net: more tcp; timeout nameserver lookups
This commit is contained in:
parent
4d8ee9840a
commit
fdc1f653d6
|
@ -320,6 +320,7 @@ int main(int argc, char * argv[]) {
|
||||||
struct sockaddr_in addr;
|
struct sockaddr_in addr;
|
||||||
addr.sin_family = AF_INET;
|
addr.sin_family = AF_INET;
|
||||||
memcpy(&addr.sin_addr.s_addr, remote->h_addr, remote->h_length);
|
memcpy(&addr.sin_addr.s_addr, remote->h_addr, remote->h_length);
|
||||||
|
addr.sin_port = htons(80); /* TODO */
|
||||||
|
|
||||||
if (connect(sock, &addr, sizeof(struct sockaddr_in)) < 0) {
|
if (connect(sock, &addr, sizeof(struct sockaddr_in)) < 0) {
|
||||||
perror("connect");
|
perror("connect");
|
||||||
|
|
|
@ -24,6 +24,7 @@ typedef struct SockData {
|
||||||
long (*sock_recv)(struct SockData * sock, struct msghdr * msg, int flags);
|
long (*sock_recv)(struct SockData * sock, struct msghdr * msg, int flags);
|
||||||
long (*sock_send)(struct SockData * sock, const struct msghdr *msg, int flags);
|
long (*sock_send)(struct SockData * sock, const struct msghdr *msg, int flags);
|
||||||
void (*sock_close)(struct SockData * sock);
|
void (*sock_close)(struct SockData * sock);
|
||||||
|
long (*sock_connect)(struct SockData * sock, const struct sockaddr *addr, socklen_t addrlen);
|
||||||
} sock_t;
|
} sock_t;
|
||||||
|
|
||||||
void net_sock_alert(sock_t * sock);
|
void net_sock_alert(sock_t * sock);
|
||||||
|
|
|
@ -49,6 +49,30 @@ struct udp_packet {
|
||||||
uint8_t payload[];
|
uint8_t payload[];
|
||||||
} __attribute__ ((packed)) __attribute__((aligned(2)));
|
} __attribute__ ((packed)) __attribute__((aligned(2)));
|
||||||
|
|
||||||
|
struct tcp_header {
|
||||||
|
uint16_t source_port;
|
||||||
|
uint16_t destination_port;
|
||||||
|
|
||||||
|
uint32_t seq_number;
|
||||||
|
uint32_t ack_number;
|
||||||
|
|
||||||
|
uint16_t flags;
|
||||||
|
uint16_t window_size;
|
||||||
|
uint16_t checksum;
|
||||||
|
uint16_t urgent;
|
||||||
|
|
||||||
|
uint8_t payload[];
|
||||||
|
} __attribute__((packed)) __attribute__((aligned(2)));
|
||||||
|
|
||||||
|
struct tcp_check_header {
|
||||||
|
uint32_t source;
|
||||||
|
uint32_t destination;
|
||||||
|
uint8_t zeros;
|
||||||
|
uint8_t protocol;
|
||||||
|
uint16_t tcp_len;
|
||||||
|
uint8_t tcp_header[];
|
||||||
|
};
|
||||||
|
|
||||||
#define IPV4_PROT_UDP 17
|
#define IPV4_PROT_UDP 17
|
||||||
#define IPV4_PROT_TCP 6
|
#define IPV4_PROT_TCP 6
|
||||||
|
|
||||||
|
@ -124,6 +148,7 @@ static void icmp_handle(struct ipv4_packet * packet, const char * src, const cha
|
||||||
extern void net_sock_add(sock_t * sock, void * frame);
|
extern void net_sock_add(sock_t * sock, void * frame);
|
||||||
|
|
||||||
static hashmap_t * udp_sockets = NULL;
|
static hashmap_t * udp_sockets = NULL;
|
||||||
|
static hashmap_t * tcp_sockets = NULL;
|
||||||
|
|
||||||
void net_ipv4_handle(struct ipv4_packet * packet, fs_node_t * nic) {
|
void net_ipv4_handle(struct ipv4_packet * packet, fs_node_t * nic) {
|
||||||
|
|
||||||
|
@ -214,7 +239,7 @@ static long sock_udp_send(sock_t * sock, const struct msghdr *msg, int flags) {
|
||||||
response->checksum = htons(calculate_ipv4_checksum(response));
|
response->checksum = htons(calculate_ipv4_checksum(response));
|
||||||
