static int udp_socket_create(UDPContext *s, struct sockaddr_storage *addr, int *addr_len)
{
int udp_fd = -1;
struct addrinfo *res0 = NULL, *res = NULL;
int family = AF_UNSPEC;
if (((struct sockaddr *) &s->dest_addr)->sa_family)
family = ((struct sockaddr *) &s->dest_addr)->sa_family;
res0 = udp_ipv6_resolve_host(0, s->local_port, SOCK_DGRAM, family, AI_PASSIVE);
if (res0 == 0)
goto fail;
for (res = res0; res; res=res->ai_next) {
udp_fd = socket(res->ai_family, SOCK_DGRAM, 0);
if (udp_fd > 0) break;
av_log(NULL, AV_LOG_ERROR, "socket: %s\n", strerror(errno));
}
if (udp_fd < 0)
goto fail;
memcpy(addr, res->ai_addr, res->ai_addrlen);
*addr_len = res->ai_addrlen;
freeaddrinfo(res0);
return udp_fd;
fail:
if (udp_fd >= 0)
closesocket(udp_fd);
if(res0)
freeaddrinfo(res0);
return -1;
}
static int udp_ipv6_set_local(URLContext *h) {
UDPContext *s = h->priv_data;
int udp_fd = -1;
struct sockaddr_storage clientaddr;
socklen_t addrlen;
char sbuf[NI_MAXSERV];
char hbuf[NI_MAXHOST];
struct addrinfo *res0 = NULL, *res = NULL;
if (s->local_port != 0) {
res0 = udp_ipv6_resolve_host(0, s->local_port, SOCK_DGRAM, AF_UNSPEC, AI_PASSIVE);
if (res0 == 0)
goto fail;
for (res = res0; res; res=res->ai_next) {
udp_fd = socket(res->ai_family, SOCK_DGRAM, 0);
if (udp_fd > 0) break;
perror("socket");
}
} else {
udp_fd = socket(s->dest_addr.ss_family, SOCK_DGRAM, 0);
if (udp_fd < 0)
perror("socket");
}
if (udp_fd < 0)
goto fail;
if (s->local_port != 0) {
if (bind(udp_fd, res0->ai_addr, res0->ai_addrlen) < 0) {
perror("bind");
goto fail;
}
freeaddrinfo(res0);
res0 = NULL;
}
addrlen = sizeof(clientaddr);
if (getsockname(udp_fd, (struct sockaddr *)&clientaddr, &addrlen) < 0) {
perror("getsockname");
goto fail;
}
if (getnameinfo((struct sockaddr *)&clientaddr, addrlen, hbuf, sizeof(hbuf), sbuf, sizeof(sbuf), NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
perror("getnameinfo");
goto fail;
}
s->local_port = strtol(sbuf, NULL, 10);
return udp_fd;
fail:
if (udp_fd >= 0)
closesocket(udp_fd);
if(res0)
freeaddrinfo(res0);
return -1;
}
static int udp_set_url(struct sockaddr_storage *addr, const char *hostname, int port) {
struct addrinfo *res0;
int addr_len;
res0 = udp_ipv6_resolve_host(hostname, port, SOCK_DGRAM, AF_UNSPEC, 0);
if (res0 == 0) return AVERROR(EIO);
memcpy(addr, res0->ai_addr, res0->ai_addrlen);
addr_len = res0->ai_addrlen;
freeaddrinfo(res0);
return addr_len;
}
int udp_ipv6_set_remote_url(URLContext *h, const char *uri) {
UDPContext *s = h->priv_data;
char hostname[256];
int port;
struct addrinfo *res0;
url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
res0 = udp_ipv6_resolve_host(hostname, port, SOCK_DGRAM, AF_UNSPEC, 0);
if (res0 == 0) return AVERROR_IO;
memcpy(&s->dest_addr, res0->ai_addr, res0->ai_addrlen);
s->dest_addr_len = res0->ai_addrlen;
freeaddrinfo(res0);
return 0;
}