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ARP lookup hosts in the same net. Use up-to-date code in zephyr dash example

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This commit is contained in:
cpq 2022-11-02 23:30:31 +00:00
parent 10c09a361b
commit efec738c89
7 changed files with 1506 additions and 2596 deletions
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4
examples/zephyr/device-dashboard/Makefile
View File

@ -24,7 +24,9 @@ example:
true
build:
cp $(MONGOOSE_ROOT)/mongoose.[c,h] src/
cp $(MONGOOSE_ROOT)/mongoose.[ch] src/
cp $(MONGOOSE_ROOT)/examples/device-dashboard/net.c src/
cp $(MONGOOSE_ROOT)/examples/device-dashboard/packed_fs.c src/
$(DOCKER) $(REPO) /bin/sh -c 'cd $(DOCKER_ZEPHYR_PATH)/zephyr && \
west build -b $(BOARD) -p auto $(DOCKER_PROJECT_PATH) $(OVERLAY) --build-dir $(DOCKER_PROJECT_PATH)/build'

153
examples/zephyr/device-dashboard/src/mongoose.c
View File

@ -1349,6 +1349,7 @@ struct mg_fs mg_fs_posix = {p_stat, p_list, p_open, p_close, p_read,
// Chunk deletion marker is the MSB in the "processed" counter
#define MG_DMARK ((size_t) 1 << (sizeof(size_t) * 8 - 1))
@ -1694,7 +1695,9 @@ static void static_cb(struct mg_connection *c, int ev, void *ev_data,
if (ev == MG_EV_WRITE || ev == MG_EV_POLL) {
struct mg_fd *fd = (struct mg_fd *) fn_data;
// Read to send IO buffer directly, avoid extra on-stack buffer
size_t n, max = MG_IO_SIZE, space, *cl = (size_t *) c->label;
size_t n, max = MG_IO_SIZE, space;
size_t *cl = (size_t *) &c->label[(sizeof(c->label) - sizeof(size_t)) /
sizeof(size_t) * sizeof(size_t)];
if (c->send.size < max) mg_iobuf_resize(&c->send, max);
if (c->send.len >= c->send.size) return; // Rate limit
if ((space = c->send.size - c->send.len) > *cl) space = *cl;
@ -1865,9 +1868,12 @@ void mg_http_serve_file(struct mg_connection *c, struct mg_http_message *hm,
c->is_resp = 0;
mg_fs_close(fd);
} else {
// Track to-be-sent content length at the end of c->label, aligned
size_t *clp = (size_t *) &c->label[(sizeof(c->label) - sizeof(size_t)) /
sizeof(size_t) * sizeof(size_t)];
c->pfn = static_cb;
c->pfn_data = fd;
*(size_t *) c->label = (size_t) cl; // Track to-be-sent content length
*clp = (size_t) cl;
}
}
}
@ -2237,7 +2243,7 @@ static void deliver_chunked_chunks(struct mg_connection *c, size_t hlen,
ofs += pl + dl + 2, del += pl + 2; // 2 is for \r\n suffix
processed += dl;
if (c->recv.len != saved) processed -= dl, buf -= dl;
mg_hexdump(c->recv.buf, hlen + processed);
// mg_hexdump(c->recv.buf, hlen + processed);
last = (dl == 0);
}
mg_iobuf_del(&c->recv, hlen + processed, del);
@ -2310,6 +2316,34 @@ static void http_cb(struct mg_connection *c, int ev, void *evd, void *fnd) {
(void) evd, (void) fnd;
}
static void mg_hfn(struct mg_connection *c, int ev, void *ev_data, void *fnd) {
if (ev == MG_EV_HTTP_MSG) {
struct mg_http_message *hm = (struct mg_http_message *) ev_data;
if (mg_http_match_uri(hm, "/quit")) {
mg_http_reply(c, 200, "", "ok\n");
c->is_draining = 1;
c->label[0] = 'X';
} else if (mg_http_match_uri(hm, "/debug")) {
int level = (int) mg_json_get_long(hm->body, "$.level", MG_LL_DEBUG);
mg_log_set(level);
mg_http_reply(c, 200, "", "Debug level set to %d\n", level);
} else {
mg_http_reply(c, 200, "", "hi\n");
}
} else if (ev == MG_EV_CLOSE) {
if (c->label[0] == 'X') *(bool *) fnd = true;
}
}
void mg_hello(const char *url) {
struct mg_mgr mgr;
bool done = false;
mg_mgr_init(&mgr);
if (mg_http_listen(&mgr, url, mg_hfn, &done) == NULL) done = true;
while (done == false) mg_mgr_poll(&mgr, 100);
mg_mgr_free(&mgr);
}
struct mg_connection *mg_http_connect(struct mg_mgr *mgr, const char *url,
mg_event_handler_t fn, void *fn_data) {
struct mg_connection *c = mg_connect(mgr, url, fn, fn_data);
@ -3432,6 +3466,7 @@ struct mg_connection *mg_connect(struct mg_mgr *mgr, const char *url,
} else {
LIST_ADD_HEAD(struct mg_connection, &mgr->conns, c);
c->is_udp = (strncmp(url, "udp:", 4) == 0);
c->fd = (void *) (size_t) -1; // Set to INVALID_SOCKET
c->fn = fn;
c->is_client = true;
c->fn_data = fn_data;
@ -4127,14 +4162,12 @@ static void mg_set_non_blocking_mode(SOCKET fd) {
fcntl(fd, F_SETFL, O_NONBLOCK);
#elif MG_ARCH == MG_ARCH_TIRTOS
int val = 0;
setsockopt(fd, 0, SO_BLOCKING, &val, sizeof(val));
int status = 0;
int res = SockStatus(fd, FDSTATUS_SEND, &status);
if (res == 0 && status > 0) {
val = status / 2;
int val_size = sizeof(val);
res = SockSet(fd, SOL_SOCKET, SO_SNDLOWAT, &val, val_size);
}
