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-rw-r--r--src/osd/modules/netdev/pcap.cpp248
1 files changed, 132 insertions, 116 deletions
diff --git a/src/osd/modules/netdev/pcap.cpp b/src/osd/modules/netdev/pcap.cpp
index 68e9512b14a..8ad62773d58 100644
--- a/src/osd/modules/netdev/pcap.cpp
+++ b/src/osd/modules/netdev/pcap.cpp
@@ -1,22 +1,31 @@
// license:BSD-3-Clause
// copyright-holders:Carl
-#if defined(OSD_NET_USE_PCAP)
-
-#include "emu.h"
-#include "osdnet.h"
#include "netdev_module.h"
+
#include "modules/osdmodule.h"
+
+#if defined(OSD_NET_USE_PCAP)
+
+#include "netdev_common.h"
+
#include "modules/lib/osdlib.h"
+#include "osdcore.h" // osd_printf_*
+
+#include "util/strformat.h" // string_format
+
+#include <memory>
+#include <vector>
+
#if defined(SDLMAME_WIN32) || defined(OSD_WINDOWS)
#include <windows.h>
#undef interface
#define LIB_NAME "wpcap.dll"
#elif defined(SDLMAME_MACOSX)
+#include <atomic>
#include <pthread.h>
-#include <libkern/OSAtomic.h>
#define LIB_NAME "libpcap.dylib"
#else
@@ -25,6 +34,10 @@
#include <pcap.h>
+namespace osd {
+
+namespace {
+
// Typedefs for dynamically loaded functions
typedef int (*pcap_findalldevs_fn)(pcap_if_t **, char *);
typedef pcap_t *(*pcap_open_live_fn)(const char *, int, int, int, char *);
@@ -39,16 +52,16 @@ typedef int (*pcap_dispatch_fn)(pcap_t *, int, pcap_handler, u_char *);
class pcap_module : public osd_module, public netdev_module
{
public:
- pcap_module()
- : osd_module(OSD_NETDEV_PROVIDER, "pcap"), netdev_module(),
- pcap_findalldevs_dl(nullptr), pcap_open_live_dl(nullptr), pcap_next_ex_dl(nullptr), pcap_compile_dl(nullptr),
- pcap_close_dl(nullptr), pcap_setfilter_dl(nullptr), pcap_sendpacket_dl(nullptr), pcap_set_datalink_dl(nullptr), pcap_dispatch_dl(nullptr)
+ pcap_module() :
+ osd_module(OSD_NETDEV_PROVIDER, "pcap"), netdev_module(),
+ pcap_findalldevs_dl(nullptr), pcap_open_live_dl(nullptr), pcap_next_ex_dl(nullptr), pcap_compile_dl(nullptr),
+ pcap_close_dl(nullptr), pcap_setfilter_dl(nullptr), pcap_sendpacket_dl(nullptr), pcap_set_datalink_dl(nullptr), pcap_dispatch_dl(nullptr)
{
}
virtual ~pcap_module() { }
- virtual int init(const osd_options &options) override;
+ virtual int init(osd_interface &osd, const osd_options &options) override;
virtual void exit() override;
virtual bool probe() override
@@ -76,6 +89,20 @@ public:
return true;
}
+ virtual std::unique_ptr<network_device> open_device(int id, network_handler &handler) override;
+ virtual std::vector<network_device_info> list_devices() override;
+
+private:
+ struct device_info
+ {
+ std::string name;
+ std::string description;
+ };
+
+ class netdev_pcap;
+
+ std::vector<device_info> m_devices;
+
osd::dynamic_module::ptr pcap_dll;
pcap_findalldevs_fn pcap_findalldevs_dl;
@@ -89,192 +116,161 @@ public:
pcap_dispatch_fn pcap_dispatch_dl;
};
-// FIXME: bridge between pcap_module and netdev_pcap
-static pcap_module *module = nullptr;
