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#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <arpa/inet.h>
#include <netdb.h>
#include "socket.h"
#include "typedef.h"
void *get_in_addr(struct sockaddr *sa)
{
if (sa->sa_family == AF_INET) {
return &(((struct sockaddr_in*)sa)->sin_addr);
}
return &(((struct sockaddr_in6*)sa)->sin6_addr);
}
int listener(char *port, void (*on_recv)(char *, int))
{
int sockfd;
int ret;
struct addrinfo hints, *servinfo;
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_INET6; // set to AF_INET to use IPv4
hints.ai_socktype = SOCK_DGRAM;
hints.ai_flags = AI_PASSIVE; // use my IP
int rv;
if((rv = getaddrinfo(NULL, port, &hints, &servinfo)) != 0) {
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rv));
return 1;
}
struct addrinfo *p;
for(p = servinfo; p != NULL; p = p->ai_next)
{
if((sockfd = socket(p->ai_family, p->ai_socktype,
p->ai_protocol)) == -1) {
perror("listener: socket");
continue;
}
if (bind(sockfd, p->ai_addr, p->ai_addrlen) == -1) {
close(sockfd);
perror("listener: bind");
continue;
}
break;
}
if(p == NULL) {
fprintf(stderr, "listener: failed to bind socket\n");
return 2;
}
freeaddrinfo(servinfo);
#include <time.h>
int i = 0;
time_t now = 0;
while(1)
{
if(now < time(NULL)) {
now = time(NULL);
printf("FPS: %d\n", i);
i = 0;
}
char buf[BUF_CAP] = {0};
struct sockaddr_storage their_addr;
socklen_t addr_len = sizeof(their_addr);
int numbytes;
if ((numbytes = recvfrom(sockfd, buf, BUF_CAP-1 , 0,
(struct sockaddr *)&their_addr, &addr_len)) == -1) {
perror("recvfrom");
return 1;
}
#ifdef LOG_INFO_STDOUT
char s[INET6_ADDRSTRLEN];
printf("listener: got packet from %s, %d bytes long\n",
inet_ntop(their_addr.ss_family,
get_in_addr((struct sockaddr *)&their_addr),
s, sizeof(s)), numbytes);
#endif
on_recv(buf, numbytes);
i++;
}
return 0;
}
int talker(char *port, char *address, void (*on_send)(char *, int *))
{
int sockfd;
struct addrinfo hints, *servinfo;
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_INET6; // set to AF_INET to use IPv4
hints.ai_socktype = SOCK_DGRAM;
int rv;
if((rv = getaddrinfo(address, port, &hints, &servinfo)) != 0) {
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rv));
return 1;
}
struct addrinfo *p;
for(p = servinfo; p != NULL; p = p->ai_next)
{
if((sockfd = socket(p->ai_family, p->ai_socktype,
p->ai_protocol)) == -1) {
perror("talker: socket");
continue;
}
break;
}
if(p == NULL) {
fprintf(stderr, "talker: failed to create socket\n");
return 2;
}
while(1)
{
char buf[BUF_CAP] = {0};
int bytes;
on_send(buf, &bytes);
int numbytes;
if((numbytes = sendto(sockfd, buf, bytes, 0,
p->ai_addr, p->ai_addrlen)) == -1) {
perror("talker: sendto");
return 1;
}
#ifdef LOG_INFO_STDOUT
printf("talker: sent %d bytes to %s\n", numbytes, address);
#endif
}
freeaddrinfo(servinfo);
close(sockfd);
return 0;
}
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