|
|
||||||
/* Stick UDP header into payload */
|
/* Stick UDP header into payload */
|
||||||
struct udp_packet * udp_packet = &response->payload;
|
struct udp_packet * udp_packet = (struct udp_packet*)&response->payload;
|
||||||
udp_packet->source_port = htons(sock->priv[0]);
|
udp_packet->source_port = htons(sock->priv[0]);
|
||||||
udp_packet->destination_port = name->sin_port;
|
udp_packet->destination_port = name->sin_port;
|
||||||
udp_packet->length = htons(sizeof(struct udp_packet) + msg->msg_iov[0].iov_len);
|
udp_packet->length = htons(sizeof(struct udp_packet) + msg->msg_iov[0].iov_len);
|
||||||
|
@ -253,6 +278,10 @@ static long sock_udp_recv(sock_t * sock, struct msghdr * msg, int flags) {
|
||||||
return resp;
|
return resp;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static long sock_tcp_send(sock_t * sock, const struct msghdr *msg, int flags) {
|
||||||
|
printf("tcp: send called\n");
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
static void sock_udp_close(sock_t * sock) {
|
static void sock_udp_close(sock_t * sock) {
|
||||||
if (sock->priv[0] && udp_sockets) {
|
if (sock->priv[0] && udp_sockets) {
|
||||||
|
@ -272,14 +301,182 @@ static int udp_socket(void) {
|
||||||
return process_append_fd((process_t *)this_core->current_process, (fs_node_t *)sock);
|
return process_append_fd((process_t *)this_core->current_process, (fs_node_t *)sock);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static spin_lock_t tcp_port_lock = {0};
|
||||||
|
static void sock_tcp_close(sock_t * sock) {
|
||||||
|
if (sock->priv[0] && tcp_sockets) {
|
||||||
|
printf("tcp: removing port %d from bound map\n", sock->priv[0]);
|
||||||
|
spin_lock(tcp_port_lock);
|
||||||
|
hashmap_remove(tcp_sockets, (void*)(uintptr_t)sock->priv[0]);
|
||||||
|
spin_unlock(tcp_port_lock);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
static int next_tcp_port = 12345;
|
||||||
|
static int tcp_get_port(sock_t * sock) {
|
||||||
|
spin_lock(tcp_port_lock);
|
||||||
|
int out = next_tcp_port++;
|
||||||
|
if (!tcp_sockets) {
|
||||||
|
tcp_sockets = hashmap_create_int(10);
|
||||||
|
}
|
||||||
|
hashmap_set(tcp_sockets, (void*)(uintptr_t)out, sock);
|
||||||
|
sock->priv[0] = out;
|
||||||
|
spin_unlock(tcp_port_lock);
|
||||||
|
return out;
|
||||||
|
}
|
||||||
|
|
||||||
|
static long sock_tcp_recv(sock_t * sock, struct msghdr * msg, int flags) {
|
||||||
|
printf("tcp: recv called\n");
|
||||||
|
if (!sock->priv[0]) {
|
||||||
|
printf("tcp: recv() but socket has no port\n");
|
||||||
|
return -EINVAL;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (msg->msg_iovlen > 1) {
|
||||||
|
printf("net: todo: can't recv multiple iovs\n");
|
||||||
|
return -ENOTSUP;
|
||||||
|
}
|
||||||
|
if (msg->msg_iovlen == 0) return 0;
|
||||||
|
|
||||||
|
struct ipv4_packet * data = net_sock_get(sock);
|
||||||
|
printf("tcp: got response, size is %u\n",
|
||||||
|
ntohs(data->length));
|
||||||
|
free(data);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
uint16_t calculate_tcp_checksum(struct tcp_check_header * p, struct tcp_header * h, void * d, size_t payload_size) {
|
||||||
|
uint32_t sum = 0;
|
||||||
|
uint16_t * s = (uint16_t *)p;
|
||||||
|
|
||||||
|
