sendto() for UDP server is not sending data to client - c

Question

I'm lost, but the title sums it up. I'm trying to make a UDP server using netster, but for whatever reason, I'll get data from the client but not the other way around. I suspect it has something to do with clientaddr due to getting an error "sendto: Address family not supported by protocol," but I've looked over multiple examples and this seemed like the documented way to use the struct.
I really cannot pinpoint the issue here so I'll show all my code
void chat_server(char* iface, long port, int use_udp)
{
struct addrinfo hints;
struct addrinfo *results, *rp;
char buff4[INET_ADDRSTRLEN];
void* raw_addr;
int sfd = 0, valread, connectfd;
short end = 0;
char cport[7];
struct sockaddr_in servaddr, clientaddr;
socklen_t addrlen;
char* rescbuff;
sprintf(cport, "%ld", port);
size_t count = 0;
//TCP & UDP FLAGS
if(use_udp)
{
hints.ai_protocol = IPPROTO_UDP;
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_DGRAM;
}
else
{
hints.ai_protocol = IPPROTO_TCP;
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
}
hints.ai_flags = AI_PASSIVE;
hints.ai_canonname = NULL;
hints.ai_addr = NULL;
hints.ai_next = NULL;
//get IP address and socket from server
if(getaddrinfo(iface, cport, &hints, &results))
{
perror("getaddrinfo");
exit(-1);
}
for(rp = results; rp != NULL; rp = rp->ai_next)
{
sfd = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
if(sfd == -1) continue;
if(rp->ai_family == AF_INET)//(results->ai_family == AF_INET)
{
struct sockaddr_in* tmp = (struct sockaddr_in*)rp->ai_addr;
raw_addr = &(tmp->sin_addr);
inet_ntop(AF_INET, raw_addr, buff4, INET_ADDRSTRLEN);
break;
}
}
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
servaddr.sin_port = htons(port);
//bind
valread = bind(sfd, (struct sockaddr*)&servaddr, sizeof(servaddr));
if(valread == -1)
if(valread == -1)
{
perror("bind server");
exit(-1);
}
addrlen = sizeof(clientaddr);
rescbuff = malloc(MAX_S*sizeof(char*));
do
{
//get client IP + count connections starting at 0
//memset(&clientaddr, 0, sizeof(clientaddr));
struct sockaddr_in* pV4Addr = (struct sockaddr_in*)&clientaddr;
struct in_addr ipAddr = pV4Addr->sin_addr;
char str[INET_ADDRSTRLEN];
inet_ntop( AF_INET, &ipAddr, str, INET_ADDRSTRLEN );
clientaddr.sin_family = AF_INET;
//clientaddr.sin_addr.s_addr = inet_addr(str);
do //communicate loop
{
socklen_t len;
memset(rescbuff, 0, MAX_S);
valread = 0;
//get message
valread = recvfrom(sfd, rescbuff, MAX_S, 0, (struct sockaddr*)&clientaddr, &len);
if( valread == -1)
{
perror("recvfrom");
exit(-1);
}
//acknowledge
printf("got message from('%s', %d)\n",str, servaddr.sin_port);
printf("message %s\n", rescbuff);
//reply to message
printf("try1\n");
//valread = sendto(sfd, rescbuff, strlen(rescbuff), 0, ( struct sockaddr*)&clientaddr, sizeof(clientaddr));
valread = sendto(sfd, "hello\n", 20, 0, (struct sockaddr*)&clientaddr, sizeof(clientaddr));
if(valread == -1)
{
perror("sendto");
exit(-1);
}
printf("bytes sent: %d\n", valread);
}
while(1);
if(end) break;
}
while(1);
close(sfd);