-
-#ifdef SDLMAME_MACOSX
-struct netdev_pcap_context {
- uint8_t *pkt;
- int len;
- pcap_t *p;
-
- uint8_t packets[32][1600];
- int packetlens[32];
- int head;
- int tail;
-};
-#endif
-
-class netdev_pcap : public osd_netdev
+class pcap_module::netdev_pcap : public network_device_base
{
public:
- netdev_pcap(const char *name, class device_network_interface *ifdev, int rate);
+ netdev_pcap(pcap_module &module, const char *name, network_handler &handler);
~netdev_pcap();
- virtual int send(uint8_t *buf, int len) override;
- virtual void set_mac(const char *mac) override;
+ virtual int send(void const *buf, int len) override;
+
protected:
virtual int recv_dev(uint8_t **buf) override;
+
private:
+ pcap_module &m_module;
pcap_t *m_p;
#ifdef SDLMAME_MACOSX
- struct netdev_pcap_context m_ctx;
pthread_t m_thread;
+ uint8_t *pkt;
+ int len;
+ pcap_t *p;
+ uint8_t m_pktbuf[2048];
+
+ uint8_t m_packets[32][1600];
+ int m_packetlens[32];
+ std::atomic<int> m_head;
+ std::atomic<int> m_tail;
+
+ static void pcap_handler(u_char *user, const struct pcap_pkthdr *h, const u_char *bytes);
+ static void *pcap_blocker(void *arg);
#endif
};
#ifdef SDLMAME_MACOSX
-static void netdev_pcap_handler(u_char *user, const struct pcap_pkthdr *h, const u_char *bytes) {
- struct netdev_pcap_context *ctx = (struct netdev_pcap_context*)user;
+void pcap_module::netdev_pcap::pcap_handler(u_char *user, const struct pcap_pkthdr *h, const u_char *bytes)
+{
+ netdev_pcap *const ctx = reinterpret_cast<netdev_pcap *>(user);
- if(!ctx->p) return;
+ if (!ctx->p)
+ return;
- if(OSAtomicCompareAndSwapInt((ctx->head+1) & 0x1F, ctx->tail, &ctx->tail)) {
+ int const curr = ctx->m_head.load(std::memory_order_relaxed);
+ int const next = (curr + 1) & 0x1f;
+ if (ctx->m_tail.load(std::memory_order_acquire) == next)
+ {
printf("buffer full, dropping packet\n");
return;
}
- memcpy(ctx->packets[ctx->head], bytes, h->len);
- ctx->packetlens[ctx->head] = h->len;
- OSAtomicCompareAndSwapInt(ctx->head, (ctx->head+1) & 0x1F, &ctx->head);
+ memcpy(ctx->m_packets[curr], bytes, h->len);
+ ctx->m_packetlens[curr] = h->len;
+ ctx->m_head.store(next, std::memory_order_release);
}
-static void *netdev_pcap_blocker(void *arg) {
- struct netdev_pcap_context *ctx = (struct netdev_pcap_context*)arg;
+void *pcap_module::netdev_pcap::pcap_blocker(void *arg)
+{
+ netdev_pcap *const ctx = reinterpret_cast<netdev_pcap *>(arg);
- while(ctx && ctx->p) {
- (*module->pcap_dispatch_dl)(ctx->p, 1, netdev_pcap_handler, (u_char*)ctx);
- }
+ while (ctx && ctx->p)
+ (*ctx->m_module.pcap_dispatch_dl)(ctx->p, 1, &netdev_pcap::pcap_handler, reinterpret_cast<u_char *>(ctx));
- return 0;
+ return nullptr;
}
#endif
-netdev_pcap::netdev_pcap(const char *name, class device_network_interface *ifdev, int rate)
- : osd_netdev(ifdev, rate)
+pcap_module::netdev_pcap::netdev_pcap(pcap_module &module, const char *name, network_handler &handler) :