setsockopt(fd, SOL_SOCKET, SO_BLOCKING, &val, sizeof(val));
// SPRU524J section 3.3.3 page 63, SO_SNDLOWAT
int sz = sizeof(val);
getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &val, &sz);
val /= 2; // set send low-water mark at half send buffer size
setsockopt(fd, SOL_SOCKET, SO_SNDLOWAT, &val, sizeof(val));
#else
fcntl(fd, F_SETFL, fcntl(fd, F_GETFL, 0) | O_NONBLOCK); // Non-blocking mode
fcntl(fd, F_SETFD, FD_CLOEXEC); // Set close-on-exec
@ -4298,6 +4331,11 @@ void mg_connect_resolved(struct mg_connection *c) {
mg_error(c, "socket(): %d", MG_SOCK_ERRNO);
} else if (c->is_udp) {
MG_EPOLL_ADD(c);
#if MG_ARCH == MG_ARCH_TIRTOS
union usa usa; // TI-RTOS NDK requires binding to receive on UDP sockets
socklen_t slen = tousa(&c->loc, &usa);
if (bind(c->fd, &usa.sa, slen) != 0) MG_ERROR(("bind: %d", MG_SOCK_ERRNO));
#endif
mg_call(c, MG_EV_RESOLVE, NULL);
mg_call(c, MG_EV_CONNECT, NULL);
} else {
@ -4317,6 +4355,7 @@ void mg_connect_resolved(struct mg_connection *c) {
mg_error(c, "connect: %d", MG_SOCK_ERRNO);
}
}
(void) rc;
}
static SOCKET raccept(SOCKET sock, union usa *usa, socklen_t len) {
@ -5325,11 +5364,13 @@ void mg_tls_init(struct mg_connection *c, const struct mg_tls_opts *opts) {
}
}
if (opts->ciphers != NULL) SSL_set_cipher_list(tls->ssl, opts->ciphers);
#if OPENSSL_VERSION_NUMBER >= 0x10100000L
if (opts->srvname.len > 0) {
char *s = mg_mprintf("%.*s", (int) opts->srvname.len, opts->srvname.ptr);
SSL_set1_host(tls->ssl, s);
free(s);
}
#endif
c->tls = tls;
c->is_tls = 1;
c->is_tls_hs = 1;
@ -5585,6 +5626,8 @@ uint64_t mg_millis(void) {
return xTaskGetTickCount() * portTICK_PERIOD_MS;
#elif MG_ARCH == MG_ARCH_AZURERTOS
return tx_time_get() * (1000 /* MS per SEC */ / TX_TIMER_TICKS_PER_SECOND);
#elif MG_ARCH == MG_ARCH_TIRTOS
return (uint64_t) Clock_getTicks();
#elif MG_ARCH == MG_ARCH_ZEPHYR
return (uint64_t) k_uptime_get();
#elif MG_ARCH == MG_ARCH_UNIX && defined(__APPLE__)
@ -5812,9 +5855,10 @@ static void mg_ws_cb(struct mg_connection *c, int ev, void *ev_data,
if (final) mg_call(c, MG_EV_WS_MSG, &m);
break;
case WEBSOCKET_OP_CLOSE:
MG_DEBUG(("%lu Got WS CLOSE", c->id));
MG_DEBUG(("%lu WS CLOSE", c->id));
mg_call(c, MG_EV_WS_CTL, &m);
mg_ws_send(c, "", 0, WEBSOCKET_OP_CLOSE);
// Echo the payload of the received CLOSE message back to the sender
mg_ws_send(c, m.data.ptr, m.data.len, WEBSOCKET_OP_CLOSE);
c->is_draining = 1;
break;
default:
@ -6089,7 +6133,7 @@ static bool mip_driver_stm32_init(uint8_t *mac, void *userdata) {
// Set MDC clock divider. If user told us the value, use it. Otherwise, guess
int cr = (d == NULL || d->mdc_cr < 0) ? guess_mdc_cr() : d->mdc_cr;
ETH->MACMIIAR = ((uint32_t)cr & 3) << 2;
ETH->MACMIIAR = ((uint32_t)cr & 7) << 2;
// NOTE(cpq): we do not use extended descriptor bit 7, and do not use
// hardware checksum. Therefore, descriptor size is 4, not 8
@ -6564,6 +6608,13 @@ static void arp_cache_add(struct mip_if *ifp, uint32_t ip, uint8_t mac[6]) {
mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]));
}
static size_t ether_output(struct mip_if *ifp, size_t len) {
// size_t min = 64; // Pad short frames to 64 bytes (minimum Ethernet size)
// if (len < min) memset(ifp->tx.buf + len, 0, min - len), len = min;
// mg_hexdump(ifp->tx.buf, len);
return ifp->driver->tx(ifp->tx.buf, len, ifp->driver_data);
}
static void arp_ask(struct mip_if *ifp, uint32_t ip) {
struct eth *eth = (struct eth *) ifp->tx.buf;
struct arp *arp = (struct arp *) (eth + 1);
@ -6575,7 +6626,7 @@ static void arp_ask(struct mip_if *ifp, uint32_t ip) {
arp->plen = 4;
arp->op = mg_htons(1), arp->tpa = ip, arp->spa = ifp->ip;
memcpy(arp->sha, ifp->mac, sizeof(arp->sha));
ifp->driver->tx(eth, PDIFF(eth, arp + 1), ifp->driver_data);
ether_output(ifp, PDIFF(eth, arp + 1));
}
static size_t mg_print_ipv4(mg_pfn_t fn, void *fn_data, va_list *ap) {
@ -6601,11 +6652,12 @@ static struct ip *tx_ip(struct mip_if *ifp, uint8_t proto, uint32_t ip_src,
uint32_t ip_dst, size_t plen) {
struct eth *eth = (struct eth *) ifp->tx.buf;
struct ip *ip = (struct ip *) (eth + 1);
uint8_t *mac = arp_cache_find(ifp, ip_dst); // Dst IP in ARP cache ?
if (!mac) mac = arp_cache_find(ifp, ifp->gw); // No, use gateway
if (mac) memcpy(eth->dst, mac, sizeof(eth->dst)); // Found? Use it
if (!mac) memset(eth->dst, 255, sizeof(eth->dst)); // No? Use broadcast
memcpy(eth->src, ifp->mac, sizeof(eth->src)); // TODO(cpq): ARP lookup
uint8_t *mac = arp_cache_find(ifp, ip_dst); // Dst IP in ARP cache ?
