extern int
SH_CmpSockAddr(SockBase base, struct sockaddr *sa1, struct sockaddr *sa2) {
sa_family_t fam = sa1->sa_family;
if (fam != sa2->sa_family) return (fam - sa2->sa_family);
int len1 = SockAddrLen(sa1);
int len2 = SockAddrLen(sa2);
if (len1 <= 0 || len2 <= 0) {
return Gleep(base->debug, "SH_CmpSockAddr");
}
int delta = len1-len2;
if (delta != 0) return delta;
return memcmp(sa1, sa2, len1);
}
static int
InnerConnect(SockBase base, struct sockaddr *sap) {
int fd = socket(sap->sa_family,
SOCK_STREAM,
IPPROTO_TCP);
if (fd >= 0) {
// we've got a socket, so try for a connection
int timeout = base->robustTimeout;
uint64_t start = GetCurrentTime();
for (;;) {
int connRes = connect(fd, sap, SockAddrLen(sap));
if (connRes >= 0) {
// success!
return fd;
}
MilliSleep(RobustMillis);
uint64_t now = GetCurrentTime();
double dt = DeltaTime(start, now);
int e = errno;
if (dt > timeout || (e != EAGAIN && e != EINTR)) {
// failed, so give back the socket and report the failure
close(fd);
return connRes;
}
}
}
return fd;
}
extern int
SH_CopySockAddr(SockBase base, struct sockaddr *dst, struct sockaddr *src) {
int len = SockAddrLen(src);
if (len <= 0) {
return Gleep(base->debug, "SH_CopySockAddr");
}
memcpy(dst, src, len);
return 0;
}
/**
* Try to extract an AF_INET address from a sockaddr. If successful, sa points
* to the next sockaddr and true is returned.
*/
bool ExtractIPV4AddressFromSockAddr(const uint8_t **data,
IPV4Address *ip) {
const struct sockaddr *sa = reinterpret_cast<const struct sockaddr*>(*data);
if (sa->sa_family != AF_INET) {
return false;
}
*ip = IPV4Address(
reinterpret_cast<const struct sockaddr_in*>(*data)->sin_addr.s_addr);
*data += SockAddrLen(*sa);
return true;
}
/**
* Performs a robust connect, restarting when interrupted.
* Requires a valid socket (se->fd >= 0).
*/
extern int
SH_RobustConnect(SockEntry se, struct sockaddr *sap) {
int timeout = se->base->robustTimeout;
uint64_t start = GetCurrentTime();
for (;;) {
int connRes = connect(se->fd, sap, SockAddrLen(sap));
if (connRes >= 0) {
se->lastUsed = GetCurrentTime();
return connRes;
}
int e = errno;
if (e != EAGAIN && e != EINTR) break;
MilliSleep(RobustMillis);
uint64_t now = GetCurrentTime();
double dt = DeltaTime(start, now);
if (dt > timeout) break;
}
se->errCount++;
return -1;
}