+ network_device_base(handler),
+ m_module(module),
+ m_p(nullptr)
{
char errbuf[PCAP_ERRBUF_SIZE];
#if defined(SDLMAME_WIN32) || defined(OSD_WINDOWS)
- m_p = (*module->pcap_open_live_dl)(name, 65535, 1, -1, errbuf);
+ m_p = (*m_module.pcap_open_live_dl)(name, 65535, 1, -1, errbuf);
#else
- m_p = (*module->pcap_open_live_dl)(name, 65535, 1, 1, errbuf);
+ m_p = (*m_module.pcap_open_live_dl)(name, 65535, 1, 1, errbuf);
#endif
if(!m_p)
{
osd_printf_error("Unable to open %s: %s\n", name, errbuf);
return;
}
- if ((*module->pcap_set_datalink_dl)(m_p, DLT_EN10MB) == -1)
+ if ((*m_module.pcap_set_datalink_dl)(m_p, DLT_EN10MB) == -1)
{
osd_printf_error("Unable to set %s to ethernet", name);
- (*module->pcap_close_dl)(m_p);
+ (*m_module.pcap_close_dl)(m_p);
m_p = nullptr;
return;
}
- netdev_pcap::set_mac(get_mac());
#ifdef SDLMAME_MACOSX
- m_ctx.head = 0;
- m_ctx.tail = 0;
- m_ctx.p = m_p;
- pthread_create(&m_thread, nullptr, netdev_pcap_blocker, &m_ctx);
+ m_head = 0;
+ m_tail = 0;
+ p = m_p;
+ pthread_create(&m_thread, nullptr, &netdev_pcap::pcap_blocker, this);
#endif
}
-void netdev_pcap::set_mac(const char *mac)
+int pcap_module::netdev_pcap::send(void const *buf, int len)
{
- char filter[256];
- struct bpf_program fp;
- if(!m_p) return;
-#ifdef SDLMAME_MACOSX
- sprintf(filter, "not ether src %.2X:%.2X:%.2X:%.2X:%.2X:%.2X and (ether dst %.2X:%.2X:%.2X:%.2X:%.2X:%.2X or ether multicast or ether broadcast or ether dst 09:00:07:ff:ff:ff)", (unsigned char)mac[0], (unsigned char)mac[1], (unsigned char)mac[2],(unsigned char)mac[3], (unsigned char)mac[4], (unsigned char)mac[5], (unsigned char)mac[0], (unsigned char)mac[1], (unsigned char)mac[2],(unsigned char)mac[3], (unsigned char)mac[4], (unsigned char)mac[5]);
-#else
- sprintf(filter, "ether dst %.2X:%.2X:%.2X:%.2X:%.2X:%.2X or ether multicast or ether broadcast", (unsigned char)mac[0], (unsigned char)mac[1], (unsigned char)mac[2],(unsigned char)mac[3], (unsigned char)mac[4], (unsigned char)mac[5]);
-#endif
- if ((*module->pcap_compile_dl)(m_p, &fp, filter, 1, 0) == -1) {
- osd_printf_error("Error with pcap_compile\n");
- }
- if ((*module->pcap_setfilter_dl)(m_p, &fp) == -1) {
- osd_printf_error("Error with pcap_setfilter\n");
- }
-}
-
-int netdev_pcap::send(uint8_t *buf, int len)
-{
- int ret;
- if(!m_p) {
+ if (!m_p)
+ {
printf("send invoked, but no pcap context\n");
return 0;
}
- ret = (*module->pcap_sendpacket_dl)(m_p, buf, len);
+ int ret = (*m_module.pcap_sendpacket_dl)(m_p, reinterpret_cast<const u_char *>(buf), len);
printf("sent packet length %d, returned %d\n", len, ret);
return ret ? len : 0;
- //return (!pcap_sendpacket_dl(m_p, buf, len))?len:0;
+ //return (!pcap_sendpacket_dl(m_p, reinterpret_cast<const u_char *>(buf), len)) ? len : 0;
}
-int netdev_pcap::recv_dev(uint8_t **buf)
+int pcap_module::netdev_pcap::recv_dev(uint8_t **buf)
{
-#ifdef SDLMAME_MACOSX
- uint8_t pktbuf[2048];
- int ret;
-
// no device open?
