From 65f196f0c5758018cb738fee6fbae088d513b3bd Mon Sep 17 00:00:00 2001 From: Bent Bisballe Nyeng Date: Wed, 21 May 2014 14:51:02 +0200 Subject: Missing file for cprlistener. --- src/aa_socket.cc | 256 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ src/aa_socket.h | 42 +++++++++ 2 files changed, 298 insertions(+) create mode 100644 src/aa_socket.cc create mode 100644 src/aa_socket.h (limited to 'src') diff --git a/src/aa_socket.cc b/src/aa_socket.cc new file mode 100644 index 0000000..bd9328c --- /dev/null +++ b/src/aa_socket.cc @@ -0,0 +1,256 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ + +#include "aa_socket.h" + +#include +#include + +#include +using namespace std; + +#include +//#include +#include +#include +#include + +#include + +#include +#if defined(linux) +#include +#else +#include +#endif /*defined(linux)*/ + +// for gethostbyname +#include + +// These functions are wrappers, to preserve my nice method naming! +inline int _socket(int a,int b,int c){return socket(a,b,c);} +inline int _connect(int a,const struct sockaddr *b,socklen_t c){return connect(a,b,c);} +inline int _listen(int a,int b){return listen(a,b);} +inline int _send(int a,char *b,unsigned int c, int d){return send(a,b,c,d);} + + +AASocket::AASocket() +{ +} + +AASocket::~AASocket() +{ + int err = close(socket); // close server + if(err == -1) throw Network_error("close", strerror(errno)); +} + +void AASocket::connect(const char *host, unsigned short port) +{ + // create socket + socket = _socket(PF_INET, SOCK_STREAM, IPPROTO_TCP); + // PF_INET: ipv4, PF_INET6: ipv6 + // tcp: IPPROTO_TCP + // upd: IPPROTO_UDP + + if (socket == -1) throw Network_error("socket", strerror(errno)); + + socketaddr.sin_family = AF_INET; // Use "internet protocol" IP + socketaddr.sin_port = htons(port); // connect to that port + socketaddr.sin_addr.s_addr = INADDR_ANY; + // INADDR_ANY puts your IP address automatically + + + + struct hostent *hp = gethostbyname(host); + // memcpy(&socketaddr.sin_addr.s_addr, *(hp->h_addr_list),sizeof(struct in_addr)); + memcpy(&(socketaddr.sin_addr),*(hp->h_addr_list),sizeof(struct in_addr)); + + // FIXME: gethostbyname() + // socketaddr.sin_addr.s_addr = inet_addr(host); + //inet_aton (ip, &socketaddr.sin_addr); + + int err = _connect(socket, (struct sockaddr*)&socketaddr, sizeof(socketaddr)); + if(err == -1) throw Network_error("connect", strerror(errno)); +} + +void AASocket::listen(unsigned short port) +{ + int err; + + bind_socket = _socket(PF_INET, SOCK_STREAM, IPPROTO_TCP); + if(bind_socket == -1) throw Network_error("tmp socket", strerror(errno)); + + int optval = 1; + err = setsockopt(bind_socket, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval)); + if(err == -1) throw Network_error("setsockopt", strerror(errno)); + + socketaddr.sin_family = AF_INET; // Use "internet protocol" IP + socketaddr.sin_port = htons(port); // connect to that port + socketaddr.sin_addr.s_addr = INADDR_ANY; + // INADDR_ANY puts your IP address automatically + + // bind socket to address specified by "sa" parameter + err = bind(bind_socket, (struct sockaddr*)&socketaddr, sizeof(socketaddr)); + if(err == -1) throw Network_error("bind", strerror(errno)); + + err = _listen(bind_socket, 5); + if(err == -1) throw Network_error("listen", strerror(errno)); + + int csalen = sizeof(socketaddr); + socket = accept(bind_socket, + (struct sockaddr*)&socketaddr, + (socklen_t*)&csalen); + if(socket == -1) throw Network_error("accept", strerror(errno)); + + err = close(bind_socket); // We don't need this anymore + bind_socket = -1; + if(err == -1) throw Network_error("tmp close", strerror(errno)); +} + + +void AASocket::force_close() +{ + if(bind_socket != -1) close(bind_socket); // This should break the accept call +} + + +void AASocket::send(const