if (!mac && (ip_dst & ifp->mask)) arp_ask(ifp, ip_dst); // Same net, lookup
if (!mac) mac = arp_cache_find(ifp, ifp->gw); // Use gateway MAC
if (mac) memcpy(eth->dst, mac, sizeof(eth->dst)); // Found? Use it
if (!mac) memset(eth->dst, 255, sizeof(eth->dst)); // No? Use broadcast
memcpy(eth->src, ifp->mac, sizeof(eth->src)); // TODO(cpq): ARP lookup
eth->type = mg_htons(0x800);
memset(ip, 0, sizeof(*ip));
ip->ver = 0x45; // Version 4, header length 5 words
@ -6637,24 +6689,11 @@ static void tx_udp(struct mip_if *ifp, uint32_t ip_src, uint16_t sport,
udp->csum = csumfin(cs);
memmove(udp + 1, buf, len);
// MG_DEBUG(("UDP LEN %d %d", (int) len, (int) ifp->frame_len));
ifp->driver->tx(ifp->tx.buf,
sizeof(struct eth) + sizeof(*ip) + sizeof(*udp) + len,
ifp->driver_data);
ether_output(ifp, sizeof(struct eth) + sizeof(*ip) + sizeof(*udp) + len);
}
static void tx_dhcp(struct mip_if *ifp, uint32_t src, uint32_t dst,
uint8_t *opts, size_t optslen) {
#if 0
struct dhcp {
uint8_t op, htype, hlen, hops;
uint32_t xid;
uint16_t secs, flags;
uint32_t ciaddr, yiaddr, siaddr, giaddr;
uint8_t hwaddr[208];
uint32_t magic;
uint8_t options[32];
};
#endif
struct dhcp dhcp = {1, 1, 6, 0, 0, 0, 0, 0, 0, 0, 0, {0}, 0, {0}};
dhcp.magic = mg_htonl(0x63825363);
memcpy(&dhcp.hwaddr, ifp->mac, sizeof(ifp->mac));
@ -6703,7 +6742,7 @@ static void rx_arp(struct mip_if *ifp, struct pkt *pkt) {
arp->tpa = pkt->arp->spa;
arp->spa = ifp->ip;
MG_DEBUG(("ARP response: we're %#lx", (long) mg_ntohl(ifp->ip)));
ifp->driver->tx(ifp->tx.buf, PDIFF(eth, arp + 1), ifp->driver_data);
ether_output(ifp, PDIFF(eth, arp + 1));
} else if (pkt->arp->op == mg_htons(2)) {
if (memcmp(pkt->arp->tha, ifp->mac, sizeof(pkt->arp->tha)) != 0) return;
// MG_INFO(("ARP RESPONSE"));
@ -6714,15 +6753,16 @@ static void rx_arp(struct mip_if *ifp, struct pkt *pkt) {
static void rx_icmp(struct mip_if *ifp, struct pkt *pkt) {
// MG_DEBUG(("ICMP %d", (int) len));
if (pkt->icmp->type == 8 && pkt->ip != NULL && pkt->ip->dst == ifp->ip) {
struct ip *ip = tx_ip(ifp, 1, ifp->ip, pkt->ip->src,
sizeof(struct icmp) + pkt->pay.len);
size_t hlen = sizeof(struct eth) + sizeof(struct ip) + sizeof(struct icmp);
size_t space = ifp->tx.len - hlen, plen = pkt->pay.len;
if (plen > space) plen = space;
struct ip *ip =
tx_ip(ifp, 1, ifp->ip, pkt->ip->src, sizeof(struct icmp) + plen);
struct icmp *icmp = (struct icmp *) (ip + 1);
size_t len = PDIFF(ifp->tx.buf, icmp + 1), left = ifp->tx.len - len;
if (left > pkt->pay.len) left = pkt->pay.len; // Don't overflow TX
memset(icmp, 0, sizeof(*icmp)); // Set csum to 0
memcpy(icmp + 1, pkt->pay.buf, left); // Copy RX payload to TX
icmp->csum = ipcsum(icmp, sizeof(*icmp) + left);
ifp->driver->tx(ifp->tx.buf, len + left, ifp->driver_data);
memset(icmp, 0, sizeof(*icmp)); // Set csum to 0
memcpy(icmp + 1, pkt->pay.buf, plen); // Copy RX payload to TX
icmp->csum = ipcsum(icmp, sizeof(*icmp) + plen);
ether_output(ifp, hlen + plen);
}
}
@ -6806,8 +6846,7 @@ static size_t tx_tcp(struct mip_if *ifp, uint32_t dst_ip, uint8_t flags,
cs = csumup(cs, &ip->dst, sizeof(ip->dst));
cs = csumup(cs, pseudo, sizeof(pseudo));
tcp->csum = csumfin(cs);
return ifp->driver->tx(ifp->tx.buf, PDIFF(ifp->tx.buf, tcp + 1) + len,
ifp->driver_data);
return ether_output(ifp, PDIFF(ifp->tx.buf, tcp + 1) + len);
}
static size_t tx_tcp_pkt(struct mip_if *ifp, struct pkt *pkt, uint8_t flags,
@ -6876,16 +6915,17 @@ long mg_io_recv(struct mg_connection *c, void *buf, size_t len) {
static void read_conn(struct mg_connection *c, struct pkt *pkt) {
struct connstate *s = (struct connstate *) (c + 1);
struct mg_iobuf *io = c->is_tls ? &s->raw : &c->recv;
uint32_t seq = mg_ntohl(pkt->tcp->seq);
s->raw.align = c->recv.align;
if (pkt->tcp->flags & TH_FIN) {
s->ack = mg_htonl(pkt->tcp->seq) + 1, s->seq = mg_htonl(pkt->tcp->ack);
c->is_closing = 1;
} else if (pkt->pay.len == 0) {
// TODO(cpq): handle this peer's ACK
} else if (mg_ntohl(pkt->tcp->seq) != s->ack) {
} else if (seq != s->ack) {
// TODO(cpq): peer sent us SEQ which we don't expect. Retransmit rather
// than close this connection
mg_error(c, "SEQ != ACK: %x %x", mg_ntohl(pkt->tcp->seq), s->ack);
