Here is a list of all documented files with brief descriptions:

[detail level 1234]

libsofia-sip-ua
http
sofia-sip
http.h	HTTP message, methods, headers
http_hclasses.h	HTTP header classes
http_header.h	HTTP library prototypes
http_parser.h	Typedefs and prototypes used by HTTP parser
http_status.h	HTTP status codes
http_tag_class.h	Tag classes for HTTP headers
sofia-sip
http_protos.h	Macros for each HTTP header
http_tag.h	Tag class for HTTP headers