/* TODO: Checksums for options? */
|
||||||
|
for (int i = 0; i < 6; ++i) {
|
||||||
|
sum += ntohs(s[i]);
|
||||||
|
if (sum > 0xFFFF) {
|
||||||
|
sum = (sum >> 16) + (sum & 0xFFFF);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
s = (uint16_t *)h;
|
||||||
|
for (int i = 0; i < 10; ++i) {
|
||||||
|
sum += ntohs(s[i]);
|
||||||
|
if (sum > 0xFFFF) {
|
||||||
|
sum = (sum >> 16) + (sum & 0xFFFF);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
uint16_t d_words = payload_size / 2;
|
||||||
|
|
||||||
|
s = (uint16_t *)d;
|
||||||
|
for (unsigned int i = 0; i < d_words; ++i) {
|
||||||
|
sum += ntohs(s[i]);
|
||||||
|
if (sum > 0xFFFF) {
|
||||||
|
sum = (sum >> 16) + (sum & 0xFFFF);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
if (d_words * 2 != payload_size) {
|
||||||
|
uint8_t * t = (uint8_t *)d;
|
||||||
|
uint8_t tmp[2];
|
||||||
|
tmp[0] = t[d_words * sizeof(uint16_t)];
|
||||||
|
tmp[1] = 0;
|
||||||
|
|
||||||
|
uint16_t * f = (uint16_t *)tmp;
|
||||||
|
|
||||||
|
sum += ntohs(f[0]);
|
||||||
|
if (sum > 0xFFFF) {
|
||||||
|
sum = (sum >> 16) + (sum & 0xFFFF);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return ~(sum & 0xFFFF) & 0xFFFF;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
static long sock_tcp_connect(sock_t * sock, const struct sockaddr *addr, socklen_t addrlen) {
|
||||||
|
const struct sockaddr_in * dest = (const struct sockaddr_in *)addr;
|
||||||
|
char deststr[16];
|
||||||
|
ip_ntoa(ntohl(dest->sin_addr.s_addr), deststr);
|
||||||
|
printf("tcp: connect requested to %s port %d\n", deststr, ntohs(dest->sin_port));
|
||||||
|
|
||||||
|
if (sock->priv[1] != 0) {
|
||||||
|
printf("tcp: socket is already connected?\n");
|
||||||
|
return -EINVAL;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Get a port */
|
||||||
|
tcp_get_port(sock);
|
||||||
|
printf("tcp: connecting from ephemeral port %d\n", (int)sock->priv[0]);
|
||||||
|
|
||||||
|
/* Mark as awaiting connection, send initial SYN */
|
||||||
|
sock->priv[1] = 1;
|
||||||
|
|
||||||
|
fs_node_t * nic = net_if_any();
|
||||||
|
|
||||||
|
size_t total_length = sizeof(struct ipv4_packet) + sizeof(struct tcp_header);
|
||||||
|
|
||||||
|
struct ipv4_packet * response = malloc(total_length);
|
||||||
|
response->length = htons(total_length);
|
||||||
|
response->destination = dest->sin_addr.s_addr;
|
||||||
|
response->source = ((struct EthernetDevice*)nic->device)->ipv4_addr;
|
||||||
|
response->ttl = 64;
|
||||||
|
response->protocol = IPV4_PROT_TCP;
|
||||||
|
response->ident = 0;
|
||||||
|
response->flags_fragment = htons(0x4000);
|
||||||
|
response->version_ihl = 0x45;
|
||||||
|
response->dscp_ecn = 0;
|
||||||
|
response->checksum = 0;
|
||||||
|
response->checksum = htons(calculate_ipv4_checksum(response));
|
||||||
|
|
||||||
|
/* Stick TCP header into payload */
|
||||||
|
struct tcp_header * tcp_header = (struct tcp_header*)&response->payload;
|
||||||
|
tcp_header->source_port = htons(sock->priv[0]);
|
||||||
|
tcp_header->destination_port = dest->sin_port;
|
||||||
|
tcp_header->seq_number = 0;
|
||||||
|
tcp_header->ack_number = 0;
|
||||||
|
tcp_header->flags = htons((1 << 1) | 0x5000);
|
||||||
|
tcp_header->window_size = htons(1548-54);
|
||||||