mg_error(c, "SEQ != ACK: %x %x", seq, s->ack);
} else if (io->size - io->len < pkt->pay.len &&
!mg_iobuf_resize(io, io->len + pkt->pay.len)) {
mg_error(c, "oom");
@ -6897,9 +6937,18 @@ static void read_conn(struct mg_connection *c, struct pkt *pkt) {
// call back mg_io_recv() which grabs raw data from s->raw
memcpy(&io->buf[io->len], pkt->pay.buf, pkt->pay.len);
io->len += pkt->pay.len;
// Advance ACK counter and setup a timer to send an ACK back
MG_DEBUG(("%lu SEQ %x -> %x", c->id, mg_htonl(pkt->tcp->seq), s->ack));
s->ack = (uint32_t) (mg_htonl(pkt->tcp->seq) + pkt->pay.len);
#if 1
// Send ACK immediately
MG_DEBUG((" imm ACK", c->id, mg_htonl(pkt->tcp->seq), s->ack));
tx_tcp((struct mip_if *) c->mgr->priv, c->rem.ip, TH_ACK, c->loc.port,
c->rem.port, mg_htonl(s->seq), mg_htonl(s->ack), "", 0);
#else
// Advance ACK counter and setup a timer to send an ACK back
settmout(c, MIP_TTYPE_ACK);
#endif
if (c->is_tls) {
// TLS connection. Make room for decrypted data in c->recv
@ -6967,7 +7016,7 @@ static void rx_tcp(struct mip_if *ifp, struct pkt *pkt) {
}
static void rx_ip(struct mip_if *ifp, struct pkt *pkt) {
// MG_DEBUG(("IP %d", (int) pkt->pay.len));
// MG_DEBUG(("IP %d", (int) pkt->pay.len));
if (pkt->ip->proto == 1) {
pkt->icmp = (struct icmp *) (pkt->ip + 1);
if (pkt->pay.len < sizeof(*pkt->icmp)) return;
@ -7039,6 +7088,10 @@ static void mip_rx(struct mip_if *ifp, void *buf, size_t len) {
pkt.ip = (struct ip *) (pkt.eth + 1);
if (pkt.raw.len < sizeof(*pkt.eth) + sizeof(*pkt.ip)) return; // Truncated
if ((pkt.ip->ver >> 4) != 4) return; // Not IP
// MG_DEBUG(("%u %u", mg_ntohs(pkt.ip->len) + 14, pkt.raw.len));
if ((size_t) mg_ntohs(pkt.ip->len) + 14 < pkt.raw.len) {
pkt.raw.len -= pkt.raw.len - (mg_ntohs(pkt.ip->len) + 14);
}
mkpay(&pkt, pkt.ip + 1);
rx_ip(ifp, &pkt);
} else {
@ -7091,7 +7144,7 @@ static void mip_poll(struct mip_if *ifp, uint64_t uptime_ms) {
struct connstate *s = (struct connstate *) (c + 1);
if (uptime_ms > s->timer) {
if (s->ttype == MIP_TTYPE_ACK) {
MG_DEBUG(("%lu ack", c->id));
MG_DEBUG(("%lu ack %x %x", c->id, s->seq, s->ack));
tx_tcp(ifp, c->rem.ip, TH_ACK, c->loc.port, c->rem.port,
mg_htonl(s->seq), mg_htonl(s->ack), "", 0);
} else {

19
examples/zephyr/device-dashboard/src/mongoose.h
View File

@ -49,19 +49,19 @@ extern "C" {
#define MG_ARCH MG_ARCH_WIN32
#elif defined(ICACHE_FLASH) || defined(ICACHE_RAM_ATTR)
#define MG_ARCH MG_ARCH_ESP8266
#elif defined(__ZEPHYR__)
#define MG_ARCH MG_ARCH_ZEPHYR
#elif defined(ESP_PLATFORM)
#define MG_ARCH MG_ARCH_ESP32
#elif defined(FREERTOS_IP_H)
#define MG_ARCH MG_ARCH_FREERTOS_TCP
#elif defined(AZURE_RTOS_THREADX)
#define MG_ARCH MG_ARCH_AZURERTOS
#elif defined(__ZEPHYR__)
#define MG_ARCH MG_ARCH_ZEPHYR
#elif defined(PICO_TARGET_NAME)
#define MG_ARCH MG_ARCH_RP2040
#endif
#if !defined(MG_ARCH)
#if !defined(MG_ARCH) || (MG_ARCH == MG_ARCH_CUSTOM)
#include "mongoose_custom.h" // keep this include
#endif
@ -293,6 +293,12 @@ struct timeval {
#define EINTR pdFREERTOS_ERRNO_EINTR
#endif
// FreeRTOS-TCP uses non-standard semantics for listen() backlog size. It is
// not a backlog size for pending SYN connections, but a max socket number
#ifndef MG_SOCK_LISTEN_BACKLOG_SIZE
#define MG_SOCK_LISTEN_BACKLOG_SIZE 128
#endif
#endif // MG_ARCH == MG_ARCH_FREERTOS_TCP
@ -414,13 +420,11 @@ struct timeval {
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <time.h>
#include <errno.h>
#include <serrno.h>
#include <sys/socket.h>
extern int SockStatus(SOCKET hSock, int request, int *results );
extern int SockSet(SOCKET hSock, int Type, int Prop, void *pbuf, int size);
#include <ti/sysbios/knl/Clock.h>
#endif
@ -1174,6 +1178,7 @@ void mg_http_bauth(struct mg_connection *, const char *user, const char *pass);
struct mg_str mg_http_get_header_var(struct mg_str s, struct mg_str v);
size_t mg_http_next_multipart(struct mg_str, size_t, struct mg_http_part *);
int mg_http_status(const struct mg_http_message *hm);
void mg_hello(const char *url);
void mg_http_serve_ssi(struct mg_connection *c, const char *root,

4
examples/zephyr/device-dashboard/src/net.c
View File

@ -170,6 +170,10 @@ void device_dashboard_fn(struct mg_connection *c, int ev, void *ev_data,
