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#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>
#include <netdb.h>
#include <errno.h>
#include <syslog.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include "qarsh_packet.h"
/* Some generic socket related functions to make things easier */
int
getsockport(int sd)
{
struct sockaddr_in addr;
socklen_t addrlen;
addrlen = sizeof addr;
if (getsockname(sd, (struct sockaddr *)&addr, &addrlen) == 0) {
return ntohs(addr.sin_port);
} else {
return -1;
}
}
int
bind_any(int minport)
{
int sd;
struct sockaddr_in addr;
sd = socket(AF_INET, SOCK_STREAM, 0);
if (sd == -1) return -1;
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl(INADDR_ANY);
do {
addr.sin_port = htons(minport++);
} while (bind(sd, (struct sockaddr *)&addr, sizeof addr) != 0);
if (listen(sd, 0) == -1) {
syslog(LOG_WARNING, "listen error %d, %s", errno,
strerror(errno));
}
return sd;
}
int
connect_to_host(char *hostname, int port)
{
struct hostent *h;
struct sockaddr_in haddr;
int sd;
if ((h = gethostbyname(hostname)) == NULL) {
return -1;
}
haddr.sin_family = h->h_addrtype;
haddr.sin_port = htons(port);
memcpy(&haddr.sin_addr, h->h_addr, h->h_length);
sd = socket(PF_INET, SOCK_STREAM, 0);
if (sd == -1) return -1;
if (connect(sd, (struct sockaddr *)&haddr, sizeof haddr) == -1) {
return -1;
}
return sd;
}
int
connect_to_peer(struct sockaddr_in *peer, int port)
{
struct sockaddr_in in_peer;
int sd;
int fdflags;
in_peer.sin_family = AF_INET;
in_peer.sin_port = htons(port);
in_peer.sin_addr = peer->sin_addr;
sd = socket(PF_INET, SOCK_STREAM, 0);
if (sd == -1) return -1;
/* Set close-on-exec for these sds */
if ((fdflags = fcntl(sd, F_GETFD, 0)) < 0) {
return -1;
}
fdflags |= FD_CLOEXEC;
if (fcntl(sd, F_SETFD, fdflags) < 0) {
return -1;
}
if (connect(sd, (struct sockaddr *)&in_peer, sizeof in_peer) == -1) {
return -1;
}
return sd;
}
struct qa_packet *
recv_packet(int fd)
{
char *packetbuf;
int packetsize;
struct qa_packet *qp = NULL;
packetbuf = malloc(QARSH_MAX_PACKET_SIZE);
memset(packetbuf, 0, QARSH_MAX_PACKET_SIZE);
packetsize = read(fd, packetbuf, QARSH_MAX_PACKET_SIZE);
if (packetsize > 0) {
qp = parse_packets(packetbuf, packetsize);
}
free(packetbuf);
return qp;
}
int
send_packet(int fd, struct qa_packet *qp)
{
char *packetbuf;
int packetsize;
ssize_t ret;
packetbuf = malloc(QARSH_MAX_PACKET_SIZE);
memset(packetbuf, 0, QARSH_MAX_PACKET_SIZE);
packetbuf = qptostr(qp, &packetbuf, &packetsize);
ret = write(fd, packetbuf, packetsize);
free(packetbuf);
return ret;
}
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