zec
/
zcash-seeder
mirror of https://github.com/zcash/zcash-seeder.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Merge pull request #19 

bb53306 dns: listen on ipv6 (Pavel Vasin)
34fd288 remove option to build without ipv6 support (Pavel Vasin)
This commit is contained in:
Pieter Wuille 2015-07-29 15:55:24 +02:00
parent 69436e5f4b bb53306a2e
commit a59329d936
No known key found for this signature in database
GPG Key ID: 57896D2FF8F0B657
5 changed files with 21 additions and 57 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Makefile
View File

@ -5,7 +5,7 @@ dnsseed: dns.o bitcoin.o netbase.o protocol.o db.o main.o util.o
g++ -pthread $(LDFLAGS) -o dnsseed dns.o bitcoin.o netbase.o protocol.o db.o main.o util.o -lcrypto
%.o: %.cpp bitcoin.h netbase.h protocol.h db.h serialize.h uint256.h util.h
g++ -DUSE_IPV6 -pthread $(CXXFLAGS) -Wno-invalid-offsetof -c -o $@ $<
g++ -pthread $(CXXFLAGS) -Wno-invalid-offsetof -c -o $@ $<
dns.o: dns.c
gcc -pthread -std=c99 $(CXXFLAGS) dns.c -c -o dns.o

40
dns.c
View File

@ -18,18 +18,18 @@
#if defined IP_RECVDSTADDR
# define DSTADDR_SOCKOPT IP_RECVDSTADDR
# define DSTADDR_DATASIZE (CMSG_SPACE(sizeof(struct in_addr)))
# define DSTADDR_DATASIZE (CMSG_SPACE(sizeof(struct in6_addr)))
# define dstaddr(x) (CMSG_DATA(x))
#elif defined IP_PKTINFO
struct in_pktinfo {
unsigned int ipi_ifindex; /* Interface index */
struct in_addr ipi_spec_dst; /* Local address */
struct in_addr ipi_addr; /* Header Destination address */
};
#elif defined IPV6_PKTINFO
struct in6_pktinfo
{
struct in6_addr ipi6_addr; /* src/dst IPv6 address */
unsigned int ipi6_ifindex; /* send/recv interface index */
};
# define DSTADDR_SOCKOPT IP_PKTINFO
# define DSTADDR_DATASIZE (CMSG_SPACE(sizeof(struct in_pktinfo)))
# define dstaddr(x) (&(((struct in_pktinfo *)(CMSG_DATA(x)))->ipi_addr))
# define DSTADDR_SOCKOPT IPV6_PKTINFO
# define DSTADDR_DATASIZE (CMSG_SPACE(sizeof(struct in6_pktinfo)))
# define dstaddr(x) (&(((struct in6_pktinfo *)(CMSG_DATA(x)))->ipi6_addr))
#else
# error "can't determine socket option"
#endif
@ -380,31 +380,31 @@ error:
static int listenSocket = -1;
int dnsserver(dns_opt_t *opt) {
struct sockaddr_in si_other;
struct sockaddr_in6 si_other;
int senderSocket = -1;
senderSocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
senderSocket = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
if (senderSocket == -1)
return -3;
int replySocket;
if (listenSocket == -1) {
struct sockaddr_in si_me;
if ((listenSocket=socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP))==-1) {
struct sockaddr_in6 si_me;
if ((listenSocket=socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP))==-1) {
listenSocket = -1;
return -1;
}
replySocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
replySocket = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
if (replySocket == -1)
{
close(listenSocket);
return -1;
}
int sockopt = 1;
setsockopt(listenSocket, IPPROTO_IP, DSTADDR_SOCKOPT, &sockopt, sizeof sockopt);
setsockopt(listenSocket, IPPROTO_IPV6, DSTADDR_SOCKOPT, &sockopt, sizeof sockopt);
memset((char *) &si_me, 0, sizeof(si_me));
si_me.sin_family = AF_INET;
si_me.sin_port = htons(opt->port);
si_me.sin_addr.s_addr = INADDR_ANY;
si_me.sin6_family = AF_INET6;
si_me.sin6_port = htons(opt->port);
si_me.sin6_addr = in6addr_any;
if (bind(listenSocket, (struct sockaddr*)&si_me, sizeof(si_me))==-1)
return -2;
}
@ -428,7 +428,7 @@ int dnsserver(dns_opt_t *opt) {
for (; 1; ++(opt->nRequests))
{
ssize_t insize = recvmsg(listenSocket, &msg, 0);
unsigned char *addr = (unsigned char*)&si_other.sin_addr.s_addr;
// unsigned char *addr = (unsigned char*)&si_other.sin_addr.s_addr;
// printf("DNS: Request %llu from %i.%i.%i.%i:%i of %i bytes\n", (unsigned long long)(opt->nRequests), addr[0], addr[1], addr[2], addr[3], ntohs(si_other.sin_port), (int)insize);
if (insize <= 0)
continue;

2
main.cpp
View File

@ -204,14 +204,12 @@ public:
memcpy(&a.data.v4, &addr, 4);
cache.push_back(a);
nIPv4++;
#ifdef USE_IPV6
} else if ((*it).GetIn6Addr(&addr6)) {
addr_t a;
a.v = 6;
memcpy(&a.data.v6, &addr6, 16);
cache.push_back(a);
nIPv6++;
#endif
}
}
cacheHits = 0;