- if(!m_p) return 0;
+ if (!m_p)
+ return 0;
+#ifdef SDLMAME_MACOSX
// Empty
- if(OSAtomicCompareAndSwapInt(m_ctx.head, m_ctx.tail, &m_ctx.tail)) {
+ int const curr = m_tail.load(std::memory_order_relaxed);
+ if (m_head.load(std::memory_order_acquire) == curr)
return 0;
- }
- memcpy(pktbuf, m_ctx.packets[m_ctx.tail], m_ctx.packetlens[m_ctx.tail]);
- ret = m_ctx.packetlens[m_ctx.tail];
- OSAtomicCompareAndSwapInt(m_ctx.tail, (m_ctx.tail+1) & 0x1F, &m_ctx.tail);
- *buf = pktbuf;
+ memcpy(m_pktbuf, m_packets[curr], m_packetlens[curr]);
+ int ret = m_packetlens[curr];
+ m_tail.store((curr + 1) & 0x1f, std::memory_order_release);
+ *buf = m_pktbuf;
return ret;
#else
struct pcap_pkthdr *header;
- if(!m_p) return 0;
- return ((*module->pcap_next_ex_dl)(m_p, &header, (const u_char **)buf) == 1)?header->len:0;
+ return ((*m_module.pcap_next_ex_dl)(m_p, &header, (const u_char **)buf) == 1)?header->len:0;
#endif
}
-netdev_pcap::~netdev_pcap()
+pcap_module::netdev_pcap::~netdev_pcap()
{
#ifdef SDLMAME_MACOSX
- m_ctx.p = nullptr;
+ p = nullptr;
pthread_cancel(m_thread);
pthread_join(m_thread, nullptr);
#endif
- if(m_p) (*module->pcap_close_dl)(m_p);
+ if(m_p) (*m_module.pcap_close_dl)(m_p);
m_p = nullptr;
}
-static CREATE_NETDEV(create_pcap)
-{
- class netdev_pcap *dev = global_alloc(netdev_pcap(ifname, ifdev, rate));
- return dynamic_cast<osd_netdev *>(dev);
-}
-
-int pcap_module::init(const osd_options &options)
+int pcap_module::init(osd_interface &osd, const osd_options &options)
{
pcap_if_t *devs;
char errbuf[PCAP_ERRBUF_SIZE];
- // FIXME: bridge between pcap_module and netdev_pcap
- module = this;
-
if ((*pcap_findalldevs_dl)(&devs, errbuf) == -1)
{
osd_printf_error("Unable to get network devices: %s\n", errbuf);
return 1;
}
- while(devs)
+ while (devs)
{
- if(devs->description) {
- add_netdev(devs->name, devs->description, create_pcap);
- } else {
- add_netdev(devs->name, devs->name, create_pcap);
- }
+ m_devices.emplace_back(device_info{ devs->name, devs->description ? devs->description : devs->name });
devs = devs->next;
}
return 0;
@@ -282,15 +278,35 @@ int pcap_module::init(const osd_options &options)
void pcap_module::exit()
{
- clear_netdev();
+ m_devices.clear();
}
+std::unique_ptr<network_device> pcap_module::open_device(int id, network_handler &handler)
+{
+ if ((0 > id) || (m_devices.size() <= id))
+ return nullptr;
+
+ return std::make_unique<netdev_pcap>(*this, m_devices[id].name.c_str(), handler);
+}
+
+std::vector<network_device_info> pcap_module::list_devices()
+{
+ std::vector<network_device_info> result;
+ result.reserve(m_devices.size());
+ for (int id = 0; m_devices.size() > id; ++id)
+ result.emplace_back(network_device_info{ id, m_devices[id].description });
+ return result;
+}
+
+} // anonymous namespace
+
+} // namespace osd
+
#else
- #include "modules/osdmodule.h"
- #include "netdev_module.h"
- MODULE_NOT_SUPPORTED(pcap_module, OSD_NETDEV_PROVIDER, "pcap")
+namespace osd { namespace { MODULE_NOT_SUPPORTED(pcap_module, OSD_NETDEV_PROVIDER, "pcap") } }
+
#endif
-MODULE_DEFINITION(NETDEV_PCAP, pcap_module)
+MODULE_DEFINITION(NETDEV_PCAP, osd::pcap_module)