Various socket functions + misc

headers/functions/arm9/libs.h

@@ -312,6 +312,8 @@ int SoundLfoWave_SawFunc(struct dse_lfo* lfo);
 int SoundLfoWave_ReverseSawFunc(struct dse_lfo* lfo);
 int SoundLfoWave_HalfNoiseFunc(struct dse_lfo* lfo);
 int SoundLfoWave_FullNoiseFunc(struct dse_lfo* lfo);
+void Crypto_RC4Init(undefined* ctx, const void* key, uint8_t key_len);
+void Crypto_RC4Encrypt(undefined* ctx, const void* src, size_t size, void* dst);
 void EnableVramBanksInSetDontSave(struct vram_banks_set vram_banks);
 void EnableVramBanksInSet(struct vram_banks_set* vram_banks);
 void G3_LoadMtx43(struct matrix_4x3* matrix);
@@ -349,6 +351,9 @@ void FileInit(struct file_stream* file);
 bool GetOverlayInfo(struct overlay_info_entry* overlay_info, undefined param_2, int overlay_id);
 bool LoadOverlayInternal(struct overlay_info_entry* overlay_info);
 void InitOverlay(struct overlay_info_entry* overlay_info);
+void MD5_Init(undefined* ctx);
+void MD5_Update(undefined* ctx, const void* buf, size_t size);
+void MD5_Digest(uint32_t* hash, undefined* ctx);
 uint32_t PM_ForceToPowerOff(void);
 
 // If declaring these builtins causes issues, you can disable them

headers/functions/overlay00.h

@@ -2,5 +2,35 @@
 #define HEADERS_FUNCTIONS_OVERLAY00_H_
 
 void SelectRandomBackground(void);
+int close(int fd);
+int socket(int domain, int family, int protocol);
+int bind(int sockfd, const struct sockaddr_in* addr);
+int connect(int sockfd, const struct sockaddr_in* addr);
+int recv(int sockfd, void* buf, size_t size, int flags);
+int recvfrom(int sockfd, void* buf, size_t size, int flags, struct sockaddr_in* addr, int addr_len);
+int send(int sockfd, const void* buf, size_t size, int flags);
+int sendto(int sockfd, const void* buf, size_t size, int flags, const struct sockaddr_in* addr,
+           int addr_len);
+int CloseVeneer(int fd);
+int fcntl(int fd, int op, uint32_t op_arg);
+int InitWfc(void);
+int SocketCastError(int error, int cast_error);
+int SocketCreate(int domain, int family, int protocol);
+int SocketClose(int fd);
+int SocketBind(int sockfd, const struct sockaddr_in* addr, int addr_len);
+int SocketConnect(int sockfd, const struct sockaddr_in* addr, int addr_len);
+int SocketRecv(int sockfd, void* buf, size_t size, int flags);
+int SocketRecvFrom(int sockfd, void* buf, size_t size, int flags, struct sockaddr_in* addr,
+                   int addr_len);
+int SocketSend(int sockfd, const void* buf, size_t size, int flags);
+int SocketSendTo(int sockfd, const void* buf, size_t size, int flags,
+                 const struct sockaddr_in* addr, int addr_len);
+bool SocketSetBlocking(int sockfd, bool blocking);
+int DoRand(uint32_t ctx);
+int rand(void);
+void srand(uint32_t seed);
+int RandRangeOverlay0(int x, int y);
+void ResolveAvailableNintendoWifi(const char* identifier);
+void PasswordEncryptString(const char* src, char* dst);
 
 #endif

headers/types/common/util.h

@@ -295,4 +295,13 @@ struct system_clock {
 };
 ASSERT_SIZE(struct system_clock, 28);
 
+// IPv4 Internet domain socket address.
+struct sockaddr_in {
+    uint8_t len; // always 8
+    uint8_t family;
+    uint16_t port;
+    uint8_t ip[4];
+};
+ASSERT_SIZE(struct sockaddr_in, 8);
+
 #endif

symbols/arm9/libs.yml

@@ -1183,6 +1183,24 @@ libs:
         EU: 0x2075AB8
         NA: 0x2075720
         JP: 0x2075A08
+      description: |-
+        Initializes an RC4 context.
+
+        r0: context
+        r1: key
+        r2: key length (clamped down to a maximum of 16)
+    - name: Crypto_RC4Encrypt
+      address:
+        EU: 0x2075B48
+        NA: 0x20757B0
+        JP: 0x2075A98
+      description: |-
+        Encrypts/decrypts a buffer using an RC4 context.
+
+        r0: context
+        r1: src
+        r2: size
+        r3: dest
     - name: Mtx_LookAt
       address:
         EU: 0x2075BC0
@@ -2181,6 +2199,36 @@ libs:
         This function is responsible for jumping to all the pointers located in the overlay's static init array, among other things.
 
         r0: Overlay info struct
+    - name: MD5_Init
+      address:
+        EU: 0x2080494
+        NA: 0x20800FC
+        JP: 0x20803E4
+      description: |-
+        Initializes an MD5 context.
+
+        r0: context
+    - name: MD5_Update
+      address:
+        EU: 0x20804D4
+        NA: 0x208013C
+        JP: 0x2080424
+      description: |-
+        Updates an MD5 context using a buffer's bytes.
+
+        r0: context
+        r1: buffer
+        r2: size of buffer
+    - name: MD5_Digest
+      address:
+        EU: 0x208059C
+        NA: 0x2080204
+        JP: 0x20804EC
+      description: |-
+        Calculates and stores an MD5 hash into a destination buffer. The MD5 context is zeroed-out after this operation.
+
+        r0: [output] hash buffer (16 bytes)
+        r1: context
     - name: PM_ForceToPowerOff
       address:
         EU: 0x20823A4