap, register_t *retval) { /* { syscallarg(int) s; syscallarg(struct osockaddr *) name; syscallarg(int *) anamelen; syscallarg(int) flags; } */ int error, flags; struct sockaddr_big name; if ((flags = linux_to_bsd_type(SCARG(uap, flags))) == -1) return EINVAL; name.sb_len = UCHAR_MAX; error = do_sys_accept(l, SCARG(uap, s), (struct sockaddr *)&name, retval, NULL, flags, 0); if (error != 0) return error; error = copyout_sockname_sb((struct sockaddr *)SCARG(uap, name), SCARG(uap, anamelen), MSG_LENUSRSPACE, &name); if (error != 0) { int fd = (int)*retval; if (fd_getfile(fd) != NULL) (void)fd_close(fd); return error; } if (SCARG(uap, name) && (error = linux_sa_put(SCARG(uap, name)))) return error; return 0; } int linux_sys_sendmmsg(struct lwp *l, const struct linux_sys_sendmmsg_args *uap, register_t *retval) { /* { syscallarg(int) s; syscallarg(struct linux_mmsghdr *) msgvec; syscallarg(unsigned int) vlen; syscallarg(unsigned int) flags; } */ struct linux_mmsghdr lmsg; struct mmsghdr bmsg; struct socket *so; file_t *fp; struct msghdr *msg = &bmsg.msg_hdr; int error, s; unsigned int vlen, flags, dg; if ((flags = linux_to_bsd_msg_flags(SCARG(uap, flags))) == -1) return EINVAL; flags = (flags & MSG_USERFLAGS) | MSG_IOVUSRSPACE; s = SCARG(uap, s); if ((error = fd_getsock1(s, &so, &fp)) != 0) return error; vlen = SCARG(uap, vlen); if (vlen > 1024) vlen = 1024; for (dg = 0; dg < vlen;) { error = copyin(SCARG(uap, msgvec) + dg, &lmsg, sizeof(lmsg)); if (error) break; linux_to_bsd_msghdr(&lmsg.msg_hdr, &bmsg.msg_hdr); msg->msg_flags = flags; error = do_sys_sendmsg_so(l, s, so, fp, msg, flags, &msg, sizeof(msg), retval); if (error) break; ktrkuser("msghdr", msg, sizeof *msg); lmsg.msg_len = *retval; error = copyout(&lmsg, SCARG(uap, msgvec) + dg, sizeof(lmsg)); if (error) break; dg++; } *retval = dg; if (error) so->so_error = error; fd_putfile(s); /* * If we succeeded at least once, return 0, hopefully so->so_error * will catch it next time. */ if (dg) return 0; return error; } int linux_sys_recvmmsg(struct lwp *l, const struct linux_sys_recvmmsg_args *uap, register_t *retval) { /* { syscallarg(int) s; syscallarg(struct linux_mmsghdr *) msgvec; syscallarg(unsigned int) vlen; syscallarg(unsigned int) flags; syscallarg(struct linux_timespec *) timeout; } */ struct linux_mmsghdr lmsg; struct mmsghdr bmsg; struct socket *so; struct msghdr *msg = &bmsg.msg_hdr; int error, s; struct mbuf *from, *control; struct timespec ts, now; struct linux_timespec lts; unsigned int vlen, flags, dg; if (SCARG(uap, timeout)) { error = copyin(SCARG(uap, timeout), <s, sizeof(lts)); return error; ts.tv_sec = lts.tv_sec; ts.tv_nsec = lts.tv_nsec; getnanotime(&now); timespecadd(&now, &ts, &ts); } s = SCARG(uap, s); if ((error = fd_getsock(s, &so)) != 0) return error; vlen = SCARG(uap, vlen); if (vlen > 1024) vlen = 1024; from = NULL; flags = (SCARG(uap, flags) & MSG_USERFLAGS) | MSG_IOVUSRSPACE; for (dg = 0; dg < vlen;) { error = copyin(SCARG(uap, msgvec) + dg, &lmsg, sizeof(lmsg)); if (error) break; linux_to_bsd_msghdr(&lmsg.msg_hdr, &bmsg.msg_hdr); msg->msg_flags = flags & ~MSG_WAITFORONE; if (from != NULL) { m_free(from); from = NULL; } error = do_sys_recvmsg_so(l, s, so, msg, NULL, 0, &from, msg->msg_control != NULL ? &control : NULL, retval); if (error) { if (error == EAGAIN && dg > 0) error = 0; break; } if (msg->msg_control != NULL) error = linux_copyout_msg_control(l, msg, control); if (error) break; if (from != NULL) { mtod(from, struct osockaddr *)->sa_family = bsd_to_linux_domain(mtod(from, struct sockaddr *)->sa_family); error = copyout_sockname(msg->msg_name, &msg->msg_namelen, 0, from); if (error) break; } lmsg.msg_len = *retval; ktrkuser("msghdr", msg, sizeof(*msg)); bsd_to_linux_msghdr(msg, &lmsg.msg_hdr); error = copyout(&lmsg, SCARG(uap, msgvec) + dg, sizeof(lmsg)); if (error) break; dg++; if (msg->msg_flags & MSG_OOB) break; if (SCARG(uap, timeout)) { getnanotime(&now); timespecsub(&now, &ts, &now); if (now.tv_sec > 0) break; } if (flags & MSG_WAITFORONE) flags |= MSG_DONTWAIT; } if (from != NULL) m_free(from); *retval = dg; if (error) so->so_error = error; fd_putfile(s); /* * If we succeeded at least once, return 0, hopefully so->so_error * will catch it next time. */ if (dg) return 0; return error; }