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Signed-off-by: Stacey Son Assisted-by: Claude Opus 4.6 (1M context) Reviewed-by: Pierrick Bouvier Acked-by: Richard Henderson Signed-off-by: Warner Losh --- bsd-user/bsd-socket.c | 98 +++++++++++++++++++++++++++++++++++++++++ bsd-user/meson.build | 1 + bsd-user/qemu-bsd.h | 8 ++++ bsd-user/syscall_defs.h | 49 +++++++++++++++------ 4 files changed, 143 insertions(+), 13 deletions(-) create mode 100644 bsd-user/bsd-socket.c diff --git a/bsd-user/bsd-socket.c b/bsd-user/bsd-socket.c new file mode 100644 index 0000000000..cc45400e4c --- /dev/null +++ b/bsd-user/bsd-socket.c @@ -0,0 +1,98 @@ +/* + * BSD socket system call related helpers + * + * Copyright (c) 2013 Stacey D. Son + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ +#include "qemu/osdep.h" + +#include +#include +#include +#include + +#include "qemu.h" +#include "qemu-bsd.h" + +/* + * socket conversion + */ +abi_long target_to_host_sockaddr(struct sockaddr *addr, abi_ulong target_addr, + socklen_t len) +{ + const socklen_t unix_maxlen = sizeof(struct sockaddr_un); + sa_family_t sa_family; + struct target_sockaddr *target_saddr; + + target_saddr = lock_user(VERIFY_READ, target_addr, len, 1); + if (target_saddr == 0) { + return -TARGET_EFAULT; + } + + sa_family = target_saddr->sa_family; + + /* + * Oops. The caller might send a incomplete sun_path; sun_path + * must be terminated by \0 (see the manual page), but unfortunately + * it is quite common to specify sockaddr_un length as + * "strlen(x->sun_path)" while it should be "strlen(...) + 1". We will + * fix that here if needed. + */ + if (target_saddr->sa_family == AF_UNIX) { + if (len < unix_maxlen && len > 0) { + char *cp = (char *)target_saddr; + + if (cp[len - 1] && !cp[len]) { + len++; + } + } + if (len > unix_maxlen) { + len = unix_maxlen; + } + } + + memcpy(addr, target_saddr, len); + addr->sa_family = sa_family; /* type uint8_t */ + addr->sa_len = target_saddr->sa_len; /* type uint8_t */ + unlock_user(target_saddr, target_addr, 0); + + return 0; +} + +abi_long host_to_target_sockaddr(abi_ulong target_addr, struct sockaddr *addr, + socklen_t len) +{ + struct target_sockaddr *target_saddr; + + target_saddr = lock_user(VERIFY_WRITE, target_addr, len, 0); + if (target_saddr == 0) { + return -TARGET_EFAULT; + } + memcpy(target_saddr, addr, len); + target_saddr->sa_family = addr->sa_family; /* type uint8_t */ + target_saddr->sa_len = addr->sa_len; /* type uint8_t */ + unlock_user(target_saddr, target_addr, len); + + return 0; +} + +abi_long target_to_host_ip_mreq(struct ip_mreqn *mreqn, abi_ulong target_addr, + socklen_t len) +{ + struct target_ip_mreqn *target_smreqn; + + target_smreqn = lock_user(VERIFY_READ, target_addr, len, 1); + if (target_smreqn == 0) { + return -TARGET_EFAULT; + } + mreqn->imr_multiaddr.s_addr = target_smreqn->imr_multiaddr.s_addr; + mreqn->imr_address.s_addr = target_smreqn->imr_address.s_addr; + if (len == sizeof(struct target_ip_mreqn)) { + mreqn->imr_ifindex = tswap32(target_smreqn->imr_ifindex); + } + unlock_user(target_smreqn, target_addr, 0); + + return 0; +} + diff --git a/bsd-user/meson.build b/bsd-user/meson.build index 2abcae5122..ab6ddf2e9f 100644 --- a/bsd-user/meson.build +++ b/bsd-user/meson.build @@ -11,6 +11,7 @@ bsd_user_ss.add(files( 'bsd-mem.c', 'bsd-misc.c', 'bsd-proc.c', + 'bsd-socket.c', 'bsdload.c', 'elfload.c', 'main.c', diff --git a/bsd-user/qemu-bsd.h b/bsd-user/qemu-bsd.h index 756425d18e..e32a09b37c 100644 --- a/bsd-user/qemu-bsd.h +++ b/bsd-user/qemu-bsd.h @@ -32,6 +32,14 @@ int host_to_target_waitstatus(int status); void h2g_rusage(const struct rusage *rusage, struct target_freebsd_rusage *target_rusage); +/* bsd-socket.c */ +abi_long target_to_host_sockaddr(struct sockaddr *addr, abi_ulong target_addr, + socklen_t len); +abi_long host_to_target_sockaddr(abi_ulong target_addr, struct sockaddr *addr, + socklen_t len); +abi_long target_to_host_ip_mreq(struct ip_mreqn *mreqn, abi_ulong target_addr, + socklen_t len); + /* bsd-mem.c */ void target_to_host_ipc_perm__locked(struct ipc_perm *host_ip, struct target_ipc_perm *target_ip); diff --git a/bsd-user/syscall_defs.h b/bsd-user/syscall_defs.h index 75122ad521..1a85ceb464 100644 --- a/bsd-user/syscall_defs.h +++ b/bsd-user/syscall_defs.h @@ -203,6 +203,42 @@ struct target_freebsd__wrusage { struct target_freebsd_rusage wru_children; }; +/* + * sys/socket.h + */ +struct target_msghdr { + abi_long msg_name; /* Socket name */ + int32_t msg_namelen; /* Length of name */ + abi_long msg_iov; /* Data blocks */ + int32_t msg_iovlen; /* Number of blocks */ + abi_long msg_control; /* Per protocol magic (eg BSD fd passing) */ + int32_t msg_controllen; /* Length of cmsg list */ + int32_t msg_flags; /* flags on received message */ +}; + +struct target_sockaddr { + uint8_t sa_len; + uint8_t sa_family; + uint8_t sa_data[14]; +} QEMU_PACKED; + +struct target_in_addr { + uint32_t s_addr; /* big endian */ +}; +/* + * netinet/in.h + */ +struct target_ip_mreq { + struct target_in_addr imr_multiaddr; + struct target_in_addr imr_interface; +}; + +struct target_ip_mreqn { + struct target_in_addr imr_multiaddr; + struct target_in_addr imr_address; + int32_t imr_ifindex; +}; + /* * sys/stat.h */ @@ -531,19 +567,6 @@ type safe_##name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, \ return safe_syscall(SYS_##name, arg1, arg2, arg3, arg4, arg5, arg6); \ } -/* - * sys/socket.h - */ -struct target_sockaddr { - uint8_t sa_len; - uint8_t sa_family; - uint8_t sa_data[14]; -} QEMU_PACKED; - -struct target_in_addr { - uint32_t s_addr; /* big endian */ -}; - #define safe_ioctl(...) safe_syscall(SYS_ioctl, __VA_ARGS__) #define safe_fcntl(...) safe_syscall(SYS_fcntl, __VA_ARGS__) -- 2.55.0