c-multiaddr/README.md

c-multiaddr

multiaddr for IPFS in C.

Multiaddr provides easy networking protocols nesting, easy encapsulation of extra protocols, easy tunneling, etc.

Usage:

All you need to include is multiaddr.h

Maddr struct:

• char string[]; // String that contains addresses such as /ip4/192.168.1.1/
• uint8_t bytes; //String that contains the enecoded address
• int bsize[]; //int[1] that contains the real bytes size (Use it whenever using the bytes so you don't input trash!)

New Multi Address From String(new_maddr_fs)

char addrstr[] = "/ip4/192.168.1.1/" struct maddr a; a=new_maddr_fs(addrstr);

Obtaining the byte buffer(.bytes, .bsize[0]):

printf("TEST BYTES: %s\n",Var_To_Hex(a.bsize[0], a.bytes)); Var_To_Hex = Byte Buffer to Hex String Hex_To_Var = Hex String to Byte Buffer

Encapsulation & Decapsulation(m_encapsulate, m_decapsulate)

Remember, Decapsulation happens from right to left, never in reverse, if you have /ip4/udp/ipfs/ if you decapsulate "udp" you will also take out ipfs!

• Now the string is: /ip4/192.168.1.1/
• m_encapsulate(&a,"/udp/3333/"); //Adds udp/3333/ to char addrstr
• Now the string is: /ip4/192.168.1.1/udp/3333/
• m_decapsulate(&a,"udp"); //Removes udp protocol and its address
• Now the string is: /ip4/192.168.1.1/
• m_encapsulate(&a,"/tcp/8080");
• Now the string is: /ip4/192.168.1.1/tcp/8080/

Constructing a multiaddress from bytes:

• struct maddr beta;
• beta=new_maddr_fb(a.bytes,a.bsize[0]); //This will already construct back to the string too!
• printf("B STRING: %s\n",beta.string); //So after encapsulation and decapsulation atm this string would
• contain: /ip4/192.168.1.1/tcp/8080/