|
tcp_header->checksum = 0;
|
||||||
|
tcp_header->urgent = 0;
|
||||||
|
|
||||||
|
/* Calculate checksum */
|
||||||
|
struct tcp_check_header check_hd = {
|
||||||
|
.source = response->source,
|
||||||
|
.destination = response->destination,
|
||||||
|
.zeros = 0,
|
||||||
|
.protocol = IPV4_PROT_TCP,
|
||||||
|
.tcp_len = htons(sizeof(struct tcp_header)),
|
||||||
|
};
|
||||||
|
|
||||||
|
tcp_header->checksum = htons(calculate_tcp_checksum(&check_hd, tcp_header, NULL, 0));
|
||||||
|
|
||||||
|
/* TODO: enqueue tcp packet for potential redelivery */
|
||||||
|
|
||||||
|
net_eth_send((struct EthernetDevice*)nic->device, ntohs(response->length), response, ETHERNET_TYPE_IPV4, ETHERNET_BROADCAST_MAC);
|
||||||
|
|
||||||
|
free(response);
|
||||||
|
|
||||||
|
/* wait for signal that we connected or timed out */
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int tcp_socket(void) {
|
||||||
|
printf("tcp socket...\n");
|
||||||
|
sock_t * sock = net_sock_create();
|
||||||
|
sock->sock_recv = sock_tcp_recv;
|
||||||
|
sock->sock_send = sock_tcp_send;
|
||||||
|
sock->sock_close = sock_tcp_close;
|
||||||
|
sock->sock_connect = sock_tcp_connect;
|
||||||
|
return process_append_fd((process_t *)this_core->current_process, (fs_node_t *)sock);
|
||||||
|
}
|
||||||
|
|
||||||
long net_ipv4_socket(int type, int protocol) {
|
long net_ipv4_socket(int type, int protocol) {
|
||||||
/* Ignore protocol, make socket for 'type' only... */
|
/* Ignore protocol, make socket for 'type' only... */
|
||||||
switch (type) {
|
switch (type) {
|
||||||
case SOCK_DGRAM:
|
case SOCK_DGRAM:
|
||||||
return udp_socket();
|
return udp_socket();
|
||||||
case SOCK_STREAM:
|
case SOCK_STREAM:
|
||||||
printf("tcp socket...\n");
|
return tcp_socket();
|
||||||
return -EINVAL;
|
|
||||||
default:
|
default:
|
||||||
return -EINVAL;
|
return -EINVAL;
|
||||||
}
|
}
|
||||||
|
|
|
@ -217,7 +217,9 @@ long net_listen(int sockfd, int backlog) {
|
||||||
|
|
||||||
long net_connect(int sockfd, const struct sockaddr *addr, socklen_t addrlen) {
|
long net_connect(int sockfd, const struct sockaddr *addr, socklen_t addrlen) {
|
||||||
if (!FD_CHECK(sockfd)) return -EBADF;
|
if (!FD_CHECK(sockfd)) return -EBADF;
|
||||||
return -EINVAL;
|
sock_t * node = (sock_t*)FD_ENTRY(sockfd);
|
||||||
|
if (!node->sock_connect) return -EINVAL;
|
||||||
|
return node->sock_connect(node,addr,addrlen);
|
||||||
}
|
}
|
||||||
|
|
||||||
long net_recv(int sockfd, struct msghdr * msg, int flags) {
|
long net_recv(int sockfd, struct msghdr * msg, int flags) {
|
||||||
|
|
|
@ -8,6 +8,7 @@
|
||||||
#include <string.h>
|
#include <string.h>
|
||||||
#include <fcntl.h>
|
#include <fcntl.h>
|
||||||
#include <unistd.h>
|
#include <unistd.h>
|
||||||
|
#include <poll.h>
|
||||||
#include <sys/ioctl.h>
|
#include <sys/ioctl.h>
|
||||||
#include <sys/types.h>
|
#include <sys/types.h>
|
||||||
#include <sys/socket.h>
|
#include <sys/socket.h>
|
||||||
|
@ -228,7 +229,6 @@ struct hostent * gethostbyname(const char * name) {
|
||||||
|
|
||||||
/* Try to convert so we can connect... */
|
/* Try to convert so we can connect... */
|
||||||
uint32_t ns_addr = ip_aton(tmp + strlen("nameserver "));
|
uint32_t ns_addr = ip_aton(tmp + strlen("nameserver "));
