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https://gitlab.com/qemu-project/qemu.git
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Warner Losh
1f4afa2fac
Add bsd-socket.c with target_to_host_sockaddr, host_to_target_sockaddr, and target_to_host_ip_mreq helper functions, and add it to the build. Signed-off-by: Stacey Son <sson@FreeBSD.org> Assisted-by: Claude Opus 4.6 (1M context) Reviewed-by: Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com> Acked-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Warner Losh <imp@bsdimp.com>
99 lines
2.7 KiB
C
99 lines
2.7 KiB
C
/*
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* BSD socket system call related helpers
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*
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* Copyright (c) 2013 Stacey D. Son
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "qemu/osdep.h"
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <netinet/in.h>
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#include "qemu.h"
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#include "qemu-bsd.h"
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/*
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* socket conversion
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*/
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abi_long target_to_host_sockaddr(struct sockaddr *addr, abi_ulong target_addr,
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socklen_t len)
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{
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const socklen_t unix_maxlen = sizeof(struct sockaddr_un);
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sa_family_t sa_family;
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struct target_sockaddr *target_saddr;
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target_saddr = lock_user(VERIFY_READ, target_addr, len, 1);
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if (target_saddr == 0) {
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return -TARGET_EFAULT;
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}
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sa_family = target_saddr->sa_family;
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/*
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* Oops. The caller might send a incomplete sun_path; sun_path
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* must be terminated by \0 (see the manual page), but unfortunately
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* it is quite common to specify sockaddr_un length as
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* "strlen(x->sun_path)" while it should be "strlen(...) + 1". We will
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* fix that here if needed.
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*/
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if (target_saddr->sa_family == AF_UNIX) {
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if (len < unix_maxlen && len > 0) {
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char *cp = (char *)target_saddr;
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if (cp[len - 1] && !cp[len]) {
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len++;
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}
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}
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if (len > unix_maxlen) {
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len = unix_maxlen;
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}
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}
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memcpy(addr, target_saddr, len);
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addr->sa_family = sa_family; /* type uint8_t */
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addr->sa_len = target_saddr->sa_len; /* type uint8_t */
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unlock_user(target_saddr, target_addr, 0);
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return 0;
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}
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abi_long host_to_target_sockaddr(abi_ulong target_addr, struct sockaddr *addr,
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socklen_t len)
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{
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struct target_sockaddr *target_saddr;
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target_saddr = lock_user(VERIFY_WRITE, target_addr, len, 0);
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if (target_saddr == 0) {
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return -TARGET_EFAULT;
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}
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memcpy(target_saddr, addr, len);
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target_saddr->sa_family = addr->sa_family; /* type uint8_t */
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target_saddr->sa_len = addr->sa_len; /* type uint8_t */
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unlock_user(target_saddr, target_addr, len);
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return 0;
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}
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abi_long target_to_host_ip_mreq(struct ip_mreqn *mreqn, abi_ulong target_addr,
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socklen_t len)
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{
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struct target_ip_mreqn *target_smreqn;
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target_smreqn = lock_user(VERIFY_READ, target_addr, len, 1);
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if (target_smreqn == 0) {
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return -TARGET_EFAULT;
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}
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mreqn->imr_multiaddr.s_addr = target_smreqn->imr_multiaddr.s_addr;
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mreqn->imr_address.s_addr = target_smreqn->imr_address.s_addr;
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if (len == sizeof(struct target_ip_mreqn)) {
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mreqn->imr_ifindex = tswap32(target_smreqn->imr_ifindex);
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}
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unlock_user(target_smreqn, target_addr, 0);
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return 0;
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}
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