// u ? u->name : "NULL"));
if (mg_http_match_uri(hm, "/api/hi")) {
mg_http_reply(c, 200, "", "hi\n"); // Testing endpoint
} else if (mg_http_match_uri(hm, "/api/debug")) {
int level = mg_json_get_long(hm->body, "$.level", MG_LL_DEBUG);
mg_log_set(level);
mg_http_reply(c, 200, "", "Debug level set to %d\n", level);
} else if (u == NULL && mg_http_match_uri(hm, "/api/#")) {
// All URIs starting with /api/ must be authenticated
mg_http_reply(c, 403, "", "Denied\n");

3760
examples/zephyr/device-dashboard/src/packed_fs.c
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File diff suppressed because it is too large Load Diff

81
mip/mip.c
View File

@ -296,6 +296,13 @@ static void arp_cache_add(struct mip_if *ifp, uint32_t ip, uint8_t mac[6]) {
mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]));
}
static size_t ether_output(struct mip_if *ifp, size_t len) {
// size_t min = 64; // Pad short frames to 64 bytes (minimum Ethernet size)
// if (len < min) memset(ifp->tx.buf + len, 0, min - len), len = min;
// mg_hexdump(ifp->tx.buf, len);
return ifp->driver->tx(ifp->tx.buf, len, ifp->driver_data);
}
static void arp_ask(struct mip_if *ifp, uint32_t ip) {
struct eth *eth = (struct eth *) ifp->tx.buf;
struct arp *arp = (struct arp *) (eth + 1);
@ -307,7 +314,7 @@ static void arp_ask(struct mip_if *ifp, uint32_t ip) {
arp->plen = 4;
arp->op = mg_htons(1), arp->tpa = ip, arp->spa = ifp->ip;
memcpy(arp->sha, ifp->mac, sizeof(arp->sha));
ifp->driver->tx(eth, PDIFF(eth, arp + 1), ifp->driver_data);
ether_output(ifp, PDIFF(eth, arp + 1));
}
static size_t mg_print_ipv4(mg_pfn_t fn, void *fn_data, va_list *ap) {
@ -333,11 +340,12 @@ static struct ip *tx_ip(struct mip_if *ifp, uint8_t proto, uint32_t ip_src,
uint32_t ip_dst, size_t plen) {
struct eth *eth = (struct eth *) ifp->tx.buf;
struct ip *ip = (struct ip *) (eth + 1);
uint8_t *mac = arp_cache_find(ifp, ip_dst); // Dst IP in ARP cache ?
if (!mac) mac = arp_cache_find(ifp, ifp->gw); // No, use gateway
if (mac) memcpy(eth->dst, mac, sizeof(eth->dst)); // Found? Use it
if (!mac) memset(eth->dst, 255, sizeof(eth->dst)); // No? Use broadcast
memcpy(eth->src, ifp->mac, sizeof(eth->src)); // TODO(cpq): ARP lookup
uint8_t *mac = arp_cache_find(ifp, ip_dst); // Dst IP in ARP cache ?
if (!mac && (ip_dst & ifp->mask)) arp_ask(ifp, ip_dst); // Same net, lookup
if (!mac) mac = arp_cache_find(ifp, ifp->gw); // Use gateway MAC
if (mac) memcpy(eth->dst, mac, sizeof(eth->dst)); // Found? Use it
if (!mac) memset(eth->dst, 255, sizeof(eth->dst)); // No? Use broadcast
memcpy(eth->src, ifp->mac, sizeof(eth->src)); // TODO(cpq): ARP lookup
eth->type = mg_htons(0x800);
memset(ip, 0, sizeof(*ip));
ip->ver = 0x45; // Version 4, header length 5 words
@ -369,24 +377,11 @@ static void tx_udp(struct mip_if *ifp, uint32_t ip_src, uint16_t sport,
udp->csum = csumfin(cs);
memmove(udp + 1, buf, len);
// MG_DEBUG(("UDP LEN %d %d", (int) len, (int) ifp->frame_len));
ifp->driver->tx(ifp->tx.buf,
sizeof(struct eth) + sizeof(*ip) + sizeof(*udp) + len,
ifp->driver_data);
ether_output(ifp, sizeof(struct eth) + sizeof(*ip) + sizeof(*udp) + len);
}
static void tx_dhcp(struct mip_if *ifp, uint32_t src, uint32_t dst,
uint8_t *opts, size_t optslen) {
#if 0
struct dhcp {
uint8_t op, htype, hlen, hops;
uint32_t xid;
uint16_t secs, flags;
uint32_t ciaddr, yiaddr, siaddr, giaddr;
uint8_t hwaddr[208];
uint32_t magic;
uint8_t options[32];
};
#endif
struct dhcp dhcp = {1, 1, 6, 0, 0, 0, 0, 0, 0, 0, 0, {0}, 0, {0}};
dhcp.magic = mg_htonl(0x63825363);
memcpy(&dhcp.hwaddr, ifp->mac, sizeof(ifp->mac));
@ -435,7 +430,7 @@ static void rx_arp(struct mip_if *ifp, struct pkt *pkt) {
arp->tpa = pkt->arp->spa;
arp->spa = ifp->ip;
MG_DEBUG(("ARP response: we're %#lx", (long) mg_ntohl(ifp->ip)));
ifp->driver->tx(ifp->tx.buf, PDIFF(eth, arp + 1), ifp->driver_data);
ether_output(ifp, PDIFF(eth, arp + 1));
} else if (pkt->arp->op == mg_htons(2)) {
if (memcmp(pkt->arp->tha, ifp->mac, sizeof(pkt->arp->tha)) != 0) return;
// MG_INFO(("ARP RESPONSE"));
@ -446,15 +441,16 @@ static void rx_arp(struct mip_if *ifp, struct pkt *pkt) {
static void rx_icmp(struct mip_if *ifp, struct pkt *pkt) {
