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#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <poll.h>
#include <ecp/core.h>
#include <ecp/tr.h>
#define MAX_ADDR_STR 32
int ecp_tr_init(ECPContext *ctx) {
return ECP_OK;
}
unsigned int ecp_tr_addr_hash(ecp_tr_addr_t *addr) {
unsigned int ret = *((unsigned int *)addr->host);
return ret ^ ((unsigned int)addr->port << 16);
}
int ecp_tr_addr_eq(ecp_tr_addr_t *addr1, ecp_tr_addr_t *addr2) {
if (addr1->port != addr2->port) return 0;
if (memcmp(addr1->host, addr2->host, sizeof(addr1->host)) != 0) return 0;
return 1;
}
int ecp_tr_addr_set(ecp_tr_addr_t *addr, void *addr_s) {
int rv;
char addr_c[MAX_ADDR_STR];
char *colon = NULL;
char *endptr = NULL;
uint16_t hport;
memset(addr_c, 0, sizeof(addr_c));
strncpy(addr_c, addr_s, sizeof(addr_c)-1);
colon = strchr(addr_c, ':');
if (colon == NULL) return ECP_ERR_ADDR;
*colon = '\0';
colon++;
if (*colon == '\0') return ECP_ERR_ADDR;
rv = inet_pton(AF_INET, addr_c, addr->host);
if (rv != 1) return ECP_ERR_ADDR;
hport = strtol(colon, &endptr, 10);
if (*endptr != '\0') return ECP_ERR_ADDR;
addr->port = htons(hport);
return ECP_OK;
}
int ecp_tr_open(ECPSocket *sock, ecp_tr_addr_t *addr) {
struct sockaddr_in _myaddr;
int rv;
memset((char *)&_myaddr, 0, sizeof(_myaddr));
_myaddr.sin_family = AF_INET;
if (addr) {
memcpy((void *)&_myaddr.sin_addr, addr->host, sizeof(addr->host));
_myaddr.sin_port = addr->port;
} else {
_myaddr.sin_addr.s_addr = htonl(INADDR_ANY);
_myaddr.sin_port = htons(0);
}
rv = socket(PF_INET, SOCK_DGRAM, 0);
if (rv < 0) return ECP_ERR_OPEN;
sock->sock = rv;
rv = bind(sock->sock, (struct sockaddr *)&_myaddr, sizeof(_myaddr));
if (rv < 0) {
close(sock->sock);
return ECP_ERR_BIND;
}
return ECP_OK;
}
void ecp_tr_close(ECPSocket *sock) {
close(sock->sock);
}
ssize_t ecp_tr_send(ECPSocket *sock, ECPBuffer *packet, size_t pkt_size, ecp_tr_addr_t *addr, unsigned char flags) {
struct sockaddr_in servaddr;
ssize_t rv;
memset((void *)&servaddr, 0, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_port = addr->port;
memcpy((void *)&servaddr.sin_addr, addr->host, sizeof(addr->host));
rv = sendto(sock->sock, packet->buffer, pkt_size, 0, (struct sockaddr *)&servaddr, sizeof(servaddr));
if (rv < 0) return ECP_ERR_SEND;
return rv;
}
ssize_t ecp_tr_recv(ECPSocket *sock, ECPBuffer *packet, ecp_tr_addr_t *addr, int timeout) {
struct sockaddr_in servaddr;
socklen_t addrlen = sizeof(servaddr);
struct pollfd fds[] = {
{sock->sock, POLLIN, 0}
};
ssize_t rv;
int _rv;
_rv = poll(fds, 1, timeout);
memset((void *)&servaddr, 0, sizeof(servaddr));
if (_rv == 1) {
rv = recvfrom(sock->sock, packet->buffer, packet->size, 0, (struct sockaddr *)&servaddr, &addrlen);
if (rv < 0) return ECP_ERR_RECV;
if (rv < ECP_MIN_PKT) return ECP_ERR_RECV;
if (addr) {
addr->port = servaddr.sin_port;
memcpy(addr->host, (void *)&servaddr.sin_addr, sizeof(addr->host));
}
return rv;
}
return ECP_ERR_TIMEOUT;
}
void ecp_tr_release(ECPBuffer *packet, unsigned char more) {}
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