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resolver: Clean up and simplify gethostbyname/gethostbyaddr/getnameinfo

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This commit is contained in:
fincs 2019-10-28 14:04:25 +01:00
parent af4a025e9b
commit f062c6ecab
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GPG Key ID: 62C7609ADA219C60
1 changed files with 109 additions and 124 deletions
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233
nx/source/runtime/resolver.c
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@ -77,7 +77,7 @@ Result resolverRemoveIpAddressFromCache(u32 ip) {
return MAKERESULT(Module_Libnx, LibnxError_NotInitialized); // not implemented
}
static struct hostent *_resolverDeserializeHostent(int *err, const void *out_he_serialized) {
static struct hostent *_resolverDeserializeHostent(const void *out_he_serialized) {
const char *buf = (const char *)out_he_serialized;
const char *pos, *pos_aliases, *pos_addresses;
size_t name_size, total_aliases_size = 0;
@ -114,7 +114,8 @@ static struct hostent *_resolverDeserializeHostent(int *err, const void *out_he_
// sfdnsres will only return IPv4 addresses for the "host" commands
if (addrtype != AF_INET || addrlen != sizeof(struct in_addr)) {
*err = NO_ADDRESS;
h_errno = NO_ADDRESS;
errno = EINVAL;
return NULL;
}
@ -134,7 +135,8 @@ static struct hostent *_resolverDeserializeHostent(int *err, const void *out_he_
);
if (!he) {
*err = NO_RECOVERY;
h_errno = NETDB_INTERNAL;
errno = ENOMEM;
return NULL;
}
@ -357,111 +359,107 @@ void freeaddrinfo(struct addrinfo *ai) {
}
struct hostent *gethostbyname(const char *name) {
Result rc = 0;
void *out_he_serialized = malloc(g_resolverHostByNameBufferSize);
struct hostent *he = NULL;
u32 ret = 0;
u32 errno_ = 0;
if(out_he_serialized == NULL) {
h_errno = NO_RECOVERY;
errno = ENOMEM; // POSIX leaves this unspecified
goto cleanup;
if (!name) {
h_errno = HOST_NOT_FOUND;
errno = EINVAL;
return NULL;
}
rc = sfdnsresGetHostByNameRequest(
if (!g_resolverHostByNameBufferSize) {
h_errno = NETDB_INTERNAL;
errno = ENOSPC;
return NULL;
}
void *out_serialized = malloc(g_resolverHostByNameBufferSize);
if (!out_serialized) {
h_errno = NETDB_INTERNAL;
errno = ENOMEM;
return NULL;
}
Result rc = sfdnsresGetHostByNameRequest(
g_resolverCancelHandle,
!g_resolverDisableServiceDiscovery,
name,
&ret,
&errno_,
out_he_serialized, g_resolverHostByNameBufferSize,
(u32*)&h_errno,
(u32*)&errno,
out_serialized, g_resolverHostByNameBufferSize,
NULL);
g_resolverCancelHandle = 0;
if(rc == 0xD401) {
h_errno = NO_RECOVERY;
errno = EFAULT; // POSIX leaves this unspecified
goto cleanup;
}
else if(R_FAILED(rc) && R_MODULE(rc) == 1) { // Kernel
h_errno = TRY_AGAIN;
errno = EAGAIN; // POSIX leaves this unspecified
goto cleanup;
}
else if(R_FAILED(rc)) {
h_errno = NO_RECOVERY;
errno = EINVAL; // POSIX leaves this unspecified
goto cleanup;
}
if(ret != NETDB_SUCCESS) {
h_errno = ret;
errno = errno_; // POSIX leaves this unspecified
goto cleanup;
}
he = _resolverDeserializeHostent(&h_errno, out_he_serialized);
if(he == NULL) {
h_errno = NO_RECOVERY;
errno = ENOMEM; // POSIX leaves this unspecified
}
cleanup:
g_resolverResult = rc;
free(out_he_serialized);
return he;
if (R_FAILED(rc)) {
if (R_MODULE(rc) == 21) // SM
errno = EAGAIN;
else if (R_MODULE(rc) == 1) // Kernel
errno = EFAULT;
else
errno = EPIPE;
h_errno = NETDB_INTERNAL;
}
struct hostent *ret = NULL;
if (h_errno == NETDB_SUCCESS)
ret = _resolverDeserializeHostent(out_serialized);
free(out_serialized);
return ret;
}
struct hostent *gethostbyaddr(const void *addr, socklen_t len, int type) {
Result rc = 0;
void *out_he_serialized = malloc(g_resolverHostByAddrBufferSize);
struct hostent *he = NULL;