// MG_DEBUG(("ICMP %d", (int) len));
if (pkt->icmp->type == 8 && pkt->ip != NULL && pkt->ip->dst == ifp->ip) {
struct ip *ip = tx_ip(ifp, 1, ifp->ip, pkt->ip->src,
sizeof(struct icmp) + pkt->pay.len);
size_t hlen = sizeof(struct eth) + sizeof(struct ip) + sizeof(struct icmp);
size_t space = ifp->tx.len - hlen, plen = pkt->pay.len;
if (plen > space) plen = space;
struct ip *ip =
tx_ip(ifp, 1, ifp->ip, pkt->ip->src, sizeof(struct icmp) + plen);
struct icmp *icmp = (struct icmp *) (ip + 1);
size_t len = PDIFF(ifp->tx.buf, icmp + 1), left = ifp->tx.len - len;
if (left > pkt->pay.len) left = pkt->pay.len; // Don't overflow TX
memset(icmp, 0, sizeof(*icmp)); // Set csum to 0
memcpy(icmp + 1, pkt->pay.buf, left); // Copy RX payload to TX
icmp->csum = ipcsum(icmp, sizeof(*icmp) + left);
ifp->driver->tx(ifp->tx.buf, len + left, ifp->driver_data);
memset(icmp, 0, sizeof(*icmp)); // Set csum to 0
memcpy(icmp + 1, pkt->pay.buf, plen); // Copy RX payload to TX
icmp->csum = ipcsum(icmp, sizeof(*icmp) + plen);
ether_output(ifp, hlen + plen);
}
}
@ -538,8 +534,7 @@ static size_t tx_tcp(struct mip_if *ifp, uint32_t dst_ip, uint8_t flags,
cs = csumup(cs, &ip->dst, sizeof(ip->dst));
cs = csumup(cs, pseudo, sizeof(pseudo));
tcp->csum = csumfin(cs);
return ifp->driver->tx(ifp->tx.buf, PDIFF(ifp->tx.buf, tcp + 1) + len,
ifp->driver_data);
return ether_output(ifp, PDIFF(ifp->tx.buf, tcp + 1) + len);
}
static size_t tx_tcp_pkt(struct mip_if *ifp, struct pkt *pkt, uint8_t flags,
@ -608,16 +603,17 @@ long mg_io_recv(struct mg_connection *c, void *buf, size_t len) {
static void read_conn(struct mg_connection *c, struct pkt *pkt) {
struct connstate *s = (struct connstate *) (c + 1);
struct mg_iobuf *io = c->is_tls ? &s->raw : &c->recv;
uint32_t seq = mg_ntohl(pkt->tcp->seq);
s->raw.align = c->recv.align;
if (pkt->tcp->flags & TH_FIN) {
s->ack = mg_htonl(pkt->tcp->seq) + 1, s->seq = mg_htonl(pkt->tcp->ack);
c->is_closing = 1;
} else if (pkt->pay.len == 0) {
// TODO(cpq): handle this peer's ACK
} else if (mg_ntohl(pkt->tcp->seq) != s->ack) {
} else if (seq != s->ack) {
// TODO(cpq): peer sent us SEQ which we don't expect. Retransmit rather
// than close this connection
mg_error(c, "SEQ != ACK: %x %x", mg_ntohl(pkt->tcp->seq), s->ack);
mg_error(c, "SEQ != ACK: %x %x", seq, s->ack);
} else if (io->size - io->len < pkt->pay.len &&
!mg_iobuf_resize(io, io->len + pkt->pay.len)) {
mg_error(c, "oom");
@ -629,9 +625,18 @@ static void read_conn(struct mg_connection *c, struct pkt *pkt) {
// call back mg_io_recv() which grabs raw data from s->raw
memcpy(&io->buf[io->len], pkt->pay.buf, pkt->pay.len);
io->len += pkt->pay.len;
// Advance ACK counter and setup a timer to send an ACK back
MG_DEBUG(("%lu SEQ %x -> %x", c->id, mg_htonl(pkt->tcp->seq), s->ack));
s->ack = (uint32_t) (mg_htonl(pkt->tcp->seq) + pkt->pay.len);
#if 1
// Send ACK immediately
MG_DEBUG((" imm ACK", c->id, mg_htonl(pkt->tcp->seq), s->ack));
tx_tcp((struct mip_if *) c->mgr->priv, c->rem.ip, TH_ACK, c->loc.port,
c->rem.port, mg_htonl(s->seq), mg_htonl(s->ack), "", 0);
#else
// Advance ACK counter and setup a timer to send an ACK back
settmout(c, MIP_TTYPE_ACK);
#endif
if (c->is_tls) {
// TLS connection. Make room for decrypted data in c->recv
@ -699,7 +704,7 @@ static void rx_tcp(struct mip_if *ifp, struct pkt *pkt) {
}
static void rx_ip(struct mip_if *ifp, struct pkt *pkt) {
// MG_DEBUG(("IP %d", (int) pkt->pay.len));
// MG_DEBUG(("IP %d", (int) pkt->pay.len));
if (pkt->ip->proto == 1) {
pkt->icmp = (struct icmp *) (pkt->ip + 1);
if (pkt->pay.len < sizeof(*pkt->icmp)) return;
@ -771,6 +776,10 @@ static void mip_rx(struct mip_if *ifp, void *buf, size_t len) {
pkt.ip = (struct ip *) (pkt.eth + 1);
if (pkt.raw.len < sizeof(*pkt.eth) + sizeof(*pkt.ip)) return; // Truncated
if ((pkt.ip->ver >> 4) != 4) return; // Not IP
// Truncate frame to what IP header tells us
if ((size_t) mg_ntohs(pkt.ip->len) + sizeof(struct eth) < pkt.raw.len) {
pkt.raw.len = (size_t) mg_ntohs(pkt.ip->len) + sizeof(struct eth);
}
mkpay(&pkt, pkt.ip + 1);
rx_ip(ifp, &pkt);
} else {
@ -823,7 +832,7 @@ static void mip_poll(struct mip_if *ifp, uint64_t uptime_ms) {
