1 #include "processing.hpp"
2 
3 #include <boost/algorithm/string/predicate.hpp>
4 
5 #include <iostream>
6 
7 bool getWellKnown(
8     const boost::container::flat_map<std::string, std::string>& owners,
9     const std::string& request, std::string& wellKnown)
10 {
11     // If it's already a well known name, just return
12     if (!boost::starts_with(request, ":"))
13     {
14         wellKnown = request;
15         return true;
16     }
17 
18     auto it = owners.find(request);
19     if (it == owners.end())
20     {
21         return false;
22     }
23     wellKnown = it->second;
24     return true;
25 }
26 
27 bool needToIntrospect(const std::string& processName,
28                       const WhiteBlackList& whiteList,
29                       const WhiteBlackList& blackList)
30 {
31     auto inWhitelist =
32         std::find_if(whiteList.begin(), whiteList.end(),
33                      [&processName](const auto& prefix) {
34                          return boost::starts_with(processName, prefix);
35                      }) != whiteList.end();
36 
37     // This holds full service names, not prefixes
38     auto inBlacklist = blackList.find(processName) != blackList.end();
39 
40     return inWhitelist && !inBlacklist;
41 }
42 
43 void processNameChangeDelete(
44     boost::container::flat_map<std::string, std::string>& nameOwners,
45     const std::string& wellKnown, const std::string& oldOwner,
46     interface_map_type& interfaceMap, AssociationMaps& assocMaps,
47     sdbusplus::asio::object_server& server)
48 {
49     if (boost::starts_with(oldOwner, ":"))
50     {
51         auto it = nameOwners.find(oldOwner);
52         if (it != nameOwners.end())
53         {
54             nameOwners.erase(it);
55         }
56     }
57     // Connection removed
58     interface_map_type::iterator pathIt = interfaceMap.begin();
59     while (pathIt != interfaceMap.end())
60     {
61         // If an associations interface is being removed,
62         // also need to remove the corresponding associations
63         // objects and properties.
64         auto ifaces = pathIt->second.find(wellKnown);
65         if (ifaces != pathIt->second.end())
66         {
67             auto assoc = std::find(ifaces->second.begin(), ifaces->second.end(),
68                                    assocDefsInterface);
69             if (assoc != ifaces->second.end())
70             {
71                 removeAssociation(pathIt->first, wellKnown, server, assocMaps);
72             }
73 
74             // Instead of checking if every single path is the endpoint of an
75             // association that needs to be moved to pending, only check when
76             // we own this path as well, which would be because of an
77             // association.
78             if ((pathIt->second.size() == 2) &&
79                 (pathIt->second.find("xyz.openbmc_project.ObjectMapper") !=
80                  pathIt->second.end()))
81             {
82                 // Remove the 2 association D-Bus paths and move the
83                 // association to pending.
84                 moveAssociationToPending(pathIt->first, assocMaps, server);
85             }
86         }
87         pathIt->second.erase(wellKnown);
88         if (pathIt->second.empty())
89         {
90             // If the last connection to the object is gone,
91             // delete the top level object
92             pathIt = interfaceMap.erase(pathIt);
93             continue;
94         }
95         pathIt++;
96     }
97 }
98 
99 void processInterfaceAdded(interface_map_type& interfaceMap,
100                            const sdbusplus::message::object_path& objPath,
101                            const InterfacesAdded& intfAdded,
102                            const std::string& wellKnown,
103                            AssociationMaps& assocMaps,
104                            sdbusplus::asio::object_server& server)
105 {
106     auto& ifaceList = interfaceMap[objPath.str];
107 
108     for (const auto& interfacePair : intfAdded)
109     {
110         ifaceList[wellKnown].emplace(interfacePair.first);
111 
112         if (interfacePair.first == assocDefsInterface)
113         {
114             const std::variant<std::vector<Association>>* variantAssociations =
115                 nullptr;
116             for (const auto& interface : interfacePair.second)
117             {
118                 if (interface.first == assocDefsProperty)
119                 {
120                     variantAssociations = &(interface.second);
121                 }
122             }
123             if (variantAssociations == nullptr)
124             {
125                 std::cerr << "Illegal association found on " << wellKnown
126                           << "\n";
127                 continue;
128             }
129             std::vector<Association> associations =
130                 std::get<std::vector<Association>>(*variantAssociations);
131             associationChanged(server, associations, objPath.str, wellKnown,
132                                interfaceMap, assocMaps);
133         }
134     }
135 
136     // To handle the case where an object path is being created
137     // with 2 or more new path segments, check if the parent paths
138     // of this path are already in the interface map, and add them
139     // if they aren't with just the default freedesktop interfaces.
140     // This would be done via introspection if they would have
141     // already existed at startup.  While we could also introspect
142     // them now to do the work, we know there aren't any other
143     // interfaces or we would have gotten signals for them as well,
144     // so take a shortcut to speed things up.
145     //
146     // This is all needed so that mapper operations can be done
147     // on the new parent paths.
148     using iface_map_iterator = interface_map_type::iterator;
149     using iface_map_value_type =
150         boost::container::flat_map<std::string,
151                                    boost::container::flat_set<std::string>>;
152     using name_map_iterator = iface_map_value_type::iterator;
153 
154     static const boost::container::flat_set<std::string> defaultIfaces{
155         "org.freedesktop.DBus.Introspectable", "org.freedesktop.DBus.Peer",
156         "org.freedesktop.DBus.Properties"};
157 
158     std::string parent = objPath.str;
159     auto pos = parent.find_last_of('/');
160 
161     while (pos != std::string::npos)
162     {
163         parent = parent.substr(0, pos);
164 
165         std::pair<iface_map_iterator, bool> parentEntry =
166             interfaceMap.insert(std::make_pair(parent, iface_map_value_type{}));
167 
168         std::pair<name_map_iterator, bool> ifaceEntry =
169             parentEntry.first->second.insert(
170                 std::make_pair(wellKnown, defaultIfaces));
171 
172         if (!ifaceEntry.second)
173         {
174             // Entry was already there for this name so done.
175             break;
176         }
177 
178         pos = parent.find_last_of('/');
179     }
180 
181     // The new interface might have an association pending
182     checkIfPendingAssociation(objPath.str, interfaceMap, assocMaps, server);
183 }
184