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Dependencies: C12832 EthernetInterface MQTT mbed-rtos mbed
Fork of HelloMQTT by
Linux-example/LinuxIPStack.h
- Committer:
- weiarm2015
- Date:
- 2015-11-20
- Revision:
- 20:82721643145a
- Parent:
- 8:a3e3113054a1
File content as of revision 20:82721643145a:
#if !defined(LINUX_IPSTACK_H) #define LINUX_IPSTACK_H class IPStack { public: IPStack() { } int Socket_error(const char* aString) { if (errno != EINTR && errno != EAGAIN && errno != EINPROGRESS && errno != EWOULDBLOCK) { if (strcmp(aString, "shutdown") != 0 || (errno != ENOTCONN && errno != ECONNRESET)) printf("Socket error %s in %s for socket %d\n", strerror(errno), aString, mysock); } return errno; } int connect(const char* hostname, int port) { int type = SOCK_STREAM; struct sockaddr_in address; int rc = -1; sa_family_t family = AF_INET; struct addrinfo *result = NULL; struct addrinfo hints = {0, AF_UNSPEC, SOCK_STREAM, IPPROTO_TCP, 0, NULL, NULL, NULL}; if ((rc = getaddrinfo(hostname, NULL, &hints, &result)) == 0) { struct addrinfo* res = result; /* prefer ip4 addresses */ while (res) { if (res->ai_family == AF_INET) { result = res; break; } res = res->ai_next; } if (result->ai_family == AF_INET) { address.sin_port = htons(port); address.sin_family = family = AF_INET; address.sin_addr = ((struct sockaddr_in*)(result->ai_addr))->sin_addr; } else rc = -1; freeaddrinfo(result); } if (rc == 0) { mysock = socket(family, type, 0); if (mysock != -1) { int opt = 1; //if (setsockopt(mysock, SOL_SOCKET, SO_NOSIGPIPE, (void*)&opt, sizeof(opt)) != 0) // printf("Could not set SO_NOSIGPIPE for socket %d", mysock); rc = ::connect(mysock, (struct sockaddr*)&address, sizeof(address)); } } return rc; } int read(char* buffer, int len, int timeout_ms) { struct timeval interval = {timeout_ms / 1000, (timeout_ms % 1000) * 1000}; if (interval.tv_sec < 0 || (interval.tv_sec == 0 && interval.tv_usec <= 0)) { interval.tv_sec = 0; interval.tv_usec = 100; } setsockopt(mysock, SOL_SOCKET, SO_RCVTIMEO, (char *)&interval, sizeof(struct timeval)); //printf("reading %d bytes\n", len); int rc = ::recv(mysock, buffer, (size_t)len, 0); if (rc == -1) Socket_error("read"); //printf("read %d bytes\n", rc); return rc; } int write(char* buffer, int len, int timeout) { struct timeval tv; tv.tv_sec = 0; /* 30 Secs Timeout */ tv.tv_usec = timeout * 1000; // Not init'ing this can cause strange errors setsockopt(mysock, SOL_SOCKET, SO_RCVTIMEO, (char *)&tv,sizeof(struct timeval)); int rc = ::write(mysock, buffer, len); //printf("write rc %d\n", rc); return rc; } int disconnect() { return ::close(mysock); } private: int mysock; }; #endif