struct connstate *s = (struct connstate *) (c + 1);
if (uptime_ms > s->timer) {
if (s->ttype == MIP_TTYPE_ACK) {
MG_DEBUG(("%lu ack", c->id));
MG_DEBUG(("%lu ack %x %x", c->id, s->seq, s->ack));
tx_tcp(ifp, c->rem.ip, TH_ACK, c->loc.port, c->rem.port,
mg_htonl(s->seq), mg_htonl(s->ack), "", 0);
} else {

81
mongoose.c
View File

@ -6608,6 +6608,13 @@ static void arp_cache_add(struct mip_if *ifp, uint32_t ip, uint8_t mac[6]) {
mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]));
}
static size_t ether_output(struct mip_if *ifp, size_t len) {
// size_t min = 64; // Pad short frames to 64 bytes (minimum Ethernet size)
// if (len < min) memset(ifp->tx.buf + len, 0, min - len), len = min;
// mg_hexdump(ifp->tx.buf, len);
return ifp->driver->tx(ifp->tx.buf, len, ifp->driver_data);
}
static void arp_ask(struct mip_if *ifp, uint32_t ip) {
struct eth *eth = (struct eth *) ifp->tx.buf;
struct arp *arp = (struct arp *) (eth + 1);
@ -6619,7 +6626,7 @@ static void arp_ask(struct mip_if *ifp, uint32_t ip) {
arp->plen = 4;
arp->op = mg_htons(1), arp->tpa = ip, arp->spa = ifp->ip;
memcpy(arp->sha, ifp->mac, sizeof(arp->sha));
ifp->driver->tx(eth, PDIFF(eth, arp + 1), ifp->driver_data);
ether_output(ifp, PDIFF(eth, arp + 1));
}
static size_t mg_print_ipv4(mg_pfn_t fn, void *fn_data, va_list *ap) {
@ -6645,11 +6652,12 @@ static struct ip *tx_ip(struct mip_if *ifp, uint8_t proto, uint32_t ip_src,
uint32_t ip_dst, size_t plen) {
struct eth *eth = (struct eth *) ifp->tx.buf;
struct ip *ip = (struct ip *) (eth + 1);
uint8_t *mac = arp_cache_find(ifp, ip_dst); // Dst IP in ARP cache ?
if (!mac) mac = arp_cache_find(ifp, ifp->gw); // No, use gateway
if (mac) memcpy(eth->dst, mac, sizeof(eth->dst)); // Found? Use it
if (!mac) memset(eth->dst, 255, sizeof(eth->dst)); // No? Use broadcast
memcpy(eth->src, ifp->mac, sizeof(eth->src)); // TODO(cpq): ARP lookup
uint8_t *mac = arp_cache_find(ifp, ip_dst); // Dst IP in ARP cache ?
if (!mac && (ip_dst & ifp->mask)) arp_ask(ifp, ip_dst); // Same net, lookup
if (!mac) mac = arp_cache_find(ifp, ifp->gw); // Use gateway MAC
if (mac) memcpy(eth->dst, mac, sizeof(eth->dst)); // Found? Use it
if (!mac) memset(eth->dst, 255, sizeof(eth->dst)); // No? Use broadcast
memcpy(eth->src, ifp->mac, sizeof(eth->src)); // TODO(cpq): ARP lookup
eth->type = mg_htons(0x800);
memset(ip, 0, sizeof(*ip));
ip->ver = 0x45; // Version 4, header length 5 words
@ -6681,24 +6689,11 @@ static void tx_udp(struct mip_if *ifp, uint32_t ip_src, uint16_t sport,
udp->csum = csumfin(cs);
memmove(udp + 1, buf, len);
// MG_DEBUG(("UDP LEN %d %d", (int) len, (int) ifp->frame_len));
ifp->driver->tx(ifp->tx.buf,
sizeof(struct eth) + sizeof(*ip) + sizeof(*udp) + len,
ifp->driver_data);
ether_output(ifp, sizeof(struct eth) + sizeof(*ip) + sizeof(*udp) + len);
}
static void tx_dhcp(struct mip_if *ifp, uint32_t src, uint32_t dst,
uint8_t *opts, size_t optslen) {
#if 0
struct dhcp {
uint8_t op, htype, hlen, hops;
uint32_t xid;
uint16_t secs, flags;
uint32_t ciaddr, yiaddr, siaddr, giaddr;
uint8_t hwaddr[208];
uint32_t magic;
uint8_t options[32];
};
#endif
struct dhcp dhcp = {1, 1, 6, 0, 0, 0, 0, 0, 0, 0, 0, {0}, 0, {0}};
dhcp.magic = mg_htonl(0x63825363);
memcpy(&dhcp.hwaddr, ifp->mac, sizeof(ifp->mac));
@ -6747,7 +6742,7 @@ static void rx_arp(struct mip_if *ifp, struct pkt *pkt) {
arp->tpa = pkt->arp->spa;
arp->spa = ifp->ip;
MG_DEBUG(("ARP response: we're %#lx", (long) mg_ntohl(ifp->ip)));
ifp->driver->tx(ifp->tx.buf, PDIFF(eth, arp + 1), ifp->driver_data);
ether_output(ifp, PDIFF(eth, arp + 1));
} else if (pkt->arp->op == mg_htons(2)) {
if (memcmp(pkt->arp->tha, ifp->mac, sizeof(pkt->arp->tha)) != 0) return;
// MG_INFO(("ARP RESPONSE"));
@ -6758,15 +6753,16 @@ static void rx_arp(struct mip_if *ifp, struct pkt *pkt) {
static void rx_icmp(struct mip_if *ifp, struct pkt *pkt) {
// MG_DEBUG(("ICMP %d", (int) len));
if (pkt->icmp->type == 8 && pkt->ip != NULL && pkt->ip->dst == ifp->ip) {
struct ip *ip = tx_ip(ifp, 1, ifp->ip, pkt->ip->src,
sizeof(struct icmp) + pkt->pay.len);
size_t hlen = sizeof(struct eth) + sizeof(struct ip) + sizeof(struct icmp);
size_t space = ifp->tx.len - hlen, plen = pkt->pay.len;