30
netbase.cpp
View File

@ -74,18 +74,10 @@ bool static LookupIntern(const char *pszName, std::vector<CNetAddr>& vIP, unsign
aiHint.ai_socktype = SOCK_STREAM;
aiHint.ai_protocol = IPPROTO_TCP;
#ifdef WIN32
# ifdef USE_IPV6
aiHint.ai_family = AF_UNSPEC;
# else
aiHint.ai_family = AF_INET;
# endif
aiHint.ai_flags = fAllowLookup ? 0 : AI_NUMERICHOST;
#else
# ifdef USE_IPV6
aiHint.ai_family = AF_UNSPEC;
# else
aiHint.ai_family = AF_INET;
# endif
aiHint.ai_flags = fAllowLookup ? AI_ADDRCONFIG : AI_NUMERICHOST;
#endif
struct addrinfo *aiRes = NULL;
@ -102,13 +94,11 @@ bool static LookupIntern(const char *pszName, std::vector<CNetAddr>& vIP, unsign
vIP.push_back(CNetAddr(((struct sockaddr_in*)(aiTrav->ai_addr))->sin_addr));
}
#ifdef USE_IPV6
if (aiTrav->ai_family == AF_INET6)
{
assert(aiTrav->ai_addrlen >= sizeof(sockaddr_in6));
vIP.push_back(CNetAddr(((struct sockaddr_in6*)(aiTrav->ai_addr))->sin6_addr));
}
#endif
aiTrav = aiTrav->ai_next;
}
@ -323,11 +313,7 @@ bool static ConnectSocketDirectly(const CService &addrConnect, SOCKET& hSocketRe
{
hSocketRet = INVALID_SOCKET;
#ifdef USE_IPV6
struct sockaddr_storage sockaddr;
#else
struct sockaddr sockaddr;
#endif
socklen_t len = sizeof(sockaddr);
if (!addrConnect.GetSockAddr((struct sockaddr*)&sockaddr, &len)) {
printf("Cannot connect to %s: unsupported network\n", addrConnect.ToString().c_str());
@ -578,12 +564,10 @@ CNetAddr::CNetAddr(const struct in_addr& ipv4Addr)
memcpy(ip+12, &ipv4Addr, 4);
}
#ifdef USE_IPV6
CNetAddr::CNetAddr(const struct in6_addr& ipv6Addr)
{
memcpy(ip, &ipv6Addr, 16);
}
#endif
CNetAddr::CNetAddr(const char *pszIp, bool fAllowLookup)
{
@ -772,11 +756,7 @@ std::string CNetAddr::ToStringIP() const
if (IsI2P())
return EncodeBase32(&ip[6], 10) + ".oc.b32.i2p";
CService serv(*this, 0);
#ifdef USE_IPV6
struct sockaddr_storage sockaddr;
#else
struct sockaddr sockaddr;
#endif
socklen_t socklen = sizeof(sockaddr);
if (serv.GetSockAddr((struct sockaddr*)&sockaddr, &socklen)) {
char name[1025] = "";
@ -821,13 +801,11 @@ bool CNetAddr::GetInAddr(struct in_addr* pipv4Addr) const
return true;
}
#ifdef USE_IPV6
bool CNetAddr::GetIn6Addr(struct in6_addr* pipv6Addr) const
{
memcpy(pipv6Addr, ip, 16);
return true;
}
#endif
// get canonical identifier of an address' group
// no two connections will be attempted to addresses with the same group
@ -1013,23 +991,19 @@ CService::CService(const struct in_addr& ipv4Addr, unsigned short portIn) : CNet
{
}
#ifdef USE_IPV6
CService::CService(const struct in6_addr& ipv6Addr, unsigned short portIn) : CNetAddr(ipv6Addr), port(portIn)
{
}
#endif
CService::CService(const struct sockaddr_in& addr) : CNetAddr(addr.sin_addr), port(ntohs(addr.sin_port))
{
assert(addr.sin_family == AF_INET);
}
#ifdef USE_IPV6
CService::CService(const struct sockaddr_in6 &addr) : CNetAddr(addr.sin6_addr), port(ntohs(addr.sin6_port))
{
assert(addr.sin6_family == AF_INET6);
}
#endif
bool CService::SetSockAddr(const struct sockaddr *paddr)
{
@ -1037,11 +1011,9 @@ bool CService::SetSockAddr(const struct sockaddr *paddr)
case AF_INET:
*this = CService(*(const struct sockaddr_in*)paddr);
return true;
#ifdef USE_IPV6
case AF_INET6:
*this = CService(*(const struct sockaddr_in6*)paddr);
return true;
#endif
default:
return false;
}
@ -1113,7 +1085,6 @@ bool CService::GetSockAddr(struct sockaddr* paddr, socklen_t *addrlen) const
paddrin->sin_port = htons(port);
return true;
}
#ifdef USE_IPV6
if (IsIPv6()) {
if (*addrlen < (socklen_t)sizeof(struct sockaddr_in6))
return false;
@ -1126,7 +1097,6 @@ bool CService::GetSockAddr(struct sockaddr* paddr, socklen_t *addrlen) const
paddrin6->sin6_port = htons(port);
return true;
}
#endif
return false;
}

4
netbase.h
View File

@ -74,10 +74,8 @@ class CNetAddr
int GetReachabilityFrom(const CNetAddr *paddrPartner = NULL) const;
void print() const;
#ifdef USE_IPV6
CNetAddr(const struct in6_addr& pipv6Addr);
bool GetIn6Addr(struct in6_addr* pipv6Addr) const;
#endif
friend bool operator==(const CNetAddr& a, const CNetAddr& b);
friend bool operator!=(const CNetAddr& a, const CNetAddr& b);
@ -118,10 +116,8 @@ class CService : public CNetAddr
std::string ToStringIPPort() const;
void print() const;
#ifdef USE_IPV6
CService(const struct in6_addr& ipv6Addr, unsigned short port);
CService(const struct sockaddr_in6& addr);
#endif
IMPLEMENT_SERIALIZE
(