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#include <arpa/inet.h>
#include <camellia.h>
#include <camellia/syscalls.h>
#include <errno.h>
#include <netdb.h>
#include <netinet/in.h>
#include <stdio.h>
#include <string.h>
#include <sys/socket.h>
int socket(int domain, int type, int protocol) {
if (domain != AF_INET || type != SOCK_STREAM || protocol != IPPROTO_TCP) {
return errno = ENOSYS, -1;
}
int h = _sys_getnull(0);
if (h < 0) {
return errno = -h, -1;
} else {
return h;
}
}
int bind(int, const struct sockaddr *, socklen_t) {
return errno = ENOSYS, -1;
}
int accept(int, struct sockaddr *, socklen_t *) {
return errno = ENOSYS, -1;
}
int listen(int, int) {
return errno = ENOSYS, -1;
}
int connect(int sockfd, const struct sockaddr *addr, socklen_t addrlen) {
char buf[256];
struct sockaddr_in *addr4 = (void*)addr;
uint32_t ip;
uint16_t port;
int newfd;
if (addr->sa_family != AF_INET) {
return errno = ENOSYS, -1;
}
if (addrlen < (ssize_t)sizeof(*addr4)) {
return errno = EINVAL, -1;
}
ip = ntohl(addr4->sin_addr.s_addr);
port = ntohs(addr4->sin_port);
if (
snprintf(buf, sizeof(buf),
"/net/connect/0.0.0.0/%d.%d.%d.%d/tcp/%d",
(ip >> 24) & 0xFF,
(ip >> 16) & 0xFF,
(ip >> 8) & 0xFF,
(ip ) & 0xFF,
port
) >= 256
) {
return errno = EGENERIC, -1;
}
newfd = camellia_open(buf, OPEN_READ | OPEN_WRITE);
if (newfd < 0) {
return -1;
}
dup2(newfd, sockfd);
close(newfd);
return 0;
}
ssize_t send(int sockfd, const void *buf, size_t len, int flags) {
if (flags != 0) {
return errno = ENOSYS, -1;
}
return write(sockfd, buf, len);
}
ssize_t recv(int sockfd, void *buf, size_t len, int flags) {
if (flags != 0) {
return errno = ENOSYS, -1;
}
return read(sockfd, buf, len);
}
int getsockopt(int, int, int, void *, socklen_t *) {
return errno = ENOSYS, -1;
}
int setsockopt(int, int, int, const void *, socklen_t) {
return 0;
}
int getsockname(int sockfd, struct sockaddr *addr, socklen_t *addrlen) {
// TODO /net/ should expose the local address somehow
/* Outputs a fake address, just to satisfy curl.
* Can't be AF_UNSPEC, as curl tries to print it with inet_ntop. */
(void)sockfd;
struct sockaddr_in dummy = {
.sin_family = AF_INET,
.sin_port = 0,
.sin_addr = {0},
};
if ((int)sizeof(dummy) < *addrlen) {
*addrlen = sizeof(dummy);
} else if (*addrlen < 0) {
return errno = EINVAL, -1;
}
memcpy(addr, &dummy, *addrlen);
return 0;
}
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