if (plen > space) plen = space;
struct ip *ip =
tx_ip(ifp, 1, ifp->ip, pkt->ip->src, sizeof(struct icmp) + plen);
struct icmp *icmp = (struct icmp *) (ip + 1);
size_t len = PDIFF(ifp->tx.buf, icmp + 1), left = ifp->tx.len - len;
if (left > pkt->pay.len) left = pkt->pay.len; // Don't overflow TX
memset(icmp, 0, sizeof(*icmp)); // Set csum to 0
memcpy(icmp + 1, pkt->pay.buf, left); // Copy RX payload to TX
icmp->csum = ipcsum(icmp, sizeof(*icmp) + left);
ifp->driver->tx(ifp->tx.buf, len + left, ifp->driver_data);
memset(icmp, 0, sizeof(*icmp)); // Set csum to 0
memcpy(icmp + 1, pkt->pay.buf, plen); // Copy RX payload to TX
icmp->csum = ipcsum(icmp, sizeof(*icmp) + plen);
ether_output(ifp, hlen + plen);
}
}
@ -6850,8 +6846,7 @@ static size_t tx_tcp(struct mip_if *ifp, uint32_t dst_ip, uint8_t flags,
cs = csumup(cs, &ip->dst, sizeof(ip->dst));
cs = csumup(cs, pseudo, sizeof(pseudo));
tcp->csum = csumfin(cs);
return ifp->driver->tx(ifp->tx.buf, PDIFF(ifp->tx.buf, tcp + 1) + len,
ifp->driver_data);
return ether_output(ifp, PDIFF(ifp->tx.buf, tcp + 1) + len);
}
static size_t tx_tcp_pkt(struct mip_if *ifp, struct pkt *pkt, uint8_t flags,
@ -6920,16 +6915,17 @@ long mg_io_recv(struct mg_connection *c, void *buf, size_t len) {
static void read_conn(struct mg_connection *c, struct pkt *pkt) {
struct connstate *s = (struct connstate *) (c + 1);
struct mg_iobuf *io = c->is_tls ? &s->raw : &c->recv;
uint32_t seq = mg_ntohl(pkt->tcp->seq);
s->raw.align = c->recv.align;
if (pkt->tcp->flags & TH_FIN) {
s->ack = mg_htonl(pkt->tcp->seq) + 1, s->seq = mg_htonl(pkt->tcp->ack);
c->is_closing = 1;
} else if (pkt->pay.len == 0) {
// TODO(cpq): handle this peer's ACK
} else if (mg_ntohl(pkt->tcp->seq) != s->ack) {
} else if (seq != s->ack) {
// TODO(cpq): peer sent us SEQ which we don't expect. Retransmit rather
// than close this connection
mg_error(c, "SEQ != ACK: %x %x", mg_ntohl(pkt->tcp->seq), s->ack);
mg_error(c, "SEQ != ACK: %x %x", seq, s->ack);
} else if (io->size - io->len < pkt->pay.len &&
!mg_iobuf_resize(io, io->len + pkt->pay.len)) {
mg_error(c, "oom");
@ -6941,9 +6937,18 @@ static void read_conn(struct mg_connection *c, struct pkt *pkt) {
// call back mg_io_recv() which grabs raw data from s->raw
memcpy(&io->buf[io->len], pkt->pay.buf, pkt->pay.len);
io->len += pkt->pay.len;
// Advance ACK counter and setup a timer to send an ACK back
MG_DEBUG(("%lu SEQ %x -> %x", c->id, mg_htonl(pkt->tcp->seq), s->ack));
s->ack = (uint32_t) (mg_htonl(pkt->tcp->seq) + pkt->pay.len);
#if 1
// Send ACK immediately
MG_DEBUG((" imm ACK", c->id, mg_htonl(pkt->tcp->seq), s->ack));
tx_tcp((struct mip_if *) c->mgr->priv, c->rem.ip, TH_ACK, c->loc.port,
c->rem.port, mg_htonl(s->seq), mg_htonl(s->ack), "", 0);
#else
// Advance ACK counter and setup a timer to send an ACK back
settmout(c, MIP_TTYPE_ACK);
#endif
if (c->is_tls) {
// TLS connection. Make room for decrypted data in c->recv
@ -7011,7 +7016,7 @@ static void rx_tcp(struct mip_if *ifp, struct pkt *pkt) {
}
static void rx_ip(struct mip_if *ifp, struct pkt *pkt) {
// MG_DEBUG(("IP %d", (int) pkt->pay.len));
// MG_DEBUG(("IP %d", (int) pkt->pay.len));
if (pkt->ip->proto == 1) {
pkt->icmp = (struct icmp *) (pkt->ip + 1);
if (pkt->pay.len < sizeof(*pkt->icmp)) return;
@ -7083,6 +7088,10 @@ static void mip_rx(struct mip_if *ifp, void *buf, size_t len) {
pkt.ip = (struct ip *) (pkt.eth + 1);
if (pkt.raw.len < sizeof(*pkt.eth) + sizeof(*pkt.ip)) return; // Truncated
if ((pkt.ip->ver >> 4) != 4) return; // Not IP
// Truncate frame to what IP header tells us
if ((size_t) mg_ntohs(pkt.ip->len) + sizeof(struct eth) < pkt.raw.len) {
pkt.raw.len = (size_t) mg_ntohs(pkt.ip->len) + sizeof(struct eth);
}
mkpay(&pkt, pkt.ip + 1);
rx_ip(ifp, &pkt);
} else {
@ -7135,7 +7144,7 @@ static void mip_poll(struct mip_if *ifp, uint64_t uptime_ms) {
struct connstate *s = (struct connstate *) (c + 1);
if (uptime_ms > s->timer) {
if (s->ttype == MIP_TTYPE_ACK) {
MG_DEBUG(("%lu ack", c->id));
MG_DEBUG(("%lu ack %x %x", c->id, s->seq, s->ack));
tx_tcp(ifp, c->rem.ip, TH_ACK, c->loc.port, c->rem.port,
mg_htonl(s->seq), mg_htonl(s->ack), "", 0);
} else {