char* buf, unsigned int size) +{ + //unsigned int newsize = size + sizeof(unsigned int); + // char *newbuf = new char[newsize]; + + unsigned int nsize = htonl(size); + int n = _send(socket, (char*)&nsize, sizeof(unsigned int), MSG_WAITALL); + if(n == -1) throw Network_error("send", strerror(errno)); + + n = _send(socket, (char *)buf, size, MSG_WAITALL); + if(n == -1) throw Network_error("send", strerror(errno)); +} + + +int AASocket::receive(char* buf, unsigned int size) +{ + unsigned int insize; + + int n = recv(socket, &insize, sizeof(unsigned int), MSG_WAITALL); + if(n == -1) throw Network_error("recv", strerror(errno)); + + insize = ntohl(insize); + + if(insize > size) { + char err_buf[256]; + sprintf(err_buf, "Buffer is too small. Should be %d is %d." , insize, size); + throw Network_error("receive", err_buf); + } + + n = recv(socket, buf, insize, MSG_WAITALL); + if(n == -1) throw Network_error("recv", strerror(errno)); + + return n; +} + + +void AASocket::send_string(string str) +{ + this->send((char*)str.c_str(), str.length()); +} + + +string AASocket::receive_string() +{ + char buf[1024]; + memset(buf, 0, sizeof(buf)); + + receive(buf, sizeof(buf)); + + return string(buf); +} + + + +#ifdef TEST_SOCKET + +/** + * Test application for AASocket + * It should print the following to stdout: + * A: Hello, how are you? + * B: Fine thanks. + * A: What about you? + * B: I'm fine too. + */ + +#include +#include + +#include +#include + +int main() +{ + char buf[1024]; + memset(buf, 0, sizeof(buf)); + int f = fork(); + switch(f) { + case -1: // Fork error + perror("Fork failed!"); + return 1; + + case 0: // Forked child + { + try { + AASocket out; + + sleep(1); // Make sure the other end is listening + + // Test connect + out.connect("127.0.0.1", 6666); + + // Test raw communication send + sprintf(buf, "Hello how are you?"); + out.send(buf, sizeof(buf)); + + // Test raw communication receive + out.receive(buf, sizeof(buf)); + std::cout << "B: " << buf << std::endl; + + // Test string receive + std::string q = out.receive_string(); + std::cout << "B: " << q << std::endl; + + // Test string send + out.send_string(std::string("I'm fine too.")); + return 0; + } catch(Network_error e) { + std::cerr << "Out: " << e.error << std::endl; + } + } + default: // Parent + { + try { + AASocket in; + + // Test listen + in.listen(6666); + + // Test raw communication receive + in.receive(buf, sizeof(buf)); + std::cout << "A: " << buf << std::endl; + + // Test raw communication send + sprintf(buf, "Fine thanks."); + in.send(buf, sizeof(buf)); + + // Test string send + in.send_string(std::string("What about you?")); + + // Test string receive + std::string a = in.receive_string(); + std::cout << "A: " << a << std::endl; + return 0; + } catch(Network_error e) { + std::cerr << "In: " << e.error << std::endl; + } + } + } + return 0; +} +#endif/*TEST_SOCKET*/ diff --git a/src/aa_socket.h b/src/aa_socket.h new file mode 100644 index 0000000..8b077f3 --- /dev/null +++ b/src/aa_socket.h @@ -0,0 +1,42 @@ +#ifndef __SOCKET_H__ +#define __SOCKET_H__ + +#include + +#include +//#include + + +/** + * Exceptions + */ +struct Network_error { + Network_error(const char *event, const char *err) { + error = std::string(err) + " - in " + std::string(event); + } + std::string error; +}; + +class AASocket { +public: + AASocket(); + ~AASocket(); + + void listen(unsigned short port); + void connect(const char *ip, unsigned short port); + + void send(const char* buf, unsigned int buf_size); + int receive(char* buf, unsigned int buf_size); + + void send_string(std::string buf); + std::string receive_string(); + + void force_close(); + +private: + struct sockaddr_in socketaddr; + int socket; + int bind_socket; // Tmp socket for listen. +}; + +#endif/*__SOCKET_H__*/ -- cgit v1.2.3