|
||||||
fprintf(stderr, "gethostbyname: asking %#x\n", ns_addr);
|
|
||||||
|
|
||||||
/* Form a DNS request */
|
/* Form a DNS request */
|
||||||
char dat[256];
|
char dat[256];
|
||||||
|
@ -241,8 +241,6 @@ struct hostent * gethostbyname(const char * name) {
|
||||||
req->authorities = htons(0);
|
req->authorities = htons(0);
|
||||||
req->additional = htons(0);
|
req->additional = htons(0);
|
||||||
|
|
||||||
fprintf(stderr, "gethostbyname: Frobbing bits...\n");
|
|
||||||
|
|
||||||
/* Turn requested name into DNS request */
|
/* Turn requested name into DNS request */
|
||||||
ssize_t i = 0;
|
ssize_t i = 0;
|
||||||
const char * c = name;
|
const char * c = name;
|
||||||
|
@ -250,7 +248,6 @@ struct hostent * gethostbyname(const char * name) {
|
||||||
const char * n = strchr(c,'.');
|
const char * n = strchr(c,'.');
|
||||||
if (!n) n = c + strlen(c);
|
if (!n) n = c + strlen(c);
|
||||||
ssize_t len = n - c;
|
ssize_t len = n - c;
|
||||||
fprintf(stderr, "gethostbyname: segment of len %zd\n", len);
|
|
||||||
req->data[i++] = len;
|
req->data[i++] = len;
|
||||||
for (; c < n; ++c, ++i) {
|
for (; c < n; ++c, ++i) {
|
||||||
req->data[i] = *c;
|
req->data[i] = *c;
|
||||||
|
@ -274,17 +271,27 @@ struct hostent * gethostbyname(const char * name) {
|
||||||
return NULL;
|
return NULL;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
/* Wait for a response, but don't wait too long. */
|
||||||
|
struct pollfd fds[1];
|
||||||
|
fds[0].fd = sock;
|
||||||
|
fds[0].events = POLLIN;
|
||||||
|
int ret = poll(fds,1,2000); /* Two seconds? Is that okay? */
|
||||||
|
if (ret < 0) {
|
||||||
|
fprintf(stderr, "gethostbyname: timed out\n");
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
|
||||||
char buf[1550];
|
char buf[1550];
|
||||||
/* TODO timeout... */
|
|
||||||
ssize_t len = recv(sock, buf, 1550, 0);
|
ssize_t len = recv(sock, buf, 1550, 0);
|
||||||
|
close(sock);
|
||||||
|
|
||||||
if (len < 0) {
|
if (len < 0) {
|
||||||
fprintf(stderr, "gethostbyname: failed to recv\n");
|
fprintf(stderr, "gethostbyname: failed to recv\n");
|
||||||
return NULL;
|
return NULL;
|
||||||
}
|
}
|
||||||
|
|
||||||
/* Now examine the response */
|
|
||||||
fprintf(stderr, "gethostbyname: response from server\n");
|
|
||||||
|
|
||||||
|
/* Now examine the response */
|
||||||
struct dns_packet * response = (struct dns_packet *)&buf;
|
struct dns_packet * response = (struct dns_packet *)&buf;
|
||||||
|
|
||||||
if (ntohs(response->answers) == 0) {
|
if (ntohs(response->answers) == 0) {
|
||||||
|
@ -292,11 +299,6 @@ struct hostent * gethostbyname(const char * name) {
|
||||||
return NULL;
|
return NULL;
|
||||||
}
|
}
|
||||||
|
|
||||||
fprintf(stderr, "gethostbyname: got %d answers\n", ntohs(response->answers));
|
|
||||||
|
|
||||||
/* XXX Just kinda blindly assume the answer is at the end */
|
|
||||||
fprintf(stderr, "packet is of len %d, so answer must be %x\n", (int)len, *(uint32_t*)(buf+len-4));
|
|
||||||
|
|
||||||
/* Get a return value */
|
/* Get a return value */
|
||||||
_hostent.h_name = name;
|
_hostent.h_name = name;
|
||||||
_hostent.h_aliases = NULL;
|
_hostent.h_aliases = NULL;
|
||||||
|
|
Loading…
Reference in New Issue