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sock: sock_copy_addr_to_user

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Matheus
2026-07-05 16:16:05 -03:00
parent 4699055cee
commit 7f8fd07f39
6 changed files with 67 additions and 33 deletions
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kernel-src/include/kernel/abi.h
+2 -2
View File
@@ -144,12 +144,12 @@ typedef struct {
uint16_t sin_family;
uint16_t sin_port;
uint32_t sin_addr;
} __attribute__((packed)) inaddr_t;
} inaddr_t;
typedef struct {
uint16_t sun_family;
char sun_path[ABISOCKADDR_UN_MAX];
} __attribute__((packed)) unaddr_t;
} unaddr_t;
typedef struct {
void *addr;
kernel-src/include/kernel/sock.h
+39
View File
@@ -193,6 +193,45 @@ static inline int sock_addrtoabiaddr(int socktype, sockaddr_t *sockaddr, abisock
return 0;
}
static inline int sock_copy_addr_to_user(int socktype, sockaddr_t *sockaddr, void *uaddr, socklen_t uaddrlen, socklen_t *actual_len) {
switch (socktype) {
case SOCKET_TYPE_UDP:
case SOCKET_TYPE_TCP: {
abisockaddr_t abisockaddr = {0};
abisockaddr.type = AF_INET;
inaddr_t *inaddr = (inaddr_t *)&abisockaddr;
inaddr->sin_addr = cpu_to_be_d(sockaddr->ipv4addr.addr);
inaddr->sin_port = cpu_to_be_w(sockaddr->ipv4addr.port);
*actual_len = sizeof(abisockaddr);
return usercopy_touser(uaddr, &abisockaddr, min(uaddrlen, sizeof(abisockaddr)));
}
case SOCKET_TYPE_LOCAL:
case SOCKET_TYPE_LOCAL_SEQPACKET: {
size_t path_len = strnlen(sockaddr->path, ABISOCKADDR_UN_MAX - 1) + 1;
if (path_len == ABISOCKADDR_UN_MAX)
return EINVAL;
*actual_len = offsetof(unaddr_t, sun_path) + (path_len != 1 ? path_len : 0);
uint16_t family = AF_LOCAL;
if (usercopy_touser(uaddr, &family, min(uaddrlen, sizeof(family))))
return EFAULT;
if (uaddrlen > offsetof(unaddr_t, sun_path) && path_len) {
size_t size = min(uaddrlen - offsetof(unaddr_t, sun_path), path_len);
if (usercopy_touser((void *)((uintptr_t)uaddr + offsetof(unaddr_t, sun_path)), sockaddr->path, size))
return EFAULT;
}
return 0;
}
default:
return EINVAL;
}
}
static inline int sock_copymsghdr(msghdr_t *khdr, msghdr_t *uhdr) {
if (usercopy_fromuser(khdr, uhdr, sizeof(msghdr_t)))
return EFAULT;