u32 ret = 0;
u32 errno_ = 0;
if(out_he_serialized == NULL) {
h_errno = NO_RECOVERY;
errno = ENOMEM; // POSIX leaves this unspecified
goto cleanup;
if (!addr || !len) {
h_errno = HOST_NOT_FOUND;
errno = EINVAL;
return NULL;
}
rc = sfdnsresGetHostByAddrRequest(
if (type != AF_INET) {
h_errno = HOST_NOT_FOUND;
errno = EOPNOTSUPP;
return NULL;
}
if (!g_resolverHostByAddrBufferSize) {
h_errno = NETDB_INTERNAL;
errno = ENOSPC;
return NULL;
}
void *out_serialized = malloc(g_resolverHostByAddrBufferSize);
if (!out_serialized) {
h_errno = NETDB_INTERNAL;
errno = ENOMEM;
return NULL;
}
Result rc = sfdnsresGetHostByAddrRequest(
addr, len,
type,
g_resolverCancelHandle,
&ret,
&errno_,
out_he_serialized, g_resolverHostByAddrBufferSize,
(void*)&h_errno,
(void*)&errno,
out_serialized, g_resolverHostByAddrBufferSize,
NULL);
g_resolverCancelHandle = 0;
if(rc == 0xD401) {
h_errno = NO_RECOVERY; // POSIX leaves this unspecified
errno = EFAULT;
goto cleanup;
}
else if(R_FAILED(rc) && R_MODULE(rc) == 1) { // Kernel
h_errno = TRY_AGAIN;
errno = EAGAIN; // POSIX leaves this unspecified
goto cleanup;
}
else if(R_FAILED(rc)) {
h_errno = NO_RECOVERY;
errno = EINVAL; // POSIX leaves this unspecified
goto cleanup;
}
if(ret != NETDB_SUCCESS) {
h_errno = ret;
errno = errno_; // POSIX leaves this unspecified
goto cleanup;
}
he = _resolverDeserializeHostent(&h_errno, out_he_serialized);
if(he == NULL) {
h_errno = NO_RECOVERY;
errno = ENOMEM; // POSIX leaves this unspecified
}
cleanup:
g_resolverResult = rc;
free(out_he_serialized);
return he;
if (R_FAILED(rc)) {
if (R_MODULE(rc) == 21) // SM
errno = EAGAIN;
else if (R_MODULE(rc) == 1) // Kernel
errno = EFAULT;
else
errno = EPIPE;
h_errno = NETDB_INTERNAL;
}
struct hostent *ret = NULL;
if (h_errno == NETDB_SUCCESS)
ret = _resolverDeserializeHostent(out_serialized);
free(out_serialized);
return ret;
}
const char *hstrerror(int err) {
@ -517,7 +515,7 @@ int getaddrinfo(const char *node, const char *service, const struct addrinfo *hi
return EAI_FAIL;
}
s32 gaie = 0;
s32 ret = 0;
Result rc = sfdnsresGetAddrInfoRequest(
g_resolverCancelHandle,
!g_resolverDisableServiceDiscovery,
@ -526,7 +524,7 @@ int getaddrinfo(const char *node, const char *service, const struct addrinfo *hi
hints_serialized, hints_sz,
out_serialized, g_resolverAddrInfoBufferSize,
(u32*)&errno,
&gaie,
&ret,
NULL);
g_resolverResult = rc;
g_resolverCancelHandle = 0;
@ -539,61 +537,48 @@ int getaddrinfo(const char *node, const char *service, const struct addrinfo *hi
errno = EFAULT;
else
errno = EPIPE;
gaie = EAI_SYSTEM;
ret = EAI_SYSTEM;
}
if (gaie == 0) {
if (ret == 0) {
*res = _resolverDeserializeAddrInfoList(out_serialized);
if (!*res) {
errno = ENOMEM;
gaie = EAI_MEMORY;
ret = EAI_MEMORY;
}
}
free(out_serialized);
return gaie;
return ret;
}
int getnameinfo(const struct sockaddr *sa, socklen_t salen,
char *host, socklen_t hostlen,
char *serv, socklen_t servlen,
int flags) {
Result rc = 0;
u32 errno_ = 0;
s32 gaie = 0;
rc = sfdnsresGetNameInfoRequest(
s32 ret = 0;
Result rc = sfdnsresGetNameInfoRequest(
flags,
sa, salen,
host, hostlen,
serv, servlen,
g_resolverCancelHandle,
&errno_,
&gaie);
(u32*)&errno,
&ret);
g_resolverResult = rc;
g_resolverCancelHandle = 0;
if(rc == 0xD401) {
gaie = EAI_SYSTEM;
errno = EFAULT;
goto cleanup;
}
else if(R_FAILED(rc) && R_MODULE(rc) == 1) { // Kernel
gaie = EAI_AGAIN;
goto cleanup;
}
else if(R_FAILED(rc)) {
gaie = EAI_FAIL;
goto cleanup;
if (R_FAILED(rc)) {
if (R_MODULE(rc) == 21) // SM
errno = EAGAIN;
else if (R_MODULE(rc) == 1) // Kernel
errno = EFAULT;
else
errno = EPIPE;
ret = EAI_SYSTEM;
}
if(gaie != 0) {
if(gaie == EAI_SYSTEM)
errno = errno_;
}
cleanup:
g_resolverResult = rc;
return gaie;
return ret;
}
long gethostid(void) {