static int
_parseSrc(const char *token, char *srcAddress, uint16_t *srcPort)
{
if (sscanf(token, "%*[^%%]%%3D%[^%%]%%3A%hd", srcAddress, srcPort) != 2) {
return -1;
}
// Normalize the provided hostname
struct sockaddr_in *addr = (struct sockaddr_in *) parcNetwork_SockAddress(srcAddress, *srcPort);
char *hostname = inet_ntoa(addr->sin_addr);
parcMemory_Deallocate(&addr);
memcpy(srcAddress, hostname, strlen(hostname) + 1);
return 0;
}
static AthenaTransportLink *
_UDPOpen(AthenaTransportLinkModule *athenaTransportLinkModule, PARCURI *connectionURI)
{
AthenaTransportLink *result = 0;
const char *authorityString = parcURI_GetAuthority(connectionURI);
if (authorityString == NULL) {
parcLog_Error(athenaTransportLinkModule_GetLogger(athenaTransportLinkModule),
"Unable to parse connection authority %s", authorityString);
errno = EINVAL;
return NULL;
}
PARCURIAuthority *authority = parcURIAuthority_Parse(authorityString);
const char *URIAddress = parcURIAuthority_GetHostName(authority);
in_port_t port = parcURIAuthority_GetPort(authority);
// Normalize the provided hostname
struct sockaddr_in *addr = (struct sockaddr_in *) parcNetwork_SockAddress(URIAddress, port);
char *address = inet_ntoa(addr->sin_addr);
parcMemory_Deallocate(&addr);
parcURIAuthority_Release(&authority);
if (address == NULL) {
parcLog_Error(athenaTransportLinkModule_GetLogger(athenaTransportLinkModule),
"Unable to lookup hostname %s", address);
errno = EINVAL;
return NULL;
}
if (port == 0) {
parcLog_Error(athenaTransportLinkModule_GetLogger(athenaTransportLinkModule),
"Invalid address specification, port == 0");
errno = EINVAL;
return NULL;
}
bool listener = false;
char name[MAXPATHLEN] = { 0 };
char srcAddress[NI_MAXHOST] = "0.0.0.0";
size_t mtu = 0;
uint16_t srcPort = 0;
char localFlag[MAXPATHLEN] = { 0 };
int forceLocal = 0;
char *linkName = NULL;
PARCURIPath *remainder = parcURI_GetPath(connectionURI);
size_t segments = parcURIPath_Count(remainder);
for (int i = 0; i < segments; i++) {
PARCURISegment *segment = parcURIPath_Get(remainder, i);
const char *token = parcURISegment_ToString(segment);
if (strcasecmp(token, UDP_LISTENER_FLAG) == 0) {
listener = true;
parcMemory_Deallocate(&token);
continue;
}
if (strncasecmp(token, SRC_LINK_SPECIFIER, strlen(SRC_LINK_SPECIFIER)) == 0) {
if (sscanf(token, "%*[^%%]%%3D%[^%%]%%3A%hd", srcAddress, &srcPort) != 2) {
parcLog_Error(athenaTransportLinkModule_GetLogger(athenaTransportLinkModule),
"Improper connection source specification (%s)", token);
parcMemory_Deallocate(&token);
errno = EINVAL;
return NULL;
}
// Normalize the provided hostname
struct sockaddr_in *addr = (struct sockaddr_in *) parcNetwork_SockAddress(srcAddress, srcPort);
char *hostname = inet_ntoa(addr->sin_addr);
parcMemory_Deallocate(&addr);
memcpy(srcAddress, hostname, strlen(hostname) + 1);
parcMemory_Deallocate(&token);
continue;
}
if (strncasecmp(token, LINK_MTU_SIZE, strlen(LINK_MTU_SIZE)) == 0) {
if (sscanf(token, "%*[^%%]%%3D%zd", &mtu) != 1) {
parcLog_Error(athenaTransportLinkModule_GetLogger(athenaTransportLinkModule),
"Improper MTU specification (%s)", token);
parcMemory_Deallocate(&token);
errno = EINVAL;
return NULL;
}
parcMemory_Deallocate(&token);
continue;
}
if (strncasecmp(token, LINK_NAME_SPECIFIER, strlen(LINK_NAME_SPECIFIER)) == 0) {
if (sscanf(token, "%*[^%%]%%3D%s", name) != 1) {
parcLog_Error(athenaTransportLinkModule_GetLogger(athenaTransportLinkModule),
"Improper connection name specification (%s)", token);
parcMemory_Deallocate(&token);
errno = EINVAL;
return NULL;
}
linkName = name;
parcMemory_Deallocate(&token);
continue;
}
if (strncasecmp(token, LOCAL_LINK_FLAG, strlen(LOCAL_LINK_FLAG)) == 0) {
if (sscanf(token, "%*[^%%]%%3D%s", localFlag) != 1) {
parcLog_Error(athenaTransportLinkModule_GetLogger(athenaTransportLinkModule),
"Improper local specification (%s)", token);
parcMemory_Deallocate(&token);
errno = EINVAL;
return NULL;
}
if (strncasecmp(localFlag, "false", strlen("false")) == 0) {
forceLocal = AthenaTransportLink_ForcedNonLocal;
} else if (strncasecmp(localFlag, "true", strlen("true")) == 0) {
forceLocal = AthenaTransportLink_ForcedLocal;
} else {
parcLog_Error(athenaTransportLinkModule_GetLogger(athenaTransportLinkModule),
"Improper local state specification (%s)", token);
parcMemory_Deallocate(&token);
errno = EINVAL;
return NULL;
}
parcMemory_Deallocate(&token);
continue;
}
parcLog_Error(athenaTransportLinkModule_GetLogger(athenaTransportLinkModule),
"Unknown connection parameter (%s)", token);
parcMemory_Deallocate(&token);
errno = EINVAL;
return NULL;
}
struct sockaddr_in *destination = parcNetwork_SockInet4Address(address, port);
struct sockaddr_in *source = parcNetwork_SockInet4Address(srcAddress, srcPort);
if (listener) {
result = _UDPOpenListener(athenaTransportLinkModule, linkName, destination, mtu);
} else {
result = _UDPOpenConnection(athenaTransportLinkModule, linkName, source, destination, mtu);
}
parcMemory_Deallocate(&destination);
parcMemory_Deallocate(&source);
// forced IsLocal/IsNotLocal, mainly for testing
if (result && forceLocal) {
athenaTransportLink_ForceLocal(result, forceLocal);
}
return result;
}
